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A 100-g piece of metal initially at 100 C is placed in a 250 gof water contained in a 300-g aluminum vessel initially at 20.o C.If the final equilibrium temperature is 25.0 C, what is the specific heat of the unknown piece of metal? What type of metal isthe unknown mostly composed of?
If a feather is dropped on the moon falls 81.7cm in one second, calculate the acceleration due to gravity on the moon
A 77.1 kg man is riding an escalator in a shopping mall. What is the work done on the man by the gravitational force
When light with a wavelength of 228 nm is incident on a certain metal surface, Determine the wavelength of light that should be used to double the maximum kinetic energy of the electrons ejected from this surface
q1. two balls of masses 43kg and 65kg are suspended. the lighter ball is pulled away to a 66 angle with the vertical
Consider a pendulum suspended at some location on the Earth. The length of the pendulum can be taken to be much shorter than the radius of the Earth. Approximate the Earth as a sphere. Find an equation for the angle, alpha, that the pendulum make..
Find an expression for the loop's velocity as a function of time as it enters the magnetic field. You can ignore gravity, and you can assume that the back edge of the loop has not entered the field
Consider two uniformly charged parallel plates as shown in the figure. The magnitudes of the charges areequal.If the plates are 1.0 cm by 1.0 cm squares,and the charges on the plates are +/- 2.6 μC respectively,what is the magnitude of the electric f..
A 1.80kg block slides on a rough horizontal surface. The block hits a spring with a speed of 2.50m/s, what is the force constant of the spring?
What is the free-fall acceleration toward the sun at the distance of the earth's orbit? [The mean distance the earth is from the sun in its orbit is 1.50x10^11 m
A roller coaster of mass 250kg has a speed of v=12m/s at point a, located at a height h=15m. The car can move without friction actiong between points a and b. How far does the car travel before coming to rest
The K series of the discrete x-ray spectrum of tungsten contains wavelengths of 0.018 5 nm, 0.020 9 nm, Determine the ionization energies of the L, M, and N shells
Determine the magnitude when the force on the wire
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