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Suppose that the amount of heat removed when 1.6 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze?
A photographer in a helicopter ascending vertically at a constant rate of 10.5 accidentally drops a camera out the window when the helicopter is 64.0 above the ground, What will its speed be when it hits
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What must be the tension in the wire if it is to take .80 seconds for a pulse to travel along the wire from one pole to the other.
The North Star (Polaris) is a distance 431 ly away and radiates energy in the form of light at a rate of 8.6 x 1029 W. What is the intensity of this light at the Earth
q1. a traveller pulls on a suitcase strap at an angle of 35deg above the horizontal. if 424 j of work is done by the
On an essentially frictionless, horizontal ice rink, a skater moving at 6.0m/s encounters a rough patch, Use the work-energy theorem to find the length of this rough patch.
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.565 m from the axis of rotation of the stool. What is the initial angular momentum of the system
When two capacitors are connected in series the equivalent capacitor is 120uF. What are the individual values of each capacitor
Some good estimates about the human body can be made if it is assumed that we are made mostly of water. estimate the number of water molecules in that person
q1. while a roofer is working on a roof that slants at 39.0 degrees above the horizontal he accidentally nudges his
A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15.0 m/s due north relative to the water. Illustrate what is the velocity of the boat relative to shore?
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