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Q. A concave shaving mirror has a focal length of 95 cm. Calculate the image position of a cologne bottle placed in front of the mirror at a distance of 165 cm. Calculate the magnification of the image. Is the image real or virtual? Is the image inverted of upright? Draw a ray diagram to show where the image forms and how large it it with respect to the object.
Q. The rms speed of the molecules in 1.8 g of hydrogen gas is 1600 m/s. What is the total translational kinetic energy of the gas molecules?
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
300 J of work are done to compress the gas as, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules.
An infinite non conducting sheet has a surface charge density σ = +5.80 pC/m2. (a) How much work is completed by electric field because of the sheet if a particle of charge q = +1.60 × 10-19 C is moved from the sheet to a point P at distance d = 3.56..
An object, at the top of a very tall building, is released from rest and falls freely due to gravity. Neglect air resistance and compute distance covered by the object between times t1 = 5.5 s and t2 = 7.9 s after it is released.
What horizontal force acts on the puck after the push
A 2.8 kg block slides along a frictionless horizontal with a speed of 5.5 m/s. After sliding a distance of 8m, the block makes a smooth transition to a frictionless ramp inclined at an angle of 43 degrees to the horizontal. The acceleration of gravit..
The incident electron loses energy The incident electron emits an x-ray.
Find the distance from the positive plate
A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.
What is the third fragment right after the explosion
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
A car takes 16 s to go from v = 0 to v = 50 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
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