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A spaceship is moving away from Earth at a speed of 0.65c. A light source on the rear of the ship appears blue (? = 450 nm) to passengers on the ship. Which color (what wavelength) would that source appear to an observer on Earth monitoring the receding spaceship?
A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward), What is the horizontal displacement of the rocket when it returns to y=0
A 20.0 kg wagon is being pulled over a level driveway by a horizontally directed pulling force of 140 N. If there is a 100 N friction force opposing its motion, What is the forward acceleration of the wagon
Two ultrasonic sound waves combine and form a beat frequency that is in the range of human hearing for a healthy young person, What is the largest possible value for the frequency of the other ultrasonic wave
Two moles of ideal gas at atmosperic pressure 20 degree celcius is confined to a closed container of volume 44.5 liter. What is the pressure in the container
a car accelerates from 23 ms to 28 ms while travelling a distance of 1.97 m due to a 97800-n net force acting on it.
A simple pendulum is made from a 0.60-m-long string and a small ball attached to its free end. how much time elapses before it attains its greatest speed
A 3500 kg parked car, with brakes off and free to move, What percentage of the kinetic energy is lost in the collision
A patient recovering from surgery is being given fluid intravenously. The fluid has a density of 1040 kg/m3, and 9.54 10-4 m3 of it flows into the patient every five hours. Find the mass flow rate in kg/s
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor, How much charge can the cloud hold before the dielectric strength of the air is exceeded
A point source of light is submerged 2.4 m below the surface of a lake and emits rays in all directions. What is the maximum radius that this circle could have
q1. a ship sets out to sail to a point 128 km due north. an unexpected storm blows the ship to a point 148 km due east
A car is driving 22.7m/s flat ground drives off 42.3 m high cliff. How much time does it take to reach the ground.
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