#### Convert the following to SI units:

#### a) 6.15 ms

#### b) 27.2 km

#### c) 112 km/h

#### d) 72 µm/ms

Continue reading “Physics for Scientists and Engineers 3E by R. Knight, P1.23”

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# Tag: Convert

#### Convert the following to SI units:

#### a) 6.15 ms

#### b) 27.2 km

#### c) 112 km/h

#### d) 72 µm/ms

Continue reading “Physics for Scientists and Engineers 3E by R. Knight, P1.23”

#### Suppose that your bathroom scale reads your mass as 65 kg with a 3% uncertainty. What is the uncertainty in your mass (in kilograms)?

**Solution:**

#### a) The average distance between the Earth and the Sun is 10^{8} km. Calculate the average speed of the Earth in its orbit in kilometers per second.

#### b) What is this is meters per second?

Continue reading “College Physics Problem 1.10”

#### Tectonic plates are large segments of the Earth’s crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year.

(a) What distance does it move in 1.0 s at this speed?

(b) What is its speed in kilometers per million years?

**Solution:**

**Part a**

**Part b**

#### The speed of sound is measured to be 342 m/s on a certain day. What is this in km/h?

**Solution:**

#### Mount Everest, at 29,028 feet, is the tallest mountain on the Earth. What is its height in kilometers? (Assume that 1 kilometer equals 3,281 feet.)

**Solution:**

#### What is the height in meters of a person who is 6 ft 1.0 in. tall? (Assume that 1 meter equals 39.37 in.)

**Solution:**

#### Soccer fields vary in size. A large soccer field is 115 m long and 85 m wide. What are its dimensions in feet and inches?

Continue reading “College Physics Problem 1.2.5”

#### American football is played on a 100-yd-long field, excluding the end zones. How long is the field in meters? (Assume that 1 meter equals 3.281 feet.)

Continue reading “College Physics Problem 1.2.4”

#### Show that 1.0 m/s=3.6 km/h.

#### Hint: Show the explicit steps involved in converting 1.0m/s=3.6km/h.

Continue reading “College Physics Problem 1.2.3”

Continue reading “Physics for Scientists and Engineers 3E by R. Knight, P1.23”

The uncertainty is computed as

☚

Therefore, the uncertainty in the given mass is 1.95 kg.

Continue reading “College Physics Problem 1.10”

(a) What distance does it move in 1.0 s at this speed?

(b) What is its speed in kilometers per million years?

We know that the formula for the distance traveled, d, if we are given rate, r, and time, t is given by

Therefore, the distance traveled is

Therefore, the distance traveled by the tectonic plate is about ☚

We need to convert 4.0 cm/year to km/My.

Therefore, the speed of the tectonic plates is 40 km/My. ☚

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.

Convert 29028 ft to km

☚

Therefore, the height of Mount Everest is 8.847 kilometers.

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. ☚

Continue reading “College Physics Problem 1.2.5”

Continue reading “College Physics Problem 1.2.4”

Continue reading “College Physics Problem 1.2.3”

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