A rock and a feather are dropped from the rooftop of a building.

which has more kinetic energy

The initial velocity of a car moving on a straight road is 2.0 m s^-1 and becomes 8.0 m s^-1 after travelling for 2.0 s under constant acceleration. What is the acceleration?

Two bullets have masses of 2.5 g and 6.5 g, respectively. Each is fired with a speed of 42.0m/s. a) What is the kinetic energy of the first bullet? Answer in units of Jb) What is the kinetic energy of the second bullet?

As a wire gets longer, the current through the wire will be reduced for a given voltage. The best explanation for this is that A) the amperage increases. B) the resistance decreases. C) the resistance increases. D) the potential difference decrease

How star properties affect star formation? Provided following are the spectral types of four different main-sequence stars.

What is the molecular geometry of a molecule with four bonding domains and one nonbonding domain?

If there are many forces acting on an object, how can the net force be 0:

What is a planetary nebula? a. leftover gas from a supernova explosion b. the ejected envelope of a giant star surrounding the remnant of a star c. a type of young, medium-mass star d. a planet surrounded by a glowing shell of gas e.

A train is moving 4.82 m/s when it begins to accelerate. After 24.8s it is moving 7.09m/s how far did it move in that time

List three different emotions?

The jet stream flows from east to west across the United States. True False