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An object takes 2.20 s to fall 5.40 m on a certain planet.
(a) Find the acceleration due to gravity on the planet.
m/s2
(b) Find the planet's mass if its radius is 5250 km.
kg
A spherical blackbody radiator has a temperature of 159°C. Its radius is 0.253 m. what is the net rate of energy radiated from the sphere?
q1. david is driving a steady 21.0 when he passes tina who is sitting in her car at rest. tina begins to accelerate at
How far away can a human eye distinguish two car headlights 1.8 m apart? Consider only diffraction effects and assume an eye pupil diameter of 5.5 mm and a wavelength of 550 nm.
A commuter train passes a passenger platform at a constant speed of 42.9 m/s. The train horn is sounded at its characteristic frequency of 320 Hz. What wavelength is detected by a person on the platform as the train approaches
The pressure in a section of horizontal pipe with a diameter of 2.0 cm is 146 kPa. Water flows through the pipe at 2.80 L/s. what should the diameter of the constricted section be
The average lifetime of a pi meson in its own frame of reference (i.e., the proper lifetime) is 2.6 10-8 s. What distance would it travel
You fly your 15 m spaceship, parallel to the ship's length with a speed of c/3 to your friend. How long is your spaceship as observed by your friend
A 120 V rms voltage at 60 Hz is applied across a 10 uF capacitor and an unknown resistor. what is the value of the resistor
The track for a racing event was designed so that riders jump off the slope at 30 angle, from a height of 5 ft. Determine the maximum height he attains
In uniform circular motion, a particle undergoes motion in a circular path with a constant speed. Which of the following statement is false and why?
You attach a meter stick to an oak tree, such that the top of the meter stick is 2.47 meters above the ground. how high above the ground was the acorn before it fell
A 0.17kg ball is thrown vertically upwards with a velocity of 34m/s at the edge of a 22m cliff. Neglect air resistance. calculate The height to whcih the ball rises above the cliff
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