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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.
A block of mass m is suspended from the string a height h above the ground. The string is wrapped around a disk shaped pulley with mass m and radius R. Find out the tension T in the string. (The answer should be in terms of variables). Rotational ..
If a pitcher throws a 3 kg ball at 30 m/s to a batter who hits it straight back at him using 58500 N for 0.003 seconds, what is the velocity of the ball coming back to the pitcher
A solenoid that is 111 cm long has a cross-sectional area of 13.8 cm2. There are 958 turns of wire carrying a current of 7.62 A. Calculate the energy density of the magnetic field inside the solenoid
The centers of a 11.0kg lead ball and a 150g lead ball are separated by 7.00cm. What gravitational force does each exert on the other
An RLC circuit with R = 20.4? , L = 355mH , and C = 48.8?F is connected to an ac generator with an rms voltage of 21V, Determine the average power delivered to this circuit when the frequency of the generator is twice the resonance frequency
In order to manufacture these coffee tables, the company would need to incur $525,000 in fixed costs for new equipment. Calculate the break-even point of the coffee tables in units sold.
The four masses shown in the figure are connected by massless, rigid rods, Find the coordinates of the center of gravity
What are the x-component and y-component of the velocity.
The magnitude of the force of friction acting on the block between A and is 1.2N and points A and B are 0.5 m apart. If the kinectic energies of the block at A and B are 4J and 5.6 J, respectively, how much work is done on the block by the force p..
A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 91 cm from the center of the mirror, What is the magnification of the pencil's image
A certain atom of has 81 protons. Assume that the nucleus is a sphere with radius 6.99 fm, compute the magnitude of the electric field produced by the protons
A force vector points at an angle of 64.9 ° above the +x axis. It has a y component of +276 Newton's (N). Find out (a) magnitude and (b) x component of the force vector.
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