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a) Calculate the speed of a proton that is accelerated from rest through an electric potential difference of138V.m/sb) Calculate the speed of an electron that is accelerated through the same potential difference.m/s
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
A system gains 3400 J of heat at a constant pressure of 1.36 × 105 Pa, What is the change in the volume of the system
While surveying a cave, a spelunker follows a passage 190{rm m} straight west, then 210{rm m} in a direction 45.0^circ east of south, and then 260{rm m} at 30.0^circ east of north. After a fourth unmeasured displacement, she finds herself back whe..
A rock is thrown with a velocity of 10 m/s @ 45 deg above the horizontal from a bridge 20 m above a river. What is the elapsed total flight time to reach the river
In addition, snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
A 0.030 kg lead bullet hits a steel plate, both initially at 20?C. The bullet melts and splatters on impact. What is the minimum speed the lead bullet must have in order to melt on impact
A football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.16 s). what average force does the punter exert on the ball
Calculate the Q-value of the alpha decay of 211Po. It was found that 211Po can follow an alpha decay to an meta state. The alpha energy in this decay is 7.275 MeV
Two boxes, m1 = 1.0 kg with a coefficient of kinetic friction of 0.10, and m2 = 2.0kg with a coefficient of 0.20, are placed on a plane inclined at 0 = 30o.
An observation satellite orbits the planet at a height of 1000 . What is the projectile's speed as it passes the satellite?
What is the coefficient of static friction
It takes the elevator in a skyscraper 4.1s to reach its cruising speed of 13m/s. A 68kg passenger gets aboard on the ground floor. find the passenger's weight before the elevator starts moving
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