Answer:
(b) the speed of light depends on the index of refraction of the medium thru which it is traveling - different colors have different indices of refraction and are refracted at different angles
Alyssa would like to consume carbohydrates from a healthy carb source. What would be a good choice for her to consume?
The kind of food that she may have to consume is garlic bread.
Is garlic bread a healthy source of carbohydrates?Garlic bread is a type of bread that is usually made with bread, butter, and garlic.
Garlic bread is generally high in calories, fat, and sodium, and it may also contain added sugars or artificial flavors. Additionally, the type of bread used to make garlic bread is usually white bread, which is refined and low in fiber.
It can help you to have a whole lot of carbohydrates.
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Answer question in photo
The potential energy of an object is the product of its mass, acceleration due to gravity and height of the object from the surface. Here, the potential energy of the object is 3118.2 J.
What is potential energy ?Potential energy of an object is the energy generated by virtue of its position. It is the energy stored on the object when it is at rest. When the object starts moving its potential energy starts to convert to kinetic energy.
the potential energy of an object is related to its mass, acceleration due to gravity g and height from the surface h as:
P = mgh.
then, m = 26.21 Kg
h = 12.14 m
g = 9.8 m/s²
p = 26.21 Kg × 9.8 m/s² × 12.14 m = 3118.2 J.
Therefore, the potential energy of the object is 3118.2 J.
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How does changing the distance influence the force between the two charges?
As the distance __________, the absolute value of the force ___________.
increases; increases
increases; decreases
increases; does not change
decreases; does not change
Explanation:
As the distance increases, the absolute value of the force decreases. Therefore, the correct answer is "increases; decreases". This is in accordance with Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. As the distance between the charges increases, the force between them decreases because the inverse square relationship causes the force to weaken rapidly with distance.
the impulse experienced by a car is 4000 kg•m/s. What is the change in it's momentum?
The car's momentum change is 4000 kg/m/s because momentum change equals impulse.
Elaborating:Impulse can be summed up as follows: In this case, the car experienced an impulse of 4000 kg/s. Impulse = force x time.
The following formula can be used to determine the car's change in momentum using this information: The car's momentum change is 4000 kg/m/s because momentum change equals impulse.
How does momentum relate to impulse?The change in an object's momentum caused by a force acting on it for a certain amount of time is equal to impulse. An object's momentum change is measured by its impulse, which is defined as the sum of the object's acting force and time. Calculating impulse can be done by: Force x time is the impulse.
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pls help i need it for tomorrow
An unexpected result is examined a lot more closely, since it must disagree with some currently accepted theory to be accepted as unexpected.
What is an example of a hypothesis ?A scientist may develop the hypothesis that a given type of tomato will be red if it carries the gene for the colour red. The scientist then discovers that every tomato of this variety is red during investigation.
Hypotheses are frequently employed to promote scientific research and enhance knowledge. These clear declarations serve as the cornerstone for all research experiments.
Therefore, a problem in the creation of a hypothesis may lead to errors in the design of a whole experiment.
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Complete the following sentence on what will happen to the two elements in this model: the two elements will or will not bond into one ratio
Answer:
The sentence can be completed as:
The two elements in this model may or may not bond into one ratio, depending on their electronegativities and the specific conditions of the reaction.
A mother with a weight of 60 N is seated on the left side of a see-saw which is 3 m away from the pivot and her son with a weight of 40 N is seated at a distance of 4m on the right. Where should the sister of 10 N be seated to balance the see-saw?
The sister of 10 N should be seated at a distance of 2 m from the pivot to balance the see-saw.
The total weight on the left side is 60 N, and on the right side is 50 N (40 N + 10 N). The two sides must be equal for the see-saw to balance, so 10 N needs to be added to the left side. The sister of 10 N should be placed 2 m away from the pivot on the left side to balance the see-saw.To balance the seesaw it is important that both forces pulling down on each side of the beam are exactly equal. This is only true if the needle is placed exactly in the middle of the candle beam. If one side is slightly longer, this would also make it heavier and it would drop down, as you might have observed.
