Answer:
You will reach both your arms out to break your fall and save your head.
Explanation:
It common sense you don't want your head injured. Do you?
A truck drives to a rock quarry at a speed of 20 m/s. The truck takes on a load of rocks, which doubles its mass, and leaves at the same speed of 20 m/s. Quantitatively compare the kinetic energy of the truck as it left the quarry with its kinetic energy on the way to the quarry. Explain your answer.
Given that,
A truck drives to a rock quarry at a speed of 20 m/s. The truck takes on a load of rocks, which doubles its mass, and leaves at the same speed of 20 m/s.
To find,
Comparison of the kinetic energy of the truck as it left the quarry with its kinetic energy on the way to the quarry.
Solution,
Kinetic energy of an object is given by:
[tex]K=\dfrac{1}{2}mv^2[/tex]
m is the mass of the truck
[tex]K=\dfrac{1}{2}m\times (20)^2\\\\K=200m\ J[/tex]
If mass is doubled and speed is same i.e. 20 m/s, neew kinetic energy is given by :
[tex]K=\dfrac{1}{2}\times (2m)\times 20^2\\\\K=400m\ J[/tex]
It can be seen that when mass of truck is doubled, its kinetic energy gets doubled.
Each large pizza can feed three teenage boys. How many pizzas would be needed to feed the
football team? (56 teenage boys).
Answer:
19 pizzas
Explanation:
1 pizza = 3 boys
=> 56 ÷ 3 = 18.666666666666.. or about 19 pizzas
Can an object moving upward be in free fall?
Answer:
not if its moving upwards but eventually it will be on its way down
Explanation:
What is the amount of displacement of a runner who runs exactly 2 laps around a 400 meter track?
At the end of the laps, the runner's displacement is zero.
you are at the grand canyon standing at the edge of a ledge 1857 m high you have a mass of 61 kg. you decide to take a selfie to share with your science teacher when you get home which causes you to wonder how much gravitational potential energy do you have standing at the edge of this cliff
Answer:
1,110,114.6 J
Explanation:
The height is 1857m, the mass is 61 kg, and the accelaration is 9.8 m/s^2. Plug in the equation GPE=h*m*a and you get 1,110,114.6.
h= height
m= mass
a= accelaration
GPE= gravitational potential energy
If you are at the grand canyon standing at the edge of a ledge 1857 meters high you have a mass of 61 kilograms, then your gravitational potential energy at the edge of the cliff would be 1111247.37 Joules.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.
As total mechanical energy is the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
The total gravitational potential energy at the edge of the cliff would be
PE = m × g × h
PE =61 × 9.81 × 1857
PE =1111247.37 Joules
Thus, the total gravitational potential energy at the edge of the cliff would be 1111247.37 Joules.
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Thermal energy is the __________ of the particles in a material.
Potential energy
Total energy
Temperature
Average kinetic energy
skateboarding is life
Answer: Sure
Explanation:
Imagine that a car is traveling from your left to your right at a constant velocity. Which two actions could the driver take that may be represented as (a) a velocity vector and an acceleration vector both pointing to the right and then (b) changing so the velocity vector points to the right and the acceleration vector points to the left?
Answer:
(a). The speed of car will increases.
(b). The speed of car will decreases.
Explanation:
Given that,
A car is traveling from your left to your right at a constant velocity.
We need to find two actions could the driver take
Using given data
(a). If the velocity and acceleration of car to the right
It means the velocity and acceleration of car is in same direction then the speed of car will increases.
(b). If the velocity to the right and the acceleration to the left
It means the velocity and acceleration of car is in opposite direction then the speed of car will decreases.
Hence, (a). The speed of car will increases.
