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A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.79 s after the first, and the third echo arrives 0.987 s after the second. Assuming that the speed of sound is 343 m/s and that there are no reflections of sound from the ground, find the distance (in m) between the cliffs.
A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 2.7 m/s. Through how various revolutions has the soccer ball turned as it moves a linear distance of 16 m.
An astronaut stands on the steps of her spaceship that is resting on the surface of planet x and drops a rock from a height of 4.5 metres. The rock hits the surface in 0.83 s. Determine the magnitude of the acceleration due to gravity on the surfa..
an object can be hung from a string with a linear mass density of 0.00200 kg/m that passes over a light pulley. What is the frequency of the vibrator
Where does package hit the ground relative to the point
Does current through a power supply increase when parallel bulbs are added? For example, if you have a circuit with one bulb and measure the current through the bulb to be 100 mA, what is the current through the power source when you add another b..
A person can survive a feet-first impact at the speed of about 12 m/s (27 mi/h) on concrete; 15 m/s (34 mi/h) on soil; and 34 m/s (76 mi/h) on water. Why are there different values for different surfaces.
The temperatures indoors and outdoors are 297 and 311 K, respectively. A Carnot air conditioner deposits 6.22 105 J of heat outdoors. How much heat is removed from the house?
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom, of area 2.45m2 , exerted by the water and air inside the tank and the air outside the tank
Explain what is the force felt by the electrons and the nuclei in the rod when the external field described in the problem introduction is applied?
You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, Find the net downward force on the tank's flat bottom
Sea birds tuck in their wings and dive straight down into the water when hunting for fish near the surface. If a pelican starts a dive from 16.0 m, with what speed will it strike the water
A bicycle racer is traveling at 10 m/s with an acceleration of 0.5 m/s^2. The radius of the bicycle wheel is 33 cm. What is the angular velocity of the bicycle wheels
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