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In the solar system frame, two events are measured to occur 3.0 hours apart in time and 1.5 hours apart in space. Observers in an alien spaceship measure the two events to be seperated by only 0.5 hours in space. What is the time seperation between the events in the alien's frame?
A 1.10 kg water balloon is shot straight up with an initial speed of 4.10 m/s. What is the kinetic energy of the balloon just as it is launched
In the bohr model of the hydrogen atom, an electron is the 6th excited state moves at a speed of 60km/s in a circular path having a radius of 2mm.
A 100 kg cannon at rest contains a 10-kg cannon ball. When fired, cannon ball leaved the cannon with a speed of 450 m/s. What is the recoil speed of the cannon.
To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, How far away was the lightning
Only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. One force is 9.0 N, acting due east, What is the magnitude of the body's acceleration
When an electron in a hydrogen atom falls from a higher energy state down to the ground state, What is the quantum number of the level from which the electron fell
An electron is released a short distance above Earth's surface, the first electron just great enough to cancel the gravitational force on it, How far below the first electron is the second
When we look at a particular star, we are seeing it as it was 103 years ago. How far away from us (in meters) is the star
Two slits spaced 0.500mm apart are placed 77.0cm from a screen. What is the distance between the second and third dark lines
A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 242 N. What is the magnitude of the acceleration of rock.
A copper block is removed from a 306?C oven and dropped into 1.00kg of water at 20.1?C. What is the mass of the copper block
How fast is the mass moving at the top of its new path (directly above the peg)?
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