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4 years ago

HELP!!!

2 answers:

5 0

We shall consider two properties:
1. Temperature difference
2. Thermal conductivity of the material

Use a cylindrical rod of a given material (say steel) which is insulated around its circumference.

One end of the rod is dipped in a large reservoir of water at 100 deg.C and the other end is dipped in water (with known volume) at 40 deg. C. The cold water if stored in a cylinder which is insulated on all sides. A thermometer reads the temperature of the cold water as a function of time.

This experiment will show that
(a) heat flows from a region of high temperature to a region of lower temperature.
(b) The thermal energy of a body increases when heat is added to it, and its temperature will rise.
(c) The thermal conductivity of water determines how quickly its temperature will rise. If mercury replaces water in the cold cylinder, its temperature will rise at a different rate because its thermal conductivity is different.

BabaBlast [244]4 years ago

5 0

How do mass and the type of material affect thermal energy transfer? This is the e2020 sample response.

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PLEASE HELP THIS IS TIMED I WILL PICK YOU THE BRAINLIEST!!!!!!!!!!!How are secondary colors of light related to the primary colo

Kipish [7]

Explanation:

Because combining primary colors od light like red, blue, and green created secondary colors like yellow, cyan, and magenta

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3 years ago

Which gas law states that the pressure of a gas decreases when volume is increased and the temperature is unchanged?

NeX [460]

Which gas law states that the pressure of a gas decreases when volume is increased and the temperature is unchanged?

A. The General Gas Law

B. The Law of Cubic Expansion

C. Charles' Law

D. Boyle's Law

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3 years ago

A runner starts from rest and in 2 s reaches a speed of 7 m/s. If we assume that the speed changed at a constant rate (constant

PtichkaEL [24]

Answer:

$v=3.5\frac{m}{s}$

Explanation:

The average speed is defined as:

$v=\frac{\Delta x}{\Delta t}$

Using the equations for uniformly accelerated motion, we calculate the runner's acceleration:

$a=\frac{v_f-v_o}{2}\\a=\frac{7\frac{m}{s}-0\frac{m}{s}}{2s}\\a=3.5\frac{m}{s^2}$

Now, we can calculate the distance that the runner travels:

$\Delta x=v_0t+\frac{at^2}{2}\\\Delta x=(0\frac{m}{s})(2s)+\frac{3.5\frac{m}{s}(2s)^2}{2}\\\Delta x=7m$

Finally, we calculate the runner's average speed:

$v=\frac{7m}{2s}\\v=3.5\frac{m}{s}$

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3 years ago

What will happen to the volume if the temperature of the gas is increased?

Nimfa-mama [501]

Answer: The volume of the gas increases as the temperature increases. As temperature increases, the molecules of the gas have more kinetic energy. therefore it increases! Hope this helps you!

Explanation:

3 0

3 years ago

Read 2 more answers

If 12V is applied to a circuit containing a single 10kΩ 1/4W resistor, will it be safe to operate the circuit?

Nata [24]

Yes, it is safe to operate the circuit, before the power dissipated is less than the maximum power

Explanation:

For a resistor, the power rating gives the maximum power at which the resistor is safe to operate.

For the resistor in this problem, this maximum power is given and it is

$P_{max}=\frac{1}{4}W=0.25 W$