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In the ground state of hydrogen, the uncertainty in theposition of the electron is roughly 0.10 nm. If the speed of theelectron is on the order of the uncertainty in the speed, how fast is the electron moving?
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer i..
The Doppler effect can be used to measure flow rates in blood. A sound wave is transmitted into a vein or an artery, What is the expected frequency shift
You are on an unknown planet orbiting an unknown star. When the 108 cm long camera is pointed at the star an image is formed that is 1 cm in diameter, what is the diameter of the star
A highway curve with a radius of 555 m is banked properly for the car travelling 150 km/h. If a 1650 kg Porshe 928 S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid.
Two Styrofoam balls with the same mass m = 9.5 10-8 kg and the same positive charge Q are suspended from the same point by insulating threads of length L = 0.98 m (the figure below). The separation of the balls is d = 0.026 m. What is the charge Q?
Suppose Q and nQ are charges that are seperated from origin by -L and oL and the origin and that the origin as at a point of electrostatic equilibrium between them
An automobile has a total mass of 1700 kg. It accelerates from rest to 40 km/h in 10 s. Assume each wheel is a uniform 32 kg disk. find the total kinetic energy of each wheel
q1. water at a temperature of 85f exhibits which of these physical propertiesa. has no definite shapeb. has no definite
A particle having a mass of 0.200 g carries a charge of ?2.34×10^?8 C. What are the magnitude of the minimum magnetic field that will balance the earth's gravitational pull on the particle
Calculate the minimum angle above the horizontal at which Hiawatha must aim in order to outrun the arrow.
An LC circuit oscillates at a frequency of 19.7 kHz. What is the maximum charge (in C) on the capacitor
A 150 g mass hangs from a fishing line. If it falls and accelerates at 4.0 m/s^2, what is the tension in the fishing line
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