Physics College

As water is cooled, its density increases until it reaches about
O A. 25° C
B. -2° C
O c. 4°C
O D.O°C

Answers

Answer 1

Answer:

4 degrees C

Explanation:

this is just a 'known'

Related Questions

An eletrical conductor is a material that allows _____ to travel through it freely​

Answers

Answer:

it allows electric charges to travel through freely

a 50 kg boy runs at 3 m/s. how much momentum does he have

Answers

Answer:

150   kg-m/s

Explanation:

momentum = m * v

50 * 3 = 150

Relative gravitational potential energy depends on gravity, mass, and height measured from the ____.

Answers

Answer:

We dont have a understandable Ansewer for this

Explanation:

A 75-W light bulb is turned on. It has an operating voltage of 120 V. (A)How much current flows through the bulb? (B)What is the resistance of the bulb? (C)How much energy is used each second?

Answers

Required Answer:

Given:

Power (P) = 75 W Voltage (V) = 120 V

(A)

As we know that,

I = P/V

↠ Current = 75/120

↠ Current = 0.625 A

(B)

R = V/I

Here,

R is resistanceV is Voltage, and I is current

↠ Resistance = 120/0.625

↠ Resistance = 192 Ω

(C)

Energy = P × t

Here,

P is power T is time

↠ Energy = 75 × 1

↠ Energy = 75 J

A boat sails for 80 minutes and travels 3.6km. What was its average speed in m/s?

Answers

Answer:

Explanation:

The average speed of the boat:

[tex]\bar{v}=\frac{s}{t}=\frac{3.6}{80}=0.045[/tex] km/min

But if you want to change the unit into m/s, you only take this way:

[tex]0.045 \frac{km}{min}=\frac{0.045\times 1000}{60}=0.75[/tex] in m/s.

The average speed of the boat will be approximately 0.75 m/s.

What is Average speed?

Average speed is the rate of change of change of distance covered with time.

Given is a boat that sails for 80 minutes and travels 3.6 Km.

Distance covered by the boat [ΔD] = 3.6 Km = 3600 m

Time taken [Δt] = 80 minutes = 80 x 60 = 4800 s

Now, we can calculate the average speed using the formula -

s = ΔD/Δt

s = 3600/4800

s = 36/48

s = 0.75 m/s

Therefore, the average speed of the boat will be approximately 0.75 m/s.

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A person sitting on a pier observes incoming waves that have a sinusoidal form with a distance of 2.5 m between the crests. If a wave laps against the pier every 5.0 s, what are (a) the frequency and (b) the speed of the wave?
Remember to identity all of your data, write the equation, and show your work. Additionally, be sure you have answered both a and b of this question.

Answers

Answer:The focal length of a lens is determined by the curve of the lens and the material that the lens is made from.

Explanation:

i just took the test

The frequency is 0.25Hz and the speed of the wave is 0.4m/s.

What is frequency and speed of the wave?

Wave frequency is the number of waves that pass a fixed point in a given amount of time. This equation shows how the three factors are related: Speed = Wavelength x Wave Frequency.

To find the frequency and speed of the wave.

λ=1.6m,T=4s

f=1/T

f=1/4s

f=0.25Hz

The frequency of the wave is 0.25Hz

speed=fλ

speed=(0.25×1.6)m/s

speed=0.4m/s.

The speed of the wave is 0.4m/s.

The frequency is 0.25Hz and the speed of the wave is 0.4m/s.

To learn more about the frequency and speed of the wave refer:https://brainly.com/question/3148541

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