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Water at temperature 25°C flows from a tap T into a heated container C. The container has a heating element (a resistor R) which is supplied with electrical power, P, that may be varied. The rate of flow of water F = 0.030 litres per minute. The electrical power is sufficient that C the water in the container is boiling. What is the minimum power that must be supplied in the steady state so that the amount of liquid water in R the container neither increases nor decreases with time? You may neglect other losses of heat, such as conduction and radiation from the container to the air.
Two identical small insulating balls are suspended by separate0.25-m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.0 x 10-4 kg. Initiallythe balls are uncharged and hang straight down.
For safety in climbing, a mountaineer uses a nylon rope that is 60 m long and 1.0 cm in diameter. Find its Young's modulus
A 1.5 kg ball is thrown straight up with aninitial speed of 12m/s. What will be the potential energy of the ball when it reaches its max. height
The police at the scene of the accident observed that the point of impact is 120 m from the base of the cliff. Explain how fast was the car traveling when it went over the cliff?
The car collides and becomes stuck to a 5000kg truck travelling west at along South Street at the intersection of South Street and Murdoch Drive. Illustrate what is the final velocity of the vehicles after the collision if the truck was travelling..
Red light (n = 1.520) and violet light (n = 1.538) traveling in air are incident on a slab of crown glass. Both colors enter the glass at the same angle of refraction. The red light has an angle of incidence of 35.96 degrees. What is the angle of ..
A cat is located 4.7 m in front of a concave mirror. The mirror has a radius of 1.6 m. Construct a ray diagram to scale following the steps outlined in the procedure here. Where is the image of the cat
A thin rod of length 0.75m and mass 0.42kg is suspended freelyform one end. It is pulled to one side and then allowed to swinglike a pendulum, how far above that position the center of mass rises
A cube of wood having an edge dimension of 20.0 cm and a density of 650 kg/m3 floats on water. What is the distance from the horizontal top surface of the cube to the water level
The combination of an applied force and a friction force produces a constant total torque of 36.5 N•m on a wheel rotating about a fixed axis. Obtain the magnitude of the torque due to friction
An electron of mass 9.11×10?31 leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the Time to reach the grid
A protein molecule is suspended in a gel, and has 31 excess electrons (hence the protein molecule is negatively charged). If placed in an electric field of 600 N/C, what is the (electric) force on this molecule?
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