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A 85.9-kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is ?k = 0.561.
(a) What is the magnitude of the frictional force?
(b) If the player comes to rest after 1.27 s, what is his initial speed?
Two nanowires are separated by 1.6 nm as measured by STM. Inside the wires the potential energy is zero, but between the wires the potential energy is greater than the electron's energy by only 1.4 eV.
A 7 kg bowling ball moves at 2.15 m/s. How fast should a 2.40 g Ping-Pong ball move so that the two balls have the same kinetic energy.
Consider a Boeing 777-200 airplane of wing span 60.93 m cruising horizontally at Mach 0.785 (about 828 km/h) due north in a region where the earth's magnetic field is .98*10
The radius of a rod is 0.251 cm, the length of aluminum part is 1.3 m and of the copper part is 2.66 m, Determine the elongation of the rod
A light spring-gun projectile launcher is mounted on an 0.393 kg air track glider. What is the speed of the air-track glider after the gun is fired
An uncharged capacitor is connected to a 44.0V battery until it is fully charged, after which it is disconnected from the battery. What will now be the voltage between the plates
Kenny throws a basketball which has an initial speed v0. When the ball gets to its mininum speed sometime before striking the ground, What was the initial angle of the ball
The same force that gives the standard 1 kg mass an acceleration of 1.00 m/s2 acts first on body A, Find the acceleration produced when A and B are attached
find capacitance of a paraell-plate capacitor with area 34_cm^2, seperation distance 0.72_mm an dielectric with constant 2.5. use 8.85 x 10^-12 C^2/N*m^2
Suppose0.430kg of water initially at39.0°C is poured into a 0.300 kg glass beaker having a temperature of 25.0°C. Calculate the final equilibrium temperature of the system
A charge of -5.0 nC is uniformly distributed around a ring of radius 1.5 m that lies in the yz plane with its center at the origin, Calculate the work done in moving the point charge to the origin
An ideal gas expands at a constant pressure of 2.9 atm from 435 mL to 709 mL. Heat then flows out of the gas, determine the total heat flow into the gas
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