Questions from College Physics

Q: Assume there are 100 million passenger cars in the United States and

Assume there are 100 million passenger cars in the United States and that the average fuel consumption is 20 mi/gal of gasoline. If the average distance travelled by each car is 10,000 mi/yr, how much...

Q: (a) How many Earths could fit inside the Sun?

(a) How many Earths could fit inside the Sun? (b) How many of Earth’s Moons could fit inside the Earth?

Q: An average person sneezes about three times per day. Estimate the

An average person sneezes about three times per day. Estimate the worldwide number of sneezes happening in a time interval approximately equal to one sneeze.

Q: The nearest neutron star (a collapsed star made primarily of neutrons

The nearest neutron star (a collapsed star made primarily of neutrons) is about 3.00 x 1018 m away from Earth. Given that the Milky Way galaxy (Fig. P1.81) is roughly a disk of diameter, ~1021 m and t...

Q: The speed of a nerve impulse in the human body is about

The speed of a nerve impulse in the human body is about 100 m/s. If you accidentally stub your toe in the dark, estimate the time it takes the nerve impulse to travel to your brain.

Q: As the tennis ball of Quick Quiz 2.6 travels through

As the tennis ball of Quick Quiz 2.6 travels through the air, does its speed Data from Quick Quiz 2.6 A tennis player on serve tosses a ball straight up. While the ball is in free fall, does its acce...

Q: If the velocity of a particle is zero, can the particle’s

If the velocity of a particle is zero, can the particle’s acceleration be nonzero? Explain.

Q: A person travels by car from one city to another with different

A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 80.0 km/h, 12.0 min at 100 km/h, and 45.0 min at 40.0 km/h and spend...

Q: (a) Can the equations in Table 2.4 be

(a) Can the equations in Table 2.4 be used in a situation where the acceleration varies with time? (b) Can they be used when the acceleration is zero?

Q: Two boats start together and race across a 60-km-

Two boats start together and race across a 60-km-wide lake and back. Boat A goes across at 60 km/h and returns at 60 km/h. Boat B goes across at 30 km/h, and its crew, realizing how far behind it is g...