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lorasvet [3.4K]

2 years ago

14

when heated the temperature of a water sample increased from 15°C to 39°C. Is absorbed 41840 joules of heat. what is the mass of

the sample

1 answer:

Hunter-Best [27]2 years ago

6 0

Answer:

Mass of water: 43 g

Explanation

hope it helps

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In Millikan’s experiment, the oil droplets acquire one or more negative charges by combining with the negative charges that are

alina1380 [7]

Answer:

$-9.6\cdot 10^{-19} C$

Explanation:

The charge of a single electron is:

$q=-1.60\cdot 10^{-19} C$

If a droplet contains N electrons, then its charge would be:

$Q=Nq$

In this case, the droplet has

N = 6

electrons, so its total charge is

$Q=(6)(-1.60\cdot 10^{-19}C)=-9.6\cdot 10^{-19} C$

7 0

2 years ago

A 450-N rightward force is used to drag a large box across the floor with a constant velocity of 1.2 m/s. The coefficient of fri

Nikolay [14]

Answer:

the mass of the box is 51.98 kg.

Explanation:

Given;

applied horizontal force, F = 450 N

coefficient of friction, μ = 0.795

constant velocity, v = 1.2 m/s

At constant velocity, the acceleration of the object is zero and the net force will be zero.

$F_{Net} = F - F_k\\\\0 = F - F_k\\\\F_k = F\\\\\mu \ N = F\\\\\mu (mg) = F\\\\m = \frac{F}{\mu g} \\\\m = \frac{405}{0.795 \ \times \ 9.8} \\\\m = 51.98 \ kg$

Therefore, the mass of the box is 51.98 kg.

8 0

2 years ago

A parallel beam of light containing orange (610 nm) and violet (410 nm) wavelengths goes from fused quartz to water, striking th

Fudgin [204]

Answer:

0.98°

Explanation:

First we find the refracting angle of orange in water

Which is given as

စr= sin^-1. ( 1.456 sin60°/1.33)

= 71.2°

Then that of violet in water

စv=sin^-1. ( 1.468sin60°/1.342)

= 72.3°

So angle between boths colours is the difference

71.2- 72.3= 0.98°

6 0

3 years ago

The amount of energy (measured in calories) required to increase the temperature of 1 gram of a substance by 1 degree Celsius is

Softa [21]

Answer:

Specific Heat

Explanation:

It is the definition of is Specific Heat which is the amount of heat (calories) per unit mass (gram) required to raise the temperature (1°C)

Its unit is calories/g °C

5 0

2 years ago

What is laplace law???????

cestrela7 [59]

${\texttt{\huge{\red{ANSWER :-}}}}$

<h3><u>L</u><u>A</u><u>P</u><u>L</u><u>A</u><u>C</u><u>E</u><u> </u><u>L</u><u>A</u><u>W</u><u> </u><u>:</u><u>-</u></h3>

Laplace's law for the gauge pressure inside a cylindrical membrane is given by

<h3>ΔP = γ/r</h3>

<u>W</u><u>h</u><u>e</u><u>r</u><u>e</u>

γ => surface tension

r => the radius of the cylinder

Note : there is an inverse relation between the pressure and the radius.

8 0

2 years ago