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Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m and x2 = -2.0 m. What is the electric potential energy of this system of charges?
A skier of mass 120 kg starts from rest at the top of the ski slope of height 100 m, find the skier's speed when he reaches the bottom of the slope
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.00e-4 m3 and its mass is 3.48 kg. (a) What mass of gold is contained in the rock in kg? (b) What percentage of the rock is gold by volume? (..
A friend speeds by you in her spacecraft at a speed of 0.770 c. It is measured in your frame to be 4.70m long and 1.45m high. What will be its length at rest
q1. a trapeze artist swings in simple harmonic motion with a period of 7.0 s. the acceleration of gravity is 9.81 ms2.
If Argentinosaurus, a long-necked, gigantic sauropod, had a head height of 19 m and a heart height of 9.1 m, What was the blood pressure (in torr or mm Hg) at the feet
A 35kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
In a physics demonstration, a stationary mass m1 = 0.20kg slides down a frictionless ramp and then collides with a second mass m2 = 0.40 kg. Find the height needed if you reverse the masses
Monochromatic light with wavelength 570nm passes through a circular aperture with diameter 7.00?m. What is the diameter of the Airy disk on the screen
A copper ion with a single electron (denoted Cu28+) is in an excited state with radius the same as that of the ground state of hydrogen. How much energy in eV is needed to ionize the ion from this excited state
Ricardo walks 22.0 in a direction 50.0 west of north. Jane walks 20.0 in a direction 30.0 south of west. They after that stop and turn to face each other.
An ideal spring of negligible mass is 11 long when nothing is attached to it. When you hang a 3.20- weight from it, you measure its length to be 12.3.
A body moves with respect to a stationary reference point. At time 1.0 s, position of the body is given by vector R1 bar that points to the east of the reference point, Find the average velocity of the body
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