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Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 148.1 seconds (2 minutes and 28.1 seconds), while Jill, the faster swimmer, covers ten lengths in the same time interval. Discover the Jack average speed and average velocity and Jill average velocity and average speed.
question1the sound level measured in a room by a person watching a movie on a home theatre system varies from 65 db
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
An alpha particle is fixed at the origin of coordinates. A neutral sodium atom is fixed at the position e-6 m. ( Be sure to show all of your work and reasoning in your solutions to this problem.)
Bone has a Young's modulus of about 1.80*1010 Pa. Under compression, it can withstand a stress of about 1.55*108 Pa before breaking. Suppose that a femur (thigh-bone) is 0.44 m long, and Compute the amount of compression this bone can withstand befor..
Electrons accelerated by a potential difference of 12.3 V passthrough a gas of hydrogen atoms at room temperature. What wavelengths of light will be emitted
A wire has a diameter of1.7 mm and length of 1.3 m. If it's resistance is 15 m(Ohms), What is the restivity of the metal from which it is made
Two converging lens with a focal lengths of 10 cm are separated by 10 cm. What is the position of the final image
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. Assume that air friction will shorten the range by 34.1%. How far will the projectile travel in the horizontal direction, R?
The boiling point of liquid nitrogen is 77.3 K at atmospheric pressure. What is this temperature on the Celsius scale? What is this temperature on the Fahrenheit scale
Water is well mixed in a 1m3 vessel. A stirrer introduces 300W of power into the vessel. determine what is the temperature of the outlet liquid
A neutron of initial kinetic energy (Eini) scatters elastically from a target nucleus which is initiallt at rest. Find the maximum and average fractional kinetic energy loss F=1-(Efinal/Einitial)
A 0.400 {\rm kg} glider is moving to the right on a frictionless, horizontal air track with a speed of 0.850 {\rm m}/{\rm s} when it makes a head-on collision with a stationary 0.150 {\rm kg} glider, Find the final kinetic energy of second glider
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