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A gray kangaroo can bound across level ground with each jump carrying it 8.1m from the takeoff point. Typically the kangaroo leaves the ground at a 25? angle. If this is so: what is its takeoff speed? What is its maximum height above the ground?
an electron microscope accelerates an electron (mass of electron is 9.11x10^-31 kg) from rest to 2.8 x 10^7 m/s in a distance of 2.80 cm, what is the average force on the electron
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^8 m/s are approaching each other for a head-on collision
A 68 kg student balances a 1400 elephant kg on a hydraulic lift. When a second student joins the first, What is the second student's mass
A solenoid of length 3.06 cm and diameter 0.663 cm is wound with 170 turns per cm. what is the magnetic flux through one of the windings of the solenoid
What angle did the hawk make with the horizontal throughout its descent? For how long did the mouse enjoy the free fall.
A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). How many free electrons does the battery contain
A cat runs along a straight line (the x-axis) from point A to point B to point C. The distance between points A and C is 5.00 m, distance between points B and C is 10.0 m, and the positive direction of x axis points to the right. The time to run f..
Two point charges .03 m apart have an electric potential energy -90 microjoules . The total charge is 20 nanoCoulombs. What is the lesser charge
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
mass of the earth is 5.97x10^24 kg. the radius of its orbit around the sun is 1.50x10^11m. calculate the force between the earth and the sun
A liquid is flowing through a horizontal pipe whose radius is 0.0216 m. What volume flow rate will keep the pressures in the two horizontal pipes the same
a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is at xg = 211 m.
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