Chemistry
How much heat is required to raise the temperature of 53.5g of water from its melting point to its boiling point?
RPCC
a sample gas has a volume of 200 cubic cm at 25 C and 700 mmHG. If the pressure is reduced to 280 mmHg, what volume would the gas occupy at the same temperature?
Spanish
64. c 65. b 66. a 67. c 68. d 69. a However, if question is asking for the opposite the answer is b
physics
A proton (mass=1.67*10^-27 kg) moves with a velocity of 6.00*10^6 m/sec. Upon colliding with a stationary particle of unknown mass, the proton rebounds upon its own path with a velocity of 4.00*10^6 m/sec. The collision sends the unknown particle forward with a velocety of 2.0...
physics
A proton (mass=1.67*10^-27 kg) moves with a velocity of 6.00*10^6 m/sec. Upon colliding with a stationary particle of unknown mass, the proton rebounds upon its own path with a velocity of 4.00*10^6 m/sec. The collision sends the unknown particle forward with a velocety of 2.0...
Physics
a 20kg box is pulled across ahorizontal surface with aforce of 100nt. The coefficient of friction is .3 (a) find the acceleration. (b) how far will the box move in 5 sec. (c) What is the velocity at this time?
physics
An automobile weighing 15000n crashes into a wall with a velocity of 5m/sec. If the car moves .15m before coming to a stop, what average force does the car exert? on the wall?
physics
A crank .25m long turns a shaft with a diameter of 3cm around which part of a rope is wound. One end of the rope hangs free and supports a weight of 4200nt. (a) What torque does the weight exert on the shaft? (b) WHat torque must be exerted on the crank to keep the system in e...
physics
THe steering wheel of a car has a diameter of 60cm and turns a shaft 4cm in diameter (a) If a 90nt force is needed to turn the wheel, what torque is exerted on the wheel? (b) What force is applied tangentially to the surface of the shaft?
Physics
A crank .25 long turns a shaft with a diameter of 3cm around which part of a rope is wound. One end of the rope hongs free and supports a weight of 4200nt. (a) What torque does the weight exert on the shaft? (b) What torque must be excerted on the crank to keep the system in e...
For Further Reading
