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Q. At the starting gun, a runner accelerates at 1.7 m/s^2 for 5.2 s. The runner's acceleration is zero for the rest of the race. What is the speed of the runner at t = 2.0;{rm{s}}?
Q. The rms speed of the molecules in 1.9g of hydrogen gas is 1600 m/s. What is the total translational kinetic energy of the gas molecules?
Status Newton's First Law of motion.
Perpetual motion machines have fascinated people especially inventors for hundreds of years before the laws of thermodynamics became known. Ideally, once energy is added to start a perpetual motion in machine, the machine would continue to operate..
compute the tension in the rope if the gymnast slides down the rope with a downward acceleration of magnitude 1.40 m/s^2 .
Iced tea is made by adding ice to 2.4 kg of hot tea, initially at 70?C. How many kg of ice, initially at 0?C, are required to bring the mixture to 10?C? (Lf = 3.33×105 J/kg, cw = 4,186 J/kg•? C)
How numerous extra electrons are on this particular oil drop (given the presently known charge of the electron)?
A bicycle wheel has a diameter of 64.1 cm and a mass of 1.81 kg. suppose that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 120 N is applied tangent..
How many wavelengths are there in one pulse
How far from the point of the drop will the rock hit the ground.
White light containing wavelengths from 405 nm to 760 nm falls on a grating with 8000 lines/cm. How wide is the first-order spectrum on a screen 2.20m away.
What is the pressure (in kPa) exerted by an object that has a base which is 2cm by 4cm nd a weight of 45N.
The coefficient of kinetic friction between block and ramp
What are vertical and horizontal components of the ball's momentum immediately after striking the crossbar. what is an average acceleration of the ball during this time interval.
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