A hockey puck slides off the edge of a horizontal platform with an initial velocity of 28.0 m/shorizontally in a city where the free-fall acceleration is 9.81 m/s2. The height of the platform above the ground is 2.00 m
What is the angle below the horizontal of the velocity of the puck just before it hits the ground if you ignore the effects of air? A) 77.2°
B) 72.6°
C) 12.8°
D) 12.6°
E) 31.8°
D
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Energy and Mass: An electron-volt is the energy gained by an electron if it is accelerated through a potential difference of one volt. What is the equivalent to an electron-volt in kilograms? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C)
Fill in the blank(s) with the appropriate word(s).
For a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T, where t is time in seconds
If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid, find the radius of the solenoid. A) 0.30 m B) 77 m C) 0.94 m D) 9.0 m
As a radio source, the period of "pulsar Earth" is
A) 30 minutes. B) 23 hours, 56 minutes. C) 24 hours. D) 29.5 days. E) 365.25 days.
Briefly explain why starburst galaxies appear fairly ordinary when they are observed in visible light but extraordinary when they are observed in infrared light
What will be an ideal response?