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Q. Two bars of identical mass are at 30 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J / (kg • C°). While identical amounts of heat are supplied to each, the glass bar reaches a temperature of 92 °C, while the other bar reaches 268.0 °C. What is the specific heat capacity of other substance?
A girl rides the escalator that moves foward at a constant speed. As the girl raises, how do her gravitational energy and kinetic energy change.
While rearranging a dorm room, a student does 276 J of work in moving a desk 1.7 m. What was the magnitude of applied horizontal force.
how long does it take the boat to make a round trip consisting.
Two particles with masses m and 3m are moving toward each other along the x axis with the similar initial speeds vi. Particle m is traveling to the left, while particle 3m is traveling to the right.
An object-spring system oscillates with amplitude of 3.00cm. If the spring constant is 205 N/m and object has a mass of 0.50 kg, determine each of the following values.
Determine the vertical component. when would a microphone at the other end first detect a disturbance.
The inside of the cylindrical can shown above has cross-sectional area 0.005 m^2 and length 0.15 m. The can is filled with an ideal gas and covered with the loose cap. The gas is heated to 363K and some is allowed to escape from the can so that re..
The expression found in part (d) is a cubic equation. There are standard algebraic solutions to this type of equation, but it is sometime quicker and easier to use other methods. explain a way to get a reasonably accurate estimate of v (say, to th..
A 60 (g} tennis ball with an initial speed of 32 {m/s} hits a wall and rebounds with the same speed. The figure shows the force of the wall on the ball throughout the collision.
Two 9cm diameter charged disks face each other, 25cm apart. Both disks are charged to - 80 nC.
A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
A car carrying a 77-kg test dummy crashed into a wall at 27m/s and is brought to rest in 0.1 s. demonstrate that the average force exerted by the seat belt on the dummy is 18,760N.
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