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A worker stands still on a roof sloped at an angle of 36° abovethe horizontal. He is prevented from slipping by a staticfrictional force of 460 N. Find the mass of the worker.
A ray of light originating in oil (n = 1.21) is incident at the Brewster angle upon a flat surface of a quartz crystal (n = 1.458). Determine the angle of incidence for this ray
a simple pendulum has a mass of 0.550 kg and a length of 2.00 m. it is displaced through an angle of 11.0deg and then
An electron follows a circular orbit around the nucleus of a hydrogen atom at a radius of 5 *10^11m and with aperiod of 1.4 *10^-16s. What is the magnitude of the orbital magnetic dipole moment of the hydrogen atom
A spaceship travels at constant velocity from Earth to a point 780 ly away as measured in Earth's rest frame, How old is the passenger when the ship reaches its destination, as measured by the ship's clock
Draw the field lines for two infinitely long wires one running along the y axis and one running along the x axis, both charged uniformly with lambda C/m. Make an expression for the electric field E at any point in the xy plane in terms of x and y...
Sam, whose mass is 75\;kg, takesoff across level snow on his jet-powered skis. What is Sam's top speed
A 2.0x10^-9 C point charge is located at x=3 cm, Determine the force on the negatively charged object due to the positively charged object
a 30 year old women takes a trip on a rockect leaving her 30 year old brother behind. She travels at a speed of .8c and is gone for 20 years, how many years older/younger is she than her brother
Two circuits contain an emf produced by a moving metal rod, like that shown in the drawing. If the speed of the rod in circuit 1 were twice that in circuit 2, what would be the ratio P1/P2 of the powers in the circuits
Here's a basketball problem: A 75.0 kg basketball player is running in the positive direction at 8.2 m/s. what is the resulting velocity of the 75.0 kg player
A sample containing sulfur (atomic mass 32 u), manganese (55 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
If the separation between the two plates is double the value calculated in part (a), what potential difference is required for the capacitor to store charge of magnitude 260 pC on each plate
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