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A small electric immersion heater is used to boil 60.0 g of water for a cup of instant coffee. The heater is labeled 165.0 W, which means that it converts electrical energy to heat at this rate. Calculate the time required to bring this water from 13.5 °C to the boiling point ignoring any heat losses.
The masses of astronauts are monitored during long stays in orbit, such as when visiting a space station. What is the mass of an astronaut who has an oscillation period of 2.00 s when in the chair
Two straight wires run parallel to each other, each carrying a current in the direction shown below. The two wires experience a force in which direction? B) What happens when one of the currents is turned off?
As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. how long must the engines be fired
during a racing event a 110 kg car accelerates from 0 to 29 m/s in 4.3 seconds. what is the net force exerted on the car
A 12 g bullet is stopped in a block of wood (mw = 5.6 kg). What was the original speed of the bullet
A cart of mass (851.8 +- 0.1)g is configured in a setup. The tension in the string is 0.36 N and the cart has a displacement of 40.9cm
A person with a weight of 222 lb stands on two feet with their weight equally distributed between the two shoes, compute the pressure on each shoe independently
A ball is shot from the top of a building with an initial velocity of 20m/s at an angle ? = 42? above the horizontal. What are the x and y components of the initial velocity
A proton is released from rest at the positive plate of a parallel-plate capacitor. What will be the proton's final speed if the experiment is repeated with double the amount of charge on each capacitor plate
A (smooth) rope of length L and mass m is placed above a hole in a table. One end of the rope falls through the hole, Find the mechanical energy lost from the rope as the end of the rope leaves the table
An archer fish spies a meal of a grasshopper sitting on a long stalk of grass at the edge of the pond in which he is swimming. What angle above the horizontal must he spit
The United States uses 1.12×1019J of electrical energy per year. How many kilograms of uranium would have to be mined per year to provide that much 235U
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