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grin007 [14]
3 years ago
5

Create a list of three questions that are good science questions.

Physics
1 answer:
masya89 [10]3 years ago
5 0

Answer:

what is speed

how to tell what speed an objeckt is moveing

vlocity

Explanation:

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Give two ways in which the water vapour changes as it passes down the glass tube in the condenser
SCORPION-xisa [38]
<span>It changes from a liquid into a solid which means it is changing states. It also is changing temperature due to the condenser increasing or decreasing the temperature in order for the vapor to be transformed in liquid.</span>
6 0
3 years ago
Alice drops a rock to a well. She hears the splash of the rock 4.1s later. The speed of sound is 340m/s. How deep is the well
Maksim231197 [3]

Answer:

697 m

Explanation:

From the question above,

Note: Alice hears the splash of the rock in the well through the help of echo.

Applying,

v = 2x/t........................ Equation 1

Where v = speed of sound, x = depth of the well, t = time.

make x the subject of the formula in equation 1

x = vt/2................... Equation 2.

Given: v = 340 m/s, t = 4.1 s

Substitute these values into equation 2

x = 340(4.1)/2

x = 697 m.

3 0
3 years ago
Please just give me an answer, thanks.
Colt1911 [192]

#1

\\ \rm\dashrightarrow P=VI\implies V=\dfrac{P}{I}

\\ \rm\dashrightarrow V=\dfrac{0.4\times 10^3}{33\times 10^{-3}}

\\ \rm\dashrightarrow V=0.012\times 10^{-6}

\\ \rm\dashrightarrow V=12mV

#2

\\ \rm\dashrightarrow R=\rho \dfrac{\ell}{A}

\\ \rm\dashrightarrow \rho =\dfrac{RA}{\ell}

\\ \rm\dashrightarrow \rho=\dfrac{86.3(0.4\times 10^6)}{69}

\\ \rm\dashrightarrow \rho=0.5\times 10^{6}

  • It should be silicon

#3

Ohms law

\\ \rm\dashrightarrow R=\dfrac{V}{I}

\\ \rm\dashrightarrow R=\dfrac{7(10^3)}{6(10^{-6})}

\\ \rm\dashrightarrow R=1.167\times 10^9\Omega

7 0
2 years ago
An expensive vacuum system can achieve a pressure as low as 1.00×10^{-7} N/m^2 at 20ºC . How many atoms are there in a cubic cen
marta [7]

Answer:

24.70818432141\times 10^7\ atoms

Explanation:

P = Pressure = 1\times 10^{-7}\ N/m^2

V = Volume = 1 cm³

n = Amount of substance

N = Number of atoms

N_A = Avogadro's constant = 6.022\times 10^{23}\ /mol

R = Gas constant = 8.314 J/k mol

T = Temperature = 273.15+20 = 293.15 K

From the ideal gas law

PV=nRT\\\Rightarrow n=\frac{PV}{RT}

n=\frac{N}{N_A}

\frac{N}{N_A}=\frac{PV}{RT}\\\Rightarrow N=N_A\times \frac{PV}{RT}\\\Rightarrow N=\frac{1\times 10^{-7}\times 1\times 10^{-6}}{8.314\times 293.15}\times 6.022\times 10^{23}\\\Rightarrow N=24708184.32141\ atoms=24.70818432141\times 10^7\ atoms

The number of atoms is 24.70818432141\times 10^7\ atoms

8 0
3 years ago
1.) What causes ocean tides
BigorU [14]

Answer: Tides are periodic rises and falls of large bodies of water. Tides are caused by gravitational interaction between the earth and the moon. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon.

4 0
3 years ago
Read 2 more answers
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