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Would life be different if the electron were positively charged and the proton were negatively charged? (b) Does the choice of signs have any bearing on physical and chemical interactions? Explain your answers.
Calculate the average force per nail when Sarah, who weighs 120 pounds, lies on a bed of nails and is supported by 600 nails
A car is traveling at 53.81 mph. The driver applies the brakes and the car decelerates at1.29 m/s2. What is the stopping distance in meters
A car drives north for 1km. Then it turns and drives 2 km at 30 degrees south of west. Finally the driver turns again and drives 0.5 km northwest. What is the total distance driven
A 60kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 2.3 m/s2, find the magnitude of the acceleration of the boy toward the girl.
A speeding motorist zooms through at 75km/h, without noticing a police car by the roadside. Calculate the speed of the police car when it catches the speeding motorist
The largest and smallest slits in these experiments are 0.16mm and 0.04mm wide, respectively. How many wavelengths wide are these slits
A red car and a green car, identical except for the color, move toward each other in adjacent lanes and parallel to an x-axis. At time t=0, the red car is at xr=0 and the green is at xg=220m. If the red car has a constant velocity of +20km/h, the car..
Determine how many seconds after the tennis ball is released the collision takes place. Determine the velocity of the tennis ball at the time of its collision with the rock.
light with a wavelength range of 145-295 nm shines on a silicon surface in a photoelectric effect apparatus, What is the longest wavelength of the light that will eject electrons from the silicon surface
A large parallel plate capacitor has plate separation of 0.98 cm and plate area of 230 cm2. How much work is done on the capacitor as the plate separation is increased to 1.96 cm
The lowest pressure ever obtained in a laboratory setting is 4.0Ã-10â 11 Pa. Part A At this pressure, how many molecules of air would there be in a 50 âC.
a garden hose is attached to a water faucet on one end and a spray nozzle on the other end. the water faucet is turned on, what is the pressure inside the hose
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