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A 45-kg crate slides to the left initially at a speed of 5.2 m/s. A rope pulls on it with a tension of 240 N in a direction 35 degrees above the horizontal to the right. The coefficient of kinetic friction between the crate and the floor is 0.55. What is the acceleration of the crate? How much time is required to bring the crate to a stop?
A 2.00kg projectile is launched from the earth's surface with an initial velocity of 38.0 m/s at an angle of 45 degrees with respect to the horizon. What is the work done by gravity on the projectile
Oxygen (O2) has a molar mass of 32.0g/mol. What is its average translational kinetic energy at that speed
Two equal volumes designated 1 and 2, each of which contains a quantity of a classical monatomic gas at the same temperature, establish a relationship between the chemical potentials µ1 and µ2
The work function for zinc is 4.31 eV. Ultraviolet light of wavelength 144 nm is incident on the clean surface of a zinc sample. What is the photon energy of the ultraviolet light
a cylinder with a piston contains 0.150 mol of nitrogen at 1.80 105 pa and 300 k. the nitrogen may be treated as an
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
A 88 g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 76°C. What is the final temperature of the water after the ice has melted
A projectile is launched at an angle of 60o with respect to the horizontal from the edge of a cliff which is 100 m high. Its initial speed is 30 m/s. find the displacement vector for the motion of the projectile
A scuba diver can withstand pressures up to 4.2 atm without rish of getting the bends. What is the maximum safe diving depth
There are two identical, positively charged conducting spheres fixed in space. The spheres are 36.2 cm apart, find the initial charge on each sphere
A baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 24.76 m/s in the +x direction. What is the velocity of the ball after leaving the bat
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 7 mm. what is the percentage lost by the window
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