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a car mass 200 kg moving at 30 m/s is braked suddenly, withconstant braking force of 10000 N. How far does the car go before stopping?
On a certain amusement park ride, passengers are seated in a horizontal circle of radius 7.5m. the seats begin to rotate from rest and are uniformly accelerated for 21 seconds to a most rotational speeds of 1.4 rad/s.
Explain the relationship between the tilt of the Earth’s axis and the fact that we have seasons and the seasonal variation in the length of the day. What would happen to the seasons and the day length of the 23.5° tilt were reduced to 0°?
A slab of a thermal insulator with a cross-sectional area of 110{\rm cm^2} is 2.90{\rm cm} thick. how much heat flows through the slab
A surface encloses the charges q1=3.4uC , q2=7.0uC, and q3=-3.8uC. Find the electric flux through this surface
A photon having E = 12.5 keV energy scatters from a free electron inside a metal. At which angle will the electron scatter
The spacing between the plates of a 1.0x10^-6F capacitor is 0.05mm. what is the surface area of the plates
A car is driving directly north on the freeway at a speed of 118 km/h and a truck is leaving the freeway driving 89 km/h in a direction that is 39° west of north
A zoom lens has a focal length that varies from 30 to 200 mm. Which setting will make the subject look the largest Which setting will include the widest angle of field
A car is traveling at 8.43 km/hr. The tires have a radius R = 38:4 cm. (a) What is the angular speed of the tire (in SI units)? (b) What is the centripetal acceleration (m/s^2) of a piece of tire on the outer edge?
Two point charges 3.0cm apart have an electric potential energy -130J . The total charge is 15nC. What is the lesser charge
A rectangular antenna has a height of 3m and a width of 6 meters. It operates at a frequency of .5 GHz. What are the two half-power angles
A hollow, thin-shelled ball of mass m rolls along a horizontal surface with a translational speed of v. What percent of its total kinetic energy is translational
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