i always pick the best answers. thank you so much
1)What would occur as a result of the frictional drag of the atmosphere on an artificial satellite orbiting the Earth?
a. The satellite would increase in speed and escape the gravitational field of the Earth.
b. The satellite would increase in speed and spiral toward the Earth.
c. The satellite would decrease in speed and escape the gravitational field of the Earth.
d. The satellite would decrease in speed and spiral toward the Earth.
2)When electricity flows back and forth, we call it
a. alternating current
b. direct current
c. a series circuit
d. a parallel circuit
3)A jack is a device that is used to lift a car so that a tire can be changed. If a person uses a force of 100 N to lift an 8000 N car, what is the mechanical advantage of the jack?
a. 0
b. 100%
c. 80
d. 1/80
4)As the mass of a body increases, its gravitational force of attraction on the Earth
decreases
increases
remains the same
2007-03-23 13:41:18 · 6 answers · asked by couturevogue 3 in Science & Mathematics ➔ Physics
what's the answer to #3?? people put different answers..
thank you so much ;]
2007-03-23 13:53:05 · update #1
1. D
2. A
3. C
4. increases
*I have a concern on #1, only because the satellite is high enough away from the Earth that there is no atmosphere to cause any drag.
2007-03-23 13:50:53 · answer #1 · answered by Ghidorah 3 · 1⤊ 0⤋
1. D, because drag will occur causing the sattellite to slow down. The loss of speed will cause it to plummet to earth.
2. A, Its called AC (Alternating Current).
3. D, 1/80 (for every 10N there is 800N lift) therefore, 8000 divided by 100 = 80 or a 1 to 80 ratio.
4. Increase, because larger objects have greater magnetic pull.
Cheers ♥
2007-03-23 14:13:28 · answer #2 · answered by krodgibami 5 · 1⤊ 0⤋
1) d
2) a
3) d
4) remains the same
*** for #3, it's effort divided by resistance
so its 100/8000 = 1/80
2007-03-23 13:46:46 · answer #3 · answered by arthur!!! 4 · 0⤊ 2⤋
My brother that isn't in basic terms your concern yet many exciliant student r dealing with this concern and that i'm additionally....... I additionally masterbute and waste my time in cellular and information superhighway.... U would desire to study a religeous e book of a marvelous author and aboid tecnnology and **** rely. constantly stay with family participants. Made ur concepts to learn attempt to awaken 4 o clock interior the morn and learn. U will certainly experience nicely. ok i think of you will possibly save on with my suggestion......
2016-10-01 09:44:25 · answer #4 · answered by ? 4 · 0⤊ 0⤋
1) D
2) A
3) D
4) Increases
2007-03-23 13:47:22 · answer #5 · answered by chase 3 · 0⤊ 1⤋
Stop cheating on your homework.
2007-03-23 13:47:50 · answer #6 · answered by Chick 4 · 0⤊ 1⤋