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A mirror is to be used to project a 2.00 tall image on a screen which is 4.70 from the mirror. What magnification is necessary to accomplish this task
A projectile launcher is set up in lab at a height of 1.05 meters above the lab floor. What is the horizontal distance which the projectile travels before it hits the ground
Box A weighs 80 N and rests on a table. A rope that connects boxes A and B drapes over a pulley so that box B hangs above the table
what is the equation for the mass moment of inertia of a mass rotating around a sliding hinge
A silicon solar cell looks like a battery with a 0.48V terminal voltage. what percentage of the energy incident on the cell is converted to electric energy
The radius of the hydrogen atom is 0.053 nm. compute the frequency of the circular motion of the electron
The Earth has an electric field that points toward the center of the earth and that has a magnitude of 150 N/C. How much charge is needed for it to be suspended in the air
A proton is confined within an atomic nucleus of diameter 4.1 fm. Estimate the smallest range of speeds
Three charges (Q1, Q2, and Q3) of equal size and same sign are places on the corners of an equilateral triangle. What is the net electric field at the geometric center of the triangle
Zinc has a work function of 4.30eV. What is the longest wavelength of light that will release an electron from a zinc surface, What is the maximum possible speed of the electron
Wavelengths of light from a remote galaxy are found to be 1.5 % longer than the corresponding wavelengths measured here on earth. What ids the speed of the galaxy relative to earth
On average, each American produces 20,000 kg of CO2 per year, mostly through the consumption of fossil fuel such as oil, coal, and natural gas. determine the length of each side of the cube
A bird sits on a high-voltage power line with its feet 4.6 cm apart. What is the potential difference between the bird's feet
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. what is the current in the solution
An object is placed 10.0\; cm in front of an unknown type of mirror that produces an erect image that is 3.11 times larger than the original object. What is the focal length of the mirror
A 230V shunt motor having an armature resistance of 0.05 ? and a field resistance of 75?? draws a line current of 7 A while running light at 1120 rev/min. determine the total core and mechanical los
An object starts from the origin and goes along the x-axis to x = 10 m in 2 s, stops for 5.5 s, and then travels at v = -4 m/s for 2.5 s
A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Find the current that the battery delivers to the lighter
A small moon of a giant planet has an orbital period of 1.74 days and an orbital radius of 4.02 105 km. determine the mass of the planet
A block of mass M= 100 kg is sliding down an inclined at an angle q= 30 degree above the horizontal. Find the acceleration of the block down the incline
A coil with magnetic dipole moment 1.5 A-m^2 is rotated initally with its magnetic moment parallel to a uniform magnetic field of 0.4T. what is the change in potential energy of the coil
A 20.0 cm \times 20.0 cm square loop of wire lies in the xy-plane with its bottom edge on the x-axis. The resistance of the loop is 0.550 {\Omega}. What is the size of the induced current in the loo
A camera has a lens with a focal length of 26.9 cm. how far from the film should the lens be placed
A converging lens with a focal length of 5.00 cm is placed 20.00 cm in front of a concave mirror whose focal length is also 5.00cm. Calculate the position of the final image formed by the system
Two spheres are launched horizontally from a 1.1m-high table. Sphere A is launched with an initial speed of 4.5 m/s. What is the time for the sphere A to hit the floor