A loud-speaker consists of a cone attached to a current-carrying coil located in a magnetic field. Describe exactly how this system works to deliver sound of a particular frequency (matching the music)...

A loud-speaker consists of a cone attached to a current-carrying coil located in a magnetic field. Describe exactly how this system works to deliver sound of a particular frequency (matching the music)...

A magnet can exert a force on a moving charged particle, but it cannot do work on it (changing its kinetic energy). Why not? (a diagram might help).

Derive F = BIL by starting with a single charge formula F = qvB and recognizing that current is simply I = Q/t.

A 2m crowbar is employed to lift a 200 kg load. What force must a man apply to one end of the crowbar when a stone (acting as a fulcrum) is placed under the crowbar 20 cm away from the end on which...

Using a wheel and axle machine, a force of 100 N applied to the rim of a wheel can lift a load of 80 kg .The diameters of the wheel and axle are 1 m and 80 cm respectively. Determine the actual mechanical...

A 60 kg block slides along the top of a 100 kg block with an acceleration of 2.0 m/s2 when a horizontal force F of 315 N is applied. The 100 kg block sits on a horizontal frictionless surface, but...

A track and field athlete, running on a circular track, completed 15 laps around the track in a total time of 5.3 min. Determine the angular velocity of the athlete. If the athlete...

A 4.0 cm object is 6.0 cm from a convex mirror that has a focal length of 8.0 cm. What is the height of the image produced by the mirror?

Statement : a man slides down the rope with a deceleration a relative to the rope. Acceleration of man with respect it rope is taken as +a and not - a Why is it so, why should we not...

Acceleration is sometimes expressed in multiples of g, where is the acceleration due to Earth's gravity. In a car crash, the car's velocity changes from to in In terms of g, what is the acceleration...

here is the full question: A baseball is hit with a bat. The direction of the ball is completely reversed and its speed is doubled. If the actual contact with the bat lasts what is the ratio of the...

Here is the full question: A girl is a passenger aboard a moving train. The girl has a toy wind-up car that she lets travel down the aisle of the train. From experience, the girl knows that the wind-up...

I just stated physics just need a lil help

this is a subject on atomic and nuclear physics

Please help me understand how to formulate this question and why. The math isn't hard but understand how you set it up is. Thank you in advance

an object with mass m has R distance from the center of the earth. if R=2m, what is the difference between R=2m and 2R?

Please write a question that shows what the main general question pops up when researching or reading about optical illusions. What is a good follow up question on a project about optical illusions...

Degrees as on a protractor

When a circular loop enters a uniform magnetic field perpendicular to its plane with uniform velocity, how is the variation of induced EMF with time?

In a generator (AC or DC), what happens if we use a radial magnetic field, does the induced current become purely DC? If so, is it in use anywhere?

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