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3 years ago

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?

Physics

1 answer:

mario62 [17]3 years ago

6 0

Answer: 96.138 J

Explanation:

Use equation for potential gravitational energy : Ep=mGh

Ep1=mGh1

Ep2=mGh2

-------------

Ep1= 3.5*9.81*1.2

Ep1=41.202 J

Ep2=3.5*9.81*4

Ep2=137.34 J

Ep=Ep2-Ep1

Ep=137.34-41.202

Ep= 96.138 J

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3 years ago

What does a Lewis structure diagram represent?

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3 years ago

Read 2 more answers

If 1.34 ✕ 1020 electrons move through a pocket calculator during a full day's operation, how many coulombs of charge moved throu

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Given :

Number of operations move through a pocket calculator during a full day's operation , $n=1.34 \times 10^{20}$ .

To Find :

How many coulombs of charge moved through it .

Solution :

We know , charge in one electron is :

$e^-=-1.6\times 10^{-19}\ coulombs$

So , charge on n electron is :

$C=e^-\times n\\C=-1.6\times 10^{-19}\times 1.34\times 10^{20} \ C\\C=-21.44\ C$

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3 years ago

(a) An object that has a small mass and an object that has a large mass have the same momentum. Which object has the largest kin

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Answer:

A) The smaller object; B) The larger object

Explanation:

A) Lets say the small object is 2 kg and the large one is 6 kg. Lets say they also have 30 kg*m/s of momentum each. The small object would have 15 m/s velocity and the large would have 5 m/s.

Now for kinetic energy(.5*m*v²), the small object is .5*2*15², which is 225 J

The large object is .5*6*5², which is 75 J, so the smaller object has more Kinetic energy. Since velocity is squared, it is more important than how large mass is.

B) Same masses as part A. Lets say the kinetic energy is 45 J for both of them. For the small object, 45=.5*2*v²

.5*2 is 1, so 45/1 is 45. Take the square root and we get v= 6.71 m/s

For the large object, 45=.5*6*v²

.5*6 is 3, so 45/3 is 15. Take the square root and we get v=3.87 m/s

Now we plug the velocities into p=mv

For the small object, p=2*6.71, which gives us p=13.42 kg*m/s

For the large object, p=6*3.87, which gives us p=23.22 kg*m/s

The larger object has the larger momentum.

Hope this helps

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3 years ago

A 7.55 × 1014 hz electromagnetic wave travels in carbon tetrachloride with a speed of 2.05 ×108 m/s. what is the wavelength of t

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Answer:

2.72×10^-7

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2.05×10^8=7.55×10^14 wavelength

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wavelength = 2.72×10^-7

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2 years ago

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?​

what is the difference in gravitation potential energy when a 3.5 of box is raised from a height of 1.2m to a height of 4.0m?