You are currently emitting electromagnetic waves
Indicate whether the statement is true or false
TRUE
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A bullet of mass 0.010 kg and speed of 500 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. The work done on the bullet by the block is
A. 1250 J. B. 2.5 J. C. zero. D. -1250 J. E. -2.5 J.
Two solenoids of equal length are each made of 2000 turns of copper wire per meter. Solenoid I has a 5.00-cm radius; solenoid II a 10.0-cm radius. When equal currents are present in the two solenoids, the ratio of the magnitude of the magnetic field BI along the axis of solenoid I to the magnitude of the magnetic field BII along the axis of solenoid II, BI/BII, is
a. 1/4. b. 1/2. c. 1. d. 2. e. 4.
Two slits are illuminated with red light (? = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central maximum?
a. 0.94 b. 0.92 c. 0.96 d. 0.98 e. 0.99
The hydrogen Balmer line H? has a wavelength of 486.1 nm in the laboratory. It is observed in a quasar at 2430.5 nm. What is the change in wavelength (in nm) of this quasar? Is it a "redshift" or "blueshift"?
a. 0; no change b. 2430.5; redshift c. 486.1; blue shift d. 1944.4; blueshift e. 1944.4; redshift