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A wave pulse travels along a string at speed of 200 cm/s what will speed be if: string's tension is doubled? Strings mass is quadrupled (length unchanged) stings length is quadrupled (mass unchanged) strings mass and length are both quadrupled? Please show formulas used
A 2.5 kg piece of the same metal, intitally at a temperature of 190°C is dropped into the water. If the water temperature rises from 16.0°C to 17.8°C, calculate the specific heat of the metal.
A long solenoid with 10.0 turns /cm and a radius of 7.00cm carries a current of 20.0 mA. What is the magnitude of the magnetic field there
How much water must be displaced to float a cubical block of wood (density 655 kg/m^3) that is 15.0 cm on a side
A heart pacemaker fires 79 times a minute, each time a 26.0-nF capacitor is charged (by a battery in series with a resistor) to 0.632 of its full voltage. Determine what is the value of the resistance
question1the sound level measured in a room by a person watching a movie on a home theatre system varies from 65 db
In a ballistics test, a 25.00 g bullet travelling horizontally at 1300m/s goes through a 20.00 cm thick 450 kg stationary target and emerges with a speed of 800m/s. The target is free to slide on a smooth horizontal surface. How long is the bullet..
Water flows at the rate of 3.21 kg/s through a hose with a diameter of 3.52 centimeter. Find the speed of water in this hose
A 0.75 kg cart has been attached to a spring. The cart is moved to the right by 2.0 cm. What is the elastic potential energy stored in the spring
A spaceship is moving toward earth at .6c. It fires arocket away from the earth at .4c relative to the spaceship. What is the velocity of the rocket relative to the earth
steam at 75kpa and 13 percent quality is contained in a spring-loaded piston cylinder device with an initial volume of
A spacecraft has a nonrelativistic (or classical) momentum whose magnitude is 1.8×1014 kg·m/s. Find the relativistic momentum of the spacecraft
Two block of mass M = 30 kg and m = 10 kg slide without friction down the sides of a hemispherical bowl. They each start simultaneously from rest at the lip of the bowl, a height h = 6.0 m above the bottom of the bowl.
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