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A motorist drives south at 20.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.00 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.00 min trip, find (a) the total vector displacement, (b) the average speed, and (c) the average velocity. Let the positive x axis point east.
One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 83.0 m. What is the wave speed at the top of the rope
The isotope 88224Ra of radium has a decay constant of 1.19×10-6 per second. What is the half-life (in days) of this isotope
Two in-phase loudspeakers that emit sound with the same frequency are placed along a wall and are separated by a distance of 5.00 m. What is the frequency of the sound
suppose we measure the resistance from one hand to the other and find it to be 2 kilo ohms. What is the resistivity of skin
A 0.73-kg mass is hanging from a spring with spring constant 13 N/m. What is the resulting period of the oscillation
Suppose that a point P in space-time with coordinates x = (x, x4) lies inside the backward light cone as measured in a frame S. This mean that x . x
Dorothy is up on her 14.0m by 18.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. Calculate the force on the roof
Determine the power distribution in carrier and sidebands if the transmitted power is 1,000 W and mf = 1.
Find the electric energy density between the plates of a 225-muF parallel-plate capacitor. The potential difference between the plates is 385V
A bullet weighting 10g is fired with a velocity of 088 m/s. After passing through a mud will 1m thick, its velocity decreases 10 100 m/s. Find the average resistance offered by the mud wall.
The tires on a mew car have a diameter of 2ft and are warranted for60 000 miles. determine the angle (in radians)through which one of these tires will rotate during the warranty period.
A 25 gram ball is fired with an initial speed v1 toward a 125 gram ball that is hanging motionless from a 1.25 meter string. The balls have a perfectly elastic collision. As a result, the 125 gram ball swings out until the string makes an angle of..
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