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1.A beam of parallel incoming light rays reflect off a convex mirror convergently. That means that they meet after reflection (True or false)
2. Angle of incidence is equal to angle of reflection only in plane mirros. For curved mirrors of incidence and angle of reflection are not equal (true or false)
3.When light leaves air and enters water its speed stays constant (true or false)
4. In a standing wave, the antinodes oscillate with maximum amplitude (true or false)
5. In a standing wave the separation between two consecutive nodes is 20cm. What is the wavelength of the wave?
A lens is coated with material of indexof refraction 1.38. What thickness of coating should be used to give maximum transmission
Water flows though a 20mm diameter pipe at 3L/min and static pressure of 100mmHG. What is the wall stress of the pipe. The pipe is 1.5mm thick
A 4.80-kg watermelon is dropped from rest from the roof of a 22.0-m -tall building and feels no appreciable air resistance. Just before it strikes the ground, what is the watermelon's speed? A physics book slides off a horizontal table top with a spe..
An ultracentrifuge is sometimes used to separate chemicals and other materials by applying a huge ARTIFICIAL GRAVITY by means of extremely rapid rotation. Find the necessary rotational rate of this device
a 296 g bird flying along at 6.57 ms sees a 8.8 g insect heading straight toward it with a speed of 34.87 ms. the bird
A sled traveling at a speed of 5.0 m/s slows to a stop 4.0 m fromthe point where its passenger rolled off. What is the magnitude of the horizontal net force that slows the 110 N sled?
An inexperienced catcher catches a 130 km/h fastball of mass 140 g within 1 ms, What are the average forces imparted to the two gloved hands during the catches
You have a pure (24-karat) gold ring with mass 17.8 gram. Gold has an atomic mass of 197 g/mol and an atomic number of 79. Compute what is their total positive charge
With what velocity would they be separating after the collision.
Two plates are being discharged by a constant current. Each plate has a radius of 4.00 cm. What is the current in the wires attached to the plates
As a function of time, the velocity of the football can be written as . (If the acceleration of an object is constant, find the average acceleration vector of the football
Consider a simple model of the hydrogen atom where one electron is in a stable orbit around one proton at a distance of 0.05 nm. If the electron were moved to a larger stable orbit (say 0.1 nm), what would be the sign of: delta U = the change in pote..
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