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If the same force is applied to an object with a small mass,it will have a blank accelertaion
If the same force is applied to an object with a small mass, it will experience a greater acceleration due to less inertia and the ease with which it can be accelerated. In contrast, an object with a larger mass will require more force to achieve the same acceleration.
According to Newton's Second Law of Motion, the acceleration of an object is directly proportional to the force applied to it and inversely proportional to its mass. Mathematically, we can express this relationship as:
acceleration = force / mass
Therefore, if the same force is applied to an object with a small mass, it will experience a greater acceleration compared to an object with a larger mass. This is because the smaller mass results in less inertia, meaning it requires less force to cause a given acceleration. In other words, a smaller mass will accelerate more easily when the same force is applied to it. For example, if you apply the same force to a baseball and a bowling ball, the baseball will accelerate much more quickly because it has a smaller mass than the bowling ball. Conversely, if you apply the same force to a truck and a car, the car will accelerate more quickly because it has a smaller mass than the truck.
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What is the frequency of a wave that has a wave speed of 40 m/s and a wavelength of 0.60 m?
Answer: I believe the frequency of a wave is 66.6667 Hz :)
Explanation:
Consider the circuit
The current in the 5.0 Ohm resistor is:
The voltage across each resistors connected in parallel circuit is the same. Hence, according to Ohm's law, the current through the resistor of 5 ohms is 1.5 A.
What is Ohm's law ?Ohm's law states that, the voltage across a circuit is the product of the resistance through and current flowing through the circuit.
V = I R.
The voltage over resistors connected in series circuit will be different whereas , that for a parallel circuit, voltage is constant.
Given v = 12 V
then, the current through the series circuit is the same for all the components in the circuit.
hence, the total resistance in the branch with 3 ohm and 5 ohms is:
R = R1 + R2 = 5. + 3 = 8 Ω
Now, the current passing through the branch will be 12 V/ 8 Ω = 1.5 A.
Therefore, the current passing through the 5 ohm resistor is 1.5 A.
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On Saturday nights, Greg, likes to go to the Frisco Disco, where he can dance under the strobe light. The strobe contains a 200, u capacitor that stores charge over a 1000 V potential difference. If the strobe flashes 4 times each second, what is the current flow created by the strobe's capacitor?
Explanation:
The current flow created by the strobe's capacitor can be calculated using the formula:
I = C * (ΔV / Δt)
where I is the current flow, C is the capacitance, ΔV is the potential difference, and Δt is the time interval between flashes.
Substituting the given values, we get:
I = 200 * 10^-6 F * (1000 V / 1 s) * 4
Simplifying this expression, we get:
I = 0.8 A
Therefore, the current flow created by the strobe's capacitor is 0.8 amperes
A pulley has a radius of 20 cm and a mass of 6 kg. Find the work and power if the 25kg mass is raised to 12m
To calculate the work done by the pulley and the power required to lift a 25 kg mass to a height of 12 m using the pulley, we need to consider the potential energy gained by the mass and the work done by the pulley.
The potential energy gained by the mass is given by the equation mgh, where m is the mass, g is the acceleration due to gravity (9.81 m/s^2), and h is the height. Substituting the given values, we get: Potential energy gained = 25 kg × 9.81 m/s^2 × 12 m = 2943.6 J. To calculate the work done by the pulley, we need to consider the force required to lift the mass and the distance over which the force is applied. The force required to lift the mass is given by the equation F = mg, where m is the mass and g is the acceleration due to gravity. Substituting the given values, we get: Force required = 25 kg × 9.81 m/s^2 = 245.25 N. The distance over which the force is applied is equal to the distance the mass is lifted, which is 12 m. The work done by the pulley is therefore: Work done by pulley = force × distance = 245.25 N × 12 m = 2943 J. To calculate the power required, we can use the equation power = work/time. The time taken to lift the mass can be calculated using the equation h = ut + 0.5at^2, where u is the initial velocity (zero in this case), a is the acceleration due to gravity, and t is the time taken. Rearranging the equation, we get: Time taken = sqrt(2h/g) = sqrt(2 × 12 m/9.81 m/s^2) = 1.71 s. Substituting the values for work and time, we get: Power required = work/time = 2943 J/1.71 s = 1717.54 W. Therefore, the work done by the pulley is 2943 J and the power required is 1717.54 W to lift a 25 kg mass to a height of 12 m using a pulley with a radius of 20 cm and a mass of 6 kg
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pls help Cassie is taking a tour of a college campus. The tour starts at a statue where she walks 0.25 miles north, 0.18 miles west, 0.28 miles north, 0.33 miles east, then 0.78 miles south. At the end of the tour, what is Cassie's displacement vector from the statue?
