What are silicates?
Silicates are rock-forming minerals composed of one or more of the metals plus
silicon and oxygen.
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An airplane flies in a horizontal circle of radius 500 m at a speed of 150 m/s. If the plane were to fly in the same 500 m circle at a speed of 300 m/s, by what factor would its centripetal acceleration change?
a. 0.25 b. 0.50 c. 1.00 d. 2.00 e. 4.00
A typical neutron star is more massive than our Sun and about the size (radius) of ________
A) Earth B) the Moon C) a small asteroid (10 km in diameter) D) Jupiter
A simple harmonic oscillator oscillates with frequency f when its amplitude is A. If the amplitude is now doubled to 2A, what is the new frequency?
A) 4f B) f/2 C) f/4 D) 2f E) f
Power: Suppose you left five 100-W light bulbs burning in the basement for two weeks. If electricity costs 10.0ยข/kW?h, (a) how much did the electricity cost (to the nearest dollar) to leave those bulbs on, and (b) how many joules of electrical energy did they consume?
What will be an ideal response?