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A lunar lander is making its descent to a moon base and descends slowly under the retro-thrust of its descent engine. The engine is cut off when the lander is 5.0 m above the surface with a downward speed of 0.8 m/s. With the engine off, the lander is in free-fall. What is the speed of the lander just as it hits the surface?
A magician wishes to create the illusion of a 2.97-m-tall elephant. He plans to do this by forming a virtual image of a 38.0 cm tall model elephant with the help of a spherical mirror. How far from the mirror will the image be formed
Assume that the speed of light in a vacuum has the hypothetical value of 7.32 m/s. In a pickup baseball game, who is standing at home plate
if harry's dog weighs 25N and harry lifts him up to a height of 10 meters, how much work does Harry do
An arteriole has a length of 1.25 mm and a radius of 21.9 (mili meter) The blood pressure drop along the arteriole is 1310 Pa. Calculate the flow rate through the arteriole
The wavelength of red helium–neon laser light in air is 632.8 nm. What is its frequency? What is its speed in the glass?
Point charges q1=+2.00?C and q2=?2.00?C are placed at adjacent corners of a square for which the length of each side is 4.50cm, What is the electric potential at point b
A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect a bat can detect
a truck horn emits a sound with a frequency of 245 hz. the truck is moving on a straight road with a constant speed.
A spherical balloon has a radius of 6.75m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. Determine the largest mass of cargo the balloon can lift
Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride. how much work does Sam do to stop it
The mass of Venus is 80% that of Earth while its radius is 95% that of Earth. What is the value of the acceleration due to gravity on Venus
A solid sphere is released from height h from the top of an incline making an angle ? with the horizontal. Calculate the speed of the sphere when it reaches the bottom of the incline in the case that it rolls without slipping
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