a.0.21 miles, 60.0 east of south
b.0.21 miles, 34.6 south of east
c.0.30 miles, 60.0 south of east
d.0.30 miles, 34.6 east of south
Cassie's displacement vector from the statue is 0.30 miles (which is the magnitude of the vector formed by the x and y components) and it points 34.6° east of south.
So the correct answer is option d: 0.30 miles, 34.6 east of south.
What is Displacement Vector?
In physics, displacement vector is a vector that describes the change in position of an object, relative to its starting point, and it's defined as the vector that points from the initial position of the object to its final position.
o find Cassie's displacement vector from the statue, we need to determine the distance and direction from the statue to Cassie's final position. We can use vector addition to add up the individual displacement vectors for each leg of her journey:
The first leg is 0.25 miles north, which can be represented by a vector pointing straight up.
The second leg is 0.18 miles west, which can be represented by a vector pointing straight left.
The third leg is 0.28 miles north, which can be represented by a vector pointing straight up.
The fourth leg is 0.33 miles east, which can be represented by a vector pointing straight right.
The fifth leg is 0.78 miles south, which can be represented by a vector pointing straight down.
We can add these vectors together by breaking them down into their x and y components, then adding the x components separately and the y components separately. The resulting vector will have an x component and a y component that give us the total distance and direction from the statue to Cassie's final position.
The x components of the vectors are:
0 (no x component for the first leg)
-0.18 miles (negative because it's pointing left)
0 (no x component for the third leg)
0.33 miles
0 (no x component for the fifth leg)
Adding these together gives us a total x displacement of:
0 + (-0.18) + 0 + 0.33 + 0 = 0.15 miles east
The y components of the vectors are:
0.25 miles
0 (no y component for the second leg)
0.28 miles
0 (no y component for the fourth leg)
-0.78 miles (negative because it's pointing down)
Adding these together gives us a total y displacement of:
0.25 + 0 + 0.28 + 0 + (-0.78) = -0.25 miles south
Therefore, Cassie's displacement vector from the statue is 0.30 miles (which is the magnitude of the vector formed by the x and y components) and it points 34.6° east of south.
So the correct answer is option d: 0.30 miles, 34.6 east of south.
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A 52 kg child is struck in the face by a 0. 25 kg dodgeball, as he is standing against a wall. If the child is knocked backward at 4. 2 m/s, what is the velocity of the dodgeball? (This answer is going to seem extreme)
The velocity of the dodgeball after the collision is approximately 352.8 m/s.
Using the conservation of momentum principle, we can write:
m_child * 0 + m_dodgeball * v = m_child * (-4.2) + m_dodgeball * v'
Substituting the given values, we get:
0.25 kg * v = 52 kg * (-4.2 m/s) + 0.25 kg * v'
Simplifying and solving for v', we get:
v' = (0.25 kg * v + 52 kg * 4.2 m/s) / 0.25 kg
v' = 352.8 m/s
velocity is a vector quantity that describes the rate of change of an object's position over time. It is defined as the displacement (change in position) of an object divided by the time interval over which the displacement occurred. Velocity is often expressed in units of meters per second (m/s).
