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What is the net force of a 4.0 N force and an 9.0 N force acting on an object for each of the following conditions?
(a) The forces act in opposite directions.
(b) The forces act in the same direction.
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. What is the magnitude of the acceleration of a proton placed at that point in space
An electron is moving in a concentric circular orbit inside a solenoid of radius 4.89 cm, in such a manner that it grazes the inside surface of the coil at all the points of its orbit. What electric current is passing through the solenoid
A 1600-kg car starts from rest to reach 60.0 miles/h in 6.50 s. What is the engine's power output, How much work is done by the engine during the acceleration
Two hydrogen atoms collide head on. The collision brings both atoms to a halt. Immediately after the collision, both atoms emit a 121.6 nm photon. What was the speed of each atom just before the collision?
A red line (wavelength 620 nm) in the third order overlaps with a blue line in the fourth order for a particular grating. What is the wavelength of the blue line
Three insulating balls are suspended from thin threads. Various objects are then rubbed against other objects and each of the insulating balls is charged by touching them with one of these objects. In each case.
A spherical balloon is made from a material whose mass is 3.00 kg. The thickness of the material is negligible compared to the 1.4 m radius of the balloon. Find the absolute pressure of the helium gas
A stone is thrown from the top of a cliff 150 m above the ground, What is the speed (magnitude of velocity) of the stone when it hits the ground
A spherical raindrop of mass 0.0112 g and radius 1.39 mm falls from a cloud that is at a height of 1195 m above the ground. What is the raindrop's terminal speed
You create a plot of T2 (in s2) vs. L (in m) and the linear fit of your graph gives a slope of 3.7084 ± 0.0062. What is the value of the local gravitational constant, g
A 662-keV photon is Compton scattered at an angle of 120degree with respect to its incident direction. What is the energy of the scattered electron? What is the angle between the paths of the scattered electron and photon?
Three equal point charges, each with charge 1.15 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
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