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A rope is used to pull a 2.72 kg block at constant speed 6.90 m along a horizontal floor. The force on the block from the rope is 5.70 N and directed 23.0° above the horizontal. What are
(a) the work done by the rope's force,
(b) the increase in thermal energy of the block-floor system, and
(c) the coefficient of kinetic friction between the block and floor?
Three charges are located along the x-axis. Charge A (+5.00x10-6 C) is located at the origin. Find the total force (and direction) on charge B
At the same time, car 2 is 1.2 east of mile marker 0 travelling at 30 due wests. Car 1 is speeding up with an acceleration of magnitude 0.20, and car 2 is slowing down with an acceleration of magnitude 0.60.
Charges of 3.00 nC, -2.00 nC, -7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, What is the electric flux through the surface of the box
The mass of Mercury is 0.0550 times that of earth, and its radius is 0.380 times that of earth. Calculate the average density of Mercury
After falling from rest from a height of 28 m, a 0.46 kg ball rebounds upward, reaching a height of 18 m. If the contact between ball and ground lasted 1.7 ms, illustrate what average force was exerted on the ball?
Consider purchasing a new tire with a warranty of 6.4 x 10^7 meters. Calculate the thickness of the tread that will be worn away with each revolution of the tire
A handball is projected at an angle of 30 deg with the horizontal from a 20 m tower with an initial vertical velocity of 10 m/sec, find the Resultant velocity at landing
Assume that the blocks accelerate as shown with an acceleration of magnitude = 0.250 and that the coefficient of kinetic friction between block 2 and the plane is = 0.400. Find out the mass of block 2, , when = 30.0.
Suppose you are myopic (nearsighted). You can clearly focus on objects that are as far away as 50.2 cm away. What would be the refractive power (in diopters - do not enter units) for your prescription
A shotgun blast of 140 decibels occurs with humidity of 70% and temperature of 50 degrees. Illustrate what is the decibel level at 100 yards away? At 200 yards
If the piston has a cross sectional area of 0.0100 m^2 and negligible mass, how high would it rise when the temperature is raised to 250°C.
A total of 34 bright and 34 dark Newton's rings (not counting the dark spot at the center) are observed as 550 -nm light falls normally on a planoconvex lens resting on a flat glass surface. How much broad is the center than the edges.
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