Velocity includes both speed and direction, so two objects can have the same speed but different velocities if they are moving in different directions. In addition to describing the motion of objects, velocity is also used to calculate other important quantities in physics, such as acceleration and momentum. It plays a crucial role in many areas of physics, from classical mechanics to relativity, and is a fundamental concept in understanding the behavior of the physical world.
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pls help Demarius is at the bottom of a hill. The hill has an upward slope of 13.5above horizontal. When Demarius has walked 955 meters along this slope, how much elevation has he gained?
a.255 m
b.955 m
c.929 m
d.223 m
Demarius has gained an elevation of 233 m. Option D.
Elevation calculationTo solve this problem, we can use trigonometry. Let's call the elevation Demarius has gained "h". Then, we can use the following trigonometric relationship:
tan θ = h / d
where θ is the angle of the slope (13.5°), and d is the distance Demarius has walked along the slope (955 m).
Rearranging this equation to solve for h, we get:
h = d * tan θ
Substituting the values we know, we get:
h = 955 m * tan 13.5°
h ≈ 223 m
Therefore, Demarius has gained approximately 223 meters in elevation.
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What would be the likeliest effect of moving the pitchers mound in the MLB closer so that it’s 50 feet from home plate?
The guilty batter will often be removed from the game after charging the mound, though depending on the situation, there may also be a fine or suspension. Discipline for throwing a beanball may also be applied to the pitcher.
Pitchers There were worries that the game was unfairly rigged in favor of the pitcher and was therefore no longer entertaining to watch. In order to assist the batters, the pitching mound was dropped from 15 inches to 10 inches, and the strike zone was restored to its 1961 dimensions.Simple logic underlies the decision to relocate the mound: Pitchers in the modern day stand significantly taller and throw much harder than pitchers in the nineteenth century. As a result, today's batters have less time to react to pitches that are released closer to home plate and move faster toward their targets.For more information on MLB pitchers kindly visit to
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It takes a certain power P to keep a plane moving along at a speed v. The power needs to overcome air drag which increases as the speed
increases, and it needs to keep the plane in the air which gets harder as the speed decreases. So assume the power required is given by
P = cv^2+ d/v^2
where c and d are positive constants. (They depend on your plane, your altitude, and the weather, among other things.) Enter here _______
the choice of w that will minimize the power required to keep moving at speed v. Suppose you have a certain
amount of fuel and the fuel flow required to deliver a certain power is proportional to to that power. What is the speed u that will maximize your
range (i.e., the distance you can travel at that speed before your fuel runs out)? Enter your speed here _____
Finally, enter here_____
the ratio of the speed that maximizes the distance and the speed that minimizes the required power.
The ratio of the speed that maximizes the distance and the speed that minimizes the required power is 1.
What is distance?Distance is the measurement of space between two objects or points. It is an important concept in mathematics, physics, and many other scientific fields. Distance can be measured in linear units such as meters, kilometers, feet, or miles. It can also be measured in angular units such as degrees, radians, or arcminutes. Distance can be calculated by using various formulas and calculations, such as the Pythagorean theorem or the distance formula.
The choice of w that will minimize the power required to keep moving at speed v is w = √(d/c). The speed u that will maximize the range is u = √(d/c) × v. The ratio of the speed that maximizes the distance and the speed that minimizes the required power is 1.
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Moving objects have energy in what kind of energy store?
Answer: Kinetic Energy
Side Note: this may not be what you were looking for but, different forces on a object depends on what kind of energy it is, say or if it is moving that means kinetic energy
What difference do you notice between air and water and air and glass
The main differences between air and water and air and glass are their density, viscosity, compressibility, refractive index, and transparency.
Air and water fluctuate in density, viscosity, and compressibility. Air is lots much less dense than water and has a decreased viscosity, which means that it flows greater without difficulty.
Air is also a lot more compressible than water, which means that it may be compressed to a miles smaller volume than water. On the subject of air and glass, there are numerous variations as properly. Glass is stable, whilst air is gasoline.
