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A 25 kg box is acted on by a 45 N horizontal force. If the box accelerates at a rate of .75 m/s2, what is the coefficient of kinetic friction between the box and the table?
an electron traveling at 993 ms enters a 1.5 t magnetic field. the angle between the velocity and the field is 90o.
A 145 g copper bowl contains 205 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5.40 g being converted to steam.
A spectral line of sodium normally has a wavelength of 5890Angstroms. The same line measured in the spectrum of a star is at awavelength of 5625 Angstroms. At what speed in the star traveling? Is the star moving towards us or away from us?
Two round rods, one steel and the other copper, are joined end to end. Each rod is 0.760 long and 1.35 in diameter, For the steel rod, what is the elongation
A bullet with a mass of 25.0 grams is fired into a block with a mass of 2.50 kg hanging from a string. to what height will the block and bullet go
An electron moves in a circular path perpendicular to a magnetic field of magnitude 0.225 T, find the radius of the circular path
A parallel-plate capacitor has plates of area 0.16 m2separated by a distance of 0.004 m. What is the strength of the electric field between these plates when this capacitor isconnected to a 4-V battery?
A hydrogen atom is initially at n =3 state. find How much energy is required to ionize this atom
A 0.360 kg pendulum bob passes through the lowest part of its path at a speed of 2.86 m/s, When the pendulum reaches its highest point, what angle does the cable make with the vertical
If the projectile rises to a maximum height of only 10.2 m, identify the magnitude of the average force due to air resistance.
Two 5000 kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They collide, couple, and roll away together with the combined momentum.
A droplet of ink in an industrial ink-jet printer carries acharge of 1.6x10-11 coulombs and is deflected ontopaper by a force of 3.2x10 -4 newtons. Find thestrength of the electric field to produce this force.
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