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Q. An object is located 13.0 cm in front of a convex mirror, the image being 7.40 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location. The image of this second object has the same height as the other image. How far in front of the mirror is the second object located?
Q. How many 111 W lightbulbs can you use in a 107 V circuit without tripping a 16 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 107 V.)
Three children each of weight 356N make a long raft by lashing together logs of diameter 0.30m and length 1.8m. how many logs will be needed to keep them afloat in fresh water. take density of the logs to be 800kg/m^3.
Two students are on a balcony 18.30 m above the street. One student throws a ball, b1, vertically downward at 16.80 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed.
A car of mass 1110 kg travels at a speed of 20 ms-1 along a straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.83. Take the acceleration due to gravity to ..
What is an average acceleration of the dragonfly
Obtain an expression for the velocity
The incident electron loses energy The incident electron emits an x-ray.
A 2.50 syringe has an inner diameter of 4 , a needle inner diameter of 0.24 , and a plunger pad diameter (where you place your finger) of 1.2 cm. A nurse uses syringe to inject medicine into a patient whose blood pressure is 140/100.
The G string of a guitar which should be 397 Hz is playing flat at 380 Hz. What percentage change in the tension of the wire is necessary so as to tune the string to 392 Hz.
A 1200 kg car carrying four 84 kg people travels over a rough washboard dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
What is the difference between voltage current characteristics for intrinsic and extrinsic semiconductor in both forward in addition to reverse direction.
What is the maximum amount of energy the incident electron can lose in elastically in this collision? What is left over energy of the electron.
To which, according to the rotational analog of Newton's second law, is the angular acceleration experienced by an object directly proportional?
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