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postnew [5]
3 years ago
14

Usually, when the temperture is increased l, what will happen to the ratevof dissolving?

Physics
1 answer:
pochemuha3 years ago
3 0
<span>When temperature is increased, the rate of dissolving increases. The kinetic energy of the molecules of the solute and solvent molecules is high thereby increasing their contact. An example is mixing powdered sugar to the water. When you add water to the sugar, the dissolving process is slow. However, when you increase the temperature of the water by boiling it, the sugar dissolves immediately. </span>
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A car travels for 10s at a steady speed of 20m/s along a straight road. The traffic lights ahead change to red, and the car slow
pentagon [3]
Okay. Draw a graph. Just a square wuth 10 lines in it. And then you can do the problem on that. Its really simple. A car Travels for 10 S at a steady speed of 20 M/S along a Street Rd. The traffic lights ahead and change to read in the car shows down with a constant the deceleration, so that if it stops after in a dish and on eight seconds.

Use your graph yo deduce how far the car has traveled during the 18 seconds described.
18x8x20x10x88=
5 0
3 years ago
) A 1.0kW kettle contains 500g of boiling waterCalculate the time needed to evaporate all the water
Doss [256]

Answer:

t = 1130 s = 18.83 min

Explanation:

First, we will calculate the energy required to evaporate 500 g of water:

E = mL

where,

E = Energy Required for evaporation of water =?

m = mass of water = 500 g = 0.5 kg

L = Latent heat of vaporization of water = 2.26 MJ/kg = 2260 KJ/kg

Therefore,

E = (0.5\ kg)(2260\ KJ/kg)\\E = 1130\ KJ

Now, we will calculate the time required:

P = \frac{W}{t}\\\\t = \frac{W}{P}

where,

t = time = ?

P = Power of kettle = 1 KW

Therefore,

t = \frac{1130\ KJ}{1 KW}\\\\

<u>t = 1130 s = 18.83 min</u>

4 0
2 years ago
A 4.55 nF parallel-plate capacitor contains 27.5 μJ of stored energy. By how many volts would you have to increase this potentia
aivan3 [116]

Answer:

\Delta V=V_{2}-V_{1}=45.4V

Explanation:

The energy, E, from a capacitor, with capacitance, C, and voltage V is:

E=\frac{1}{2} CV^{2}

V=\sqrt{2E/C}

If we increase the Voltage, the Energy increase also:

V_{1}=\sqrt{2E_{1}/C}

V_{2}=\sqrt{2E_{2}/C}

The voltage difference:

V_{2}-V_{1}=\sqrt{2E_{2}/C}-\sqrt{2E_{1}/C}

V_{2}-V_{1}=\sqrt{2*55*10^{-6}/4.55*10^{-9}}-\sqrt{2*27.5*10^{-6}/4.55*10{-9}}=45.4V

5 0
3 years ago
Me kitten runs 40 meters in 8 seconds what is his speed?
AfilCa [17]
The answer is five because if you do 8×n=40 and if you count by five you would get the answer is 5
3 0
3 years ago
Read 2 more answers
What organs are involved in caring out these functions?
11Alexandr11 [23.1K]

The human brain is the body's control center, receiving and sending signals to other organs through the nervous system and through secreted hormones. It is responsible for our thoughts, feelings, memory storage and general perception of the world.

The human heart is a responsible for pumping blood throughout our body.

The job of the kidneys is to remove waste and extra fluid from the blood. The kidneys take urea out of the blood and combine it with water and other substances to make urine.

The liver has many functions, including detoxifying of harmful chemicals, breakdown of drugs, filtering of blood, secretion of bile and production of blood-clotting proteins.

The lungs are responsible for removing oxygen from the air we breathe and transferring it to our blood where it can be sent to our cells. The lungs also remove carbon dioxide, which we exhale.

Skin is important in creating a physical barrier to protect the body from pathogens.

6 0
3 years ago
Read 2 more answers
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