Glass is also an awful lot denser than air and has a higher refractive index, which means that it bends mild more than air does. This is why lenses manufactured from a glass are frequently used in cameras and telescopes for consciousness mild.
Any other essential distinction between air and glass is their transparency. Air is completely obvious to see light, while glass can both be transparent or opaque depending on its composition and any impurities it may comprise.
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Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are
accurate to 2 significant figures, what is the equivalent resistance between points A and B?
The equivalent resistance between points A and B in the diagram is 22 Ω
How do I determine the equivalent resistance?We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:
Resistor 1 (R₁) = 6 ΩResistor 2 (R₂) = 6 ΩResistor 3 (R₃) = 6 ΩEquivalent resistance (Rₜ) = ?1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃
1/Rₜ = 1/6 + 1/6 + 1/6
1/Rₜ = 3/6
1/Rₜ = 1/2
Rₜ = 2 Ω
Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:
Resistor 1 (R₁) = Resistor 2 (R₂) = ... = Resistor (R₁₁) = 2 ΩEquivalent resistance (R) =?R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁
R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
R = 22Ω
Thus, we can conclude that the equivalent resistance is 22 Ω
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if the distance between 2 troughs is 2.6 meters and a wave is traveling at a speed of 129 m/s, find the period of the wave
The period of the wave is the inverse of the frequency. The distance between the two successive crest or troughs is known as the wavelength. The period of the wave is 0.020 s.
What is period of a wave?The time taken by the particle of the medium to complete one vibration is defined as the period of the wave. The number of oscillations per second is known as the frequency. The equation used to calculate the period of a wave is:
T = 1 / f
The frequency of a wave is:
f = ν / λ
f = 129 m/s / 2.6 m
f = 49.6 Hz
Then the period of a wave is:
T = 1 / f
T = 1 / 49.6
T = 0.020 s
Thus the period of a wave is 0.020 s.
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Which of the following statements best describes what happens to the rocket’s trajectory when the angle of
launch is lowered to 45 degrees?
This means that the rocket will not reach the same height as it would at a higher launch angle, and it will also cover less horizontal distance before hitting the ground.
What is Trajectory angle?
Trajectory angle refers to the angle at which an object is launched or thrown relative to the horizontal plane. It is the angle between the initial velocity vector of the object and the horizontal plane. In physics and engineering, the trajectory angle is an important parameter that determines the trajectory of a projectile or a moving object.
Lowering the angle of launch of a rocket to 45 degrees will result in a shorter and lower trajectory compared to launching the rocket at a higher angle. When the rocket is launched at a lower angle, it will have less vertical velocity and more horizontal velocity compared to a rocket launched at a higher angle.
However, launching the rocket at a lower angle can be useful in certain situations where the goal is to cover a shorter distance or to maintain a lower altitude, such as in a low-altitude reconnaissance mission or in a missile attack where the target is closer.
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what happened to the arctic ocean during the past 40 years
Answer: about half of the sea ice area in the Arctic has been lost.
Explanation: The shrinking summer sea ice cover is a visible manifestation of global warming, and affects marine ecosystems, ocean circulation, and potentially weather events further south of the Arctic.
Which characteristic makes a digital signal more useful than an analog signal for storing information?
A. A digital signal includes a spectrum of colors.
B. A digital signal cannot be heard by humans.
C. A digital signal is more difficult to copy.
D. A digital signal moves between a discrete number of values.
HOW do the diagram and information in the
section "Stages of Photosynthesis"
develop
a coherent understanding of light and dark
reactions?
The diagram and information in the section "Stages of Photosynthesis" provide a coherent understanding of the light and dark reactions of photosynthesis.
What is light and dark reactions?The light-dependent reactions occur in the thylakoid membranes of the chloroplasts and are driven by light energy. The light energy is absorbed by pigments such as chlorophyll and converted into chemical energy in the form of ATP and NADPH. The light-dependent reactions also produce oxygen gas as a byproduct.
