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Two batteries of emf and internal resistance e1,2 and r1,2 are connected in parallel. Find the effective emf and internal resistance of this parallel combination.
Find out altitude of the airplane
Consider a theoretical head-on collision between two carts of equal mass and equal speed. What is the total momentum after the collision
Suppose that an insulating container of negligible mass contains 0.12 kg of water at a temperature of 4 degrees C. what is the final mass (in kg) of the water in the system
A polarized light beam, with a 7.33-mm-diameter circular cross section, is perpendicularly incident on an ideal polarizer, What force in piconewtons does the light exert on the polarizer
A particle with a positive charge 2e moves with a velocity V= (2i + 3j - k) m/s through a region where both a uniform magnetic field and a uniform electric field exist. Calculate the total force on the moving particle
A force of k is applied to an object for a small fraction of a second, t_k, less than the duration of one frame, t_f. Our simulation doesn't support applying forces for less than an entire frame, so if we wanted to simulate the effect of force k over..
On a cool morning, when the temperature is 11 ^circC, you measure the pressure in your car tires to be 30.0 psi. After driving 20 mi on the freeway, the temperature of your tires is 53 ^circC.
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
An aluminum cylinder is suspended in an unknown fluid by a spring scale. Outside the fluid, the object weighs 20N. In the fluid,
A girl throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 seconds before reaching the water below. How high is the bridge from the water? How far horizontally does the rock travel before striking the water.
Two particles are fixed along a straight line, separated by a distance 4.2 cm. The left one has a charge +3.0 nC and the right one has a charge of +7.0 nC. What is the location of the point
Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. How much time is required for the projectile to come up to speed
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