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A moving, and accelerating, streetcar travels 20.0 m during a street crossing in 2.40 s. It continues to accelerate after this crossing until it reaches a speed of 32.0 m/s. If the streetcar’s acceleration is 1.60 m/s2 at all times, how long, in time, after this crossing does the streetcar reach that speed of 32.0 m/s? (Note that the streetcar's initial speed at the start of the crossing is not zero; it is already moving when it first enters the crossing.)
A 22 particle is moving to the left at 26m/s. How much net work must be done on the particle to cause it to move to the right at 51m/s
for distant stars astronomers estimate the distance by comparing the intensity of light coming from these stars with
The work function for platinum is 6.35 eV. Convert the value of the work function from electron volts to joules. Find the cutoff frequency for platinum.
If you input the function x[n]=0,1,0,1,0,1,0,1,0,1 into a digital filter with impulse response h[m]=1,0,1, what is the output function y[n] of the filter
An electron is accelerated to speed of 1.5*10^8 m/s. at that speed, compare the relativistic results to classical results for , find the electron rest energy according to the relativistic laws
A 3.4-cm-diameter parallel-plate capacitor has a 1.8mm spacing. The electric field strength inside the capacitor is 1.3×105V/m, What is the potential difference across the capacitor
A 400kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Find out the force exerted by the man.
A total of 2.83·106 electrons are placed on an initially uncharged wire of length 1.07 m. What is the magnitude of the acceleration of a proton
At what temperature is the speed of sound in helium (ideal gas, = 1.67, atomic mass = 4.003 u) the same as its speed in oxygen gas at 11.0 oC? The speed of sound in oxygen at 11.0°C is 322 m/s.
A spacecraft is traveling with a velocity of v0x = 4330 m/s along the +x direction. Two engines are turned on for a time of 728 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.74 m/s2.
Atmospheric boundary layer is of typical height of 1 km. Is atmospheric flow in this layer laminar or turbulent? Justify your answer with typical properties such as wind speed and viscosity of air.
The U.S. Food and Drug Administration limits the radiation leakage of microwave ovens to no more than 5.0 m W/cm2 at a distance of 2.00 in. A typical cell phone, which also transmits microwaves, has a peak output power of about 2.0 W.
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