Addition by 1. Components: Two forces are acting on an object as shown in the figure. Assume that all the quantities shown are accurate to three significant figures.
(a) What is the magnitude of the resultant force on the object?(b) What is the direction of the resultant force?
What will be an ideal response?
(a) 185 N (b) 77.8° above the +x-axis
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A large telescope of mass 8410 kg is in a circular orbit around the earth, making one revolution every 927 minutes. What is the magnitude of the gravitational force exerted on the satellite by the earth?
(G = 6.67 × 10-11 N ? m2/kg2, Mearth = 6.0 × 1024 kg)
In the apparatus shown in figure Q4.1b, the final value displayed by the voltmeter is proportional to 
A. The rate at which electrons emerge from the cathode. B. The average kinetic energy of the ejected electrons. C. The maximum kinetic energy of the ejected electrons. D. Both A and C.
Sirius has a parallax of 0.38", while Alpha Centauri's is 0.77." Alpha Centauri is about ________ as Sirius
Fill in the blank(s) with correct word
Near the earth the intensity of radiation from the Sun is 1350 W/m2. What volume of space in this region contains 1.0 J of energy?
A) 4.5 × 10-6 m3 B) 3.3 × 102 m3 C) 7.4 × 10-4 m3 D) 1.4 × 103 m3 E) 2.2 × 105 m3