Convert the following to SI units:
a) 8.0 in
b) 66 ft/s
c) 60 mph
d) 14 in2
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PROBLEM:
SOLUTION:
We assume that the earth revolves around the sun in a circular manner. Therefore, the distance between the earth and the sun will be the radius of its orbit.
The total distance traveled the earth in full revolution is
The total time of travel is
Therefore, the average speed is
Therefore, the average speed of the earth is 19.91 km/s.
Convert 19.91 km/s to m/s.
Therefore, the velocity is 19 910 m/s.
PROBLEM:
SOLUTION:
We know that the formula for the distance traveled, d, if we are given rate, r, and time, t is given by .
The rate in cm/s is
The distance traveled is
We need to convert 4.0 cm/year to km/My.
Therefore, the speed of the tectonic plates is 40 km/My.
PROBLEM:
SOLUTION:
We know that 1 km=1000 m and 1 hr=3600 sec.
Convert 342 m/s.
Therefore, the speed of sound in km/hr is 1231.2 km/hr.
PROBLEM:
SOLUTION:
Convert 29028 ft to km
Therefore, the height of Mount Everest is 8.847 kilometers.
PROBLEM:
SOLUTION:
First, convert 6 ft to inches
Add the 1.0 inch
So, the total height of the person is 73 inches. We convert this to meters to come up with the desired unit.
So, the height of the person is 1.85 meters.
PROBLEM:
SOLUTION:
The length in feet and inches are
The width in feet and inches are
PROBLEM:
SOLUTION:
PROBLEM:
SOLUTION:
We know that 1 hr = 3600 s, and 1 km = 1000 m.
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