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A roller coaster car of mass 1102 kg slides on a frictionless track starting at a distance 19.2 m above the bottom of a loop 15 m in diameter. The acceleration of gravity is 9.81 m/s2 If friction is negligible, what is the magnitude of the force of the track on the car when the car is at the top of the loop? Answer in units of N.
Two objects of the same mass, m = 1.00 kg, are projected towards each other. The first object initially has velocity (20.0m/s)i^. What is the change in kinetic energy in the collision
A recording engineer works in a soundproofed room that is 39.4 dB quieter than the outside. what is the intensity outside
What is the direction of the electric field along the positive zsemi-axis (vertical) if the field is created by: a uniformly charged circle in the x-y plane with the center atthe origin; a uniformly positively charged wire along the x axis;
An airplane is flying horizontally in a region where the earth's magnetic field is 5.2x10-5 T at an angle 60 deg below the horizontal. what is the potential difference between the wing tips
Electrons accelerated by a potential dissimilarity of 12.89 V pass during a gas of hydrogen atoms at room temperature. Compute the wavelength of light emitted with the longest possible wavelength
A solid disk rotates at an angular velocity of 0.036 rad/s with respect to an axis perpendicular to the disk at its center. what is the angular velocity of the disk
Explain why a traction elevator uses a counterweight and discuss how they set the mass of the counterweight (reference to Newtons' 2nd law of translation).
A stone is thrown vertically downward at an initial speed of 14 m/s from a height of 65 m above the ground. (a) How far does the stone travel in 2.0 s? (b) What is the velocity now before it hits the ground?
A solid, uniform ball rolls without slipping up a hill, How fast is it moving just before it lands and How far from the foot of the cliff does the ball land
Two capacitors give an equivalent capacitance of 10.00 pF when connected in parallel and an equivalent capacitance of 1.70 pF when connected in series. What is the capacitance of each capacitor
A 0.423 kilogram block of wood hangs from the ceiling by a string, and a 0.0692 kilogram wad of putty is thrown straight upward, Find how high does the putty-block-system rise above the original position of the block
On Planet X, the pressure at a depth of 2.00 m below thesurface of a liquid nitrogen lake, the pressure is5.00*10^5N/m^2. What is the atmospheric pressure at the surface of the lake
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