A single slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum, using monochromatic light of 490-nm wavelength. What is the width of the slit?
A) 762 nm B) 700 nm C) 637 nm D) 668 nm E) 731 nm
A
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How large is an impact crater compared to the size of the impactor?
A) the same size B) 10-20 percent larger C) 10 times larger D) 100 times larger E) 1,000 times larger
In the figure shown, the coefficient of kinetic friction between the block and the incline is 0.40. What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley
a.
3.4 m/s2
b.
3.7 m/s2
c.
4.2 m/s2
d.
3.9 m/s2
e.
5.4 m/s2
Two blocks hang from strings would around different parts of a 2 kg double pulley as shown. The pivot exerts a normal force FN supporting the double pulley. Assuming the system is not in equilibrium, which statement about FN is true after the system is released from rest? (Use g = 10 N/kg.)
An electron and a positron, which are two massive particles, can annihilate when they come together to produce two photons, which have no mass. According to special relativity, this pair annihilation is an example of __________
Fill in the blank(s) with correct word