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A +20 nC point charge is placed on the x axis at x =2.0 m, and a -25 nC point charge is placed on the y axis at y = -3.0 m. What is the direction of the electric field at the origin?
a photocell that detects the amount of light transmitted through the finger at each wavelength. Identify the frequency of each of these light sources. If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitu..
A projectile is fired straight upward from the Earth's surface at the South Pole with an initial speed equal to one third the escape speed. What is the altitude of the projectile at this instant
The accompanying pressure-volume graph shows an engine cycle with one isothermal process, B-C. What is the net work done by the gas during one cycle
A free floating piston cylinder device that contains 1 kg of a 25% quality saturated mixture of water at 150C, Determine the initial and final pressure, the total energy of electrical work added to the water
The Mini Cooper is rated at the maximum power of 115. hp (1 hp=746 W), when moving at 80km/h. Suppose that the net force accelerating the car is constant.
The voltage across a membrane forming a cell wall is 74.0 mV and the membrane is 8.80 nm thick. What is the electric field strength
A car of mass 1500kg is driving across a flat parking lot (u=0.3), How fast can the turn be made without causing the car to slide
One 20-year-old twin brother takes a space trip with a speed of 0.80c for 30 years according to a clock on the spaceship, determine the age of the Earth-based twin brother
A dead battery of 10v has an internal resistance of 1 ohms and is connected in parallel with jumper cables to another car with a 12v battery with internal resistance of 0.01 ohms
A 4.00 kg model rocket is launched, expelling 46 g of burned fuel from its exhaust at a speed of 590m/s. What is the velocity of rocket after the fuel has burned? Hint: overlook the external forces of gravity and air resistance.
A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, What is the speed of the third piece
The velocity of a ball changes from m/s to m/s in 0.02 s, due to the gravitational attraction of the Earth and to air resistance. What is the rate of change of momentum of the ball
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