A hockey puck slides off the edge of a horizontal platform with an initial velocity of 20 m/s horizontally. The effects of air are negligible. The height of the platform above the ground is 2.0 m
What is the magnitude of the vertical component of the velocity of the puck just before it hits the ground? A) 20 m/s
B) 6.3 m/s
C) 13 m/s
D) 15 m/s
E) 21 m/s
B
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Some superconductors are capable of carrying a very large quantity of current. If the measured current is 3.00 × 10^6 A, how many electrons are moving through the superconductor per second? (e = 1.60 × 10^?19 C)
a. 1.88 b. 4.6E+15 c. 7.1E+19 d. 2.9E+23
The distance from the center of a Ferris wheel to a passenger seat is 12 m. What centripetal acceleration does a passenger experience when the wheel's angular speed is 0.50 rad/s?
a. 17 m/s2 b. 9.0 m/s2 c. 3.0 m/s2 d. 6.0 m/s2
The peak of a body's blackbody radiation curve shifts toward longer wavelength as the temperature of the body increases
Indicate whether the statement is true or false
Single-Slit Diffraction: What principle is responsible for light spreading as it passes through a narrow slit?
A. refraction B. polarization C. diffraction D. dispersion