Question

version - 01 - unit 2: quest 3: sp
this print - out should have 6 questi
multiple - choice questions may conti
the next column or page - find
before answering.
001 10.0 poin
hewitt cp9 03 p01 97
the oceans level is currently rising
1 mm per year.
at this rate, in how many years will sea
level be 5 m higher than now?
answer in units of y. answer in units of y.
002 10.0 points
holt sf 02a 01 97808
heather and matthew walk eastward with a
speed of 0.96 m/s east.
if it takes them 39 min to walk to the store,
how far have they walked?
answer in units of km. answer in units of
km.
003 10.0 points
light from the sun 97813
light from the sun reaches earth in 8.3 min.
how far is the earth from the sun? the
velocity of light is 3×10⁸ m/s.
answer in units of m. answer in units of
m.
004 10.0 points
holt sf 02rev 11 232981
the olympic record for the marathon is 2 h,
9 min, 21 s.
if the average speed of a runner achieving
this record is 5.436 m/s, what is the marathon
distance?
answer in units of km. answer in units of
km.
005 10.0 points
constant velocity 01 79665
at 1:00 p.m. a car, traveling at a constant
velocity of 98 km/h toward the west, is 16 km
to the west of our school.
how far from the school will it be at 3:30
p.m.?
answer in units of km. answer in units of
km.

Explanation:

Step1: Convert time to seconds

The time \(t = 8.3\) min. Since \(1\) min \(= 60\) s, then \(t=8.3\times60\) s \( = 498\) s.

Step2: Use the formula \(d = vt\)

The velocity of light \(v = 3\times10^{8}\) m/s. Using the formula \(d=vt\), we substitute \(v = 3\times10^{8}\) m/s and \(t = 498\) s. So \(d=(3\times 10^{8})\times498\) m.

$$d = 3\times498\times10^{8}\text{ m}=1494\times10^{8}\text{ m}=1.494\times 10^{11}\text{ m}$$

Answer:

\(1.494\times 10^{11}\text{ m}\)