When red light illuminates a grating with 7000. lines per centimeter, its second maximum is at 62.4°. What is the wavelength of the light?
What will be an ideal response?
633. nm
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Evidence from the analysis of zircon crystals suggests that the Earth
A) may have been habitable immediately after its formation B) could only have been habitable after significant amounts of oxygen had built up in its atmosphere C) could only have been habitable after the end of the Hadean Eon 500 million years ago D) may have been habitable in as little as 100 million years after its formation
Force on a Wire: A vertical wire carries a current straight up in a region where the magnetic field vector points toward the north. What is the direction of the magnetic force on this wire?
A. downward B. toward the north C. toward the east D. toward the west E. upward F. toward the south
A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is 10 m/s2
a. True b. False Indicate whether the statement is true or false
A proton is moving at 
m/s and experiences a magnetic force of magnitude 
If the magnetic field makes an angle of 40
with respect to the velocity of the proton, what is the field's magnitude?
A. 
B. 
C. 
D. 
E. 