Some species of whales can dive to depths of one kilometer. What is the total pressure they experience at this depth? (?sea = 1 020 kg/m3 and 1.01 × 10^5 N/m2 = 1 ATM.)
a. 9.00 ATM
b. 90.0 ATM
c. 100 ATM
d. 111 ATM
e. 130 ATM
c
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a. True b. False Indicate whether the statement is true or false
Suppose you wanted to hold up an electron against the gravitational force by the attraction of a fixed proton some distance above it
How far above the electron would the proton have to be? (k = 1/4??0 = 9.0 × 109 N ? m2/C2, e = 1.6 × 10-19 C, mproton = 1.67 × 10-27 kg, melectron = 9.11 × 10-31 kg) A) 1.5 m B) 2.3 m C) 3.7 m D) 4.6 m E) 5.1 m
A horizontal force of 200 N is applied to a 55.0-kg cart across a 15.0-m level surface. If the cart accelerates at 2.0 m/s2, then what is the work done by the force of friction as it acts to retard the motion of the cart?
a. –4.7E+3 J b. –1.4E+3 J c. –3.0E+3 J d. –9.0E+1 J e. –3.1E+2 J
The Sun and the Moon have the same angular size. If the Sun is 400 times farther away from the Moon, the Sun must be ________ times the size of the Moon.
A. 400 B. 1/400 C. 4 D. 1/4 E. 4?