3 years ago

What is gravitational potential energy?

Physics

1 answer:

Kay [80]3 years ago

4 0

Answer:

D). energy resulting from the attraction between two masses.

Explanation:

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In the name of love~

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3 years ago

20 kg who is running at a speed of 4.0 m/s jumps onto a stationary sled of mass 5.0 kg on a frozen lake. the speed at which the

Step2247 [10]

Here we can use momentum conservation as there is no external force on sled and child while he jump on sled

by momentum conservation equation

$m_1v_{1i} + m_2v_{2i} = m_1v_{1f} + m_2v{2f}$

$20*4 + 5*0 = 20*v + 5 *v$

since sled and child both moves with same speed so here they both will have same final speed "v"

by solving above equation we will have

25 v = 80

v = 3.2 m/s

So they will move together with speed 3.2 m/s

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3 years ago

Which color had shortest wavelength

IgorLugansk [536]

the color violet has the shortest wavelength!

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4 years ago

For a science project, Janet performs four experiments that are supposed to show a chemical reaction. She displays her results i

mixas84 [53]

number 4 should be no

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4 years ago

A fisherman fishing from a pier observes that the float on his line bobs up and down, taking 2.4 s to move from its highest to i

mars1129 [50]

Answer:

(c) 10m/s

Explanation:

to find the speed of the waves you can use the following formula:

$v=\frac{\lambda}{T}$

λ: wavelength of the wave

T: period

the wavelength is the distance between crests = 48m

the period is the time of a complete oscillation of the wave. In this case you have that the float takes 2.4 s to go from its highest to the lowest point. The period will be twice that time:

T = 2(2.4s)=4.8s

by replacing you obtain:

$v=\frac{48m}{4.8s}=10\frac{m}{s}$

the answer is (c) 10m/s

4 0

3 years ago