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A 850kg electric car uses a 270 V battery pack. As the car accelerates from rest, 420C flows from the battery.
What's the maximum speed the car can attain during this time? (The actual speed will be less, due to friction and other losses.)
Suppose there is an astronaut who is traveling at a significant fraction of the speed of light. How long does it take according to the astronaut in years
The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute. How much does the brain's mass increase in one day? How long does it take for the brain's mass to increase by 0.0045 kg ?
a ship's horn can be heard above typical background noise if at intensity level 20 dB. what must be the power of the horn's output to achive this level at 5.0 km away
an object is at a distance d to the left of a flath screen. A converging lens with focal length f
An aluminum wire with a cross-sectional area of 3.9 x 10^(-6) m^2 carries a current of 1.9 A. Find the drift speed of the electrons in the wire
A women's high-heeled shoe has an area of 0.5 cm2. Assuming that the woman wearing the shoe has a mass of 52 kg, what is the pressure that the heel exerts on the floor
An object of mass "m" is thrown up an inclined plane of angle "theta" with an initial velocity "v knot". If the motion is resisted by retarding force Fr=-kv (where k is a force coefficient and v the velocity of the object.)
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 7.948 g, is pressed into a leaf of 1.547 m thickness.
A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center O. How many radians does the cylinder rotate through in the first 5.0 seconds, if it starts from rest
christian ramirez a small 0.12kg metal ball is tied to a very light sting 0.80m long to form a pendulum that is then
In a PET scan, an electron and positron annihilate each other, creating two (massless) photons. What is the kinetic energy of each photon in this case
What is the magnitude of the magnetic field that the spectrometer uses? In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery
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