A 50-g cube of ice, initially at 0.0°C, is dropped into 200 g of water in an 80-g aluminum container, both initially at 40°C. What is the final equilibrium temperature? (Specific heat for aluminum is 900 J/kg•°C, the specific heat of water is 4186 J/kg•°C, and Lf = 3.33 × 10^5 J/kg.)
a. 17.6°C
c. 12.1°C
b. 9.5°C
d. 20.6°C
A
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The _________ stars are giant stars fusing helium in their cores and then in their shells
a. turnoff-point b. main-sequence c. turnon-point d. hydrogen-flash e. horizontal-branch
The speed of light is given by the value of
A.
B.
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.E.
.An 825-kg space vehicle is circling Earth in a circular orbit with a radius of 10,300 km. Its orbit is to be changed to a larger circle with a radius of 17,400 km. How much energy is required to accomplish this?
The mass of Earth is 5.97 × 1024 kg and G = 6.67 × 10-11 N ? m2/kg2. A) 1.00 × 109 J B) 1.30 × 1010 J C) 6.51 × 109 J D) 4.45 × 109 J E) 4.50 × 1010 J
A glass plate that is 2.5 cm long is separated from another glass plate at one end by a strand of someone's hair that is 0.010 mm in diameter. How far apart are the adjacent interference bands when viewed with light of wavelength 600 nm?
What will be an ideal response?