Number of valence electrons for calcium?

If you throw a ball upward with an initial speed of 4m/s at 1.5m above the ground, find a. the flying time for this free fall motion, b. the final velocity just before touching the ground, and c. the maximum height with respect to the ground.

What conditions cause glaciers to shrink and recede

The binding energy of a nucleus can be found using

Does exists the friction force in space? If yes, tell an full example

The force of attraction between m1 and m2 is 26 N. What will this force become if m2 is tripled?

Why is plasma called the "fourth state of matter"? I've recently heard that plasma is sometimes referred to as the "fourth state of matter". Why is this? Why is it not the first, second or third?

Which of these would you include ina free body diagram for a bicycle-plus-rider taken together as the bicycle is being pedaled up the hill?

What are two possible uses of genetic engineering

How many joules are expended by a 70 kg man climbing up 6m of stairway? How much work is done if the climbing takes place on the surface of the moon? (Assume that the acceleration due to gravity on the moon's surface is 1.6 m/s2

A baseball flying through the air has kinetic energy because of its motion. true or false?