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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If you see the stars and constellations rotating around a point in the night sky in the clockwise direction, you are looking north
a. True b. False Indicate whether the statement is true or false
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?
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