Biology

Biology, 29.06.2019 03:30, alyxkellar06

Does an asteroid need to hit the earth to do damage? why or why not?

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Physics, 24.07.2019 05:00, cadez

An asteroid flies close to the earth. gravity does what? a.repels the asteroid away from the earth. b. attracts the asteroid and the earth to each other. c. makes the asteroid spin rapidly. d. causes the asteroid to explode.

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Physics, 31.07.2019 22:50, milhai0627a

An asteroid with a mass of 5.0 x 105 kg collides with the earth and slides horizontally along the ground without bouncing (not actually possible but just pretend). the velocity of the asteroid before impact is 1.1 x 104 m/s and the coefficient of kinetic friction between the asteroid and the earth is 1.80. how much energy is lost due to friction between the asteroid and the earth after the asteroid has come to rest?

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Physics, 18.10.2019 17:30, ineedtopeebeforethec

A"doomsday" asteroid with a mass of 1.0 × 1010 kg is hurtling through space. unless the asteroid's speed is changed by about 0.20 cm/s , it will collide with earth and cause tremendous damage. researchers suggest that a small "space tug" sent to the asteroid's surface could exert a gentle constant force of 2.4 n .

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Physics, 23.10.2019 17:30, isaiah1027

A4.0×1010kg asteroid is heading directly toward the center of the earth at a steady 16 km/s. to save the planet, astronauts strap a giant rocket to the asteroid perpendicular to its direction of travel. the rocket generates 5.0×109n of thrust. the rocket is fired when the asteroid is 4.0×106km away from earth. you can ignore the earth’s gravitational force on the asteroid and their rotation about the sun. part a: if the mission fails, how many hours is it until the asteroid impacts the earth? part b: the radius of the earth is 6400 km. by what minimum angle must the asteroid be deflected to just miss the earth? part c: what is the actual angle of deflection if the rocket fires at full thrust for 300 s before running out of fuel?

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