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A 56 kg astronaut stands on a bathroom scale inside a rotating circular space station. The radius of the space station is 250 m. The bathroom scale reads 42 kg. At what speed does the space station floor rotate?
A 1500 kg blue car was travelling at 90 km/h. A 1200 kg red car was traveling behind the blue car at 108 km/h.when the two cars were 55 m apart, the blue car began braking.it took the driver of the red car 0.50 s to start braking her car. If the ..
Four equal point charges, Q, are fixed at the corners of a square of side b. (a) What istheir total electrostatic potential energy? (b) How much potential energy will a fifth charge, Q, have at the center of the square (relative to V=0 a r =∞)?
A large block 19.0 cm wide, 20.0 cm long, and 24.00 cm high of mass 4.55 kg. This block is passing through air (density ?air = 1.43 kg/m3). Calculate the terminal velocity of the block
A sphere of radius 2.34 cm and a spherical shell of radius 7.47 cm are rolling without slipping along the same floor. what should the ratio of the sphere\'s angular speed to the spherical shell\'s angular speed be
We all know that your homes have primary voltage Vp 120V that comes to them, What type of transformer is needed to reduce the voltage
An airplane flies due north in a region where Earth's magnetic field has magnitude 5.3×10?5T, declination 0?, and inclination 75?. What's the induced emf between the wingtips, 36 m apart, when the plane flies at 230m/s
An object is projected horizontally at 8.0m/s from the top of a 122.5 m cliff. How far from the base of the cliff will the object strike the ground
A block of iron of mass 3.00 kg is charged positively with the net charge of 0.010 C. How many electrons are lost from the neutral iron to be charged this much
A flat observation screen is placed at a distance of 4.5 m from a pair of slits. The separation on the screen between the central bright fringe and the first-order bright fringe is 0.043 m. Determine the slit separation
The image produced by a concave mirror is located 25 cm in front of the mirror. How far in front of the mirror is the object located
Lasers have been developed that can generate pulses of light that are only 10 fs (femtoseconds) long. Compute how many photons are there in each pulse
A solid sphere of uniform density has a mass of 9.0 ×104 kg and a radius of 2.7 m. What is the magnitude of the gravitational force due to the sphere on a particle of mass 9.6 kg located at a distance of (a) 8.1 m and (b) 1.2 m from the center of the..
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