A cannon recoils from firing a cannonball. The speed of the cannon's recoil is small because the
A) force against the cannon is smaller than against the ball.
B) momentum is mainly concentrated in the ball.
C) cannon has more mass than the ball.
D) momentum of the cannon is smaller.
C
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An extinct group of arthropods with a body divided into three lobes is a(n) ____
a. crinoid b. acritarch c. organelle d. trilobite e. echinoid (echinoderm
What is the dew-point temperature of the parcel?
Take a parcel of air from the Bay of Bengal in the Indian Ocean up to Cherrapunji at 1500 m (4900 ft). Assume that its temperature is 30°C and has 90% RH at 0 m (0 ft) over the Bay of Bengal.
What will be an ideal response?
Which reaction occurs during photosynthesis?
a. Carbon dioxide is produced. b. Oxygen is produced. c. Sulfate is produced. d. Sulfide is produced. e. Methane is produced
Monoculture farming ________
A) accounts for less than 1% of U.S. croplands B) is always accompanied by no-till agriculture C) requires no chemical fertilizers or pesticides D) is a development of industrial agriculture E) is typical of Native American farming techniques