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You put a kettle on to boil and forget about it so that all the water boils away. If initially there was 4.0 × 10-3 m3 of water at 20°C in the kettle, what is the change in entropy of the water once it has all turned to steam?
A rocket moves upward, starting from rest with an acceleration of 33.4 m/s2 for 3.47 s. It runs out of fuel at the end of the 3.47 s but does not stop. How high does it rise above the ground.
An electron is accelerated through a potential difference of 100 V, Find the radius of the circular path in which it will travel
imagine that each person is about the same distance from the center of the field and can generate the same level of sound intensity. How many people are at game.
If the football has a mass of 0.47kg and the time of contact with the ball is 0.021s, what is the force exerted by the ball on the kicker's foot.
Two charges are placed on the x axis. One charge (q1 = +12.5 µC) is at x1 = +3.0 cm and the other (q2 = -13 µC) is at x2 = +9.0 cm. Find the net electric field (magnitude and direction) at the following locations. (a) x = 0 cm magnitude N/C direc..
If a disk rotating at 10 rad/s has a moment of inertia of 0.5 kg m^2. Then another disk with a total mass of 5 kg, What is the angular speed of the new system in units of rad/s
The concepts for finding the change in length of a rod.
Care for the coffee as though it were pure water and neglect energy exchanges with environment.
What is work done by the non-conservative force
A bullet is fired horizontally from a 70 m tall building with a speed of 1100 m ? s. Calculate the vertical component of its velocity
A 2.00 µC charge is experienced by 0.438 N force in an electric field. What is the magnitude of the electric field?
The school bus picks up Brian in front of his house and takes him on a straight-line 3.6 km bus ride to school in the positive direction. He walks home after school. If the front of Brian's house is the origin.
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