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Q. what is average magnitude of the pointing vector 8.00m from a radio transmitter broadcasting isotropically with an average power of 250 kw?
Q. A merchant in Katmandu sells you a solid gold 1 kg statue for a very reasonable price. When you get home, you wonder whether or not you got a bargain, and so you lower the statue into and container of water and measure volume. What volume of displaced water will verify that it's pure gold?
In heavy rush-hour traffic you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally you drive at 15 m/s for another 2.5 minutes. compute the average velocity between t=0 and t=7.5 minutes.
What mass (in grams) of steam at 100 C must be mixed with 175 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 50.0 C.
A car is behind a truck going 25m/s on the highway. The car's driver looks for an opportunity to pass, guessing that his car can accelerate at 1.0m/s2. He gauges that he has to cover the 20-m length of the truck, plus 10m clear room at the rear of..
Rank the magnitudes of the forces exerted on the following particles from largest to smallest. In your ranking, display any cases of equality. (Use only ">" or "=" symbols. Do not contain any parentheses around the letters or symbols.)
A projectile is shot from the edge of a cliff h = 105 m above ground level with an initial speed of v0 = 135 m/s at an angle of 37.0Â ° with the horizontal.
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
Write x-versus-t equations of motion
A certain particle has the life time of 10^-7 s, while measured at rest. How far does it go before decaying if its speed is 0.99 c when it is created.
Whats the coefficient of the kinetic friction of the tire. What is the acceleration of the car.
A man of mass 65 kg falls stiff-legged straight down from a height of 2m. He lands on one foot. The femur is a bone in the leg with the length L=.65m, and a cross-sectional area of about 2.0 x 10^-4m^2. The Young's modulus for bone is 9.4x 10^9 N/..
Green light (λ = 546 nm) strikes a single slit at normal incidence. What width slit will generate a central maximum that is 3.00 cm wide on a screen 1.76 m from the slit.
What is the maximum positive potential energy. Write down an expression for U as a function of x, with U in joules and x in meters.
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