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One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 3.00 km. They start at the west side of the lake and head due south to begin with.
(a) What is the distance they travel?
km
(b) What are the magnitude and direction (relative to due east) of the couple's displacement?
magnitude km
direction ° north of east
A certain cable car in San Francisco can stop in 10s while travelling at maximum speed. On one occasion, driver sees a dog a distance d m in front of the car and slams on the brakes instantly.
In a parallel circuit I=10.0A. There are 4 resistors. R1=13ohms R2=7ohms R3=15ohms R4=21ohms. What is the voltage drop across each resistance
A 62.00kg student is standing atop a spring in an elevator that is accelerating upward at 3.8 m/s2. The spring constant is 2600-N/m. By how much is the spring compressed.
An extension cord made of two wires of diameter 0.129cm (no. 16 copper wire) and of length 2.2m is connected to an electric heater which draws 17.0 A on a 120V- line, How much power is dissipated in the cord
A double convex lens (convex on both sides) is made of glass with an index of refraction of 1.65. What is the magnitude of the larger radius
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 9 m in an evacuated chamber. Find the difference in final speeds of the two spheres
Two boys are sliding toward each other on a frictionless, ice-covered parking lot. Jacob, mass 45 kg, is gliding to the right at 7.67 m/s, What is their velocity immediately there after
A stationary particle of charge q = 2.6 × 10-8 C is placed in a laser beam whose intensity is 2.3 × 103 W/m2, find the maximum magnitudes of electric forces
An LC circuit is built with a 50mH inductor and an 8.0pF capacitor, The capacitor voltage has its maximum value of 40V at t=0s, What is the inductor current at that time
An unmarked police car, travelling a constant 94 km/h, is passed by the speeder travelling 153 km/h. precisely 0.70 s after the speeder passes, policeman steps on the accelerator. If the police car's acceleration is 2.30 m/s^2, how much time elapses ..
Two, concentric, thin spherical shells of radii R1 = 40.8 cm and R2 = 51.0 cm are uniformly charged with a total charge Q1 = â€"50.5 μC, What is the potential of the outer shell
Assume the magnitude of the charge of particle is 100 mC, its mass is 0.03 g and its velocity is 2000 m/s, What is its radius of curvature of particle in the magnetic field
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