The set of star types, called the spectral sequence, is important because it is a _____
A) wavelength sequence
B) visibility sequence
C) positioning sequence
D) temperature sequence
D
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Velocity Selector: A beam of electrons is accelerated through a potential difference of 1.0 kV before entering a velocity selector. If the magnetic field of the velocity selector has a magnitude of 0.010 T, what magnitude of the electric field is required if the electrons are not to be deflected as they pass through the velocity selector? (e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg)
A. 5.9 × 103 V/m B. 1.9 × 105 V/m C. 6.0 × 105 V/m D. 7.2 × 106 V/m E. 1.1 × 105 V/m
If you lift a 35-N weight vertically 50 m above the ground, you are
a. doing work against gravity. b. doing work against friction. c. doing work against inertia. d. doing none of these.
A 92-kg man climbs onto a car with worn out shock absorbers and this causes the car to drop down 4.5 cm. As he drives along, he hits a bump, and this starts the car oscillating at an angular frequency of 4.52 rad/s. What is the mass of the car?
A) 890 kg B) 760 kg C) 920 kg D) 990 kg E) 1900 kg
Speed is a(n) ______________ quantity
Fill in the blank(s) with correct word