Compared with a car moving at some original speed, how much work must the brakes of a car supply to stop a car that is moving twice as fast.

Q2. In a 4x100 m relay race, total track length is 200m and time taken by one particular group i s 50.2 s. What is the average speed and average velocity of that group?

The voltage (or electric potential) of battery determines a. how much net electric charge is in the battery b. how much work the battery can do on an electric charge c. how much electric field is around

A cannonball and a marble roll smoothly from rest down an incline. Is the cannonball's (a) time to the bottom and (b) translational kinetic energy at the bottom more than, less than, or the same as the marble's?

The period T of a simple pendulum is expressed by: √ where 'l' is the length of the pendulum and 'g' is the acceleration due to gravity. Show that the formula is dimensionally consistent

An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. the gopher manages to break free at a height of 12 m.

If the Coast Guard warns of a giant wave of water approaching the shore as a result of a major earthquake, they are warning of a. an aftershock. b. liquefaction. c. a tsunami. d. landslides.

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color