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A student places an object on the 5.0 cm mark of the meter stick. He places a positive lens that he knows has a focal length of 15.0 cm at the 30.0 cm mark on the meter stick. He now places a negative lens of unknown focal length at the 60.0 cm mark. He finds that there is a real image focused on the screen at the 90.0 cm mark of the meter stick. From the data what is the focal length of the negative lens?
A 0.174kg softball is pitched horizontally at 26m/s. the ball moves in the opposite direction at 38m/s after it is hit by the bat.
A horse races once around a circular track in a time of 118s, with a speed of 17 m/s. What is the radius of the track? How do you go about solving this.
Find out the minimum acceleration of the antelope.
Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 2.4m
A 32.2 uF capacitor is connected to a 50.2 ohm resistor and a generator whose rms output is 37.2 V at 50.0 Hz. Calculate the rms current in the circuit. Calculate the phase angle for the circuit
While on a camping trip, you would like to carry water from the lake to your campsite. find Which bucket holds more water
A digital cell phone emits a 1.9 GHz electromagnetic wave with total power 0.60 W. At a cell phone tower 2.0 km away: What is the energy of an individual photon
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown, What is the y component of the ball's velocity
The eyepiece of a refracting telescope (see Fig.34.53 in the textbook) has a focal length of 9.00 cm. What is the angular magnification of the telescope
If a circular wire loop of radius 10 were held in this magnetic field, what current would be induced in the loop
A thermos contains 125 cm3 of coffee at 85° C. To cool the coffee, you drop two 13-g ice cubes into the thermos. The ice cubes are at first at 0° C and melt completely. What is the final temperature of the coffee? Treat the coffee as if it were wa..
A typical person radiates about 62 W of power at room temperature. Given this result, how long does it take for a person to radiate away the energy obtained by consuming a 230-calorie doughnut.
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