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3 years ago

6

What is used to measure mass?

2 answers:

erastovalidia [21]3 years ago

6 0

Answer: Scientists often measure mass with a balance

Hope this helps

defon3 years ago

4 0

Answer:

A balance

Explanation:

Scientists measure mass with a balance, such as a triple beam balance or electronic balance. In science, the volume of a liquid might be measured with a graduated cylinder.

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The relative humidity would be ________% if the actual water vapor in the air was 4 grams per cubic meter, the air's capacity to

AveGali [126]

Answer:

50%

Explanation:

Humidity is the amount water vapor present in the atmosphere.

Relative humidity is defined as the ratio of partial water vapor present in air to the actual water vapor at a particular temperature. It is expressed in percentage and the higher the percentage RH, the more the saturated water vapor present in the atmosphere and vice versa.

It is expressed mathematically as shown;

RH = actual water vapor in air/saturated water vapor × 100%

If the actual water vapor in the air was 4 grams per cubic meter and the air's capacity to hold water vapor was 8 grams per cubic meter

Actual water vapor = 4g/cm³

Air's water capacity (saturated water vapor) = 8g/cm³

RH = 4/8×100

RH = 50%

3 0

3 years ago

Consider an ideal monatomic gas of N particles with mass m in thermal equilibrium at a temperature T. The gas is contained in a

harina [27]

Answer:

$K.E.=\dfrac{3}{2}KT$

Explanation:

Given that

Number of particle =N

Equilibrium temperature= T

Side of cube = L

Gravitational acceleration =g

The kinetic energy of an atom given as

$K.E.=\dfrac{3}{2}KT$

Where

Equilibrium temperature= T

Boltzmann constant =K

K =1.380649×10−23 J/K

3 0

3 years ago

At the end of an investigation, you must__________ ____________. Your results may or may not support your hypothesis.

Anna35 [415]

Answer:

could and largejsjisj and we look like they can get to

7 0

3 years ago

A certain reaction with an activation energy of 185 kJ/mol was run at 525 K and again at 545 K . What is the ratio of f at the h

Kazeer [188]

Answer: The ratio of f at the higher temperature to f at the lower temperature is 4.736

Explanation:

According to the Arrhenius equation,

$f=A\times e^{\frac{-Ea}{RT}}$

or,

$\log (\frac{f_2}{f_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$f_1$ = rate constant at 525K

$K_2$ = rate constant at 545K

$Ea$ = activation energy for the reaction = 185kJ/mol= 185000J/mol (1kJ=1000J)

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = 525 K

$T_2$ = final temperature = 545 K

Now put all the given values in this formula, we get

$\log (\frac{f_2}{f_1})=\frac{185000J/mol}{2.303\times 8.314J/mole.K}[\frac{1}{525K}-\frac{1}{545K}]$

$\log (\frac{f_2}{f_1})=0.6754$

$(\frac{f_2}{f_1})=4.736$

Therefore, the ratio of f at the higher temperature to f at the lower temperature is 4.736

8 0

3 years ago

A fisherman sees his boat moving up and down, owing to waves on the water. It takes 2.5 s for the boat to travel from its highes

nata0808 [166]

Answer:

The waves are traveling in a speed of

v=1.20 m/s

Explanation:

The fisherman see a wave at 6m apart so that's the wavelength

$L=6m$

Now the period is the time between two successive waves so

$t=2*2.5s=5s$

The velocity of the waves is describe by:

$v=f*L$

$f=\frac{1}{t}=\frac{1}{5s}=20s^{-1}$

$v=0.20s^{-1}*6m$

$v=1.20 \frac{m}{s}$

7 0

3 years ago