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Lenses Quiz
Physical Science Part 3 [Foundations] 20-21 (Acc. Ed) / Lenses and Electricity
3. True or false. Light is refracted at all points coming through a lens.
False
True

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?