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A copper block is removed from a 310 degrees Celsius oven and dropped into 1.20kg of water at 20.5 degrees Celsius. The water quickly reaches 25.5 degrees Celsius and then remains at that temperature. What is the mass of the copper block?
An old-style TV set places 50 kV across two plates of a parallel plate capacitor. An electron is released very close to one plate, find the speed of the electron when it exits the hole in the plate
A 2.0 object is attached to a spring (k=55.6 N/m) that hangs vertically from the ceiling. find the magnitude of the maximum acceleration of the object
The surface temperature of the Sun is about 5800 K. Taking the Sun's radius to be 6.96E+8 m, calculate the power radiated by the sun
A 66 kg rock climber is climbing a so called chimney between two rock slabs, What is her push against the rock
What is corresponding free energy change
A compound microscope has a barrel whose length is 16.3 cm and an eyepiece whose focal length is 1.3 cm. What focal length must the objective have so the angular magnification of the microscope is -250
When an ion accelerates through a potential difference of 2180V , its electric potential energy decreases by 1.40×10-15J What is the charge on the ion
You are designing a digital camera, and want each detector element to have a width equal to the distance between the first zeros of the first zeros of the diffraction-limited point spread function
At point A, 4.80 m from a small source of sound that is emitting uniformly in all directions, the intensity level is 54.0 dB. What is the intensity of the sound at A
A boat is pulled by two locomotives through a canal of length 2.04 km, What is the net work done on the boat by the two locomotives
A solid cylinder with a mass of 1.5 Kg initially at rest rolls down from a height of 2.00 m. What will be its speed when it reaches the bottom
A car chases a coyote down a road ending in a sheer cliff. The car has a speed of 40.0 m/s and the coyote has a speed of 30.0 m/s. The car blows a siren at 440 Hz and the speed of sound is 340 m/s. What frequency does the coyote hear for the sound..
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