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A NASA satellite has just observed an asteroid that is on a collision course with the Earth. The asteroid has an estimated mass, based on its size, of 5×109kg. It is approaching the Earth on a head-on course with a velocity of 660m/s relative to the Earth and is now 4.0×106km away. With what speed will it hit the Earth's surface, neglecting friction with the atmosphere? Please explain.
Find out the angle theta_1 through which the flywheel will have turned during the time it takes for it to accelerate from rest up to angular velocity omega_1.
Regarding the Earth and a cloud layer 800 m above the earth as the "plates" of a capacitor, calculate the capacitance. What is the maximum charge the cloud can hold
An object placed on an equal-arm balance scale requires 12 kg to balance it. When object is placed on a spring scale, the spring scale reads 12 kg.
A box starts out at the top of a frictionless ramp, then slides down. The ramp has a height h = 3 meters and a slope of 5 degrees with respect to the ground. What does this make the velocity of the box at the bottom
18th Century cannon had a maximum range of 1.10 miles when fired on level ground. Find the velocity of the cannonball as it leaves the cannon
A positive charge of 3.2×10-9 C is brought in from infinity to a point (2m,0), How much work did the electric field do
A vertical, 1.30-m length of 18-gauge (diameter of 1.024 mm) copper wire has a 160.0-N ball hanging from it. What is the wavelength of the third harmonic for this wire
When the brakes of a certain car are applied, a deceleration of 6.0 m/s^2 is produced. How far will it travel in that time
If the partial pressure of water vapor is 47 mm Hg in the lungs at 760 mm Hg pressure, what percentage of air does the water vapor constitute?
A cart of mass (851.8 +- 0.1)g is configured in a setup. The tension in the string is 0.36 N and the cart has a displacement of 40.9cm
What are the lowest and the highest frequencies. calculate the acceleration of the crate.
Four vectors A,B,C ,D and are shown (not to scale). Vector A has magnitude 23.0 and acts at an angle of 14.7 degrees with respect to the positive x axis. find the magnitude and direction of the resultant vector R
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