A 120-? laboratory resistor is rated at 0.25 W. What is the safe current through the resistor?
A) 30 A
B) 2.1 mA
C) 22 mA
D) 46 mA
D
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Mathematical models indicate that ____ galaxies are produced by high speed collisions in which a smaller galaxy passes through another galaxy almost perpendicular to the disk of the galaxy
a. ring b. spiral c. antenna d. irregular e. tidal tail
How do absolute visual magnitude and luminosity differ?
What will be an ideal response?
The latent heat of vaporization of sweat is 2 430 kJ/kg at body temperature. Assuming that sweating is the only mechanism for dissipating heat, what would be the maximum sustainable metabolic rate if 75% of the energy used by the body goes into waste heat? The body can produce up to 1.5 kg of sweat per hour
a. 4.9E+4 W b. 4.9E+6 W c. 2.2E+4 W d. 1.4E+3 W
A stretched string is observed to vibrate in three equal segments when driven by a 480 Hz oscillator. What is the fundamental frequency of vibration for this string?
a. 480 Hz b. 320 Hz c. 160 Hz d. 640 Hz e. 240 Hz