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guapka [62]
3 years ago
9

Which quantity is the vector? a) weight b) power c) kinetiic energy d) speed

Physics
1 answer:
andreyandreev [35.5K]3 years ago
8 0
The answer is D. Goodluck!
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In which layer of Earth’s interior does convection occur?
Tresset [83]

<u>Answer: </u>

Earth convection occurs at the mantle layer

<u>Explanation: </u>

The movement of less dense material  above the more dense material  is called as convection.  The mantle is the layer that lies between the core and the crust of the earth. The mantle is composed of rocks containing silicon, magnesium, oxygen,  aluminium, iron and other minerals.

The heat energy of the core is transmitted  to the rock in the lower mantle.  This makes the rock with less temperature that lies  in  upper mantle to move down slowly.  Now the rocks that are pushed up  is eventually cooled and again pushed down by the hotter rock  from the lower mantle. This is called as convection in earth’s mantle .

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3 years ago
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A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential
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D correct answer for que
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Holaaaaa........................
Citrus2011 [14]

Answer:

Holaaaaaaaaaaa..............................

Explanation:

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3 years ago
A solar-powered car is traveling at constant speed around a circular track. what happens to the centripetal acceleration of the
anyanavicka [17]
Centripetal acceleration is the acceleration of an object acted upon a force that pulls it toward the center of origin. For constant speed, there is no acceleration, since acceleration is defined as the difference of velocities at an elapsed time. Hence, if speed doubles, then the centripetal acceleration would increase as well.
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3 years ago
A small ball of mass 2.00 kilograms is moving at a velocity 1.50 meters/second. It hits a larger, stationary ball of mass 5.00 k
rewona [7]

The kinetic energy of the small ball before the collision is

                             KE  =  (1/2) (mass) (speed)²

                                     = (1/2) (2 kg) (1.5 m/s)

                                     =    (1 kg)  (2.25 m²/s²)

                                     =        2.25 joules.

Now is a good time to review the Law of Conservation of Energy:

                     Energy is never created or destroyed. 
                     If it seems that some energy disappeared,
                     it actually had to go somewhere.
                     And if it seems like some energy magically appeared,
                     it actually had to come from somewhere.

The small ball has 2.25 joules of kinetic energy before the collision.
If the small ball doesn't have a jet engine on it or a hamster inside,
and does not stop briefly to eat spinach, then there won't be any
more kinetic energy than that after the collision.  The large ball
and the small ball will just have to share the same 2.25 joules.

3 0
3 years ago
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