____________________ discovered Uranus using a telescope that he built himself
Fill in the blank(s) with correct word
William Herschel
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Two pure tones are sounded together and a particular beat frequency is heard. What happens to the beat frequency if the frequency of one of the tones is increased?
A) It increases. B) It decreases. C) It does not change. D) It becomes zero. E) It could either increase or decrease.
Two ceramic cylinders have the following properties. Cylinder A has radius R and height 2H, while Cylinder B has radius 3R and height H/4. Their resistances are measured, and it is found that 
What is the ratio of the resistivities 
of the ceramics from which they are made?
A. 1/36 B. 9/8 C. 16/9 D. 1/18 E. 36 F. 9/4
Diffraction Gratings: A metallic sheet has a large number of parallel slits, 5.0 mm wide and 20 cm apart. This sheet is used as a diffraction grating for microwaves. A wide parallel beam of microwaves is incident normally on the sheet. If the microwave wavelength is 6.0 cm, what is the largest angle from the normal, at which an intensity maximum occurs?
A. 64° B. 69° C. 74° D. 79° E. 84°
Beam ACB has a sliding support at A and is supported at C by a pinned-end steel column with square cross section (E 5 200 GPa, b 5 40 mm) and height L 5 3.75 m. The column must resist a load Q at B with a factor of safety of 2.0 with respect to the critical load. The maximum permissible value of Q is approximately:
(A) 10.5 kN
(B) 11.8 kN
(C) 13.2 kN
(D) 15.0 kN
