Answer: .15
Explanation:
K.E. = 1/2 mv2
so m = 2 (K.E.)/v2
so m = 2 (4.8)/64 = .15
the change in velocity over time is called acceleration
Answer:What' the question?
Explanation:
Answer:
Explanation:
Your answer is correct
A 4.0 kg box is released from rest on a frictionless ramp. The box slides from the ramp onto a rough horizontal
surface with a friction coefficient per = 0.50. The box slides 2.0 m horizontally until it stops.
Answer:
0.99932188871837 rounded to 2 significant figures is 1.00m or 1.0m
Explanation:
Step 1 - First calculate the force with the formula: Force = mass × acceleration due to gravity/ (F=mg) {g= 9.8m/s²}
4.0kg × 9.8m/s² = 39.2 Newtons
Step 2 - Then calculate the Kinectic power with the following procedure:
Kinectic force = the coefficient of Kf × mg
0.50μ × 39.2 N = 19.6 Newtons of Kinectic force
Step 3 - Use the equation for Work that is = F×d; use the value of Kf and multiply it by the given distance
W = 19.6 N × 2.0m = 39.2 Joules of energy
↓Remember that the product of Work is Energy (W=E) and that in some cases, we can set W as = kinetic energy ( [tex]\frac{1}{2}[/tex]mass×velocity²) or as = gravitational potential energy (mass *acceleration due to gravity*height)
↑Since the unknown variable that we are told to find is 'height', let's use the second formula to help us solve the problem, where we said that GPE = mgh / PEg = mgh
Step 4 - Find the missing height using the formula, Energy gained from (W = mgh), by rewriting (mgh) to solve for h
39.2 J of E = 4.0kg × (9.8 m/s² × h)
h = [tex]\frac{PEg}{mg}[/tex]
h = [tex]\frac{39.2N}{9.8m/s{2} times 4.0kg}[/tex]
Height of box on-ramp = 1.0m
How does nutrition affect self-concept?
Urgent!
What is the mass of a baseball that has a kinetic energy of 4.8 J and is traveling at 8 m/s?
I think it's 0.6. ∞
Hopefully, it's correct... ∵-∵
The acceleration due to gravity on the moon is 1.6 2. If an astronaut weighs 96 N on
the moon, what is the astronaut's mass on Earth? (2 points)
Answer:
60kg
Explanation:
F= ma
96 = m ×1.6
m= 96/1.6
=60 kg
Are Styrofoam and wood the same temperature, if they are not what are each others temperature
I will give brainliest :)
A cannonball is fired perfectly horizontally from the top of a 210 m tall cliff. It is fired with an initial velocity of 50 m/s. What is the horizontal distance covered by the cannonball before it hits the ground?
Answer:
the horizontal distance covered by the cannonball before it hits the ground is 327.5 m
Explanation:
Given;
height of the cliff, h = 210 m
initial horizontal velocity of the cannonball, Ux = 50 m/s
initial vertical velocity of the cannonball, Uy = 0
The time for the cannonball to reach the ground is calculated as;
[tex]h = u_yt - \frac{1}{2} gt^2\\\\h = 0 - \frac{1}{2} gt^2\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 210}{9.8} }\\\\t = 6.55 \ s[/tex]
The horizontal distance covered by the cannonball before it hits the ground is calculated as;
[tex]X = U_x \times \ t\\\\X = 50 \times \ 6.55\\\\X = 327.5 \ m[/tex]
Therefore, the horizontal distance covered by the cannonball before it hits the ground is 327.5 m
What causes one plate to sink under another
1 Mass
2 Shape
3 Density
Electrons surround the nucleus in orbitals.
True or False
Answer:
true
hope this helps !
What is the kinetic energy of a 4 kg toy car moving at 5 m/s?
Answer:
50 J
Explanation:
<3
A 2.0 kg cart has a momentum of 10.0 kg m/s. What is its velocity?
A.)22 m/s
B.) 2.0 m/s
C.) 5.0 m/s
D.) 20. m/s
Answer:
[tex]\boxed {\boxed {\sf C. \ 5.0 \ m/s}}[/tex]
Explanation:
Momentum is the product of mass and velocity. The formula is:
[tex]p=mv[/tex]
The mass of the cart is 2.0 kilograms. The momentum is 10.0 kg m/s. The velocity is unknown.
[tex]m= 2.0 \ kg \\p= 10.0 \ kg \ m/s[/tex]
Substitute the values into the formula.
[tex]10.0 \ kg \ m/s= (2.0 \ kg ) v[/tex]
We want to solve for the velocity (v). Therefore we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides of the equation by 2.0 kg.
[tex]\frac { 10.0 \ kg \ m/s}{2.0 \ kg}=\frac{(2.0 \ kg )v}{2.0 \ kg}[/tex]
The kilograms will cancel each other out.
[tex]\frac { 10.0 \ m/s}{2.0}=v[/tex]
[tex]5.0 \ m/s=v[/tex]
The velocity is 5 meters per second.
