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Q. A bat at rest sends out ultrasonic sound waves at 59 kHz and receives them returned from an object moving directly away from it at 25m/s. What is the received sound frequency?
Q. A blacksmith drops a 0.60kg iron horseshoe into a bucket containing 25 kg of water.
If the initial temperature of the horseshoe is 600?C, and initial temperature of the water is 40?C, what is the equilibrium temperature of the system? Suppose no heat is exchanged with the surroundings.
Why is surface wind always directed at some angle across sea-level isobars toward lower pressure? Why is the surface wind directed across the sea-level isobars at a greater angle in Madison than over the middle of Lake Michigan.
The human body can survive a negative acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250 m/s^2.
Find the resulting angular speed of the disk (in rad/s) and describe the direction of rotation.
A hunter aims directly at a target (on the same level) 140 m away.
A 11.0g bullet is fired horizontally into a 103g wooden block that is firstly at rest on a frictionless horizontal surface and connected to a spring of constant 154N/m. The bullet becomes embedded in block. If the bullet-block system compresses the s..
Light is diffracted when it passes through a narrow single slit. What happens to the width of the central maximum in the diffraction pattern when the width of the slit trough which light passes is reduced.
An object is 22 cm in front of a diverging lens that has a focal length of -13 cm. How long in front of the lens should the object be placed so that size of its image is reduced by a factor of 4.
how to Assume the protons started from very far away. Need X and Y componet.
A stationary radar operator determines that a ship is 17 km south of him. An hour later the same ship is 21 km southeast. If the ship moved at constant speed and always in the similar direction, what was its velocity during this time.
W hat is balls initial speed
What is the velocity of q_{2} when the balls are 0.450 m apart. what is the speed that the bar falls.
Find out the normal force exerted on the crate by the elevator.
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