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A 1 048-kg satellite orbits the Earth at a constant altitude of 101-km.
(a) How much energy must be added to the system to move the
satellite into a circular orbit with altitude 208 km?
MJ
(b) What is the change in the system's kinetic energy?
MJ
(c) What is the change in the system's potential energy?
MJ
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An 70 kg running back has a football and is making a break for a touchdown at 9 m/s. On his way, a 126 kg linebacker running in the opposite direction at 4 m/s collides with him for the tackle. How much kinetic energy is lost in this collision?
Round intermediate answers to four significant figures and final answers to three significant figures for best accuracy.
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Find the acceleration of a 2500 kg truck that has a force acted on by its wheels of 7kN. A force of friction of 1500 N is also acting on the truck.
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Describe why capacitors and inductors give delay.
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Why are dedicated PCC based care facilities such as Eden Homes, Green Houses and Wellspring Model Homes or comparable facilities limited in Canada? What is needed to allow for establishment of such facilities?
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An electron is moving through a magnetic field whose magnitude is 8.70x 10^-4T. The electron experiences only a magnetic force and has an acceleration of magnitude 3.50 x 10^14m/s^2. At a certain instant, it has a speed of 6.80 X 10^6 m/s^2. Determine the angle (less than 90 degrees) between the electrons velocity and the magnetic field.
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PLEASE TYPE THE ANSWER AND KEEP IT SHORT AND SIMPLE!!!! DO NOT COPY OTHER ANSWERS!
Contrast Newton's model of the universe with the descriptive models of Ptolemy, Copernicus, and Kepler.
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How do you normalize the function psi= eim(phi) between 0 and 2pi?
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1) An electron passes through a point 3.15 cm from a long straight wire as it moves at 33.9% of the speed of light perpendicularly toward the wire. The wire carries a current of 18.9 A. Find the magnitude of the electron's acceleration at that point.
acceleration:____________ m/s2
2) A beam of protons is directed in a straight line along the positive ?‑direction through a region of space in which there are crossed electric and magnetic fields. If the electric field magnitude is ?=430 V/m in the negative ?‑direction and the protons move at a constant speed of ?=9.1×105 m/s, what must the direction and magnitude of the magnetic field be in order for the beam of protons to continue undeflected along its straight-line trajectory?
Select the direction of the magnetic field ?
a) positive y‑direction
b) negative ?‑direction
c) negative ?‑direction
d)positive ?‑direction
e) negative ?‑direction
f) positive ?‑direction
Magnitude of the magnetic field ? :________________T
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A major leaguer hits a baseball so that it leaves the bat at a speed of 33.0 m/s and at an angle of 37.3 ∘ above the horizontal. You can ignore air resistance a.At what two times is the baseball at a height of 10.2 m above the point at which it left the bat? b. Calculate the horizontal component of the baseball's velocity at an earlier time calculated in part (a). c. Calculate the vertical component of the baseball's velocity at an earlier time calculated in part (a). d.Calculate the horizontal component of the baseball's velocity at a later time calculated in part (a) e. Calculate the vertical component of the baseball's velocity at a later time calculated in part (a) f. What is the magnitude of the baseball's velocity when it returns to the level at which it left the bat?
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A 1.5-mole sample of an ideal gas is gently cooled at constant temperature 320 K. It contracts from initial volume 19 L to final volume V2. A total of 1.2 kJ of heat is removed from the gas during the contraction process. What is V2? Let the ideal-gas constant R = 8.314 J/(mol • K). 14 L 10 L 12 L 16 L
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Describe a theory that explains how the electric force occurs without contact. Give an everyday analogy. (Not the tape phenomenon.)
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During the power stroke of an internal combustion engine, the air-fuel mixture is ignited and the expanding hot gases push on the piston. Fuel efficiency is maximized in this process when the ignited gas is as hot as possible, the gas expands allowing a maximum amount of work to be done, and cooled exhaust gas is released at the end of the cycle. Assuming the engine exhibits the highest efficiency possible, which of the following statements concerning the exhaust gas must be true to avoid violating the second law of thermodynamics?
The exhaust gas must be cooled to the same temperature as the outside air.
The exhaust gas must be at the same pressure as the outside air.
The exhaust gas must be hotter than the outside air temperature.
.
The exhaust gas must be at the same volume as the outside air.
A tray of water is placed into a freezer. As the water cools, its entropy decreases and eventually it turns to ice. Why doesn’t this process violate the second law of thermodynamics?
The entropy of the water decreases, but upon freezing it increases to its previous value.
The process as described does violate the second law of thermodynamics.
The overall entropy increases due to the refrigerator chilling and eventually freezing the water.
When the ice is later taken out and melted, the entropy will increase back to what it was before the tray was put into the freezer
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Search online or your book for hypothesis' of "how did the Moon form". What is the evidence for each hypothesis?
Did it form at the same time as the Earth and in orbit like it is now?
Was the Moon ever closer to Earth?
In a million years, about how far away will the Moon be from Earth?
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