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Determine the magnification of a magnifying glass of focal length 4 centimeter if the image is to be viewed by a relaxed eye with a near point of 25 centimeter?
the illumination of an object by a light source is directly proportional to the strength of the source and inversely
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106. One pulse is delivered every time the fully charged capacitor loses 60.5% of its ..
A 9800 kg boxcar traveling at 19 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 13 m/s
The motion detector used in a physics lab sends and receives 49.55 kHz ultrasonic pulses. find the wavelength of the waves emitted by the motion detector
The crankshaft in a race car goes from rest to 3360rpm in 2.0s . What is the crankshaft's angular acceleration
Starting from rest, you move with a constant acceleration of 2.2 m/s2 for 15.0 s and then move with an acceleration of -2.2 m/s 2 for another 15.0s. What is your maximum speed attained? How far do you go through the whole trip?
A bicyclist rides 3.19 km due east, while the resistive force from the air has a magnitude of 8.83 N and points due west. Find the work done by the resistive force during the round trip
Light with some unknown wavelength is incident on a piece of copper. The most energetic electrons emitted from the copper have 2.7eV of kinetic energy. If the copper is replaced by apiece s0odium, what will be the maximum possible kinetic energy K of..
Spider man steps form the top of a large building. He falls freely from rest to the ground a distance of h. Find what is the height of the building
After some time elapses, the alligator's body temperature reaches a constant level. The rate of absorption is still 230 W. If the alligator loses heat with conduction and convection at a rate of 90 W, at what rate does it emit radiation?
A spherical weather balloon is filled with hydrogen until its radius is 3.40 m, Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3.
Two loudspeakers are placed 3-m apart. They emit 498 Hz sounds, in phase. A microphone is placed 3.2m distant from a point midway between the two speakers, where an intensity highest is recorded.
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