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zvonat [6]
3 years ago
13

If it takes 15 minutes to dry your hair with a 1.200 kW hair drier, how much energy is used in drying your hair?

Physics
2 answers:
Elodia [21]3 years ago
6 0
1.2 kW * 0.25 h = 0.300 kWh
Katen [24]3 years ago
5 0

Answer: Option (A) is the correct answer.

Explanation:

The given data is as follows.

     Power = 1.200 kW,         Time = 15 minutes = \frac{15min}{60 min/hr} = 0.25 hour

     Energy = ?

Thus, calculate the energy by using the formula as follows.

               Power = \frac{Energy}{Time}

               Energy = Power × Time

                            = 1.200 kW × 0.25 hr

                            = 0.300 kWh

Thus, we can conclude that 0.300 kWh energy is used in drying your hair.

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Why does a 10 gram piece if copper take up more space than a 10 gram piece of gold
algol [13]

Answer:

because the mass of the copper is higher than the mass of the gold.

Explanation:

7 0
3 years ago
A 0.14-MIN baseball is dropped from rest. It has a momentum of 0.90 kg⋅m/skg⋅m/s just before it lands on the ground.
nikitadnepr [17]

The time spent in the air by the ball at the given momentum is 6.43 s.

The given parameters;

  • <em>momentum of the ball, P = 0.9 kgm/s</em>
  • <em>weight of the ball, W = 0.14 N</em>

The impulse experienced by the ball is calculated as follows;

Ft = \Delta P

where;

Ft is impulse

\Delta P is change in momentum

The time of motion of the ball is calculated as follows;

t = \frac{\Delta P}{F} \\\\t = \frac{0.9 - 0}{0.14} \\\\t = 6.43 \ s

Thus, the time spent in the air by the ball at the given momentum is 6.43 s.

Learn more here:brainly.com/question/13468390

7 0
2 years ago
Compare and contrast the strength of the forces between two objects with a mass of 1 kg each, a charge of 10
DochEvi [55]

Answer:

Let's see the similarities between the two forces

* are proportional to the product of a magnitude, mass or charge

* They are inversely proportional to the square of the distance

* They are long-range forces since zero is not made up to an infinite distance. The gravitational force is always attractive, the electrical force can be attractive or repulsive.

The differences in them

* The electric force in much greater than the gravitational force

* The gravitational force is always attractive, the electrical force can be attractive or repulsive.

Explanation:

Let's start by calculating each force.

Gravitational force

             F =G \frac{m_1m_2}{r^2}  

let's calculate

             F = 6.67 10⁻¹¹  1  1 / 1²

             F = 6.67 10⁻¹¹ N

Electric force

             F = k \frac{q_1q_2}{r^2}  

indicates that the charge is q = 10 C

            F = 9 10⁹ 10 10 / 1²

            F = 9 10¹¹ N

Let's see the similarities between the two forces

* are proportional to the product of a magnitude, mass or charge

* They are inversely proportional to the square of the distance

* They are long-range forces since zero is not made up to an infinite distance. The gravitational force is always attractive, the electrical force can be attractive or repulsive.

The differences in them

* The electric force in much greater than the gravitational force

* The gravitational force is always attractive, the electrical force can be attractive or repulsive.

3 0
3 years ago
HELP A.S.A.P<br> SCIENCE
Nimfa-mama [501]

I think its d, it is pointing to the whole circle which prob rlly makes it a proton

8 0
3 years ago
Read 2 more answers
What is the formula for displacement
pogonyaev
Displacement is usually given to you as it is, but you can also get displacement through velocity by Δd= Δv*t, where  <span>Δv is the change in velocity and t is the change in time. 

</span>
4 0
3 years ago
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