Addition by 1. Components: Displacement vector  is 75 cm long and points at 30° above the +x-axis. Displacement vector  is 25 cm long and points along the -x-axis. Displacement vector  is 40 cm long and points at 45° below the -x-axis.(a) Determine the x and y components of vector .(b) Determine the x and y components of vector 

src="https://sciemce.com/media/4/ppg__cp1pbb0313192044__f15g1q11g5.jpg" style="vertical-align: -5.0px;" />.(c) Determine the x and y components of vector .(d) Determine the x and y components of the resultant of these three vectors.(e) Determine the magnitude and direction of the resultant of these three vectors.



What will be an ideal response?

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(a) Ax = 65 cm, Ay = 38 cm (b) Bx = -25 cm, By = 0 cm
(c) Cx = -28 cm, Cy = -28 cm (d) Rx = 12 cm, Ry = 9 cm
(e) 15 cm at 38° above the +x-axis

Physics & Space Science

When did the quaternary period occur?

What will be an ideal response?

A baseball catcher puts on an exhibition by catching a 0.200-kg ball dropped from a helicopter at a height of 150 m above the catcher. If the catcher "gives" with the ball for a distance of 0.755 m while catching it, what average force is exerted on the mitt by the ball? (g = 9.80 m/s2)

a. 39.7 N b. 294 N c. 389 N d. 399 N e. 1110 N

Is there a force on the moon, and how do you know?

A) No, because the moon moves at an unchanging speed. B) No, because the moon is not accelerated. C) Yes, because there must be a force to keep the moon moving. D) Yes, because the moon is accelerated. E) Yes, because there must be a force pulling outward on the moon, away from Earth, to keep the moon from falling down to Earth.

Geologists have principally used which class of rocks to establish the relative time scale?

a. Igneous b. Foliated c. Metamorphic d. Sedimentary