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Astronauts discover a planet orbiting another star. The mass of the star is 8.10 x 10^30 kg, the mass of the planet is 4.50x10^24 kg. the average distance between the planet and the star is 3.10x10^11 m. what is the force exerted by the star on the planet?
An AC voltage of the form ?V = (85 V) sin (310 t) is applied to a series RLC circuit. If R = 46 ?, C = 29 µF, and L = 0.27 H, find the impedance of the circuit
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
A krypton laser produces a cylindrical red laser beam 2.0 in diam with 2.0 of power. What is the light intensity on a wall 2.5 away from laser.
The speed of a sound in a container of hydrogen is 201K is 1220m/s. what would be the speed of sound if the temperature were raised to 405K? suppose that hydrogen behaves like an ideal gas.
A 1200 kg car is pulling a 500 kg triler along level ground. Friction is negligible. What is the magnitude of the force exerted by the car on the trailer
King Arthur's knights use a catapult to launch a rock from their vantage point on top of the castle wall, How far from the castle wall does the launched rock hit the ground
A plane has an airspeed of 142m/s. A 16.0m/s wind is blowing soutward at the same time as te plane is flying. what is the magnitude of that velocity
A 3 kg toy car with a speed of 5 m/s collides head-on with a 2 kg car traveling in the opposite direction with a speed of 5 m/s, how much kinetic energy is lost
If an electron in a hydrogen atom makes a transition from the n = 7 to the n = 1 state, what is the wavelength of the photon emitted
A spelunker is surveying a cave. She follows a passage that takes her a distance 189 straight west, then a distance 220 in a direction 45 east of south, after that a distance 280 at 30 east of north. After a fourth unmeasured displacement she find..
What is its velocity when it reaches the maximum height.
In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 56 m/s (around 130 mi/h) in a time of 7.2 s
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