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a force of 1250 N is used to push a piano up a ramp 12 m long to a height of 1.5 m above the ground. the piano weighs 7500 N. what is the work input and output?
An airplane flies from city A and arrives at city B which is located 600 km North of city A it flies the first 300km/h, find the Average velocity of the plane
A ten pound car wheel has a moment of inertia of 0.38 kg m2. What is the wheel's rotational kinetic energy
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12rpm in 10.8s. What force is required at the edge
A person with nearsightedness was prescribed with contact lenses of power -2.0 D. What is the range of object distances that this person can see clearly with the wrong lenses
A barge floating in fresh water (? = 1000 kg/m3) is shaped like a hollow rectangular prism with base area A = 650 m2, Find the mass of the coal in kilograms
A 1.00 kg chunk of ice at a temperature of 0 C and pressure of 1.0 atm melts completely to water of 0 C. What is the change of the entropy of the ice
The middle C string on a piano is under a tension of 977 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
q1. from a cliff that is 9.4 m above a lake a young woman mass 44 kg jumps from rest straight down into the water. at
Calculate the commutation relation for the inner product of position and momentum and angular momentum. In other words, what is: [p\cdotr, L] (vector p dotted with vector r, vector L)
A square loop (edge = 9.4 cm) is comprised of 41 turns of copper wire. The square loop is placed in the plane of the page, What is the magnitude of the induced emf in the square loop
A telescope has an angular magnification of -30× and a barrel 1.02m long. What is the focal length of the eyepiece
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
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