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An electric vehicle starts from rest and accelerates at a rate of 2.5 m/s2 in a straight line until it reaches a speed of 29 m/s. The vehicle then slows at a constant rate of 1.2 m/s2 until it stops. (a) How much time elapses from start to stop? (b) How far does the vehicle move from start to stop?
You plan to fly a model airplane of mass 0.390 kg that is attached to a horizontal string. The plane will travel in a horizontal circle of radius 5.90 m. Find the speed at which you must fly the plane
you drive due east at 85km/h for 50min. then you follow a road going 60 degrees south of east, going 90km/h for another 30min. Find your total displacement
Red light of wavelength 673.0 nm produces photoelectrons from a certain photoemissive material. Green light of wavelength 515.0 nm produces photoelectrons from the same material with 1.50 times the maximum kinetic energy. What is the material's work ..
question1consider a tube filled with air at 17 degc and closed at both ends. let lengthnbspof the tube is 70 cm.nbsp a
two frisky grasshoppers collide in midair at the top of their respective trajectories and grab onto each other holding
The photoelectric threshold wavelength of a tungsten surface is 272 nm. What is the threshold frequency of this tungsten
Tritium ({}_1^3 {\rm{{\rm H})}} is an unstable isotope of hydrogen; its mass, including one electron, is 3.016049 {\rm u}. Determine the total kinetic energy of beta decay products
Consider the following two-step process. Heat is allowed to flow out of an ideal gas at constant volume so that its pressure drops from P1 = 2.5atm to P2 = 1.3atm, Calculate the total heat flow into or out of the gas
A 90.3-MHz radio wave is broadcast from KTUH's transmitter. how much time does it take for the radio wave to reach you
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 103 km and with a period of 47.0 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 24.9 km.
an uncharged capacitor and a resistor are connected in series to a source of emf. if 6.00 v c 21.0 microf and r 100
Suppose that charges on a dipole antenna oscillate slowly at a rate of 1 cycle/s, What is the magnitude of the Poynting vector
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