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A 2.2hp electric motor on a water well pumps water from 14m below the surface. The density of water is 1.0 kg per liter.
How many liters of water does the motor pump in 2.0hr?
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
Protons in cosmic rays have been observed with kinetic energies as large 2.70 × 108 eV. How fast are these protons moving
Calculate the horizontal force that must be applied to a 1.00 kg puck to make it accelerate on a horizontal friction-free air table with same acceleration it would have if it were dropped and fell freely.
A 2-mol ideal gas system undergoes an adiabatic process where it expands, How much heat is received by the system
A charged particle A exerts a force of 2.75 ?N to the right on charged particle B when the particles are 12.0 mm apart. Particle B moves straight away from A to make the distance between them 17.6 mm. What vector force does particle B then exert o..
A bottle containing 2 kg of water at a temperature of 15°C is placed in a refrigerator where the temperature is kept at 4°C.
As a result of the friction of tides, the earth rotates more slowly as time progresses. What is the torque(N*m) acting on the earth
A 2.0 kg ball is attached to a vertical post with two strings, one 2 m long and the other 1 m long. If the ball is set whirling in a horizantal circle, find the tension on each string
Consider two particles, each with a charge of +Q located at the opposite corners of a square of side d. What is the direction of the net electrical field at point P
A particle starts from the origin at t=0 with a veolicty of 6.0i m/s and moves in the xy plane with a constant acceleration of (-2.0i+ 4.0j). how far is it from the origin
A fisherman's scale stretches 4.0cm when a 2.3kg fish hangs from it. What is the spring stiffness constant
Given the initial velocity V1=2i+1j m/s of a moving object. It is subject to the acceleration A=1i+2j m/s^2, What is the object's final speed
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