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A system consisting entirely of electrons and alpha particles has a net charge of 1.84*10^-15C and a net mass of 4.56*10^-23 kg. How many electrons and alpha particles are in this system?
A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s
Calculate the mass of a solid gold rectangular bar that has dimensions lwh = 4.30 cm 10.0 cm 20.0 cm. (The density of gold is 19.3 103 kg/m3.)
A surface completely surrounds a 4.5 × 10-6 C charge. Find the electric flux through this surface when the surface is (a) a sphere with a radius of 0.66 m, (b) a sphere with a radius of 0.30 m, and (c) a cube with edges that are 0.65 m long.
A student throws a baseball at a large gong 76 m away and hears the sound of the gong 1.95758 s later. What was the average speed of the base- ball on its way to the gong
In a vacuum chamber the pressure is lowered to 1.0 x 10-10 mm Hg. how many molecules are in 1 cm3 in this chamber
A Styrofoam cup holding 100 g of hot water at 1.00 102°C cools to room temperature, 17.0°C. What is the change in entropy of the room
An athlete on a trampoline leaps straight up into the air with an initial speed of 5.1 m/s, find the speed of the athlete when she is halfway up to her maximum height
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
If a freight train can accelerate at 0.050 m/sec2, how far must it travel to increase its speed fro 2.0 to 8.0 m/sec?
What is its velocity when it reaches the maximum height.
The sound of a truck horn, observed when the truck is stationary, is 440 Hz. A drunk is sitting in the middle of the road at night. How rapidly is the truck approaching him, in m/s2
question1a ferryboat transports tourists among three islands. it sails from the first island to the second island 5.98
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