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An early main objection to the idea that Earth is spinning on its axis was that Earth would turn so fast at the equator that people would be thrown off into space. Show the error in this logic with calculating
1. The weight of the person
2. The centripetal force on the person.
3. The speed of a 97 kg person at the equator. The radius of Earth is about 6400 km (needs to be in m)
A 3.0 m long wire carrying a current of 1.0 A through amagnetic field of magnitude 10.0T experiences a force of 4.0kN entirely due to the current passing through the magnetic field
Bats emit a wide variety of sounds, one type emits pulses of sound having a frequency between 39kHz and 78kHz. What is the range of wavelengths of this sound in air
W hat are underwater angles of refraction
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
what is the center of gravity? how can you find it in various objects? how dooes it effect the equilibrium of an
The rotational spectrum of the HCl molecule contains lines with wavelengths of 0.0604, 0.0690 ,0.0804 ,0.0964 , and 0.1204 mm. What is the moment of inertia of the molecule
A 18.0-kg projectile is fired at an angle of 60.0° above the horizontal with a speed of 73.0 m/s. How much energy is released during the explosion
A mass pulled by a constant force accelerates from 10 cm/s to 25 cm/s in 3.5 s. what is the magnitude of the second force
The typical operating voltage for anelectron microscope is V =50kV. (a) What isthe smallest feature one could hope toresolve? (b) What isthe equivalent resolution if neutrons are used?
A system has a heat source supplying heat at a rate of 187 W, At what rate is the internal energy of the system changing
A solid disk of radius R and mass 2.66 kg is spinning atangular velocity 64.7 rpm about a vertical axis. What is the mass of the second disk
A rectangular loop consists of N = 100 closely wrapped turns and dimensions a = 0.4m and b= 0.3m. What is the expected direction of rotation of the loop
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