4. A boat uses its motor to increase its speed from 5 m/s to 7 m/s. If the boat has a mass of 250 kg, what was the impulse applied by the motor?

the answer would be c

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.