Waves
What is the unit for frequency?
Hz, cycles per second, or 1/s
When only one lightbulb blows out, an entire string of decorative lights goes out. The lights in this string must be connected in ______________.
series
A shopping cart slows as it moves along a level floor. Which statement describes the potential energy of the cart?
It stays the same
A charm quark has a charge of approximately _______ Coulombs.
1.07 x 10-19
Joe has a mass of 75 kg and is running down a hill at 8 m/s. Alex has a mass of 80 kg and is running down a hill at 7 m/s. Who has more inertia?
Alex
The energy of a sound wave is most closely related to the wave's _______________.
Amplitude
A 2.0-ohm resistor and a 4.0-ohm resistor are connected in series with a 12-volt battery. If the current through the 2.0-ohm resistor is 2.0 amperes, the current through the 4.0-ohm resistor is _____________________.
2.0 ohms
As an object moves upward at a constant speed, its kinetic energy is _________________.
the same
A charge of 1.12 x 10-18 C is equal to ___________ elementary charges.
7
At a certain location, a gravitational force with a magnitude of 350 newtons acts on a 70.-kilogram astronaut. What is the magnitude of the gravitational field strength at this location?
5.0 m/s2
A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a _____________ frequency
higher
As more resistors are added in series across a battery, the potential drop across each resistor ____________.
Decreases
As a ball falls freely toward the earth, its kinetic energy _________________
A point charge of +3.0 × 10-7 coulomb is placed 2.0 × 10-7 meter from a second point charge of +4.0 × 10-7 coulomb. The magnitude of the electrostatic force between the charges is ___________.
2.7 N
A bowling ball has a mass of 7.25 kg on Earth. What is its mass and weight on the Moon?
7.25 kg, 11.6 N
This is the speed of light in corn oil.
2.04 x 108 m/s
When three 30-ohm resistors are connected in parallel across a 9-volt source, the total current is _________.
0.9 A
Box A has a mass of 10. kilograms and is at rest on a shelf that is 1.5 meters above the floor. Box B has a mass of 20. kilograms and is at rest on a shelf that is 3.0 meters above the floor. Compared to box A, box B has a gravitational potential energy relative to the floor that is __________ times as great.
Four
What is the magnitude of the electrostatic force between two electrons separated by a distance of 1.00 x 10-8 meter?
2.30 x 10-12 N
What is the magnitude of the gravitational force of attraction between two 0.425-kilogram soccer balls when the distance between their centers is 0.500 meter?
4.82 x 10-11 N
The spreading out of a wave after passing through an opening in a barrier is an example of ____________.
diffraction
As the number of resistors in a parallel circuit is increased, what happens to the equivalent resistance of the circuit and total current in the circuit?
Equivalent resistance decreases, total current increases
After a 65-newton weight has fallen freely from rest a vertical distance of 5.3 meters, the kinetic energy of the weight is ________.
If the distance separating an electron and a proton is halved, the magnitude of the electrostatic force between these charged particles will be changed by a factor of _______________.
Four
A 120-newton box is pulled by a 48-newton horizontal force across a horizontal surface at constant velocity. The coefficient of kinetic friction between the box and the horizontal surface is _____________.
0.40