Newest physics Questions | Wyzant Ask An Expert

05/04/22

PHYSICS Ray Diagrams

I have a few problems to solve about ray diagrams:PART 1:A certain concave, spherical mirror has a focal length of 53.0 cm. If the object is 42 cm high and is situated 155 cm in front of the... more

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Physics

05/04/22

Physic Question #3

By how much does a 66-kg mountain climber stretch her 0.596-cm diameter nylon rope when she hangs 30 m below a rock outcropping? (For nylon, Y=1.35 × 109Pa.) Round your answer to 4 decimal places

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Physics

05/04/22

Physics Question#2

TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 70-kg physicist placed himself and 344 kg of equipment at the top of a 647-m-high antenna to perform gravity... more

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Physics

05/04/22

The “lead” in pencils is a graphite composition with Young’s modulus of approximately 1.0×109 N/m2. Calculate the change in length of the lead in an automatic pencil if you tap it straight into the... more

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Physics

05/04/22

physics and torque

helpDuring a very quick stop, a car decelerates at 6.8 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the... more

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Physics

05/04/22

torque in physics

You have a horizontal grindstone (a disk) that is 93 kg, has a 0.33 m radius, is turning at 86 rpm (in the positive direction), and you press a steel axe against the edge with a force of 21 N in... more

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Physics

05/03/22

Item at position 4 Find the equivalent resistance of a 3.44 ohm, a 6.75 ohm, and a 9.27 ohm resistor sitting in series

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Physics

05/03/22

You pull a 70-kg crate at an angle of 30° above the horizontal. If you pull with a force of 600N and the coefficient of kinetic friction is .4, how far will it move in 3 seconds?

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Physics

05/03/22

If q1 and q2 have the same charge of 60 µC with a magnitude of the force between them is 500 N, what is the distance separated these two charges?

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Physics Science Physical Science

05/03/22

Explain for each of the following cases, whether or not you are likely to be able to see your own reflection in a window

Window glass may be better at transmitting light than reflecting it, but there are certain circumstances where it is very clear that some light is reflected. Explain for each of the following... more

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Physics Science Physical Science

05/03/22

A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?

A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?What is the period of motion?If water waves on the lake are traveling... more

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Physics Science Physical Science

05/03/22

How much time would it take for a ray of light to travel between the two hills?

Galileo tried to measure the speed of light by having two people stand on hills about 5km apart. Eachwould hold a shuttered lantern. The first would open his lantern and when the second saw the... more

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Physics

05/02/22

Rotational motion/angular acceleration

A barrel ride at an amusement parkis turning 2.30 rad/s when it startsto slow down. After making 5.00revolutions, it is rotating at1.11 rad/s. How much time didthat take?(Unit = s)can someone... more

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Physics

05/02/22

Rotational Motion/angular acceleration

A barrel ride at an amusement parkis turning 2.30 rad/s when it startsto slow down. After making 5.00revolutions, it is rotating at1.11 rad/s. How much time didthat take?(Unit = s)can someone... more

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Answers •1

Physics

05/02/22

Rotational motion problems/angular acceleration

A barrel ride at an amusement parkstarts from rest and speeds up to0.520 rev/sec in 7.26 s. What isthe angular acceleration duringthat time?could someone plz answer this thourgly?

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Physics

05/02/22

Physics Equilibrium

A 4.30 kg sign hangs from 2 wires. The left wire exerts a 31.0 N force at 122 degrees. What is the magnitude of the force exerted by the 2nd wire?

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Physics

05/02/22

Acting Normal Force

A 15.0 kg crate sits on a 20.0 kg table, which sits on the floor. What is the normal force acting on the crate?

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Physics

05/02/22

Physics Friction Problem

An 84.7 cross country skier on snow has a coefficient of friction = 0.131. With how much force must he push to move at constant speed?

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Physics

05/02/22

A neutral object

A. is repelled by a negatively or positively charged object.B. is attracted to either positively or a negatively charged object.C. is attracted to positively charged objects only.D.is attracted to... more

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Physics

05/02/22

What is the charged stored by a 15 nF capacitor, if it is connected to a 4.5 V battery

A. 0.3 nCB. 3.33 nCC. 6.75 nCD. 67.5 nC

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Physics

05/02/22

What are the possible reasons why we would use multiple resistors instead of just one resistor with a resistance equal to the equivalent resistance of the circuit?

I. A resistor of the required size is not availableII. Required size are always cheap and availableIII. We need to dissipate the heat generatedIV. We want to minimize the cost of resistorsA. I,... more

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Physics

05/02/22

If the electric field intensity is 5 N/C and the force applied to a conductor is 15 N, what is the charge in the conductor?

A. 75 CB. 7.5 CC. 3 CD. 0.33 C

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Physics

05/02/22

A 20 ohms resistor is powered by a 3 V battery. How much current flows?

A. 0.15 AB. 6.7 AC. 7 AD. 60 A

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Physics

05/02/22

It is anything that keeps the current from flowing

A. resistanceB. currentC. conductorD. voltage

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Physics

05/02/22

What is the voltage across the plate of the capacitor if the capacitance is 5 µF and the charge stored is µC?

A. 175 VB. 7 VC. 3.5 VD. 0.14 V

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PHYSICS Ray Diagrams

Physic Question #3

Physics Question#2

Physics Question

physics and torque

torque in physics

Item at position 4 Find the equivalent resistance of a 3.44 ohm, a 6.75 ohm, and a 9.27 ohm resistor sitting in series

You pull a 70-kg crate at an angle of 30° above the horizontal. If you pull with a force of 600N and the coefficient of kinetic friction is .4, how far will it move in 3 seconds?

If q1 and q2 have the same charge of 60 µC with a magnitude of the force between them is 500 N, what is the distance separated these two charges?

Explain for each of the following cases, whether or not you are likely to be able to see your own reflection in a window

A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?

How much time would it take for a ray of light to travel between the two hills?

Rotational motion/angular acceleration

Rotational Motion/angular acceleration

Rotational motion problems/angular acceleration

Physics Equilibrium

Acting Normal Force

Physics Friction Problem

A neutral object

What is the charged stored by a 15 nF capacitor, if it is connected to a 4.5 V battery

What are the possible reasons why we would use multiple resistors instead of just one resistor with a resistance equal to the equivalent resistance of the circuit?

If the electric field intensity is 5 N/C and the force applied to a conductor is 15 N, what is the charge in the conductor?

A 20 ohms resistor is powered by a 3 V battery. How much current flows?

It is anything that keeps the current from flowing

What is the voltage across the plate of the capacitor if the capacitance is 5 µF and the charge stored is µC?

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