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A ladder is leaning against a wall by negligible friction. It is at an angle of 70 degrees to the horizontal, has a mass of 10kg and is 4 meters long. Its center of mass is 1/3 from the bottom end. What is the minimum coefficient of static friction to keep the ladder from sliding in this configuration? If a 75kg man climbs the ladder to the middle, will the ladder slip?
A tank of volume 0.5 m^3 contains oxygen at a measure of 1.5 x 10^6 Pa and a temperature at 20 degrees C. How many kilomoles of oxygen are in the tank
during the time 0.315 mol of an ideal gas undergoes an isothermal compression at 21.0degc 530 j of work is done on it
1.76- block at rest on a ramp of height. While the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 12.0 that has a coefficient of kine..
Consider a system consisting of two long, concentric solenoids. The larger solenoid has current running in counter clockwise fashion. Find the magnetic field strength inbetween the solenoids. positive number if it is up
A laser beam is incident at an angle of 44.0° to the vertical onto a solution of corn syrup in water. Suppose the light is red, with wavelength 632.8 nm in a vacuum. Find its wavelength in the solution
A 50 kg bag of sand at 25 C falls 10 m onto the pavement and comes to an abrupt Stop. What is the change in internal energy in the sand
A battery with an emf of 1.5 V and a 12 Ω resistorare the only two components in a circuit. You measure the current flowing through the circuit to be 0.090 A. What is the internal resistance of the battery?
On days of fair weather, the atmospheric electric field of the Earth is about 116 N/C; What is the surface charge density on the ground
The magnetic force acting on a wire that is perpendicular to a 3.7 T uniform magnetic field is 6.4 N. If the current in the wire is 5.0 A, what is the length of the wire that is inside the magnetic field? Answer in units of m.
A cargo plane is flying horizontally at an altitude of 20.0 km with a speed of 888 km/h when a large crate falls out of the rear loading ramp. How long does it take the crate to hit the ground
Two identical mandolin strings under 200 N of tension aresounding tones with frequencies of 523 Hz. How many beats per second are heard
In photo like the Hubble Deep Field, we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives.
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