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3 years ago

Which of the following are true statements about the graph below? (choose 2)

Physics

2 answers:

Alexeev081 [22]3 years ago

6 0

Answer:

The amplitude of the wave is decreasing with time.

Something is damping the wave (the amplitude is decreasing with time)

ElenaW [278]3 years ago

5 0

Explanation:

The amplitde is measdured in the +/- y direction. Certainly you can observe that it is changing.

A damped wave is one whose vertical disdtance keeps going down until it is almost a straight line. Smething is causing that. The phenomenon is called damping.

So the answer is the last two. (c and d)

The frequency is measured on the x axis. If the distance between waves changes, then the frequency changes. Wavelength is also measured on the x axis. If the distance occupied by 2 consecutive waves changes , then the wave length changes.

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A protein molecule in an electrophoresis gel has a negative charge.The exact charge depends on the pH of the solution, but 30 ex

Ad libitum [116K]

Answer:

The magnitude of the electric force on a protein with this charge is $7.2\times10^{-15}\ N$

Explanation:

Given that,

Electric field = 1500 N/C

Charge = 30 e

We need to calculate the magnitude of the electric force on a protein with this charge

Using formula of electrostatic force

$F=Eq$

Where, F = force

E = electric field

q = charge

Put the value into the formula

$F=1500\times30\times1.6\times10^{-19}$

$F=7.2\times10^{-15}\ N$

Hence, The magnitude of the electric force on a protein with this charge is $7.2\times10^{-15}\ N$

6 0

3 years ago

Food chains are made up of many_____________. HELP ASAP!!!!!

Mashcka [7]

Hello!

Possible answer could be Organisms

There are a lot of Organisms in the overall food chain.

Hope this helped!

4 0

4 years ago

Read 2 more answers

A 50-g cube of ice, initially at 0.0°C, is dropped into 200 g of water in an 80-g aluminum container, both initially at 30°C.

MakcuM [25]

Answer:

b. 9.5°C

Explanation:

$m_i$ = Mass of ice = 50 g

$T_i$ = Initial temperature of water and Aluminum = 30°C

$L_f$ = Latent heat of fusion = $3.33\times 10^5\ J/kg^{\circ}C$

$m_w$ = Mass of water = 200 g

$c_w$ = Specific heat of water = 4186 J/kg⋅°C

$m_{Al}$ = Mass of Aluminum = 80 g

$c_{Al}$ = Specific heat of Aluminum = 900 J/kg⋅°C

The equation of the system's heat exchange is given by

$m_i(L_f+c_wT)+m_wc_w(T-T_i)+m_{Al}c_{Al}=0\\\Rightarrow 0.05\times (3.33\times 10^5+4186\times T)+0.2\times 4186(T-30)+0.08\times 900(T-30)=0\\\Rightarrow 1118.5T-10626=0\\\Rightarrow T=\dfrac{10626}{1118.5}\\\Rightarrow T=9.50022\ ^{\circ}C$

The final equilibrium temperature is 9.50022°C

4 0

3 years ago

What is true about isolines on a weather map?

Law Incorporation [45]

<span>All isolines, or iso-intensity lines, connect points having equal values.</span>

5 0

4 years ago

Read 2 more answers

The speed of light in a vacuum is 2.998 x 108 m/s. Calculate its speed in miles per hour.

baherus [9]

Answer:

I don't know

Explanation:

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7 0

3 years ago