Help me with this problem please? c:Which appliance uses more energy?

A.) a 30-watt CD player used for 3 hours (10,800 seconds)
B.) a 300-watt blender used for 2 minutes (120 seconds)
C.) a 1,500-watt hair dryer used for 3 minutes (180 seconds)
D.) a 200-watt computer used for 10 hours ( 36,000 seconds)

Answers

Answer 1

Answer: 30*3*60=5400
300*2=600
1500*3=4500
200*10*60=120000

the computer uses more energy.
(you can multiply all results by 60 to get the energy in J, but it's not necessary for the comparison)

Answer 2

Answer:

Answer:

a 200-watt computer used for 10 hours ( 36,000 seconds)

Explanation:

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Which of the following solutes dissolved in 1000g of water would provide the fewest number of particles?A) 1000 g of glucose (C6H12O6)
B) 1000 g of sodium chloride (NaCl)
C) 1000 g of calcium carbonate (CaCO3)
D) 1000 g of potassium sulfate (K2SO4)

Answers

Answer:

Option A

Explanation:

The number of particles a solute provides in a solution depends on its chemical formula and how it dissociates or ionizes in water.

A) 1000 g of glucose (C6H12O6) does not ionize or dissociate in water, so it remains as individual molecules. Therefore, it provides the fewest particles since it's composed of only C, H, and O atoms.

B) 1000 g of sodium chloride (NaCl) dissociates into two ions (Na⁺ and Cl⁻) in water, so it provides two particles per formula unit.

C) 1000 g of calcium carbonate (CaCO3) can dissociate into three ions (Ca²⁺, CO₃²⁻) in water, so it provides three particles per formula unit.

D) 1000 g of potassium sulfate (K2SO4) can dissociate into three ions (2K⁺ and SO₄²⁻) in water, so it also provides three particles per formula unit.

So, option A, 1000 g of glucose (C6H12O6), provides the fewest number of particles because it doesn't dissociate or ionize in water.

What is the function of a capacitor?

Answers

Answer:

What is a capacitor?

Capacitor, a electronic component to hold charges, represented by the letter C. It composes of two metal electrodes between a layer of insulating dielectric. When a voltage is applied between the two metal electrodes, the charge is stored on the electrode, so the capacitor is an energy storage electrical part. Any of two conductors that are insulated and close to each other form a capacitor. In addition, the parallel plate capacitor consists of the electrode plate and the dielectric of the capacitor.

Capacitor is one of the widely used electronic components in electronic equipment. It is widely used in stopping DC and alternating AC, coupling, bypass, filtering, tuning loop, energy conversion, control and so on. Capacitor is different from capacitance. The capacitance is the basic physical quantity, the symbol C, the unit is F (Farah).

Explanation:

I. Capacitor characteristics

II. Functions of capacitor in electrical circuits

When alvin woke up in the morning it was -9 degrees by the morning it was -2 degrees what is the change in temperatures

Answers

The change in temperature from -9 degrees to -2 degrees is 7 degrees.

Final answer:

The change in temperature from -9 degrees to -2 degrees is a rise of 7 degrees.

Explanation:

The change in temperature is calculated by subtracting the initial temperature from the final temperature. In this case, Alvin woke up to a temperature of -9 degrees. By end of the morning, the temperature had risen to -2 degrees. So, to find out the change in temperature, subtract the initial temperature from the final temperature, which is -2 - (-9), this equals to 7 degrees.

Learn more about Change in Temperature here:

brainly.com/question/28884653

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An upward force is applied to a 6.0–kilogram box. this force displaces the box upward by 10.00 meters. what is the work done by the force on the box?

Answers

Answer:

The work done by the force on the box is W = 588 J

Explanation:

The work done by the force on the box can be expressed as:

$W=mg(h_(2)-h_(1))$

where m is the mass of the box, g is the gravitational force g= $g=9.8(m)/(s^(2))$ and $h_(2)$ , $h_(1)$ are the heights of the box in at final and initial moment.

Replacing the values, you have:

$W=6.0kg*9.8(m)/(s^(2))*(10.00m-0.00m)$

$W=588(kgm^(2))/(s^(2))$

that is W = 588 J

work = fs = mgh [Ep] = 6(10)(10) = 100

What does the Doppler Effect tell astronomers about the universe?

Answers

The doppler effect tells us that as an object moves away from another object, the wavelength increases, and vice versa. So, if the universe is expanding and things are moving away from where you are, the wavelength from the light source, such as a galaxy, would increase. Also, if the universe was contracting and things were getting closer to where you are, the wavelength of the light emitted from the galaxy would decrease

Does sit-ups reduce belly fat?

Answers

yes it does because it exercises the muscles :))

It does. When you are doing sit ups, it makes your core work and if you have a good strong core then you are burning fat.

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