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standing on the sidewalk next to your parked car you hear thesiren of an approaching fire engine. the transmitted frequency ofthe approaching fire engine is 1200 Hz but you hear a frequency of1363Hz. It is a very hot day with the air temp at 100 F.
a) what is the velocity of sound in air
b) what is the speed of the approaching fire engine inkm/h?
a ball has a diameter of 3.90 cm and average density of 0.0844gcm3. what force is required to hold it completely
an m1 8.0 kg box lies on a friconless table and is attached to a m2 5.0 kg box by a light cord passing over a
How much work is required to bring three protons, initially infinitely far apart, to a configuration where each proton is 1.3 10-15 m from the other two
suppose a car is traveling at 16.3 ms and the driver sees a traffic light turn red. after 0.592 s has elapsed the
Illustrate what is the minimum centripetal acceleration the truck must have going around the circular curve with radius 0.35 km so that it will clear the gully and land on the other side?
Venus has a mass of 4.86x10^24 kg and a radius of 6.05x10^6 m. What is the acceleration due to gravity on Venus
A very narrow hole is drilled all the way through the Earth (through its center) and evacuated (i.e. there is neither air resistance nor friction). A small object of mass m is dropped into the hole at the surface.
A speedboat starts from rest and accelerates at +2.01 m/s2 for 7.00s. At the end of this time, the boatcontinues for an additional 6.00s with an acceleration of +0.518m/s2. Following this, the boat accelerates at -1.49m/s2 for 8.00s.
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 151 N on the wire. The left section of the wire makes an angle of..
A beam of unpolarized light (at wavelength 550 nm) is incident normally on the face of a sapphire (Al2O3) crystal which is 1 cm thick. The optic axis of the crystal is at an angle of 60 ? with respect to the normal to the incident face. At the..
A 6.00 kg mass (m) is suspended from a 65 kg flywheel having a radius of 0.75 m. Determine the angular acceleration of the flywheel as the mass falls
A 5.00 kg ball, moving to the right at a velocity of +2.00 m/s on afriction less table, collides head-onwith a 7.50 kg ball moving with a velocity of -1.00 m/s. Find the final velocities of the ball if the collision is a) elastic, and b) completel..
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