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3 years ago

L. What does it mean to "convert" from one unit to another? Give an example.

Physics

2 answers:

TiliK225 [7]3 years ago

5 0

These are four questions and four answers

Question 1. What does it mean to "convert" from one unit to another? Give an example.

Convert from one unit to another is transforming or changing the magnitude to an equivalent measure according to a different pattern of comparison or unit of measure.

For example, converting from meter to centimeters, means to transform the unit of measure (the pattern of comparison) from meter to centimeter.

When your measure is 3 meters, means the length is 3 times the standard pattern named meter.

Therefore, converting it to centimeters means that you want to know how many times is 3 meters relative to the a new pattern named centimeter.

Since, 1 meter equals 100 cm, you build a conversion factor which you can use to make the conversion:

1 m = 100 cm ⇒ 1 = 100 cm / 1 m

∴ 3 m = 3 m × 100 cm / 1 m = 300 cm.

Question 2. What are the general mathematical operations you use when converting from one SI unit to another?

The most common mathematical operations are the basic ones: addition, substraction, multiplication and division.

See one example of each one:

a) Addition:

Transform 20°C to K: 20 + 273.15 K = 293.15 K

b) Subtraction:

Convert 300 K to celsius degrees: 300 - 273.15°C = 26.85°C

c) Multiplication

Convert 1000 Km to meter

1000 Km × 1000 m/Km = 1,000,000 m

d) Division

Convert 1540 mm Hg to atm

1 atm = 760 mmHg ⇒ 1 = 760 mmHg / atm

1540 mmHg / (760 mmHg / atm) = 2.026 atm

Question 3. How many meters do you cover in a 10 km (10-K) race?

This requires to convert 10 km to the equivalent number of meters.

Conversion factor: 1 km = 1000 m ⇒ 1 = 1000 m/Km

∴ 10 Km = 10 Km × 1000 m/km = 10,000 m ← answer.

Quesiton 4. An Olympic swimming pool is 50 meters long. You swim from one end to the other four times.

a. How many meters do you swim?

4 laps × 50 m/lap = 200 m ← answer

b. How many kilometers do you swim?

1 = 1 km / 1000m

200 m = 200 × 1 km / 1000 m = 0.200 km ← answer

c. How many centimeters do you swim?

1 m = 100 cm ⇒ 1 = 100 cm / m

200 m = 200 m × 100 cm/m = 20,000 cm ← answer

ladessa [460]3 years ago

5 0

L. What does it mean to "convert" from one unit to another? Give an example.
To convert means is to obtain an equivalent value with a specific unit to another unit. An example would be <span>1 inch is equal to 2.54 cm.</span>

2. What are the general mathematical operations you use when converting from one SI unit to another?
The mathematical operations used in converting units would be multiplication and division.

3. How many meters do you cover in a 10 km (10-K) race?

4. An Olympic swimming pool is 50 meters long. You swim from one end to the other four times.
a. How many meters do you swim?
50 x 4 = 200 meters
b. How many kilometers do you swim?
200 meters = 0.20 kilometers
c. How many centimeters do you swim?
200 meters = 20000 centimeters

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Easy defimation of newtons second law of motion

shtirl [24]

Hi pupil here's your answer ::

_______________________________

Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.
ie., F=ma

Where F is the force applied, m is the mass of the body, and a, the acceleration produced.

Or in simplest language it is the force applied to a particular object of particular mass multiplied by the acceleration caused by force .

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3 years ago

What is (a) the wavenumber and (b) the wavelength of the radiation used by an fm radio transmitter broadcasting at 92. 0 mhz?

yulyashka [42]

The wavenumber and (b) the wavelength of the radiation used by an fm radio transmitter broadcasting at 92. 0 mhz will be 31.25 * $10^{2}$ $m^{-1}$ and 0.032 * $10^{2}$ m respectively

Forms of electromagnetic radiation like radio waves, light waves or infrared (heat) waves make characteristic patterns as they travel through space. Each wave has a certain shape and length. The distance between peaks (high points) is called wavelength.

Wavenumber, also called wave number, a unit of frequency, often used in atomic, molecular, and nuclear spectroscopy, equal to the true frequency divided by the speed of the wave and thus equal to the number of waves in a unit distance.

wavelength = ?

frequency = 92 m Hz = 92 * $10^{6}$ Hz

speed of light = 3 * $10^{8}$ m/s

speed of light = frequency * wavelength

wavelength = speed of light / frequency

= 3 * $10^{8}$ / 92 * $10^{6}$

= 0.032 * $10^{2}$ m

wavenumber = 1 / wavelength

= 1 / 0.032 * $10^{2}$ m

= 31.25 * $10^{2}$ $m^{-1}$

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1 year ago

A series of pulses, each of amplitude 0.1m , is sent down a string that is attached to a post at one end. The pulses are reflect

sp2606 [1]

The net displacement at a point on the string where the pulses cross is 0.2 m.

The term "displacement" refers to a shift in an object's position. It has a magnitude and a direction, making it a vector quantity. An arrow pointing from the starting point to the finishing point serves as its symbol.

A string that is connected to a post at one end is used to transmit a sequence of pulses, each measuring 0.1 meters in amplitude.

At the post, the pulses are reflected and return along the string without losing any of their amplitude.

Now, let's say the ends are free.

There is no inversion on reflection if the end is free. The amplitude at their intersection is 2A.

Now, since A = 0.1 m

Then, 2A = 2(0.1) = 0.2 m

As a result, the net displacement at the string's intersection of two pulses is 0.2 m.

The correct option is (c).

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