The ATP and NADPH produced in the light-dependent reactions are then used in the light-independent reactions, which occur in the stroma of the chloroplasts. The light-independent reactions, also known as the Calvin cycle, use carbon dioxide and the energy from ATP and NADPH to synthesize glucose and other organic compounds. The Calvin cycle does not directly require light, but it is dependent on the products of the light-dependent reactions.
Together, the light-dependent and light-independent reactions of photosynthesis form a coherent cycle that allows plants and other photosynthetic organisms to convert light energy into chemical energy in the form of glucose and other organic compounds. The diagram and information in the section "Stages of Photosynthesis" provide a clear visual and textual representation of this process, helping to develop a coherent understanding of the overall process of photosynthesis.
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an objects potential energy is do to its?
An objects potential energy is due to its state of rest.
Define potential energy
Potential energy is a form of accumulated energy that is dependent on the relationship between different system components. When a spring is compressed or expanded, its potential energy increases. The potential energy of a steel ball is greater when it is raised above the earth than when it is brought to Earth.
Energy that is conserved or kept in a substance or object is known as potential energy. The position, arrangement, or condition of the item or substance determines the amount of stored energy. It can be pictured as energy with the "potential" to perform labor. Mechanical energy, electrical energy, chemical energy, radiant energy, nuclear energy, and heat energy are the six categories of potential energy.
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What is the young’s modulus for polythene in n/m2
The Young's modulus for polythene is 0.3-0.5 GPa (3000-5000 N/m2).
The Young's modulus (E) is a property of the material that tells us how easily it can stretch and deform and is defined as the ratio of tensile stress (σ) to tensile strain (ε). Where stress is the amount of force applied per unit area (σ = F/A) and strain is extension per unit length (ε = dl/l).Young's modulus E, the Young modulus, or the modulus of elasticity in tension or compression, is a mechanical property that measures the tensile or compressive stiffness of a solid material when the force is applied lengthwise.The higher the modulus, the more stress is needed to create the same amount of strain; an idealized rigid body would have an infinite Young's modulus. Conversely, a very soft material (such as a fluid) would deform without force, and would have zero Young's modulus.
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how does temperature affect a football players performance indepented and depented variable, constants and hypothesis
Because you are testing temperature, it is the independent variable. You must calculate each player's score because you're aiming to gauge how effectively football players perform in various environments.
What kind of hypothesis would you use?Hypothesis The amount of happiness increases with daily sun exposure. The assumed cause in this example and the explanatory variables is sun exposure. The assumed impact, or dependent variable, is the degree of happiness.
What does a scientific hypothesis mean?A hypothesis is a statement about the physical world that can be verified by observations or tests. Hypotheses must be falsifiable and subject to scientific scrutiny in order to qualify as scientific.
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the total energy of a system is 300j. if the potential energy is 40j what is the kinetic energy if the object started 300m above the ground?
Answer:
43.3 m/s.
Explanation:
Assuming the potential energy is due to the gravitational potential energy, we can use the conservation of energy to find the kinetic energy:
Total energy = Potential energy + Kinetic energy
Kinetic energy = Total energy - Potential energy
Kinetic energy = 300 J - 40 J = 260 J
However, we need to know the mass of the object to convert the kinetic energy to velocity. We can use the potential energy to find the mass:
Potential energy = mgh
40 J = m(9.81 m/s^2)(300 m)
m = 0.137 kg
Now we can use the kinetic energy to find the velocity:
Kinetic energy = (1/2)mv^2
260 J = (1/2)(0.137 kg)v^2
v^2 = (2*260 J) / 0.137 kg
v = 43.3 m/s (rounded to one decimal place)
Therefore, the kinetic energy is 260 J and the velocity of the object when it reaches the ground is 43.3 m/s.
what's a formula of velocity?
[tex] \boxed{\boxed{ \rm \: Velocity = \dfrac{Displacement}{Time} }}[/tex]