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Question1
A spark plug in a car has electrodes unconnected by a gap of 0.023 in. To make a spark and ignite the air-fuel mixture in the engine, an electric field of 4.1 106 V/m is required in the gap. (a) What potential difference should be applied to the spark plug to initiate a spark?
Question2
An archer puts a 0.34 kg arrow to the bowstring. A force of 191 N is necessary to draw the string back 1.3 m. Assume that air resistance is negligible.
(a) Assume that all the energy goes into the arrow, with what speed does the arrow leave the bow? m/s
(b) If arrow is shot straight up, how high does it rise?
Question3
The supersonic aircraft Concorde has a length of 61.2 when sitting on the ground on a typical day while the temperature is 12.0. The Concorde is primarily made of aluminium. In flight at twice the speed of sound, friction with the air warms the Concorde's skin and causes the aircraft to lengthen by 27.0. (The passenger cabin is on rollers, so the airplane expands around the passenger cabin.)
Take coefficient of linear expansion for aluminium to be = 2.40×10-5.
An alpha particle (the nucleus of a helium atom) consists of two protons and two neutrons. what is the strength of the magnetic field
Camera A has a lens with an aperture diameter of 8.30mm, What exposure time should be used with camera B in photographing the same object with the same film if this camera has a lens with an aperture diameter of 23.5mm
The filament of a light bulb has a temperature of 2.64 x 103 °C and radiates 60.0 W of power. The emissivity of the filament is 0.388. Find the surface area of the filament
What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road.
A certain laser emits light in a narrow band of wavelengths centered at 632.7 nm and with a ''wavelength width'', What is the corresponding ''frequency width'' in hertz for the emission
A spring with a constant 150 N/m is attached to a block with a mass 1.5 kg. What is the maximum displacement the mass will achieve
Plutonium has a half life of 2.4 × 104 years. How long does it take for 99% of the plutonium to decay, What is the binding energy of the 4He nucleus
A worker pushed a 22 kg block 8.1 m along a level floor at constant speed with a force directed 39° below the horizontal. find the increase in thermal energy of the block-floor system
An electron with a speed of 7.98 × 108 cm/s in the positive direction of an x axis enters an electric field of magnitude 2.25 × 103 N/C, how much time will have elapsed
A certain car battery with a 14.0 V emf has an initial charge of 195 A•h. Assuming that the potential across the terminals stays constant until the battery is completely discharged, for how long in hours can it deliver energy at the rate of 184 W.
In a lightening bolt, current travels upward, from ground to cloud.Suppose that at the moment that a 35,000, what is the magnitude and direction of the magnetic force on the airplane
A metal sphere A has charge Q. Two other spheres, B and C, are identical to A except they have zero net charge. A touches B, then the two spheres are separated
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