If a ball was dropped from 120 meters. if it takes 2 seconds for the ball to fall 60 meters, how long will it take for the ball to reach the ground

All of the following involve waves of electromagnetic energy except A. watching videos on a computer screen B. radios receiving signals through air C. the rumble of thunder during a storm D. sunlight shining on a plant leaf

An unbalanced 16-n force is applied to a 2 kg mass what is the acceleration of the mass

In which of the following eons did the greatest variety of living things exist on earth? a) hadean b) archean c) proterozoic

The "Hangtime" or time spent in the air by a projectile is dependent on

What is the formula for density? Is it mass x volume or mass/volume?

Animals that can hear ultrasonic sounds are the what

If the rock has a mass of 1 kg which is the speed of the rock after it has fallen for two seconds

2 Cars A and B both at rest are to set of from a town to a common destination along the same route. Car A was the first to take off and travelled at 2.

In an experiment to measure the acceleration due to gravity, g two values, 9.72 m/s2 and 9.67 m/s2, as determined. if the accepted value of g is: 9.8 m/s2 find the followings: i) the percentage difference of the measurements?

If momentum is conserved in a collision, does this indicate conclusively that the collision is elastic?