(b). The speed of car will decreases.
dont skip need help ASAP and pls hurry will give 10 pts + brainliest
Which quality should an experiment have to be replicable and valid?
a.) clearly detailed results
b.) a well-cited research paper
c.) several tested variables
d.) trials conducted in a laboratory
Answer:
C
Explanation:
In order for an experiment to be valid need to be conducted with several tested variables
Answer:
It's A
Explanation:
It makes sense ( please mark me brainliest)
Will the velocity of a book change as it moves across the surface with friction
Friction force is a force that opposes relative motion of two bodies that have contacting surfaces
Yes, the velocity of the book will change as it moves across the surface with friction
Reason:
According to Newton's first law of motion, a body will remain at rest or move with a constant speed in a straight line unless acted on by a force
Friction force, f = Normal reaction, N × Coefficient of friction, μ
A surface with friction has frictional force that opposes the relative motion of an object in surface contact across it
When an object such as a book moves across a surface with friction, the friction force acts on the book having a velocity, opposing the motion of the book, therefore, slowing down the book
Therefore, the velocity of the will change (reduce) as it moves across the surface with friction
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Which planet has a density that is less than the density of liquid water?
Please help
How would you explain 2 m/s/s [1
(1 Point)
Enter your answer
The light rays in the illustration below do not properly focus at the focal point. This problem occurs with
A. all-spherical mirrors
B. all parabolic mirrors
C. only defective spherical mirrors
D. only defective parabolic mirrors
This problem occurs with C. only defective spherical mirrors.
Spherical mirrors can be either concave or convex, depending on their shape. A perfect spherical mirror is one that has a consistent curvature across its surface, which allows all the light rays that strike it to properly converge or diverge and focus at the focal point.
However, a defective spherical mirror is one that does not have a perfect curvature across its surface. This can happen due to manufacturing errors or damage to the mirror. When a spherical mirror is defective, the light rays do not properly focus at the focal point, leading to distorted or blurred images.
On the other hand, parabolic mirrors have a unique shape that allows them to reflect incoming light rays to a single focal point, providing a sharper and clearer image compared to spherical mirrors.
Therefore, the correct answer is C. only defective spherical mirrors, as they are the ones that do not properly focus the light rays at the focal point.
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You pull two blocks connected by a lightweight string across a horizontal table. Block 1 has a mass of 1.00 kg, and block 2 has a mass of 2.00 kg. There is negligible friction between the blocks and the table. The string will break if the tension is greater than 6.00 N. What is the maximum pull that you can apply to block 1 without breaking the string?
Suppose Person A runs off the edge of the cliff at 2 m/s and Person B runs off the edge at 1 m/s. Which will hit the ground farther from the base of the cliff?
Answer:
Person A will hit a distance fatherExplanation:
Based on the fact that the velocity of person A is more than that of person B, that is from the question, person A has a velocity of 2m/s and person B has a velocity of 1m/s, this clearly shows that person A has the tendency to hit a distance farther from the cliff than person B.
Biodiesel is a type of fuel that can be made from animal fat. During production, animal fats and alcohol chemically react to produce fuel. Biodiesel may be used as an energy source in vehicles. Which conclusion is best supported by the information? Biodiesel is not considered a renewable energy source because it is used in vehicles. Biodiesel is considered a renewable energy source because it is used in vehicles. Biodiesel is not considered a renewable energy source because it is made with animal fat. Biodiesel is considered a renewable energy source because it is made with animal fat.
Answer:
Biodiesel is considered a renewable energy source because it is made with animal fat
Explanation:
Biodiesel is a fuel generated from animal fats, vegetable fats, using a catalyst for chemical formulation of biodisel.
It is a renewable source of fuel, as it can be replenished (renewed) easily & in shorter time, since it is made of animal fats & vegetable fats. Unlike non renewable fuels which take long periods to replenish (renew), like fossil fuels.
So, Biodiesel is considered a renewable energy source because it is made with animal fat
Answer: D
Explanation: Took the test
Describe what an aye of a storm does and look like?
Answer:
They are found at the center and are between 20-50km in diameter. ... The coriolis force deflects the wind slightly away from the center, causing the wind to rotate around the center of the hurricane (the eye wall), leaving the exact center (the eye) calm.
Explanation:
I used google!
Hope this helps :D
Which sentence describes Newton's first law?
Answer:
Options?
