If you lie on a bed of nails your back will encounter pressure due to contact with the nails. Nail pressure on your back will be less if the bed has
A) fewer nails.
B) more nails.
C) both of the above
D) none of the above
Answer: B
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What is the diameter of the galaxy, in km?
A) about 1 billion trillion km (1021 km) B) about 10 trillion km (1013 km) C) about 1 million trillion km (1018 km) D) about 100,000 km (105 km)
Can we see the "intruder galaxy" in the image?
A: Yes. B: No.
If ? = 90° ? ?, what is the value of sin2 ? + sin2 ??
a. 0 b. 1 c. ?1 d. The answer depends on ?.
A 5.3 L flask of ideal neon gas (which is monatomic) is at a pressure of 6.0 atm and a temperature of 290k The atomic mass of neon is 20.2 g/mol
What is the mass of the neon gas in the flask. (R = 8.31 J/mol ? K, 1 atm = 101 kPa, NA = 6.022 × 1023 molecules/mol) A) 2.7 × 10-2 B) 1.6 × 10-2 C) 1.3 × 101 D) 2.7 × 101 E) 2.7 × 103