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3 years ago

Which amount of power is the smallest?

Physics

2 answers:

Ede4ka [16]3 years ago

4 0

The correct answer is

D- 4 watts

In fact, the different prefixes correspond to the following:

kilowatt: $1 kW = 10^3 W$

megawatt: $1 MW=10^6 W$

gigawatt: $1 GW=10^9 W$

Using the list above, we can convert all the options into Watts:

A) $1 GW=1 \cdot 10^9 W$

B) $2 kW=2 \cdot 10^3 W$

C) $3 MW=3 \cdot 10^6 W$

D) $4 W$

Therefore, the smallest quantity is D) 4 Watts.

Zinaida [17]3 years ago

3 0

D is the correct answer. A watt is the smallest amount of power. The prefix kilo means a thousand, mega means a million and giga means a billion, so, in increasing size: watt - kilowatt - megawatt - gigawatt.

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A scuba tank, when fully submerged, displaces 16.7 L of seawater. The tank itself has a mass of 13.4 kg and, when "full," contai

meriva

Answer:

$m = 17.87 kg$

Explanation:

As we know that tank itself has mass given as 13.4 kg

so it is given as

$m_1 = 13.4 kg$

also the tank contains air in it and the mass of air inside the tank is also given as 4.47 kg

so it is

$m_2 = 4.47 kg$

so total mass of the tank is the mass of the empty tank and mass of air in the tank

$m = m_1 + m_2$

$m = 13.4 + 4.47$

$m = 17.87 kg$

3 0

3 years ago

Find the 24th term of the arithmetic sequence 11, 14, 17, … . Express the 24 terms of the series of this sequence using sigma no

Anna71 [15]

Answer:

The 24th term is 80 and the sum of 24 terms is 1092.

Explanation:

Given that,

The arithmetic series is

11,14,17,........24

First term a = 11

Difference d = 14-11=3

We need to calculate the 24th term of the arithmetic sequence

Using formula of number of terms

$t_{n}=a+(n-1)d$

Put the value into the formula

$t_{24}=11+(24-1)\times3$

$t_{24}=80$

$t_{24}=u_{24}=80$

We need to calculate the sum of the first 24 terms of the series

Using formula of sum,

$S_{n}=\dfrac{n}{2}(a+u_{24})$

Put the value into the formula

$S_{n}=\dfrac{24}{2}\times(11+80)$

$S_{n}=1092$

Hence, The 24th term is 80 and the sum of 24 terms is 1092.

5 0

4 years ago

A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?

Trava [24]

Answer:

23.49m

Explanation:

Distance = velocity x time

8.7 x 2.7 = 23.49m

8 0

3 years ago

A toy cannon tosses a rubber ball straight upward. A motion sensor measures the speed of the ball as it leaves the cannon. Using

mezya [45]

Answer:

With this information is not possible to calculate the mass.

Explanation:

This is a characteristic problem of energy conservation, where kinetic energy becomes potential energy. For this particular problem, we have the initial speed as input data. The moment the ball comes out of the cannon we have the maximum kinetic energy, as the ball goes up the ball will gain more potential energy as the ball loses kinetic energy, until the moment the ball reaches the maximum height. At the maximum height point, the ball will have its maximum potential energy while its kinetic energy is zero. In other words, all the kinetic energy that was, in the beginning, was transformed into potential energy.

$E_{p}=E_{k}\\m*g*h=0.5*m*v^2$

In the above equation the masses are canceled and we can determine the maximum height, by means of the initial speed.

$h=\frac{0.5*v^2}{g} [m]$

But the mass cannot be determined, since it would be necessary to know the value of the energy, in order to determine the value of the mass.

3 0

3 years ago

If the mass of a material is 122 grams and the volume of the material is 10 cm3, what would the density of the material be?

sergij07 [2.7K]

Since d=m/v. 122 g (mass) divided by 10 cm3 (volume)=12.2 g/cm3
Your answer would be 12.2 g/cm3

3 0

4 years ago