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Physics B Physics

05/16/19

DVRs only record analog signals.

I think it’s false but I gotta change the sentence to make it true.

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Physics B Science Physics Act Science

05/10/19

A 57-gram tennis ball moving at 70 miles per hour is hit with a 110-gram tennis racquet moving at 60 miles per hour. Which statement best

A 57-gram tennis ball moving at 70 miles per hour is hit with a 110-gram tennis racquet moving at 60 miles per hour. Which statement best compares the total amounts of mass and energy before and... more

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Physics B Science Physics Physical Science

05/10/19

A student places a magnetic compass near an insulated copper wire with electric current moving through it. He notices that the compass needle no longer points north.

22.A student places a magnetic compass near an insulated copper wire with electric current moving through it. He notices that the compass needle no longer points north.Which of the following best... more

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Physics B Science Physics Physical Science

05/10/19

A student calculates the potential energy of a roller coaster at the top of a hill.

16.A student calculates the potential energy of a roller coaster at the top of a hill. Then, she uses the kinetic energy equation to calculate the roller coaster's energy as it reaches the bottom... more

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Physics B Science Physics Physical Science

05/10/19

Given the law of conservation of energy, what best explains why heat may be absorbed during a chemical reaction?

4.Given the law of conservation of energy, what best explains why heat may be absorbed during a chemical reaction?A. The energy of the reactants is less than the energy of the products.B. Chemical... more

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Physics B Physics Physics C

04/08/19

Physics car power question

A car is moving at 24.5 m/s and is being pushed by a force of 325 Newtons. How much power is being delivered to the car?

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Physics B Physics Physics C

04/08/19

Physics bullet question

A bullet has a mass of 20 grams and is traveling at 275 m/s. It passes completely through a wooden block and emerges with a velocity of 130 m/s. If the block is 1.2 kg in mass, what is the... more

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Physics B Physics Physics C

04/08/19

Physics RPM question

A jet engine’s turbine blades are turning at a rate of 32,500 RPM. After 20 seconds the blades are turning at 53,450 RPM. What is the angular acceleration?

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Physics B Physics Physics C

04/08/19

Physics baseball question

A 2.35 Kg baseball approaches a batter with a speed of 30 m/sec. The bat makes contact with the ball for 0.082 seconds. What is the average force that was applied by the bat if the ball moves... more

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Physics B Physics Physics C

04/08/19

Physics velocity question

An incline plane has an angle of 56 degrees and a coefficient of kinetic friction of 0.25 with a 10-Kg mass sliding down the incline. The initial velocity down the plane is 5 m/s and the mass... more

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Physics B Physics Physics C

04/08/19

Physics bullet collision question

A 5.65-g bullet is moving horizontally with a velocity of +354 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks... more

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Physics B Physics Physics C

04/08/19

Physics mine car question

A mine car (mass=390 kg) rolls at a speed of 0.50 m/s on a horizontal track, as the drawing shows. A 240-kg chunk of coal has a speed of 1.2 m/s when it leaves the chute. Determine the speed of the... more

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Physics B Physics Physics C

04/08/19

Physics cannon question

A cannon of mass 6.66 x 103 kg is rigidly bolted to the earth so it can recoil only by a negligible amount. The cannon fires a 74.0-kg shell horizontally with an initial velocity of 590 m/s.... more

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Physics B Physics Physics C

04/08/19

Physics block and bullet question

To view an interactive solution to a problem that is similar to this one, select Interactive Solution 7.24. A 0.00579-kg bullet is fired straight up at a falling wooden block that has a mass of... more

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Physics B Physics Physics C

04/01/19

Physics earth radii question

How much would a 100-kg object weigh at two earth’s radii above the earth’s surface?I’m thinking it would mass times gravity, and then divide by 4 because the square of 1/2 is 1/4 for two earth... more

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Physics B Physics Physics C

03/21/19

Physics inclined plane question

An inclined plane is slowly lifted and has a mass of 10-kg resting on it. At exactly 34 degrees, the mass breaks loose and starts to slide down the plane. What is the coefficient of friction? Is... more

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Physics B Physics Physics C

03/21/19

Physics deep space question

In deep space, a kilogram of mass:a) Weighs 9.8 Newtonsb) Has zero massc) Has no inertiad) Has no weight

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Physics B Physics Physics C

03/21/19

Physics acceleration and tension question

A 10-kg mass is laying flat on a table with a string attached that runs over the edge of the table via a pulley. You have a 20-kg mass attached to the string that is hanging off the table. The... more

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Physics B Physics Physics C

03/21/19

Physics box of books question

You have a box of books on the floor that weighs 450 Newtons. You attach a rope to the box at an angle of 45 degrees above the horizontal. If the coefficient of kinetic friction is 0.15 and the... more

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Physics B Physics Physics C

03/21/19

Physics space station question

A space station has a diameter of 340 meters and the occupants who are at the other rim have an acceleration of 6.2 m/s^2. What is the angular velocity of the station?

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Physics B Physics Physics C

03/21/19

Physics elevator question

An elevator has an upward acceleration of 3.2 m/s^2. How much does an occupant of mass 80 kg weigh in Newtons while riding in the elevator?

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Physics B Physics Physics C

03/21/19

Physics rollercoaster question

A rollercoaster is making a loop. At the top you are weightless and the coaster is moving at 20 m/s. What is the radius of the loop?

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Physics B Physics Physics C

03/20/19

Physics force question

You have a box of books on the floor with a total mass of 100-kg. You attach a rope to the box at an angle of 30 degrees above the horizontal. If the coefficient of kinetic friction is .22 between... more

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Physics B Physics Physics C

03/20/19

Physics attraction question

What is the attraction between two spherical masses, one 120,000 kg and the other 400,000 kg if separated by 100 meters?

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Physics B Physics Physics C

03/20/19

Physics acceleration question

A 10-kg block is sitting on an inclined plane. There is a cord attached that goes over the top of the plane and has a 15-kg mass attached via a pulley. The plane is 34 degrees and the coefficient... more

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DVRs only record analog signals.

A 57-gram tennis ball moving at 70 miles per hour is hit with a 110-gram tennis racquet moving at 60 miles per hour. Which statement best

A student places a magnetic compass near an insulated copper wire with electric current moving through it. He notices that the compass needle no longer points north.

A student calculates the potential energy of a roller coaster at the top of a hill.

Given the law of conservation of energy, what best explains why heat may be absorbed during a chemical reaction?

Physics car power question

Physics bullet question

Physics RPM question

Physics baseball question

Physics velocity question

Physics bullet collision question

Physics mine car question

Physics cannon question

Physics block and bullet question

Physics earth radii question

Physics inclined plane question

Physics deep space question

Physics acceleration and tension question

Physics box of books question

Physics space station question

Physics elevator question

Physics rollercoaster question

Physics force question

Physics attraction question

Physics acceleration question

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