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3 years ago

8

Waves that can travel only through a medium are called waves. Sound waves are waves. (Hint: same w

ord fills in both blanks)

1 answer:

Nana76 [90]3 years ago

6 0

First blank is radiator

Second blank is radiator

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An atom emits a light wave with a wavelength of 449 nm. what type or color of light does this represent?

Vinvika [58]

The visible spectrum ranges from 390 nm to 700 nm. the visible spectrum consist of the red ( 620 - 750 nm ) , orange ( 590 - 620 nm ) , yellow ( 570 - 590 nm ) , green ( 495 - 570 nm ) , blue ( 450 - 495 nm ) and violet ( 380 - 450 nm ) so the wave length 449 nm will produce a violet color

4 0

3 years ago

Power is the rate at which energy is transformed. A person is limited in the total work he or she can do only by the total energ

Sergio039 [100]

Answer:

Power is the rate at which energy is transformed.

The SI unit of power is the watt.

Power is the rate at which work is done.

Explanation:

In this question we have to choose the statements related to Power that are True.

In this sense, Power $P$ is the speed with which work $W$ is done. Its unit is Watts ( $W$ ), being $1 W=\frac{1 Joule}{1 s}$ .

Power is mathematically expressed as:

$P=\frac{W}{t}$

Where $t$ is the time during which work $W$ is performed.

On the other hand, the Work $W$ done by a Force $F$ refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path. It is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter ( $1J=(1N)(1m)=Nm$ ).

So, according to this explanation, the true statements are:

Power is the rate at which energy is transformed.

The SI unit of power is the watt.

Power is the rate at which work is done.

4 0

3 years ago

Amy counts the wave crests traveling down a stretched string.Five wave crests pass Amy in two seconds.What is the frequency of t

Verdich [7]

The frequency of a wave is a measure of the number of waves that passes through a point per unit of time. It has SI units of s^-1. It is also equivalent to Hertz (Hz). We calculate the frequency of the wave described as follows:

Frequency = 5 waves / 2 s = 2.5 / s or 2.5 Hz

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3 years ago

Wave Properties

OleMash [197]

the wave has a speed of 12 m/s.

Explanation:

Speed is directly proportional to wavelength and frequency. The wave has a frequency of 4 Hz. One Hertz (Hz) is equal to one cycle per second. The image shows that the wave has a wavelength of 3 m. Using the given speed and frequency, the wavelength can be calculated as shown below.

speed= wave length x frequency

speed = 3m x 4Hz

speed = 12m m/6

3 0

3 years ago

Which one of the following are appropriate units for measuring volume?

Stella [2.4K]

Among the choices, the most appropriate unit for measuring volume is cubic centimeters. When measuring the volume of an object, 3 dimensions of an object is taken into consideration. By mathematical analysis, it is understandable that the unit would then be cubed since you would be multiplying 3 dimensions.

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4 years ago