12,762 Answered Questions for the topic physics

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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Physics

04/29/22

Physics question
A bomb initially at rest on a smooth, horizontal surface is exploded into three pieces. Two pieces fly off horizontally at 55.4angle to each other, a 2.50 kg piece at 22.0 m/s and a 3.20 kg piece... more
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Physics

04/29/22

Physics energy question
An electric motor, rated at 45.0 kW with an efficiency of 0.79, provides power while lifting a 1200 kg elevator. The motor can lift eight passengers (at constant speed) to a height of 35.0 m in... more
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Physics

04/29/22

Calculate the (a) Total Range, (b)Total time of flight and (c) Maximum height reached by the projectile
A projectile was launched with an initial velocity of 4 ms from a height of 8 meters at an angle of 40-degrees from the horizontal. Calculate the (a) Total Range, (b)Total time of flight and (c)... more
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Physics

04/29/22

determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 19.0g
the 20-g centrifuge at nasa's ames research center in mountain view, california, is a horizontal, cylindrical tube 58 ft long and is represented in the figure below. assume an astronaut in training... more
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04/29/22

Physics impulse and momentum question
A Figure skater of mass 70kg is gliding at a velocity of 3.5 m/s [E]. Their skating partner, of mass 45 kg, skates at a velocity of 4.2 m/s [N] when they jump into the first skater’s arms.... more
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Physics Science

04/29/22

PHYSICS DOUBT -
We know why the sky is blue, that's because the atmosphere contains particles that scatter the blue light, making the sky blue. But at night, why is the sky not blue or any other colour in the... more
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Physics

04/29/22

Please help me T-T.
Show complete solutionA golf ball was hit and projected at an angle of 60˚ with the horizontal. If the initial velocity of aball was 50 m/s (neglecting air friction).a. Calculate the vertical... more
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Physics Ap Physics

04/28/22

What is the maximum speed?
A mass and spring system consists of a 2.5 kg mass attached to a 12.5 N/m spring. The system is pulled to a position that is 1.6 cm from the equilibrium and released from rest. What is the maximum... more
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