A car is moving with a constant speed along a circular track. The car is therefore not accelerating
Indicate whether the statement is true or false
FALSE
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The main application of PEEK is as a(n) _________material for carbon-fiber-reinforced composites in aircraft.
Fill in the blank(s) with the appropriate word(s).
Consider the situation shown below. Object A is a metal sphere with zero net charge, and objects B and C are particles with charges q and -q, respectively. Point P is at the sphere’s center. Answer each question below by choosing one of the arrows to the right of the picture or by choosing answer E. (If you are using the letters on the back cover to display your answer, you can indicate the double-letter choices by pointing to a letter with two fingers.) Which arrow best indicates the direction of the electric field at point P created by particle B?
A. A
B. B
C. C
D. D
E. Zero
F. AA
G. BB
H. CC
I. DD
A current of 4.0 A is maintained in a single circular loop having a circumference of 80 cm. An external magnetic field of 2.0 T is directed so that the angle between the field and the plane of the loop is 20°. Determine the magnitude of the torque exerted on the loop by the magnetic forces acting upon it
a. 0.41 N / m b. 0.14 N / m c. 0.38 N / m d. 0.27 N / m e. 0.77 N / m
A ray of light traveling in a calm pond strikes the surface at an angle of incidence which is 2° larger than the critical angle. This ray will
A. be refracted toward the normal to the surface in the air. B. undergo total internal reflection and not enter the air at all. C. be refracted away from the normal to the surface in the air.