12,723 Answered Questions for the topic physics

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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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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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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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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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

05/02/22

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

05/01/22

Coal mine Carbon
While exploring a coal mine, scientists found plant fossils which had been preserved by an earthquake in the ceiling of the mine. Samples taken from one of the fossils had carbon‑14 activities... more
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Physics

05/01/22

What is the daughter nucleus (nuclide) produced when At217 undergoes alpha decay? Replace the question marks with the proper integers or symbols.
What is the daughter nucleus (nuclide) produced when  undergoes alpha decay? Replace the question marks with the proper integers or symbols.
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Physics

05/01/22

circular motion
An ultracentrifuge accelerates from rest to 98300 rpm in 1.85 min.ω = 98300 rpmt = 1.85 minl = 9.9 cma) what is the angular acceleration in rad/s2?b) what is the tangential acceleration of a point... more
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Physics

04/30/22

circular motion
this problem confused meA disk with an initial angular velocity ω0 = 3.5 rad/s experiences a constant angular acceleration of α = 8.5 rad/s2 for a time period t = 25 s. Please answer the following... more
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