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Two small plastic balls hang from the threads of negligible mass. Each ball has a mass of 0.14 g and a charge of magnitude q. The ball are attracted to each other and the threads attached to the balls make an angle of 20 degrees with the vertical.
A) the magnitude of the electric force acting on each ball?
b) the tension in each of the threads
c) the magnitude of the charge on the balls
a solid aluminum ingot weighs 89n in the air. the ignot is suspended from a rope and totally immersed inn water. what is the tension in the rope
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.40 10-4 m3 and its mass is 3.87 kg. What percentage of the rock is gold by mass
an 15.0-kg box is released on a 35.0 incline and accelerates down the incline at 0.290m/s^2, Find the friction force impeding its motion
A 75 kg solid sphere with a 19 cm radius is suspended by a vertical wire attached to the ceiling of a room. A torque of 0.35 N m is required to twist the sphere through an angle of 0.75 rad. What is the period of oscillation when the sphere is releas..
The scale of a spring balance reading from 0 to 235rm {N} has a length of 15 rm{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.7rm {Hz}. What is the mass of fish? In Kg.
what speed does the rock have as it strikes the ground?
Given that the latent heat of water/steam is approximately 41,000 J/mol, at what pressure will water boil at 50 degress Celcius? hint: remember that at 1 atm water boils at 373 K. Also, assume that the latent heat is constant and that the volume of t..
The internal energy of a gas is 553.J. The gas is compressed adiabatically, and its volume decreases by 105.cm3. what is the internal energy of the gas after the adiabatic compression
A cannonball (20kg) is shot from a cannon(200kg) with a velocity of 20m/s. what is the backwards velocity of the cannon
Use this technique to find formula for the intensity of a sound, in terms of sound level and the reference intensity. There will be a quantity involved in the calculations. When you enter your answer, leave off the unit.
Suppose that in a hypothetical oil-drop experiment you measure the following values for the charges on the drops: 4.11*10^-19C, 6.85*10^-19C, 2.74 *10^-19C, 1.10*10^-18C, and 9.59*10^-19 C.
A rock climber throws a small first aid kit to another climber who is higher up the mountain. What is the vertical height between the two climbers
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