College Physics: Explore and Apply 2nd Edition solutions

College Physics: Explore and Apply 2
What simplifications were used to derive the formula for the period of vibration of an object at the end of a spring and of a simple pendulum?

College Physics: Explore and Apply 2
You are hitting a tennis ball against a wall. The 0.057-kg tennis ball traveling at 25 m/s strikes the wall and rebounds at the same speed. (a) Determine the balls original momentum (magnitude and direction). (b) Determine the balls change in momentum (magnitude and direction). What is your object of

College Physics: Explore and Apply 2
A telescope consisting of a +3.0-cm objective lens and a +0.60-cm eyepiece is used to view an object that is 20 m from the objective lens. (a) What must be the distance between the objective lens and eyepiece to produce a final virtual image 100 cm to the left of the eyepiece? (b) What is the total a

College Physics: Explore and Apply 2
What was the approximate radius of the part of the track where the drivers experienced the 5.5g acceleration? (a) 40 m (b) 80 m (c) 200 m (d) 400 m (e) 1000 m

College Physics: Explore and Apply 2
A pendulum clock is moved from the Mississippi Delta region to the Rocky Mountains. Will the clock run faster or slower in the Rockies? Why? How can it be adjusted to compensate for this change? Describe your assumptions.

College Physics: Explore and Apply 2
If you triple the speed of a particle entering a magnetic field, what happens to the radius of the helix that it makes? Select the correct answer, then describe the possible reasoning that could lead a student to choose each of the other answers. You do not need to agree with that reasoning. (a) It

College Physics: Explore and Apply 2
A 0.62-kg Slinky has 185 coils. When you and your friend stretch the Slinky by exerting a 2.0-N force on its ends, the separation between the adjacent coils is 7 cm. Determine the speed of the transverse wave on the Slinky.

College Physics: Explore and Apply 2
How can the peephole lens in a hotel door have an approximately 180 view? (a) The light moves straight through the lens into the eye. (b) Light from about 908 from the straight-ahead direction is refracted into the observers eye if very close to the lens. (c) Light from about 908 from the strai

College Physics: Explore and Apply 2
(a) What is the ratio of the gravitational force that Earth exerts on the Sun in the winter and the force that it exerts in the summer? (b) How many correct answers can you give for part (a)? (Hint: Earths orbit is an ellipse with the Sun located at one of the foci of the ellipse. Think about the

College Physics: Explore and Apply 2
If on a hot summer day you place one bare foot on a hot concrete swimming pool deck and the other bare foot on an adjacent rug at the same temperature as the concrete, the concrete feels hotter. Why?

College Physics: Explore and Apply 2
The mass of a spacecraft is about 480 kg. An engine designed to increase the speed of the spacecraft while in outer space provides 0.09-N thrust at maximum power. By how much does the engine cause the crafts speed to change in 1 week of running at maximum power? Describe any assumptions you made.

College Physics: Explore and Apply 2
A monkey has a cart with a horizontal spring attached to it that she uses for different tricks. In one trick, the monkey sits on the vibrating cart. When the cart reaches its maximum displacement from equilibrium, the monkey picks up a 0.30-kg cantaloupe from a trainer. The mass of the monkey and the

College Physics: Explore and Apply 2
You want to siphon rainwater and melted snow from the cover of an above-ground swimming pool. The cover is 1.4 m above the ground. You have a plastic hose of 1.0-cm radius with one end in the water on the pool cover and the other end on the ground. (a) At what speed does water exit the hose? (b) If y

College Physics: Explore and Apply 2
You throw a small ball upward and notice the time it takes to come back. If you then throw the same ball so that it takes twice as much time to come back, what is true about the motion of the ball the second time? (a) Its initial speed was twice the speed in the first experiment. (b) It traveled an

College Physics: Explore and Apply 2
Compare the magnitude of the normal force of a car seat on you with the magnitude of the force that Earth exerts on you when the car moves across the bottom of a dip in the road. (a) The normal force is more than Earths gravitational force. (b) The normal force is less than Earths gravitational for

College Physics: Explore and Apply 2
Your friend says that the emf induced in a coil supports the changing flux through the coil rather than opposes it. According to your friend, what hap- pens when the magnetic flux increases slightly? (a) The induced current will increase continuously. (b) The coil will get hot and eventually melt.

College Physics: Explore and Apply 2
Calculate the change in intensity level when a sound intensity is increased by a factor of 8, by a factor of 80, and by a factor of 800.

College Physics: Explore and Apply 2
A 5.0-g bullet traveling horizontally at an unknown speed hits and embeds itself in a 0.195-kg block resting on a frictionless table. The block slides into and compresses a 180-N/m spring a distance of 0.10 m before stopping the block and bullet. Determine the initial speed of the bullet. State any a

College Physics: Explore and Apply 2
You exert a 100-N pull on the end of a spring. When you increase the force by 20% to 120 N, the springs length increases 5.0 cm beyond its original stretched position. What is the spring constant of the spring and its original displacement?

College Physics: Explore and Apply 2
Give examples of phenomena that cannot be explained by a particle-bullet model of light. How can a wave model explain these phenomena?