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Two point charges lie on the x axis. A charge of +7.5 µC is at the origin, and a charge of -5.5 µC is at x = 10.0 cm. (a) What is the net electric field at x = -2.0 cm? (b) What is the net electric field at x = +2.0 cm?
A heat engine is taking in 400 J from a hot reservoir that is at 20 degrees Celsius. It expels heat to a cold reservoir at 0 degrees Celsius> What is the ideal efficiency of the engine
A horizontal force of 80 N acts on a mass of 6 kg resting on a horizontal surface. Calculate the total energy expended in the acceleration
A high powered 20.0 megawatt laser of beam diameter 6.00cm hits 100% absorptive, find how far the disk moves before the laser momentarily stops its motion
A charge of ?3.00nC is placed at the origin of an xy-coordinate system, find the x and y components of the total force and Find the direction of this force
q1. a planet of mass 4.00 1025 kg is in a circular orbit of radius 3.00 1011 m around a star. the star exerts a force
A pion is an unstable particle that has an average lifetime of 2.55 × 10-8s. How far does it travel in its lifetime, relative to Earth
A diverging lens with a focal length of -22 cm and a converging lens with a focal length of 19 cm have a common central axis. Their separation is 19 cm. An object of height 3.0 cm is 10 cm in front of the diverging lens, on the common central axis..
What is modify in frequency ff - fi
what are the magnitude and direction of its acceleration. A potential difference of 80 mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to the outer surface. How much work is required to ej..
leo and christian are twins. at the age of 30, leo left for a round trip to a distant star in a spaceship with a speed of 0.95 c relative to Earth. the trip took 20 years according to the ship-board clock. find their ages upon leo's return.
A 328 kg rocket moving radially outward from Earth has a speed of 7.28 km/s when its engine shuts off 173 km above Earth's surface. What maximum height (in km) above the surface is reached by the rocket
The velocity of the transverse waves produced by an earthquake is 4.29 km/s, while that of the longitudinal waves is 7.5075 km/s. How far away was the earthquake
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