A car moving with an initial velocity of 36 m/s slows down at a constant rate of -2.8 m/s^2 . What distance does the car travel after 3 seconds of deceleration? Remember to include units in your answer! *
Answer:
the distance covered by the car is 95.4 m.
Explanation:
Given;
initial velocity of the car, u = 36 m/s
acceleration of the car, a = -2.8 m/s²
time of motion of the car, t = 3 s
The distance covered by the car is calculated as;
s = ut + ¹/₂at²
s = 36(3) + ¹/₂ x (-2.8)(3)²
s = 108 - 12.6
s = 95.4 m
Therefore, the distance covered by the car is 95.4 m.
Please help
Convert the following distance v time graph velocity graph
Explanation:
for v vs t graph for t=9 to 11,v=15kmph
similarly v2=0,v3=60kmph&v4= -40kmph
A 4.50 kilogram block of wood at 20.0°C is uniformly heated using 90,000. joules of heat. What will be the resulting
temperature of the block? (Cp for wood = 1,800. J/kg-°C)
Answer:
Final temperature, T2 = 31.11°C
Explanation:
Given the following data;
Mass = 4.5kg
Initial temperature = 20°C
Quantity of heat = 90000J
Specific heat capacity = 1,800. J/kg-°C
To find the final temperature;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making dt the subject of formula, we have;
[tex] dt = \frac {Q}{mc} [/tex]
Substituting into the equation, we have;
[tex] dt = \frac {90000}{4.5*1800} [/tex]
[tex] dt = \frac {90000}{8100} [/tex]
dt = 11.11°C
Now, to find the final temperature T2;
But, dt = T2 - T1
Substituting into the equation, we have;
T2 = 11.11 + 20
Final temperature, T2 = 31.11°C
Grade 6-7
1. A diver who climbs up to the 30 meter high dive
board gains 12000J of GPE. What is her mass?
2. A football kicked 11.5 meters in the air gains
63.25J of GPE. What is the mass of the football?
3. Explain, using calculations, why a pole vaulter
who competes on another planet wouldn't have
the same GPE as on Earth.
Answer:
1. m = 40 kg
2. m = 0.55 kg
3. Because of the different values of acceleration due to gravity, g, on the planet and the earth.
Explanation:
1. GPE = 12000 J
h = 30 meters
g = 10 m/[tex]s^{2}[/tex]
But,
GPE = mgh
where: m is the mass, g is the acceleration due to gravity, and h is the height.
12000 = m x 10 x 30
12000 = 300 m
m = [tex]\frac{12000}{300}[/tex]
= 40 kg
The mass of the diver is 40 kg.
2. GPE = 63.25 J
h = 11.5 meters
g = 10 m/[tex]s^{2}[/tex]
GPE = mgh
63.25 = m x 10 x 11.5
63.25 = 115 m
m = [tex]\frac{63.25}{115}[/tex]
= 0.55 kg
The mass of the ball is 0.55 kg.
3. The pole vaulter's GPE on the earth would not be the same as that on another planet due to the variation in the value of the acceleration due to gravity on the two planets, even if he cover the same height.
Given that: m = 60 kg, h = 25 m, determine the GPE on the earth that has g = 10 m/[tex]s^{2}[/tex], and another planet with g = 6.5 m/
Thus, on the earth;
GPE = mgh
= 60 x 10 x 25
= 15000
GPE = 15000 J
On the planet;
GPE = mgh
= 60 x 6.5 x 25
= 9750
GPE = 9750 J
TRUE or FALSE: Feeling "weightless" can be the result of accelerating downwards towards Earth.
A. TRUE
B. FALSE
A man is using a fishing rod to catch fish in figure 1.
Figure 2 is a simplified diagram of figure 1 with the forces and distances.
Calculate the force F, in figure 2.
Answer:
Explanation:
Remark
In general, these 3rd class levers are very inefficient. Because the force distance is smaller than the load distance, you need to pull upward with more force that the weight of the load. So whatever the load is, the force is going to be much greater.
The distances are always measured to the pivot unless you are asked something specific otherwise.
Givens
F = ?
weight = 6N
Force Distance = F*d = 0.5 m
Weight Distance =W*d1 = 2 m
Formula
F*Fd = W*Wd
Solution
F*0.5 = 6 * 2 Divide by 0.5
F = 12/0.5
F = 24 N upwards
4. Magnets with one pole are now routinely made.
True or False
Answer:
False
Explanation:
Benny can’t get the metal lid off a new glass jar of jam. His mother tells him to run hot water carefully over the lid. He does this and is able to unscrew the lid easily. Explain what happened. Use these terms in your answer: Heat, temperature, specific heat, and thermal expansion
Answer:
The cap expanded
Explanation:
As you run hot water (Or any substance) onto something it expands, With coldwater it shrinks. Its like clothes, If a shirt is to small wash it in hot water. If it is to big run it in cold water.
The Cartesian coordinate of a point in the xy plane are (x,y)=(-3.50,-2.50)m. Find the poler coordinate of this point
Answer:
The polar coordinate of [tex]P(x,y) = (-3.50\,m,-2.50\,m)[/tex] is [tex]P (r,\theta) = (4.301\,m, 215.538^{\circ})[/tex].
