Doubling the mean distance from the Sun results in changing the orbital period of revolution by what factor?
a. 21/2
b. 2
c. 23/2
d. 22
c
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Four of the five answers below are correct statements about electrons. Select the exception
a. Electrons closest to the nucleus are at the lowest energy level. b. No more than two electrons can occupy a single orbital. c. Electrons cannot move out of their assigned orbital space. d. The innermost orbital holds two electrons. e. At the second energy level, there are four possible orbitals with a total of eight electrons.
A wheel is spinning on an axle. The linear velocity of a point on the rim is simply the product of the radius times the rotational velocity, as long as the rotational velocity is measured in units of
A. deg/min. B. rad/s. C. deg/s. D. rev/s. E. rev/min.
A wire carrying a current that placed in a magnetic field will experience a maximum force if the angle between the direction of the current and the direction of the magnetic field is 60°
Indicate whether the statement is true or false
The Doppler shift of ultrasonic waves can measure the speed of blood in an artery. If the frequency of the stationary source is 95.0 kHz and the reflected sound has a Doppler shift of 210 Hz, what is the blood flow speed? (The speed of sound inside the body is 1 500 m/s.)
a. 1.0 m/s b. 1.7 m/s c. 3.3 m/s d. 3.9 m/s e. 6.5 m/s