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Two spherical objects with a mass of 8.05 kg each are placed at a distance of 2.31 m apart. How many electrons need to leave each object so that the net force between them becomes zero?
The 1 kg block is tied to the wall with a rope. It sits on top of the 2 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2kg block is = 0..
A daredevil on a motorcycle leaves the end of a ramp with a speed of 39.0 m/s. what is the maximum height that he reaches
you are outside tossing a football with your friends. you throw the football at an angle of 52.3deg above the
Announcers at a certain radio station say that they are at "95 FM on your dial," meaning that they transmit at a frequency of 95 MHz (95 megahertz, or 95 million cycles per second). What is the wavelength of the radio waves from this station?
Two cylindrical metal rods-one copper, the other lead-are connected in parallel with a temperature of 22.0 C at one end, what is the diameter of the copper rod
A thin rod of length 0.84 m and mass 190 g is suspended freely from one end. find how far above that position the center of mass rises
A diver springs upward from a three-meter board. At the instant shecontacts the water her speed is 8.90m/s and her body makes an angleof 75.0o with respect to the surface of the water. How much time does she spend in the air
A train traveling at v0 = 28.0 m/s begins to brake by applying a velocity-dependent instantaneous acceleration a(v) = ? /(v+u) m/s^2, Determine the distance traveled by the train until it comes to a complete stop
A mass attached to a spring stretches it 2.5 cm from equilibrium. What is the angular frequency of the oscillation
If the activation energy for the vacancy formation is given as 0.77 eV for aluminium at (650 degrees Celcius) ^3, what would be the number of vacancies at 650 degrees Celsius? The atomic weight and the density of aluminium is 26.98 g/mol and 2.62 ..
A gas expands, changing its volume by +4.24×10-4 m3 while at a constant pressure of 6.44×105 Pa. What is the work done by the surroundings on the gas
a 2.5 kg object slides along a frictionless horizontal table with an initial speed to the left. it strikes a coiled spring ( force constant= 500. N/m), calculate the force exerted by the bumper on the object
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