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3 years ago

The temperature of water in a beaker is 45°C. What does this measurement represent?

Physics

2 answers:

julia-pushkina [17]3 years ago

8 0

Your answer would be C, with a quick lookup of this question online lol

ollegr [7]3 years ago

8 0

Answer:

C. The average kinetic energy of water particles.

Explanation:

As it mentioned Temperature 45°, this clearly specify we are talking about kinetic energy of water particles, as temperature is nothing but the average of kinetic energy of particles randomly moving in water.

The more hotter the water, particles will move more vigorously hence more will be the average kinetic energy.

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Two bicycle tires are set rolling with the same initial speed of 4.00 m/s along a long, straight road, and the distance each tra

77julia77 [94]

Answer:

The coefficient of rolling friction for the tire under low pressure is 0.0342.

Explanation:

Two bicycle tires are set rolling with the same initial speed of 4.00 m/s

Final speed of both the bicycle, speed is reduced by half is measured, v = 2 m/s.

Here,

$u_kmg = ma\\\\a=\mu g$

Using third equation of motion as :

$v^2-u^2=2as\\\\v^2-u^2=2\mu gs\\\\\mu =\dfrac{v^2-u^2}{2gs}\\\\\mu =\dfrac{4^2-2^2}{2\times 9.8\times 17.9}\\\\\mu=0.0342$

So, the coefficient of rolling friction for the tire under low pressure is 0.0342.

5 0

3 years ago

5 uses of mechanical energy

Oksi-84 [34.3K]

Answer: The 5 uses of mechanical energy are: 1) Hammering a nail

2) Using Dart gun 3) Moon 4) Hydropower plant 5) Sharping a pencil.

8 0

3 years ago

OleMash [197]

Answer:

R= 5.4 ohms

Explanation:

Given that

V= 9 V

Power ,P= 15 W

Lets take resistor resistance = R

We know that Power given as

$P=\dfrac{V^2}{R}$

V=Voltage

P=Power

R=Resistance

$R=\dfrac{V^2}{P}$

Now by putting the all the values in the above equation

$R=\dfrac{9^2}{15}$

R= 5.4 ohms

Therefore the resistance of the resister will be 5.4 ohms.

7 0

3 years ago

PLS ANSWER FAST 15 POINTS

marusya05 [52]

Answer:

$the \: force \: between \: the \: objects \: doubles$

4 0

3 years ago

The first astronomer to show that spiral nebulae (today called spiral galaxies) have large Doppler shifts was

solong [7]

William Parsons was the first astronomer to show that spiral nebulae have large Doppler shifts.

<h3>What are Spiral nebulae?</h3>

In space, a nebula is a huge cloud of gas and dust. Some nebulae, including multiple nebulae, are made of gas and dust that have been released from the explosion of a dead star called a supernova. There are other nebulae that are star-forming regions.
Edwin Hubble began observing Cepheid variables in many spiral nebulae, including the alleged Andromeda Nebula, in 1923, demonstrating that they are, in fact, full-fledged galaxies outside our own. Since then, the phrase spiral nebula has lost favor.
One group of astronomers believed that spiral nebulae were parts of our Milky Way galaxy, whereas the other group believed that these objects were actual galaxies that were outside of the Milky Way galaxy.

To learn more about Nebulae visit:

brainly.com/question/6452529

#SPJ4

8 0

2 years ago