Which of the following best describes the property of the period of orbital revolution for an Earth satellite?
a. greater when the orbital radius is smaller
b. greater when the orbital radius is larger
c. independent of the orbital radius
d. determined mainly by the satellite's mass
b
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An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, and inductor, or a capacitor. At time t = 0 the voltage is zero
At time t = T/4 the current in the unknown element is equal to zero, and at time t = T/2 the current is I = -Imax, where Imax is the current amplitude. What is the unknown element? A) a resistor B) an inductor C) a capacitor D) an inductor or a capacitor
A plane stress element on a bar in uniaxial stress has a tensile stress of ?? 5 78 MPa (see figure). The maximum shear stress in the bar is approximately:
(A) 29 MPa
(B) 37 MPa
(C) 50 MPa
(D) 59 MPa
Conversion of Units: A 2.00-qt bottle of soda is on sale for $1.29. What should be the price of a 2.00-L bottle of the same soda to yield the same value? (1.00 qt = 0.947 L)
Fill in the blank(s) with the appropriate word(s).
A candle emits what kind of spectrum?
A. blueshifted B. emission-line C. absorption-line D. continuous E. redshifted