The atomic number of an element is found by counting the

An object falls freely from rest near the surface of the Earth. What is the speed of the object when it has fallen 4.9 meters from its rest position? a) 4.9m/s b) 96 m/s c) 9.8 m/s d) 24m/s I know that it is letter "c" but I don't know why.

How can people influence chemical weathering

How long does water evaporation take? What factors influence it?

A high-speed sander has a disk of radius 4.71 cm that rotates about its axis at a constant rate of 1547 rev/min. Determine the angular speed of the disk. Answer in units of rad/s.

Which statement is true about acceleration? A. it is the rate of change of speed per unit time B. it is the rate of change of displacement per unit time C. it is the rate of change of velocity per unit time D.

How much heat is released when a 10 gram piece of aluminum foil is taken out of the oven and cools from 50 10 c

What career has to do with one of these listed ... fossil fuels, nuclear energy, biomass, hydropower, solar energy, geothermal energy, or wind energy.

Marcus tells Sabrina that for the last few months, he has not been able to detect moderate heat or cold with his fingertips. Which type of nerves are likely damaged?

What is gravity and what are the two factors that determine its strengeth

What is the first thing to check when a refrigerator stops working?