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2 years ago

A mercury thermometer reads 10oC when dipped into melting ice and 90oC

Physics

1 answer:

Crank2 years ago

3 0

Answer:

Thermometer will read 26 degrees Celsius.

Please vote for Brainliest and I hope this helps!

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Materials that are poor conductors of thermal energy are called.....

Anettt [7]

First one, insulator. Second one, conductor.

5 0

3 years ago

Which statement best describes an insulator?

Otrada [13]

Answer:an insulator does not allow electrons to move through it

Explanation:

4 0

3 years ago

Read 2 more answers

Which statement is true?

saveliy_v [14]

Statement A is true.

When two resistors are connected in series, they result in an equivalent resistance greater than their individual values. A larger resistance causes lesser current to flow.

When two resistors are connected in parallel, they result in an equivalent resistance lesser than their individual values. A lesser resistance causes more current to flow.

So statement A is the correct answer.
When two resistors are connected in series, there is less total current in the circuit than if the two resistors were connected in parallel.

7 0

4 years ago

Consider a corn yield of 7,500 kg/hectare (equivalent to 120 bushels per acre). If 25 kg (one bushel) of corn consumed about 20m

Alla [95]

Answer:

$\frac{W_{1}}{W_{2}} = 0.5$

Explanation:

The ratio of the weight of corn to the weight of water consumed will be the same. Either we compare the total weights for the total amount of corn or we compare only a small proportion of it. So, we consider the given 25 kg of corn. So, the mass of corn is given:

m₁ = mass of corn = 25 kg

Now, for mass of water, we will use its density:

ρ₂ = m₂/V₂

m₂ = ρ₂V₂

where,

m₂ = mass of water = ?

V₂ = Volume of water consumed by 25 kg corn = 20 m³

ρ₂ = density of water = 1000 kg/m³

Therefore,

m₂ = (1000 kg/m³)/(20 m³)

m₂ = 50 kg

Now, we calculate the ration:

$\frac{Weight of Corn}{Weight of Water} = \frac{W_{1}}{W_{2}} = \frac{m_{1}g}{m_{2}g}$

$\frac{W_{1}}{W_{2}}=\frac{m_{1}}{m_{2}} = \frac{25 kg}{50 kg}$

$\frac{W_{1}}{W_{2}} = 0.5$

6 0

3 years ago

When a pair of 10-N forces act on a box of candy, the net force on the box is

schepotkina [342]

Answer:

D Any of the above depending on the directions of forces.

Explanation:

The net force on the box depends on the direction of the forces.

For example, we have three special cases:

- If the two forces are in the same direction, they add to each other, so the net force is

F = 10 N + 10 N = 20 N

- If the two forces are in opposite directions, the net force is given by the difference between the two forces, so

F = 10 N - 10 N = 0 N

- If the two forces are perpendicular to each other, their resultant is given by the Pythagorean theorem:

$F=\sqrt{(10 N)^2 + (10 N)^2}=14.1 N$

If the two forces are at any other angle, their resultant can be found by resolving each force along the x- and y- direction, and adding the components along each direction. The resultant net force will have a magnitude between 0 N and 20 N.

4 0

3 years ago