Answer the following statement(s) true (T) or false (F)

1.

2.

3.

4.


1. TRUE
2. FALSE
3. TRUE
4. TRUE

Physics & Space Science

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A 3.0-kg block slides on a rough horizontal surface. A force of 8.0 N acting parallel to the surface is applied to the block. The coefficient of kinetic friction between the block and the surface is 0.15. What is the magnitude of the block's acceleration?

A. 1.9 m/s2 B. 1.2 m/s2 C. 2.3 m/s2 D. 1.5 m/s2 E. 2.9 m/s2

Physics & Space Science

Three long wires parallel to the x axis carry currents as shown. If I = 20 A, what is the magnitude of the magnetic field at the origin?

A. 37 ?T B. 28 ?T C. 19 ?T D. 47 ?T E. 58 ?T

Physics & Space Science

Electromagnetic induction is used in the operation of

a. generators. b. transformers. c. dynamic microphones. d. regenerative braking. e. all of the above.

Physics & Space Science

A slide projector needs to focus the image of a 24.0-mm × 36.0-mm slide onto a square screen 1.50 m on each side. You want to fill the screen as completely as possible without any of the image falling beyond the screen

Due to space constraints in the projector, the slide must be placed 10.5 cm from the lens. (a) What magnification does the projector produce? (b) How far from the lens should the screen be placed? (c) What focal length projector lens is needed?

Physics & Space Science