Explanation:
Given a point in rectangular form, that is [tex]P(x,y) = (x,y)[/tex], its polar form is defined by:
[tex]P(x,y) = (r,\theta)[/tex] (1)
Where:
[tex]r[/tex] - Norm, measured in meters.
[tex]\theta[/tex] - Direction, measured in sexagesimal degrees.
The norm of the point is determined by Pythagorean Theorem:
[tex]r = \sqrt{x^{2}+y^{2}}[/tex] (2)
And direction is calculated by following trigonometric relation:
[tex]\theta = \tan^{-1} \frac{y}{x}[/tex] (3)
If we know that [tex]x = -3.50\,m[/tex] and [tex]y = -2.50\,m[/tex], then the components of coordinates in polar form is:
[tex]r = \sqrt{(-3.50\,m)^{2}+(-2.50\,m)^{2}}[/tex]
[tex]r \approx 4.301\,m[/tex]
Since [tex]x < 0\,m[/tex] and [tex]y < 0\,m[/tex], direction is located at 3rd Quadrant. Given that tangent function has a period of 180º, we find direction by using this formula:
[tex]\theta = 180^{\circ}+\tan^{-1} \left(\frac{-2.50\,m}{-3.50\,m} \right)[/tex]
[tex]\theta \approx 215.538^{\circ}[/tex]
The polar coordinate of [tex]P(x,y) = (-3.50\,m,-2.50\,m)[/tex] is [tex]P (r,\theta) = (4.301\,m, 215.538^{\circ})[/tex].
Explain how the embryological development of different species reveals similarities of organisms that are not evident in the fully formed anatomy.
Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.
Explanation:
Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.
(Have a great day :D)
A car can go from 0m/s to 27 m/s in 4.5 seconds. If a net force of 6,600 N acted on the car , what is its mass? (Hint: solve for acceleration 1st)
Answer:
The answer is 1100kg.
Explanation:
First, you have to find the acceleration using the formula, a = (v-u)/t where v is final speed, u is initial speed and t is time :
[tex]a = \frac{v - u}{t} [/tex]
[tex]a = \frac{27 - 0}{4.5} [/tex]
[tex]a = 6m {s}^{ - 2} [/tex]
Next, you have to apply force formula, F = m×a where m is mass :
[tex]F = m \times a[/tex]
[tex]6600 = m \times 6[/tex]
[tex]m = 6600 \div 6[/tex]
[tex]m = 1100kg[/tex]
Which is one
step that geologists use to find the epicenter of an earthquake?
Answer:
triangulation
Explanation:
using your compass
Answer:
B. they measure the difference between arrival of P waves and S waves.
Explanation:
list sources of noise pollution in your surroundings
-Sounds of Vehicles
-Speakers or TV's at High Volume
-Kitchen Appliances
-Electronic Appliances
-Barking of dogs
Answer:
there are many
Explanation:
includeing planes
loud music
cars
traffic noise
where did the scientific revoluton began
Answer: The scientific revolution began in Europe toward the end of the Renaissance period, and continued through the late 18th century, influencing the intellectual social movement known as the Enlightenment
Explanation:
Two ways I can decrease the force attraction between two charged objects?
Answer: Change distance and charge
Explanation:
Increase the distance between the two particles, and remove charge from one or more of the particles.
Coulomb's Law is:
[tex]F=\frac{kq_1q_2}{r^2 }[/tex]
k being a constant of 8.99 x 10^9 (units)
q1 and q2 being the magnitude of charges
r being the distance between them
What part of the brain is most affected with overuse of cell phones, video games, etc.
an object is horizontally dragged across surface by 100 N force acting parallel to the surface . find out the amount of work done by force in moving the object through distance 8 m
Answer:
Yeah I know you will try to get me this weekend so I can make sure I get a good time and I will talk to you later bye and get back to you
Which statement best describes twins with identical DNA?
O A. The twins will not be similar physically but may have similar behaviors.
OB. The twins will not share any similarities.
c. The twins will be identical physically and behaviorally.
D. The twins will be very similar physically but will have some unique behaviors.
The best description of twins with identical DNA is that the twins will be identical physically and behaviorally. Thus, the correct option is C.
What are the identical DNA twins?Identical twins are also called as the monozygotic twins which result from the fertilization of a single egg by a single sperm, or with the fertilized egg which are then splitting into two individual offspring. Identical twins share the same genomes and are also of the same sex.
Identical twins are also called as monozygotic twins, these result from the fertilization of a single egg by a single sperm, with the fertilized egg which then splitting into two identical cells. Identical twins share the same genomes and are always of the same sex.
Therefore, the correct option is C.
Learn more about DNA here:
https://brainly.com/question/21668095
#SPJ6
At what point does a rubber band have the most elastic potential energy? Explain.
Answer:
You input potential (stored) energy into the rubber band system when you stretched the rubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. ... When the rubber band is released, the potential energy is quickly converted to kinetic (motion) energy.
Explanation: