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(a) How much heat does an engine with an efficiency of 26.0% absorb in order to deliver 2.00 kJ of work?
kJ
(b) How much heat is exhausted by the engine?
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. Sodium is 2.3 eV, What is the stopping potential for the emitted electrons
A speed skater goes around a turn that has a radius of 36 m. The skater has a speed of 12 m/s and experiences a centripetal force of 461 N
Angular speed is the increased to 10 rad/2 over the next 4 seconds. Illustrate what is the average tangential speed at the edge of the grindstone during this time
A dockworker applies a constant horizontal force of 79.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 15m in a time 4.50s. What is the mass.
It takes only 9.12N of force to hold up a 1KG metal crown in water, Compute the specific gravity of this metal, and guess what element it might be using a density table
I hold a flat mirror 24.6 cm in front of my face. There is a freckle on my face 1 mm in diameter. Find the angular size of the freckle on the image of my face as viewed by my eye
State your answer in terms of and Use three significant figures in the numerical coefficient.
A person who weighs 68 kg steps onto a spring scale in the bathroom, and spring compresses by 0.79cm. (a) what is the spring constant? (b) What is the weight of another person who compresses the spring by 0.34cm.
Derive a formula for the maximum speed vmax of a simple pendulum bob in terms of g, the length L
A tuning fork vibrates at a frequency of 530 Hz. An out-of-tune piano string vibrates at 535 Hz. How much time separates successive beats
Solve the algebraic expression by using power rules.
Two point charges, +3.75 µC and -6.05 µC, are separated by 1.21 m. What is the electric potential midway between them
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