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3 years ago

7

a cart has 30J or potential energy at the top of a 20m high hill. Assuming no energy is transformed to another form of energy, h

ow much kinetic energy does the cart have when it is halfway down the hill?

1 answer:

topjm [15]3 years ago

3 0

Answer:

i would say 20J

Explanation:

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olga55 [171]

Force because it’s a barrier to velocity so calculating that makes sense

7 0

2 years ago

What is the mass number of this atom? <br> A.3<br> B.4<br> C.7<br> D.10

vaieri [72.5K]

C. 7
The mass number of this atom is the number of protons and the number of neutrons combined, which in this case would be 3+4 or 7.

Hope this helps.

8 0

2 years ago

Read 2 more answers

20 POINTS! PLZ HELP ME. :-)

VladimirAG [237]

Answer:

A

Explanation:

Because both the elements are non-metals

3 0

2 years ago

A thin metallic spherical shell of radius 0.357 m has a total charge of 5.03 times 10^-6 C placed on it. At the center of the sh

Artyom0805 [142]

Answer:

The electric field is $5.623\times10^{4}\ N/C$

Explanation:

Given that,

Radius = 0.357 m

Charge $Q=5.03\times10^{-6}\ C$

Point charge $q=4.15\times10^{-6}\ C$

Distance = 0.815 m

We need to calculate the total electric field

Using formula of electric field

$E=\dfrac{1}{4\pi\epsilon_{0}}\dfrac{q}{r^2}$

Where, q = point charge

r = distance

Put the value into the formula

$E=\dfrac{9\times10^{9}\times4.15\times10^{-6}}{(0.815)^2}$

$E=5.623\times10^{4}\ N/C$

Hence, The electric field is $5.623\times10^{4}\ N/C$

4 0

2 years ago

A rocket is moving with constant velocity of 2000ms and accelerates uniformly at 10ms. What is the velocity after 5 minutes?

AnnyKZ [126]

The velocity is 300ml in 5 mins

8 0

3 years ago