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A 47.3-kg skater is standing at rest in front of a wall. Bypushing against the wall she propels herself backward with avelocity of -2.41 m/s. Her hands are in contact with the wall for1.19 s. Ignore friction and wind resistance. Find the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall applies to her). Note that this force has direction, which you should indicate with the signof your answer.
The carbon isotope 14-C is used for carbon dating of archeological artifacts. What is the recoil speed of the nucleus
When red light in a vacuum is incident at the Brewster angle on a certain type of glass, the angle of refraction is 29.2°. What is the Brewster angle
A 10.0 g object moving to the right at 22.0 cm/s makes an elastic head-on collision with a 15.0 g object moving in the opposite direction at 34.0 cm/s
Climate change impacts are measured by Global Warming Potential (GWP), which is measured in units of carbon dioxide (CO2) equivalents, or CO2e. The daily GWP for a manufacturing plant that emits 1 ton of N2O, 3 tons of CH4 and 5 tons of CO2 per day i..
A 4 kg box is raised from rest adistance of 6 m by a vertical force of110 N. Find the final kinetic energy of the box
A resistor with R = 1.5 k? is connected to an AC generator that operates at 60 Hz with an amplitude of 49 V. (a) Find the amplitude of the current through the resistor. A
A small piece of dust of mass m = 1.2 g travels horizontally through an electric air cleaner in which the electric field is 472 N/C, What is the charge of the dust particle
During 5 successive 0.93 min intervals, a runner moves at the following constant speeds: 0.424 km/min, 0.224 km/min, 0.160 km/min, 0.160 km/min
Water is being pumped through a horizontal pipe that is 37.8 m long and 14.5 cm in diameter. what gauge pressure must the pump provide to give the same volume flow rate as for the first pipe
A 10.0-kg object experiences a drag force due to air resistance. At what velocity (magnitude and direction) is the net force on the object twice its weight
A 1.00 kg object is attached to a horizontal spring. The spring is initially stretched by 0.200 m, What is the maximum speed of the object
An alpha particle (a He nucleus, containing two protons and two neutrons, What is the diameter of the path followed by this alpha particle
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