A baseball catcher puts on an exhibition by catching a 0.175-kg ball dropped from a helicopter at a height of 89.0 m. What is the speed of the ball just before it hits the catcher's glove 1.00 m above the ground? (g = 9.80 m/s2 and ignore air resistance)
a. 41.5 m/s
b. 0.482 m/s
c. 1 730 m/s
d. 29.4 m/s
e. 42.0 m/s
a
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A uniform magnetic field is directed along the x axis. For what orientation of a flat, rectangular coil is the flux through the rectangle a maximum?
1.It is a maximum in the xy plane. 2.It is a maximum in the xz plane. 3.It is a maximum in the yz plane. 4.The flux has the same nonzero value for all these orientations. 5.The flux is zero in all cases.
Which Apollo mission never made it to the lunar surface?
a. Apollo 11 b. Apollo 12 c. Apollo 13 d. Apollo 14 e. Apollo 15
Refracting Telescope: Which one of the following is normally not a characteristic of a simple two-lens refracting astronomical telescope?
A. The angular size of the final image is larger than that of the object. B. The final image is virtual. C. The objective forms a virtual image. D. The final image is inverted.
Instructions: On occasion, the notation 
will be a shorthand notation for 
.
If 
= [2.5 cm, 80°], i.e., the magnitude and direction of are 2.5 cm and 80°, 
= [3.5 cm, 120°], and 
, what is the direction of 
(to the nearest degree)?
A. 247°
B. 235°
C. 243°
D. 216°
E. 144°