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An 1800 kg car stopped at a traffic light is struck from the real by a 900kg car. The two cars become entangled, moving along the same paths that of the originally moving car. If the smallest car were moving at 20m/s before the collision. What is the velocity of the entangled cars after the collision.
The earth orbits the sun in an approximately circular orbit of radius 1.496 1011 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
A man stands at midpoint between two speakers, that are broadcasting an amplified static hiss uniformly in all directions. The speakers are 30.0m apart and the total power of the sound coming from each speaker is .500W.
A ray of light is incident on the surface of a block of clear ice at an angle of 34.0° with the normal, Find the angle between the reflected and refracted light.
A 70kg person running at an initial speed of 4m/s jumps onto a120kg cart initially at rest. Determine the displacement of the person relative to theground while he is sliding on the cart
176.12 J of energy are transferred to a system in the form of heat while the internal energy decreases by 30.69 J. How much work is done by the system
Use the simulation in the cannon interactive in this section to answer the following questions. (a) Does cannonball's horizontal velocity change as it moves through the air? (b) Does its vertical velocity change? (c) If you enhance the cannonball's h..
A youngster hurls a rock horizontally at a speed of 10 m/s from a bridge 50 m above a river. How long will it take for the rock to hit the water (ignore air-resistance)?
A railroad train is traveling at 29.0 m/s in still air. The frequency of the note emitted by the locomotive whistle is 490 Hz. What is the wavelength of the sound waves in front of the locomotive
A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2, find the volume flow rate Q of the gas
An "energy bar" contains 21g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5km/hr? Express your answer using two significant figures.
A proton and an electron are moving due east in a constant electric field that also points due east. Determine the magnitude of the acceleration of the proton
What is the distance between the sound waves you cause? If you hear the first echo after 5.81 s, what is the distance between you and the point where your voice hit a mountain?
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