What causes the granular structure on the sun's photosphere?

Acceleration is the rate of change of velocity. The velocity (positive means down) of a pumpkin thrown off the top of Cheadle hall t seconds after launch is 32t ft/sec (until it hits the ground).

What is the base unit to mass measurement

Can an object have an instantaneous velocity if it has zero acceleration?

What is earths magnetism

If the sun's mass is about average, how many stars are there in the milky way galaxy? the mass of the sun is of the order of 1030 kg and the mass of the milky way galaxy is of the order of 1042 kg.

The standard metric units of measurements for electric field strength are?

What steps are involved in converting potential energy to kinetic energy, or kinetic energy to potential energy?

A 50 Newton box is moved a distance of 12 meters. How much work was done on the box?

An alloy is made of a material of specific gravity 7.87 and another material of specific gravity 4.50. The alloy of mass 750g has an apparent weight of 6.6N when totally immersed in a liquid of specific gravity 0.78.

A ball with a mass of 3 kg moving at 5 m/s collides with a 9 kg ball at rest. After the collision, the impacting (3 kg) ball bounces back at a speed of 2.5 m/s. How fast does the 9 kg ball move and in what direction