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An elevator is accelerating upward at 1.8m/s^2. Someone is standing on a bathroom scale in the elevator, and it reads 180lb. Use this equation to solve the problem: ma= -ma+F1+F2... to calculate the person's true weight.
A Carnot-efficiency engine operating between a reservoir of liquid mercury at its melting point and a colder reservoir extracts 15.0 J of heat from the mercury and does 4.0 J of work during each cycle. What is the temperature of the colder reservo..
A rocket of total mass 3180-kg is travelling in outer space with a velocity of 115 m/s toward the Sun.
Two loudspeakers in a 20°C room emit 629 Hz sound waves along the x-axis, If the speakers are out of phase, what is the smallest distance between the speakers for which the interference of the sound waves is constructive
Find the pressure difference on an airplane wing if air flows over the upper surface with a speed of 114 m/s , and along the bottom surface with a speed of 105m/s
A container is filled to a depth of 18.0 cm with water. What is the absolute pressure at the bottom of the container
Equipotentials between two parallel lines with a floating circular electrode: I dont need to know the exact potentials, What should be the potential inside the electrode
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom, of area 2.45m2 , exerted by the water and air inside the tank and the air outside the tank
Identical samples containing 32P are measured for a period of 1 hr in a counter having an efficiency of 44 percent and a negligible background. From a large number of observations, the mean number of counts in 1 hr is (2.93 x 10^4)
what is the maximum weight of the crate that the system can support? What is the angle needed for equilibrium.
The Earth can be approximated as a sphere of uniform density, rotating on its axis once a day. What is the moment of inertia of the Earth
A particle with a mass of 4.10 × 10-20 kg is oscillating with simple harmonic motion with a period of 2.9 × 10-5 s and a maximum speed of 2.3 × 103 m/s.
High-speed stroboscopic photographs show that the head of a 240-g golf club is traveling at 52 m/s just before it strikes a 46-g golf ball at rest on a tee. Find the speed of the golf ball just after impact
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