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3 years ago

All waves transmit energy. Only one type of wave does not require a medium to transmit energy. That is a _____wave?

Physics

2 answers:

SpyIntel [72]3 years ago

8 0

Sound because it’s that one

Dmitrij [34]3 years ago

6 0

Answer:

sound waves

Explanation:

jejehwherrbjwhsbwwbdbehej

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When a wave has λ=3 m and f=15 Hz, what is the speed of the wave?

Tamiku [17]

Wave speed = (wavelength) x (frequency)

Wave speed = (3 m) x (15 Hz)

<em>Wave speed = 45 m/s</em>

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3 years ago

Why does the total amount of energy before and after any energy transformations remain the same?

Georgia [21]

The amount of energy before and after any energy transformations remain the same because energy cannot be created or destroyed. From the law conservation of energy; any time energy is transferred between two objects, or converted from one form into another, no energy is created and none is destroyed. The total amount of energy involved in the process remains the same.

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3 years ago

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Researchers have measured the acceleration of racing greyhounds as a function of their speed; a simplified version of their resu

natita [175]

$\Huge\boxed{\boxed{\dfrac{4}{5}\ \text{meters}}}$

Let's start by finding the time it takes for the dog to reach a velocity of $4$ m/s.

We can use the following equation, where $v_i$ is initial velocity, $v_f$ is final velocity, $t$ is time, and $a$ is acceleration.

$v_f-v_i=at$

We're trying to solve for $t$ first, so divide both sides by $a$ .

$\dfrac{v_f-v_i}{a}=t$

Substitute in the known values.

$\dfrac{4-0}{10}=t$

$\dfrac{4}{10}=t$

$\dfrac{2}{5}=t$

Now, we can use the following formula to find the distance.

$s=v_it+\dfrac{1}{2}at^2$

Substitute in the known values.

$s=0*\dfrac{2}{5}+\dfrac{1}{2}*10*(\frac{2}{5})^2$

Anything multiplied by $0$ is

$s=\dfrac{1}{2}*10*(\frac{2}{5})^2$

Just simplify from there.

$s=\dfrac{1}{2}*10*\dfrac{4}{25}$

$s=5*\dfrac{4}{25}$

$s=\dfrac{20}{25}$

$s=\boxed{\dfrac{4}{5}}$

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3 years ago

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Sobre un cuerpo de 700 g de masa que se apoya en una mesa horizontal se aplica una fuerza de 5N en la dirección del plano. Calcu

kicyunya [14]

Answer:

(a) Ff = 3.95N

(b) Ff = 5N

Explanation:

(a) To find the friction force you use the second Newton law:

$F=ma$

But you take into account the applied force and the opposite friction force:

$F_a-F_f=ma$

you do Ff the subject of the formula and replace the values of the parameters:

$F_f=F_a-ma=5N-(0.700kg)(1.5m/s^2)\\\\F_f=3.95N$

(b) In the case of a motion with constant velocity you have that there is no acceleration. Hence:

$F_a-F_f=0\\\\F_f=F_a\\\\F_f=5N$

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4 years ago

One source error is __________, and one of its solutions is having a lie scale inserted into the assessment. A. social desirabil

8090 [49]

The correct answer is B; Deliberate deception

Further Explanation:

Deception is one when a person is fully aware of what they are doing. They are hiding the truth and making a conscious decision to tell someone something that has no truth. Deception can also be used when describing a magic trick such as a sleight of hand.

Lie scales are used when there are redundant questions that ask the same questions over and over with different formats to see if the answers are consistent over time.

Learn more about assessments at brainly.com/question/556621

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3 years ago

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