Explanation:
Answer:
Unbalanced forces cause in object to move. (apex)
Explanation:
A medical cyclotron used in the production of medical isotopes accelerates protons to 6.5 MeV . The magnetic field in the cyclotron is 1.4 T . Part A What is the diameter of the largest orbit, just before the protons exit the cyclotron? Express your answer with the appropriate units. d d = nothing nothing SubmitRequest Answer Part B A proton exits the cyclotron 1.0 ms after starting its spiral trajectory in the center of the cyclotron. How many orbits does the proton complete during this 1.0 ms ? N N = nothing orbits SubmitRequest Answer Provide Feedback Next
Answer:
a
The largest diameter is [tex]d = 0.523 \ m [/tex]
b
The number of revolution is [tex]n = 2.132 *10^{4}[/tex]
Explanation:
From the question we are told that
The kinetic energy of the electron is [tex]K = 6.5 MeV = 6.5 *10^6 * 1.60 *10^{-19} = 1.04 *10^{-12} \ J[/tex]
The magnetic field is [tex]B = 1.4 \ T[/tex]
The time is [tex]t = 1 ms = 1*0^{-3} \ s[/tex]
Generally the kinetic energy of the proton is mathematically represented as
[tex]KE = \frac{1}{2} * m * v^2[/tex]
Here m is the mass of the proton with a value [tex]m = 1.672 *10^{-27} \ kg[/tex]
=> [tex]v = \sqrt{ \frac{2 * K }{ m} }[/tex]
=> [tex]v = \sqrt{ \frac{2 * 1.04 *10^{-12} }{ 1.672 *10^{-27}} }[/tex]
=> [tex]v = 3.5271 * 10^{7} \ m/s [/tex]
Generally the radius of the largest orbit is mathematically represented as
[tex]r = \frac{ m * v}{ B * e}[/tex]
Here e is the charge on a proton with the value [tex]e = 1.60 *10^{-19} \ C[/tex]
[tex]r = \frac{ 1.672 *10^{-27} * 3.5271 * 10^{7} }{ 1.4 * 1.60 *10^{-19} }[/tex]
=> [tex]r = 0.261 \ m [/tex]
Generally the diameter is
[tex]d = 2 * r[/tex]
=> [tex]d = 2 * 0.261[/tex]
=> [tex]d = 0.523 \ m [/tex]
Gnerally the period of revolution round the orbit is mathematically represented as
[tex]T = \frac{2 \pi * m }{B * e}[/tex]
=> [tex]T = \frac{2 * 3.142 * 1.672 *10^{-27} }{1.4 * 1.60 *10^{-19}}[/tex]
=> [tex]T = 4.691 *10^{-8} \ s [/tex]
Generally the number of revolution is mathematically represented as
[tex]n = \frac{t}{T}[/tex]
[tex]n = \frac{1*10^{-3}}{4.691 *10^{-8} }[/tex]
[tex]n = 2.132 *10^{4}[/tex]
Pls help I’m being timed!!
The diagram shows the setup for an experiment involving a 1000 ml beaker, filled with 500 mL of water, sitting on a burner.
1000 ml
500 ml
Bumer
Which best describes the molecular motion of the water particles as the bumer supplies heat?
O A. The molecular motion will increase as less thermal energy is absorbed.
O B. The molecular motion will increase as more thermal energy is absorbed.
O C. The molecular motion will decrease as less thermal energy is absorbed.
O D. The molecular motion will decrease as more thermal energy is absorbed.
Answer:
B
Explanation:
Heat increase molecular motion
Answer:
B
Explanation:
The more motion there is in the molecules, the more thermal energy is absorbed.
If toy weighs 19.6 newtons on earth, what is the mass of the toy?
Answer:
About 199.864 grams, 4.406 lbs.
Explanation:
can someone please help asap!!! tysm
the answer is 0m/s२.
Explanation:
Because when the object is changing position at a constant velocity,the acceleration is 0m/s२.
I hope it'll help u.
Why isn’t it possible to measure the thermal energy of a substance using a thermometer
Answer:
This is because a thermometer is only meant for measuring temperature and temperature is not a measure of thermal energy
Explanation:
The reason is because a thermometer is designed and calibrated to measure the temperature of a body.
