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Two spaceships approach Earth with equal speeds, as measured by an observer on Earth, but from opposite directions. A meterstick on one spaceship is measured to be 60 cm long by an occupant of the other spaceship. What is the speed of each spaceship, as measured by the observer on Earth?
What is this force in Newtons.
The planet mars hass a mass of 6.42x10^23kg and a radius of 3396km. What escape speed is needed for a space ship leaving the surface of Mars
An isolated copper sphere of radius 3.00cm, initially uncharged, is illuminated with ultraviolet light of wavelength 180nm. what charge does the photoelectric effect induce on the sphere
A 60 skydiver can be modeled as a rectangular "box" with dimensions 21 41 1.8. What is his terminal speed if he falls feet first
A photographer in a helicopter ascending vertically at a constant rate of 10.5 accidentally drops a camera out the window when the helicopter is 64.0 above the ground, What will its speed be when it hits
observations of a certain galaxy show that stars at a distance of 16 pc from the center of the galaxy orbit a central
A 1.10 kg mass is at the center of a uniform spherical shell of mass 1.09 1020 kg and radius 1.05 106 m. Find the resultant gravitational force on the mass
question at the top of earths atmosphere sunlight has an average intensity of 1380wm2 .if the average distance from
An unknown liquid fills a cubical container of side length of 15cm. The mass of the liquid (excluding the container) is 3.11 Kg. What is the absolute pressure of the container
An archer lines up an arrow on the horizontal exactly dead center on a target. She releases the arrow, and it strikes the target a distance h=7.6cm below the center. how long was the arrow in the air before striking the target
q1. a 35.0-kg child swings in a swing supported by two chains each 2.90 m long. the tension in each chain at the lowest
The larger the mass of a star, the shorter its Main Sequence lifetime becomes. Estimat the Main Sequence lifetime of a star with a mass of 6 Msolar
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