Physicsacademic

Stopping distances and severity of crashes: A. Increase as vehicle speed increases B. Are not affected by vehicle speed C. Decrease as vehicle speed increases

Which state of matter has mass and takes up space?

A state function is best described as: A. a function that depends on what route is taken between start and finish. B. a function that is independent of the amount of substance. C. a function that depends only on the starting point and ending point of a process. D. a function that only depends on the end point of a process.

How do you calculate the net force when multiple forces act on an object? A. Multiply all forces B. Take the average of all forces C. Add all forces vectorially D. Subtract all forces

What is Boltzmann's constant in eV?

What evidence from the cathode ray tube experiment supports the claim that electrons have a negative charge? SELECT ALL THAT APPLY A. The cathode ray cast a shadow on the tube. B. The cathode ray bent away from a negatively charged plate. C. The cathode ray bent toward a positively charged plate. D. The cathode ray produced heat that caused a wheel to turn.

How do you calculate tangential velocity?

What is the difference between an elastic collision and an inelastic collision?

Which way does the friction arrow in a Free Body Diagram (FBD) for a moving object point? A. In the direction of motion B. Opposite to the net force C. Left D. Opposite to motion

Explain or demonstrate mathematically how the formula for the critical angle (the angle at which total internal reflection occurs) can be derived from Snell's Law.

What are three things an object with unbalanced forces can do?

Disc brakes work by: A. Stopping the drive axle. B. Pressing outward from a disc, to stop a drum from rotating. C. Stopping a disc inside the transmission. D. Pressing inward, on a disc, to stop it from turning.

What are the advantages of parallel circuits? Check all that apply If one bulb goes out, the other bulbs go out. If one bulb goes out, the other bulbs stay lit. If there is a break in one branch of the circuit, current can still flow through the other branches. Parallel circuits are simple to design and build Parallel circuits are complicated to design and build.

A 15.0 kg box is released on a 32-degree incline and accelerates down the incline at 0.30 m/s². Find the friction force impeding its motion. What is the coefficient of kinetic friction?

Which property of light waves is a measure of the brightness of the light? Select all that apply. a) frequency b) velocity c) amplitude d) wavelength Which property of light waves specifies the color of the light? Select all that apply. a) frequency b) velocity c) amplitude d) wavelength Which property of light is related to the energy of the light? Select all that apply. a) frequency b) velocity c) amplitude d) wavelength

What is the specific heat capacity of zinc if it requires 146 J to raise the temperature of 15 grams of zinc by 25°C?

Describe how mass and inertia are related.

What is the size of one atom? It is estimated that about one trillion (1,000,000,000,000) atoms would fit into a period at the end of this sentence. If all the atoms were carbon atoms of the same size, and if the period had an approximate volume of 0.00000006 cubic centimeters, what would be the approximate size in cubic centimeters of just one atom?

At 15.6 million degrees Celsius, the temperature of the sun's core is high enough for nuclear _____ to occur. (Note: You might want to fill in the blank with an appropriate term like "fusion.")

What is the relationship between period and frequency? Explain and write the equations to support your answer.

What are the units of stress in the U.S. system of units and the SI system of units?

Superman is able to travel from Metropolis to Gotham City in 6.8 minutes, flying at a leisurely pace. If he flew at a speed of 344 meters per second, how far apart are the cities in miles?

A changing space zone is one that is: a) Currently obstructed (closed) and in the process of clearing (open) b) Currently clear (open) and in the process of becoming obstructed (closed) c) One that is not obstructed and provides a clear path of travel d) Both a and b

What makes stopping quickly in a curve more difficult? A. The road surface is more slippery B. Only the rear brake can be used C. Wheels are more likely to lock D. Some traction is needed for cornering

Is boiling water an example of conduction, convection, or radiation?

What examples can you find in your home that demonstrate kinetic and potential energy? Name two examples for each. Kinetic Energy: 1. 2. Potential Energy: 1. 2.

Which of the following statements is not true of vibrations? A. Vibrations involve periodic back-and-forth motions. B. Vibrations can be described in terms of frequency and amplitude. C. Vibrations always result in the production of sound. D. Vibrations can travel through various mediums.

Which is the correct formula to determine density? A. Density = volume/mass B. Density = mass/volume C. Density = volume x mass D. Density = volume x mass / height

Describe the four main types of resistance forces.

Provide examples of similarities and differences between conduction, convection, and radiation.

Which statement defines the heat capacity of a sample? A. The temperature of a given sample. B. The temperature that a given sample can withstand. C. The quantity of heat that is required to raise the sample’s temperature by 1°C (or Kelvin). D. The quantity of heat that is required to raise 1 g of the sample by 1°C (or Kelvin) at a given pressure.

What is the formula for calculating final velocity?

Which of the following is the best example of a scientific law? A. The gravitational force between two objects is related mathematically to their mass and the distance between them. B. If an object is pushed off the edge of a table, it will fall to the ground. C. Gravitational force is the result of the curvature of the fabric of space-time.

Is length an extensive or intensive property of matter?

Temperature is a measure of ____ of the particles in an object. A. the difference between the potential and kinetic energy B. the sum of the potential and kinetic energy C. the average potential energy D. the average kinetic energy

Which of the following is the best definition of energy? A. The ability to generate electricity B. The ability to generate heat C. The ability to do work D. The ability to produce fusion

What is the highest number of G-forces ever survived by a human?

The nucleus of a large atom splits and two smaller atoms are formed. Energy is released in the process. What is the name of this process? A. Fusion B. Fission C. Friction D. Binary multiplication

To calculate the density of an object, you must know two pieces of information. One is the volume of the object. What else do you need to know?

How do you find the wavelength with only the frequency?