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Two small metallic spheres, each of mass m = 0.220 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.8 nC, and they come to equilibrium when each string is at an angle of θ = 4.50° with the vertical. How long are the strings?
In a television set, the power needed to operate the picture tube comes from the secondary of a transformer. Determine the secondary voltage
When UV light of wavelength 245nm falls on a metal surface, What is the work function of the metal
A charge of q = +7.50 µC is located in an electric field. The x and y components of the electric field are Ex = 4.80 103 N/C and Ey = 7.40 103 N/C, respectively. (a) What is the magnitude of the force on the charge? (b) Determine the angle that th..
In outer space, far from other objects, block 1 of mass 30 kg is at position m, and block 2 of mass 1350 kg is at position m. What is the (vector) gravitational force acting on block 2 because of block 1? It helps to make a sketch of the situatio..
When a potential difference of 168 V is applied to the plates of a parallel-plate capacitor, the plates carry a surface charge density of 23.0 nC/cm2. What is the spacing between the plates
A television set connected to a 121 V outlet consumes 88 W of power. How long does it take for 10 million electrons to pass through the television.
The force of the wind on the sails of a sailboat is 410 N north. The water exerts a force of 240 N east. If the boat (including crew) has a mass of 330 kg, illustrate what are the magnitude and direction of its acceleration?
find out the angular speed after the grindstone has made.
6.00g of nitrogen gas at 22.0 degree celsius and an initial pressure of 4.00atm undergo an isobaric expansion until the volume has tripled, What amount of heat energy is transferred from the gas as its pressure decreases
Compute magnitude of the average velocity
Find the maximum weight for the car if the springs should be compressed no more than 4.2 cm when the car is at rest
A column of soldiers, marching at 141 paces per minute, keep in step with the beat of a drummer at the head of the column, What is the approximate length of the column
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