What's the answer to this problem?

Answers

Answer 1

Answer: Acceleration = (change in speed) / (time for the change)

Acceleration = (12.15 - 0) / 4.5 = 2.7 meters per second²

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A cellist tunes the C string of her instrument to a fundamental frequency of 65.4 Hz . The vibrating portion of the string is 0.600 m long and has a mass of 14.4 g .What is μ, the mass per unit length of the string?
To determine the wave speed from purely kinematic quantities, you need to know the wavelength of the wave. What is the wavelength λ of the fundamental mode in the C string of the cello?

Answers

Explanation:

Given that,

Fundamental frequency of the string, f = 65.4 Hz

Length of the string, l = 0.6 m

Mass, m = 14.4 g = 0.0144 kg

(a) Let $\mu$ is the mass per unit length of the string. It can be calculated as :

$\mu=(m)/(l)$

$\mu=(0.0144\ kg)/(0.6\ m)$

$\mu=0.024\ kg/m$

(b) If f is the fundamental frequency of the string, the wavelength of the fundamental mode is given by :

$l=(n\lambda)/(2)$

$\lambda=(2l)/(n)$

n = 1

$\lambda=2l=2* 0.6\ m$

$\lambda=1.2\ m$

Hence, this is the required solution.

The mass per unit length of the string is 0.024 kg/m, and the wavelength is 1.2 meters.

What is the frequency?

It is defined as the number of waves that crosses a fixed point in one second known as frequency. The unit of frequency is per second.

We have:

Fundamental frequency = 65.4 Hz

Length of the vibrating string portion = 0.6 meter

Mass of the vibrating string portion = 144 grams

We know the formula for mass per unit length:

$\rm \mu = (m)/(l)$

$=\rm (0.0144 \ kg)/(0.6 \ meter)$ ( m = 144 grams ⇒ 0.0144 kg)

$\rm \mu = 0.024 \ kg/m$

The wavelength of the fundamental mode is given by:

$\rm l =(n\lambda)/(2)$

$\rm \lambda = (2l)/(n)$

$\rm \lambda = 2* 0.6 \Rightarrow 1.2 meter$ (n = 1)

Thus, the mass per unit length of the string is 0.024 kg/m, and the wavelength is 1.2 meters.

Learn more about the frequency here:

brainly.com/question/27063800

You put a piece of ice into a glass of lemonade at room temperature. Which statements explains the heat flow in this scenario? A. Heat flows in both directions. B. Heat flows from the ice to the lemonade. C. Heat flows from the lemonade to the ice. D. Heat flows from the ice to the lemonade to the glass.

Answers

Answer:

C. Heat flows from lemonade to the ice

Explanation:

Transfer of heat from the drink to the ice is what melts the ice and cools the drink.

Which statement describes a characteristiccommon to all electromagnetic waves and
mechanical waves?
(1) Both types of waves travel at the same speed.
(2) Both types of waves require a material medium
for propagation.
(3) Both types of waves propagate in a vacuum.
(4) Both types of waves transfer energy.

Answers

"(4) Both types of waves transfer energy." is the best option from the list regarding the characteristics common to all electromagnetic waves and mechanical waves

Answer: The correct answer is (4).

Explanation:

Electromagnetic wave is the transverse wave. It is produced by the moving charged particle. It travels at the speed of the light. It does not require a medium to travel. It can travel through the vacuum.

In mechanical wave, there is an oscillation of matter. It requires a medium to travel.It cannot travel through vacuum. The three types of mechanical waves are longitudinal wave, transverse wave and surface wave.

The common characteristics to all electromagnetic waves and mechanical waves are both can move through matter and both can occur as a result of a disturbance. This disturbance is a result of wave transfer energy.

Therefore, the common characteristic to all electromagnetic and mechanical waves is both types of waves transfer energy.

Juana performs the calculation below. 6.05 + 3.156 + 5.0 How should she report the answer using the correct number of significant figures?

Answers

Juana performs the calculation of6.05 + 3.156 + 5.0. The answer is 14.206. Juana should report the answer as 14by using the correct number of significant figures. In adding numbers withsignificant figures, Juana should note that the number of significant figuresthat she can report should be the minimum.

Answer:

THE ANSWER IS C 14.2

Explanation:

I just took the test

Which lighting direction is used to create silhouettes?

Answers

Backlighting is used to create silhouettes

HOPED I HELPED

Backlight is the answer

A material that transmits nearly all the light in a ray because it offers little resistance to the light is A. translucent.
B. opaque.
C. fluorescent.
D. transparent.

Answers

Answer

D. transparent.

Explanation.

Materials can be classified into three in relation to how light pass through them.

Translucent. These are materials that allow light to pass through them but you can not see through them. A good example of this material is the glass that is used to make doors of a bathroom.

Opaque. These are material that cannot at all allow light to go through them. Examples are; Thick metals, concrete, wood and many others.

Transparent. Theses are materials that allow light to go through them and also you can see through them. A good example is the windscreen of a car.

With this information the correct answer is D. transparent.

The answer is D, transparent

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