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3 years ago

A wave has a speed of 50 m/s and a frequency of 100 Hz. Calculate its wavelength.

Physics

1 answer:

Allisa [31]3 years ago

8 0

Answer:

1/2m or 0.5m

Explanation:

The formula to find the speed of a wave is given by:

V = frequency x wavelength

To find the wavelength, make the wavelength the subject of the formula

Therefore, wavelength = velocity ÷ frequency

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_________statistics are measures that summarize the characteristics of a sample

Tamiku [17]

Answer:

Explanation:

Descriptive statistics statistics are measures that summarize the characteristics of a sample.

Hope it helps

4 0

3 years ago

A tree is standing in the middle of a meadow. As you watch, the wind begins

Klio2033 [76]

Answer:

B) The tree was stationary and began to move.

Explanation:

This situation can be explained by using Newton's first law of motion, which states that

"An object at rest (or in motion at constant velocity) stays at rest (or in motion at constant velocity) unless a net non-zero force is exerted on it"

This means that an object at rest can start moving if and only if there is a net non-zero force acting on it.

In the example in the problem, the tree is initially stationary. Later, it started to move. According to Newton's first law, therefore, there must be a net force that caused this change of state of motion of the tree. Therefore, the correct answer is

B) The tree was stationary and began to move.

8 0

3 years ago

A current of 200 mA through a conductor converts 40 joules of electrical energy into heat in 30 second

Komok [63]

Answer:

V = 6.65 [volt]

Explanation:

First, we must calculate the power by means of the following equation, where the voltage is related to the energy produced or consumed in a given time.

$P=E/t\\P = 40/30\\P = 1.33[s]$

Using the power we can calculate the voltage, by means of the following equation that relates the voltage to the current.

$P=V*I$

where:

V = voltage [Volts]

I = current = 200 [mA] = 0.2 [A]

$V = 1.33/0.2\\V = 6.65 [volt]$

8 0

3 years ago

The gravity on mars is 3.8 m/s2 and you weigh 200 N. your mass will be??

lisabon 2012 [21]

Answer:

Mass = 52.63 kilograms

Explanation:

Given the following data;

Acceleration due to gravity = 3.8 m/s²

Weight = 200 N

To find mass;

Mathematically, the weight of a physical object is given by the formula;

Weight = mass * acceleration due to gravity

Substituting into the formula, we have;

200 = mass * 3.8

Mass = 200/3.8

Mass = 52.63 kg

3 0

3 years ago

A cubic box of volume 5.1 x 10 -2m3 is

I am Lyosha [343]

Answer:

21544 N

Explanation:

Let the atmospheric pressure be 101325 Pa

The side length of the cubic box:

$V = d^3 = 0.051m^3$

$d = \sqrt[3]{V} = \sqrt[3]{0.051} = 0.371 m$

The area of the cubic box:

$A = d^2 = 0.371^2 = 0.1375 m^2$

20 C = 20 + 273 = 293 K

180 C = 180 + 273 = 453 K

As the volume of the air inside the closed cube is not changed, assume the ideal gas law we have

$\frac{P_1}{T_1} = \frac{P_2}{T_2}$

Where P1 = 101325 Pa and T1 = 293K are the original atmospheric pressure and temperature. P2 and T2 = 453 are the new pressure and temperature after the cube gets heat up

$P_2 = P_1\frac{T_2}{T_1} = 101325\frac{453}{293} = 156656 Pa$

The net force on each side of the box it its pressure times side area

$F = P_2A = 156656 * 0.1375 = 21544 N$

8 0

3 years ago