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Q. A toy train with 1.2kg mass is moving at a stright line platform with a velocity 12m/s. It collides another toy train of 0.9kg mass with velocity of 7m/s. If e = 0.8, what is the velocity of each train after the collision.
Q. You want to take a bath with the water temperature at 35.0°C. The water temperature is 38.0°C from the hot water tap and 11.0°C from the cold water tap. You fill the tub with a total of 185 kg of water. How many kilograms of water from the hot water tap do you use?
The flywheel of an engine has a moment of inertia 2.50 about its rotation axis. What constant torque is required to bring it up to the angular speed of 390 in a time of 8.50, starting from rest? What is its last kinetic energy . Discover an angular..
A child and sled with a combined mass of 49.20 kg slide down a frictionless hill that is 7.38 m high. If the sled starts from rest, what is its speed at the bottom of hill.
According to the law of universal gravitation, what will happen to Earth if the Sun were somehow replaced by the black hole of same mass.
A train is travelling up a 4.40 incline at a speed of 3.30 when the last car breaks free and begins to coast without friction. How long does it take for the car to come to rest? How far does the car travel.
A 5 uF capacitor is initially charged to a potential of 16 V. It is then connected in series with a 3.75 mH inductor.
Fairgoers ride a Ferris wheel with a radius of 4.35m, the bottom of which is 1.75m from the ground. The wheel completes one revolution every 30s. A passenger drops his keys when he is three quarters of the way up and at the 10 o'clock position. Wh..
What is magnitude of the angular momentum
What is an average speed for the new trip
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0612 of the original volume and the pressure that is 46 times the original pressure. What is the temperature of the air after the compression.
Pulling down on a rope, you lift a 4.49 kg bucket of water from a well with an acceleration of 1.50 m/s2. What is the tension in the rope.
A sound source emits sounds of frequency 210Hz that travel by still air at 340m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is wavelength of the sound between the source and the listener.
What is acceleration due to gravity
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