A ball is thrown upward from the ground with an initial speed of 15.6 m/s; at the same instant, another ball is dropped from a building 20 m high. after how long will the balls be at the same height above the ground?

Examples of buoyancy

A pendulum reaches a height of 0.3 m at the top of its swing. If the bob has a mass of 5 kg, what is the potential energy at the top of its swing? Select one: 14.7) 7.35 J 0.45 J 1.5 J

Two deuterium nuclei, 2 1H, fuse to produce a helium nucleus, 3 2He, and a neutron. A neutral deuterium atom has a mass of 2.014102 u; a neutral helium atom has a mass of 3.016030 u; a neutral hydrogen atom has a mass of 1.

Objects with less density than water will?

When two forces on the same object or equal and opposite these forces are called

What is the low end of the range of surface temperature of white stars

The larger the push, the larger the change in velocity. This is an example of Newton's Second Law of Motion which states that the acceleration an object experiences is

Dr. Halite combined sodium metal with chlorine gas to make sodium chloride (table salt). the chemical reaction used up all of the metal and all of the gas. If Dr.

Which planet, when viewed through a telescope, appears as a reddish ball interrupted by some permanent dark regions that change intensity?

A wave has a wavelength of 10 mm and a frequency of 5 hertz. What is its speed? a. 50 mm/s b. 50 hertz's c. 2 mms d. 0 0.50 mms