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A spherical oil droplet with nine excess electrons is held stationary in an electric field between two large horizontal plates that are 2.25 centimeter apart. The field is produced by maintaining a potential difference of 0.3375 kV across the plates, and the density of the oil is 824 kg/m3. Determine what is the radius of the oil drop? (e = 1.60 x 10-19 C).
A 30-kg 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
A 3.0 kg block of silver is completely immersed in water. calculate the mass of water displaced by the silver block
A shell is fired from a gun with a muzzle velocity of 25 m/s, at an angle of 60° with the horizontal. How far from the gun does the other fragment land
An airplane has a mass of 3 * 104 kg and takes off under theinfluence of a constant net force of 35 000 N. What is the netforce that acts on the plane’s 80 kg pilot, assuming that hehas the same acceleration as the plane?
An object of mass 4 kg is initially at rest on a frictionless ice rink. It suddenly explodes into three pieces . One chunk of mass 1 kg slides across the ice with a velocity 1.2 ms-1 i and another chunk of mass 2kg slides across the ice with a veloci..
An indoor running track is square-shaped with rounded corners; each corner has a radius of 5.30 m on its inside edge. What is the design speed on the innermost lane of the track if the banking angle is 11.0 degrees
A projectile is launched with aninitial speed of 60 m/s at an angle of 60 degrees. It lands on ahillside 4 seconds later. What is the straight line distance to where it lands
An artillery gun is firing a shell with the initial velocity V0 =250 m/s at an angle 1 =60o to the horizontal. Find the time interval t between shots
You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. What is the linear mass density of the string
What would be the percentage change in volume of a cube of aluminum that measured 1.50 on a side when at the ocean surface. how much did the aluminum cube's volume change.
Nichrome wire of cross-sectional radius 0.791 mm is to be used inwinding a heating coil. estimate the length of wire you must use to wind the coil
a box-shaped wood stove has dimensions of 0.75 m x 1.2 m x 0.40 m an emissivity of 0.81 and a surface temperature of
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