Although the thermal energy of a body is somehow related to its temperature, the thermal energy of a body is not entirely dependent on the temperature of the body
The thermal energy of a body deals with its heat. While thermal energy basically deals with the amount of heat, temperature deals with the flow from one point to another along the body
So what this means is that since thermometer measures this flow, it cannot be used to ascertain the level of heat ( thermal energy) in the body
Answer:
This is because a thermometer is only meant for measuring temperature and temperature is not a measure of thermal energy
Explanation:
_____ is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force
By definition, Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.
Weight is called the action exerted by the force of gravity on the body.
The mass (amount of matter that a body contains) of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.
The formula that allows you to calculate the weight of any body is:
P = m×g
where:
P = weight measured in N. m = mass measured in kg. g = acceleration of gravity measured in m/s². The acceleration of gravity g is the same for all objects that fall due to gravitational attraction, regardless of their size or composition. For example, as an approximate value on Earth, g = 9.8 m/s².
Then, the weight of an object is the force of gravity on the object, that is, the weight will vary according to the force of gravity that acts on it. So the correct answer is:
Weight is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuring force.
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brainly.com/question/15566515?referrer=searchResults brainly.com/question/15271930?referrer=searchResults brainly.com/question/4735812?referrer=searchResultsWhat is named as improper or wicked projects? Why would these ideas be improper or wicked?
(Federalist Paper No. 10)
Answer:
Faction
Explanation:
I am not sure by the paper is written by James Madison who opposes republican government
if you weigh 637 N on Earth's surface, how much would you weigh on the planet Mars?
Answer:
To get your answer multiply 637N by 10N/kg to get 6370kg
The mass of an object weighing 637 N on earth is 65 kg. The acceleration due to gravity on mars is 3.72 m/s². Then its weight on mars is 241.8 N.
What is gravitational force?The gravitational force is the force by which an object attracts other object into its center of mass. Earth attracts every objects into its surface and that is why we are all standing on the ground and experience a weight.
The acceleration due to gravity is the acceleration to the downward motion by gravitational force for an object. The weight of an object is the sum of its mass and acceleration due to gravity of the planet in which the object is placed.
The acceleration due to gravity of earth = 9.8 m/s²
then mass of person weighing 637 N = 637 N/9.8 m/s² = 65 Kg
acceleration due to gravity of mars = 3.72 m/s²
then weight of the mass 65 kg = 65 kg × 3.72 m/s² = 241.8 N.
Therefore, the person will weight 241.8 N at mars.
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When water (H2O) freezes into ice, some of the properties have changed. What stays the same? identity of the H2O energy of the H2O arrangement of the H2O property of the H2O
Answer:
A: The identity of H2O
Explanation:
Got answer right on EDG
Answer:
identity of the H2O
Explanation:
identity of the H2O
Drag each label to the correct location on the table. Sort the units based on the measurement system they're used in. kilometer milligram inch kelvin Fahrenheit Ounce yard SI System US Customary System
Answer:
The correction is the state of mind being for the Fahrenheit that is calculator from anarchy
Explanation:
Answer:
Si system is :kilo miligram kelvin
us system is: Fahrenheit Ounce yard inch
Explanation:
Suppose the polar bear was running on land instead of swimming. If the polar bear runs at a speed of about 8.3 m/s, how far will it travel in 10.0 hours?
Answer:
298800 m
Explanation:
[tex]v = \frac{d}{t} [/tex]
V=speed
d=distance
t=time
[tex]d = vt[/tex]
Change hours to seconds
It will be 36000s
8.3m/s * 36000s
=298800m
1. A liquid of mass 250g is heated with an electric heater. Its temperature rises from 30°C to 80°C, the specific heat capacity of the liquid is 2000J/kg°C and the power rating of the heater is 500W. For how long was the heater used?
2. A solid metal of mass 2kg is heated using a heater of power 2kW for 5 minutes. Its final temperature becomes 400°C. Find the initial temperature of the metal. Specific heat capacity of the metal=1J/g°C.
Answer:
1) 50 seconds 2) 100°C
Explanation:
(Follows formula of Power=Energy/Time)
1) 500W x X = 2000J/kg°C x .25kg x 50°C
X = 50 seconds.
2) 2000W x 300s = 1000J/kg°C x 2kg x X
X = 300
Initial temperature => 400°C-300°C = 100°C