Earth displays slower erosion than any other Terrestrial planet
a. True
b. False
Indicate whether the statement is true or false
False
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Billy swims to a point straight across a 100. m wide river that flows at 1.2 m/s. How long does it take him to swim to the other side?
What will be an ideal response?
Waves propagate at 7.40 m/s along a stretched string. The end of the string is vibrated up and down once every 2.25 s. What is the wavelength of the waves that travel along the string?
a. 4.50 m b. 16.7 m c. 3.29 m d. 37.5 m e. 8.09 m
A particle (q = +5.0 ?C) is released from rest when it is 2.0 m from a charged particle which is held at rest. After the positively charged particle has moved 1.0 m toward the fixed particle, it has a kinetic energy of 50 mJ. What is the charge on the fixed particle?
A. ?2.2 ?C B. +6.7 ?C C. ?2.7 ?C D. +8.0 ?C E. ?1.1 ?C
When we say work is done by a force, we mean the force does
a. all the work. b. positive work. c. negative work. d. zero work.