\u20221 SSM Earth is approximately a sphere of radius 6.37 \u00d7 106 m.<\/p>\n
What are (a) its circumference in kilometers, (b) its surface area<\/p>\n
in square kilometers, and (c) its volume in cubic kilometers?<\/p>\n
2-The micrometer (1 \u03bcm) is often called the micron. (a) How<\/p>\n
many microns make up 1.0 km? (b) What fraction of a centimeter<\/p>\n
equals 1.0 \u03bcm? (c) How many microns are in 1.0 yd?<\/p>\n
3. The fastest growing plant on record is a Hesperoyucca whipplei<\/p>\n
that grew 3.7 m in 14 days. What was its growth rate in micrometers<\/p>\n
per second?<\/p>\n
4. Earth has a mass of 5.98 \u00d7 1024 kg. The average mass of the atoms<\/p>\n
that make up Earth is 40 u. How many atoms are there in Earth?<\/p>\n
5. Iron has a density of 7.87 g\/cm3, and the mass of an iron atom<\/p>\n
is 9.27 \u00d7 10\u221226 kg. If the atoms are spherical and tightly packed,<\/p>\n
(a) what is the volume of an iron atom and (b) what is the distance<\/p>\n
between the centers of adjacent atoms?<\/p>\n
Part 2:<\/p>\n
1. While driving a car at 90 km\/h, how far do you move while<\/p>\n
your eyes shut for 0.50 s during a hard sneeze?<\/p>\n
2. An automobile travels on a straight road for<\/p>\n
40 km at 30 km\/h. It then continues in the same direction for<\/p>\n
another 40 km at 60 km\/h. (a) What is the average velocity of the<\/p>\n
car during the full 80 km trip? (Assume that it moves in the positive<\/p>\n
x direction.) (b) What is the average speed? (c) Graph x versus<\/p>\n
t and indicate how the average velocity is found on the graph.<\/p>\n
3. The position of an object moving along an x axis is given<\/p>\n
by x = 3t \u2212 4t2 + t3, where x is in meters and t in seconds. Find the<\/p>\n
position of the object at the following values of t: (a) 1 s, (b) 2 s,<\/p>\n
(c) 3 s, and (d) 4 s. (e) What is the object\u2019s displacement<\/p>\n
between t = 0<\/p>\n
and t = 4 s? (f) What is its average velocity for the time interval<\/p>\n
from t = 2 s to t = 4 s? (g) Graph x versus t for 0 \u2264 t \u2264 4 s and indicate<\/p>\n
how the answer<\/p>\n
for (f) can be found on the graph.<\/p>\n
4. You are to drive 300 km to an interview. The interview<\/p>\n
is at 11:15 a.m. You plan to drive at 100 km\/h, so you leave<\/p>\n
at 8:00 a.m. to allow some extra time. You drive at that speed for<\/p>\n
the first 100 km, but then construction work forces you to slow to<\/p>\n
40 km\/h for 40 km. What would be the least speed needed for the<\/p>\n
rest of the trip to arrive in time for the interview?<\/p>\n
5. At a certain time a particle had a speed of 18 m\/s in<\/p>\n
the positive x direction, and 2.4 s later its speed was 30 m\/s in the<\/p>\n
opposite direction. What is the average acceleration of the particle<\/p>\n
during this 2.4 s interval?<\/p>\n
6. SSM An electron with an<\/p>\n
initial velocity v0 = 1.50 \u00d7 105 m\/s<\/p>\n
enters<\/p>\n
a region of length<\/p>\n
L = 1.00 cm where it is electrically<\/p>\n
accelerated (Fig. 2-26). It emerges<\/p>\n
with v = 5.70 \u00d7 106 m\/s. What is its<\/p>\n
acceleration, assumed constant?<\/p>\n
7. An electric vehicle starts from rest and accelerates at a rate<\/p>\n
of 2.0 m\/s2 in a straight line until it reaches a speed of 20 m\/s. The<\/p>\n
vehicle then slows at a constant rate of 1.0 m\/s2 until it stops. (a)<\/p>\n
How much time elapses from start to stop? (b) How far does the<\/p>\n
vehicle travel from start to stop?<\/p>\n
8. A car traveling 56.0 km\/h is 24.0 m from a barrier<\/p>\n
when the driver slams on the brakes. The car hits the barrier 2.00 s<\/p>\n
later. (a) What is the magnitude of the car\u2019s constant acceleration<\/p>\n
before impact? (b) How fast is the car traveling at impact?<\/p>\n
9. Figure 2-29 depicts the motion<\/p>\n
of a particle moving along an x axis with<\/p>\n
a constant acceleration. The figure\u2019s<\/p>\n
vertical scaling is set by xs = 6.0 m. What<\/p>\n
are the (a) magnitude and (b) direction<\/p>\n
of the particle\u2019s acceleration?<\/p>\n
10. With what speed must a ball be thrown vertically<\/p>\n
from ground level to rise to a maximum height of 50 m?<\/p>\n
(b) How long will it be in the air? (c) Sketch graphs of y, v, and a<\/p>\n
versus t for the ball. On the first two graphs, indicate the time at<\/p>\n
which 50 m is reached.<\/p>\n
11. At a construction site a pipe wrench struck the ground<\/p>\n
with a speed of 24 m\/s. (a) From what height was it inadvertently<\/p>\n
dropped? (b) How long was it falling? (c) Sketch graphs of y, v, and<\/p>\n
a versus t for the wrench.<\/p>\n
12. As a runaway scientific balloon<\/p>\n
ascends at 19.6 m\/s, one of its<\/p>\n
instrument packages breaks free of<\/p>\n
a harness and free-falls. Figure 2-34<\/p>\n
gives the vertical velocity of the<\/p>\n
package versus time, from before it<\/p>\n
breaks free to when it reaches the<\/p>\n
ground. (a) What maximum height<\/p>\n
above the break-free point does it<\/p>\n
rise? (b) How high is the break-free<\/p>\n
point above the ground?<\/p>\n","protected":false},"excerpt":{"rendered":"
\u20221 SSM Earth is approximately a sphere of radius 6.37 \u00d7 106 m. What are (a) its circumference in kilometers, (b) its surface area in square kilometers, and (c) its volume in cubic kilometers? 2-The micrometer (1 \u03bcm) is often called the micron. (a) How many microns make up 1.0 km? (b) What fraction of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[10],"class_list":["post-78501","post","type-post","status-publish","format-standard","hentry","category-research-paper-writing","tag-writing"],"_links":{"self":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/78501","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/comments?post=78501"}],"version-history":[{"count":0,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/posts\/78501\/revisions"}],"wp:attachment":[{"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/media?parent=78501"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/categories?post=78501"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/papersspot.com\/blog\/wp-json\/wp\/v2\/tags?post=78501"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}