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As the police car approaches a brick wall it emits a sound at 800Hz. The speed of the car is 100km/h. Find the beat frequency recorded by the driver of the police car as it approaches the wall. (Take the speed of sound 340m/s)
A car has 53% of its weight on its front wheels and 47% on its rear wheels, How far from the rear axle is the car's center of gravity
You drive 110 km/h east for 35 min, then 83 km/h north for 46 min. Find your average velocity for the entire trip
What is the magnitude of the electric field. A 50-gram super ball traveling at 25m/s is bounced off a brick wall and rebounds at 22 m/s. A high speed camera records this event. If the ball is in contact with wall for 3.5 ms, what is the average acc..
Calculate the pressure at the center of pipe A. Suppose T = 10?C.
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 2.60 cm. What is the work done by the field on the electron
A small circular loop of wire of radius 5.0 cm and resistance R = 1.7 10-3 Ω is centered inside a large circular loop of wire of radius 50 cm, Find the average current in the smaller loop during this time interval
A very large number (N+1) polaroids are arranged in a sandwich.
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
The electric potential is given by (50 V/m7)(xz6 + x3y4) in the region of space that includes the point (x,y,z) = (-2,7,-3) m
The inner surface is negative relative to the outer surface. Explain how much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
A flat circle of radius 20 cm is placed in a uniform electric field of magnitude 6.6×102N/C, What is the electric flux through the circle when its face is at 30 to the field lines
A laser beam in air is incident on a liquid at an angle of 38.0 with respect to the normal. What is the critical angle for total internal reflection for this fluid
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