A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground. At what angle below the horizontal does the ball approach the ground?
A)
35.1°
B)
38.6°
C)
48.0°
D)
40.0°
E)
65.2°
C
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a. 2.5 × 10^4 J b. 1.1 × 10^4 J c. 6.7 × 10^3 J d. 2.9 × 10^3 J e. 7.0 × 10^2 J
EM waves in a vacuum travel at a speed
a. of c. b. varying with their wavelength. c. varying with their intensity. d. of 299,792,458 m/s.
Monochromatic light from a He-Ne laser (? = 632.8 nm) is incident on a diffraction grating containing 5000 lines/cm. Determine the angle of the first-order maximum
a. 18.4° b. 39.2° c. 14.6° d. 27.7° e. 13.9°
If the temperature of 2.000 moles of an ideal gas is increased by 50
C then what is the increase in the total internal energy?
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