We have 39.5 g of a particular substance. Its specific heat in solid form is 0.8 J/(g K) and its specific heat in liquid form is 1.4 J/(g K); it's latent heat of melting is 170 J/g. Its initial temperature is 196 and its melting point is 223. We wish to raise its temperature to 297 (where it is a liquid). How much heat is required?
Q: A parallel-plate capacitor is formed of two square metal plates 10cm x 10cm, separated by a 2-mm- th...
A: Capacitance is,
Q: one way to tell if a mosquito is about to sting is to listen for the doppler shift as the mosquito i...
A: The frequency of the source=1050Hz.The frequency heard by the listener =1034Hz. (a)Since the frequen...
Q: A car drives straight off the edge of a cliff that is 58 m high. The police at the scene of the acci...
A: Let ux be the horizontal velocity of the car and uy be the vertical velocity,.The kinematic expressi...
Q: A compact disk rotates at 210 revolutions per minute. What is its angular speed in rad/s?
A: The angular speed is given by,
Q: a bridge across a small stream is made by supporting a 10m long log with a mass of 75kg with ropes t...
A: Let the mass of the log is M and the mass of the child is m. For y direction the torque equation is ...
Q: The current i through a 5.3 H inductor varies with time t as shown by the graph of the figure. The i...
A: Write the expression for the induced emf in a inductor.
Q: n the figure, a nonuniform bar is suspended at rest in a horizontal position by two massless cords a...
A: The expression for the vertical and horizontal component of force,
Q: At the end of a race a runner decelerates from a velocity of 8.00 m/s at a rate of 0.500 m/s2. (a) H...
A: Given,
Q: Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. The f...
A: Law of conservation of momentum is,