If F = 4.0 N and m = 2.0 kg, what is the magnitude a of the acceleration for the block shown below? The surface is frictionless
a.
5.3 m/s2
b.
4.4 m/s2
c.
3.5 m/s2
d.
6.2 m/s2
e.
8.4 m/s2
c
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Calorimetry: A lab assistant pours 330 g of water at 45°C into an 855-g aluminum container that is at an initial temperature of 10°C. The specific heat of aluminum is 900 J/kg ? K, and that of water is 4186 J/kg ? K. What is the final temperature of the system, assuming no heat is exchanged with the surroundings?
A. 28°C B. 32°C C. 31°C D. 33°C E. 35°C
Deuterium was made only in primordial nucleosynthesis, since stars destroy it
Indicate whether the statement is true or false
An extrasolar planet in the HD 4308 system orbits its parent star at a distance of 17.1 million kilometers and takes 15.56 Earth days to complete one orbit
Given this and assuming that planet has a very low mass compared to the parent star, what is the mass of the parent star? A) 3.25 1030 kg B) 2.00 1030 kg C) 1.25 1030 kg D) 1.64 1030 kg
Magnesium alloys have low ductility because of their _________close-packed crystal structure.
Fill in the blank(s) with the appropriate word(s).