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Q. On a highway curve with radius 80m, the maximum force of static friction (centripetal force) that can act on a 1,000kg car going around the curve is 8,000N. What speed limit should be posted for the curve so that cars can negotiate it safely?
Q. A 5.2 {rm cm}-thick layer of oil (n; =; 1.46) is sandwiched between a 1.3 {rm cm}-thick sheet of glass and a 2.5 {rm cm}-thick sheet of polystyrene plastic (n ;=; 1.59).How long (in {rm ns}) does it take light incident perpendicular to the glass to pass through this 9.0 {rm cm}-thick sandwich?
An 18.0 g rifle bullet travelling 245 m/s buries itself in a 3.50 kg pendulum hanging on a 3.00 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
A toy cork gun contains a spring whose spring constant is 10.02 N/m. The spring is compressed 5.0 cm and then used to propel a 6.00 g cork. The cork, however, sticks to the spring for 1 cm beyond its unstretched length before separation occurs. The m..
A 0.157kg ball is thrown straight up from 1.94m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time.
A proton is travelling to the right at. It has a head-on perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton. What are the speeds of each after the collision? What is the direction of the pro..
What is the coefficient of static between crate and incline
You travel from "point" Columbia to St. Louis in a car moving at a constant speed of 60 km/h. Then you travel back from St. Louis to Columbia the same distance moving at a constant speed of 120 km/h.
At 500°C, the diffusion coefficient of Zn in brass is 4.10-17 m2.s-1. What is the flux of Zn moving down the rod.
One mole of an ideal gas at 27 °C is expanded isothermally from an initial pressure of 3 atm to a final pressure of 1 atm in two ways. (a) reversible, and (b) against a constant external pressure of 1 atm. find q, w, ΔU, ΔH, ΔSsys, ΔSsurr, ΔStotal..
A fully loaded station wagon has a mass of 1690 kg. If each of its four tires is inflated to a gauge pressure of 211 kPa, what is the total tire area in contact with road.
if oxygen molecules are more massive than the nitrogen molecules, is the rms speed of the O2 molecules greater than, less than, or euqls to rms speed of the n2 molecules.
An underwater diver sees the sun 58{rm ^circ} above horizontal. How high is the sun above the horizon to a fisherman in the boat above the diver.
The concrete encloses one steel reinforcing rod with cross-sectional area 1.00cm2. The rod joins two strong end plates. The cross-sectional area of the concrete perpendicular to the rod is 47.5 cm2. Young's modulus for the concrete is 3.00 x 10^10 N/..
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