12,762 Answered Questions for the topic physics

Physics

09/03/24

A hypnotist's watch hanging from a chain swings back and forth every 0.83 s. What is the frequency (in Hz) of its oscillation?
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Physics Math

09/03/24

Physics word problems
A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.5 m/s?; after 4.2 s he enters the main speedway.... more
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Physics Math

09/03/24

Physics word problem
A train has a length of 109 m and starts from rest with a constant acceleration at time t = 0 s. At this instant, a car just reaches the endof the train. The car is moving with a constant velocity.... more
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Physics

09/03/24

Physics word problem
A golf ball is dropped from rest from a height of 8.70 m. It hits the pavement, then bounces back up, rising just 5.60 m before falling back down again. A boy then catches the ball when it is 1.40... more
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Physics

09/01/24

I am struggling to draw the resultant vector using the length and angle of the vector.

On a training flight, a student pilot flies from Lincoln, Nebraska to Clarinda, Iowa, then to St. Joseph, Missouri, and then to Manhattan, Kansas. The directions are shown relative to north: 0∘ is... more
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Physics

08/29/24

Calculating the Electric potential of charges
Three charges are at the vertices of an isosceles triangle. With q = 7.00 nC, the two charges at the base of the triangle are separated by 2.00 cm and each has a charge of -q. The charge q at the... more
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Physics Science

08/29/24

When light reflects on an object. Let’s say the object is red, does the object itself actually do anything? Like physically?
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Physics

08/29/24

An object starts from rest and falls freely. What is the speed of the object at the end of 3.0 seconds? vf=vi+gt A.9.8 m/s B.19.6 m/s C.29.4 m/s D.48.5 m/s
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Physics Chemistry

08/16/24

Physics 1 question on finding density of copper cube
A copper cube with density 8.96 ✕ 103 kg/m3 and mass 20.0 kg at 29.0°C is heated to 150°C.What is the density of the copper cube at this new temperature? (Give your answer to at least three... more
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08/07/24

determine: (a) the angular velocity of the gate immediately after the collision, and (b) the maximum angular displacement of the gate, θ (in radians)
A car trying to break into a secure industrial area collides with a spring-loaded “swing away” security gate. The gate can be modeled as a bar with a torsionalspring mounted at the pivot point.The... more
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08/07/24

Determine the velocities of each vehicle immediately after the collision. Express these in vector form and calculate their respective magnitudes.
Roundabouts are considered safer than typical cross-street intersectionssince they greatly reduce the possibility of “T-bone” collisions, where one vehicleimpacts another at a right angle,... more
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08/07/24

Finding velocity of a free-falling object given a function of time
While a man is repairing an elevator that is at rest, its cablessnap and the elevator begins to free fall at t = 0 seconds. At t = 0.5 seconds,the emergency braking system automatically engages.... more
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Physics

08/05/24

A volleyball is spiked over the net at an angle of 65° below the horizontal with a horizontal acceleration of 1.7 m/s. What is the vertical force of the ball if it weighs 27 N?
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Physics Chemistry

08/03/24

Why is dimensional analysis useful?
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Physics Calculus

08/03/24

How do we derive the moment of inertia of a rod?
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Physics Math Calculus

08/03/24

An object is fired into the air from a height of 250 meters and follows a path given by a vector valued function
r(t) = <75t, 250+55t-4.9t^2>The object is fired from a height of 250 meters, and follows a path given by the vector valued function above.(1) Find the angle that the object was fired from,... more
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Physics

08/02/24

Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of the ultrasound waves themselves. What is the size of the smallest feature observable in human... more
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Physics Math Calculus

08/01/24

A BMX bike jumps off a 10 meter tall ramp with an angle of inclination of 35 degrees, and a speed of 12 m/s.
A BMX bike jumps off a 10 meter tall ramp with an angle of inclination of 35 degrees, as shown below, and a speed of 12 m/s.The landing ramp is 6 m high, and 18.2 m away from the base of the... more
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Physics Math

08/01/24

An object launched at a known speed, but unknown angle
An object is launched from a height of 1,000 m, at a speed of 500 m/s. If we want the object to land 14,000 m downrange, what angle (to two decimals) does the object need to fired at?
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Physics

07/30/24

Action and Reaction from Newton's 3rd Law of motion
An Action and Reaction are equal and opposite pair of forces, yet they do not cancel each other -- explain
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Physics

07/29/24

Unsatisfied with my first lesson
Good morning,I had a physics lesson with a tutor a week ago, but I was not satisfied with the tutor. It says Wyzant will cover the first lesson if I am unsatisfied, but the money has been taken... more
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Physics

07/20/24

An empty parallel plate capacitor is connected between the terminals of a 5.85-V battery and charges up.
An empty parallel plate is connected between the terminals of a 5.84-V battery and charges up. The capacitor is then disconnected from the battery, and the spacing between the capacitor plates is... more
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Physics

07/20/24

One particle has a mass of 4.06x10^-3 kg
One particle has a mass of 4.06 x 10^-3 kg and a charge of +6.27 uC. A second particle has a mass of 7.71 x 10^-3 kg and the same charge. The two particles are initially held in place and then... more
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Physics

07/20/24

Physics homework help
Two identical point charges (q=+9.80 x 10^-6 C) are fixed at opposite corners of a square whose sides have a length of 0.450 m. A test charge (q0= -7.90 x 10^-8 C), with a mass of 8.40 x 10^-8 kg,... more
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Physics

07/20/24

Physics help with this specific question
A particle is uncharged and is thrown vertically upward from ground level with a speed of 25.6 m/s. As a result, it attains a maximum height h. The particle is then given a positive charge +q and... more
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