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vagabundo [1.1K]
3 years ago
5

Why does the frequency of a wave increase as the wavelength decreases? A) because the wave speed remains constant B) because the

amplitude of the wave must remain constant C) because the frequency must get larger to increase the speed D) because the wavelength must get smaller to decrease the speed
Physics
2 answers:
Elanso [62]3 years ago
8 0
A is the correct answer 
Natalija [7]3 years ago
4 0

I will explain for YOU!

Wavelength goes up as frequency goes down because the wave speed remains constant. This is an inverse proportionality. This is because (wavelength x frequency = wave speed). If the wave speed is constant, and wavelength goes down, then frequency must go up to compensate.

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A loaf of bread is removed from an oven and is left sitting in the kitchen to cool. Its temperature t minutes after being remove
Darya [45]
<h2>Answer:</h2>

<em><u>(a). 73° C. </u></em>

<em><u>(b). 176° C.</u></em>

<em><u>(c). 93.02°C.</u></em>

<h2>Explanation:</h2>

In the question,

We have been given an equation,

T(t) = 103e^{-0.0182t}+73.

(a).

We need to find the temperature of the kitchen,

So,

Time, t → ∞

On putting the value of t as infinite in the equation we get,

T(\infty)=103e^{-0.0182*\infty}+73\\T(\infty)=103*0+73\\T(\infty)=0+73\\T(\infty)=73\\

<em><u>Therefore, the temperature of the Kitchen is 73° C. </u></em>

(b).

The initial temperature of the bread when it is removed from the oven is at, t = 0 s

So,

On putting the value of t = 0, we get,

T(t) = 103e^{-0.0182t}+73.\\T(0)=103e^{-0.0182\times 0} + 73\\T(0)=103+73\\T(0)=176

<em><u>Therefore, the initial temperature of the bread is 176° C.</u></em>

(c).

On putting the value of t = 90 minutes, we get,

T(t) = 103e^{-0.0182t}+73.\\T(90)=103e^{-0.0182\times 90} + 73\\T(90)=20.0199+73\\T(90)=93.02

<em><u>Therefore, the temperature of the bread after 90 minutes is 93.02°C.</u></em>

<em><u></u></em>

8 0
3 years ago
Kinetic and
beks73 [17]

Answer:

raise the board to a higher angle

Explanation:

Static friction is the force opposite to the applied force.

Static friction is dependent on the angle of inclination, it means as the angle of incline increases, the force of friction will increases as normal force will decrease.

So, if the board will be raised to a higher angle, it will increase the angle of incline and will overcome the static friction and block will be able slide.

Hence, the correct option is "raise the board to a higher angle".

5 0
3 years ago
1. For each of the following scenarios, describe the force providing the centripetal force for the motion: a. a car making a tur
GenaCL600 [577]

Complete Question

For each of the following scenarios, describe the force providing the centripetal force for the motion:

a. a car making a turn

b. a child swinging around a pole

c. a person sitting on a bench facing the center of a carousel

d. a rock swinging on a string

e. the Earth orbiting the Sun.

Answer:

Considering a

    The force providing the centripetal force is the frictional force on the tires \

          i.e  \mu mg  =  \frac{mv^2}{r}

    where \mu is the coefficient of static friction

Considering b

   The force providing the centripetal force is the force experienced by the boys  hand on the pole

Considering c

     The force providing the centripetal force is the normal from the bench due to the boys weight

Considering d

     The force providing the centripetal force is the tension on the string

Considering e

      The force providing the centripetal force is the force of gravity between the earth and the sun

Explanation:

6 0
3 years ago
An electric flux of 147 N*m^2/C passes through a flat horizontal surface that has an area of 0.824 m^2. The flux is due to a uni
Tresset [83]

Answer:231.16 N/C

Explanation:

Given

Electric Flux=147 N-m^2/C

Area(A)=0.824 m^2

Given Field point above 31.6 ^{\circ}

Therefore angle between Area vector Electric Field =90-31.6=58.4^{\circ}

We know that Flux is given by

\phi =\vec{E}\cdot \vec{A}

\phi =EAcos\theta

147=E\times 0.824\times cos(58.4)

E=231.16 N/C

4 0
3 years ago
How long human can live inside the water without oxygen?
kirill115 [55]
After five to ten minutes of not breathing, you are likely to develop serious and possibly irreversible brain damage.
7 0
3 years ago
Read 2 more answers
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