All categories

3 years ago

10dm/s=...m/phút=......km/h

Physics

1 answer:

Lynna [10]3 years ago

8 0

150kmp miles to the second power add all together them together then you get 46 to the 3rd ad 104

You might be interested in

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion?

Mashutka [201]

-2. This is because it is gaining electrons. Electrons are negative. Therefore it is a negative charge.

6 0

3 years ago

A 40-W lightbulb is 1.9 m from a screen. What is the intensity of light incident on the screen? Assume that a lightbulb emits ra

valentinak56 [21]

Answer:

$INTNESITY = 0.88W/m^{2}$

Explanation:

given data:

power P = 40W

Distance of light bulb from screen is R = 1.9 m

The light intensity considered as the light energy falling on the surface per unit area per unit time

Intensity of light can be determined by using following formula

$intesnity = \frac{P} {4\pi R^{2}}$

$intesnity = \frac{40} {4\pi *1.9^{2}}$

$INTNESITY = 0.88W/m^{2}$

8 0

3 years ago

A power plant produces 1000 MW to supply a city 40 km away. Current flows from the power plant on a single wire of resistance 0.

nikitadnepr [17]

Answer:

Current = 8696 A

Fraction of power lost = $\dfrac{80}{529}$ = 0.151

Explanation:

Electric power is given by

$P=IV$

where I is the current and V is the voltage.

$I=\dfrac{P}{V}$

Using values from the question,

$I=\dfrac{1000\times10^6 \text{ W}}{115\times10^3\text{ V}} = 8696 \text{ A}$

The power loss is given by

$P_\text{loss} = I^2R$

where R is the resistance of the wire. From the question, the wire has a resistance of $0.050\Omega$ per km. Since resistance is proportional to length, the resistance of the wire is

$R = 0.050\times40 = 2\Omega$

Hence,

$P_\text{loss} = \left(\dfrac{200000}{23}\right)^2\times2$

The fraction lost = $\dfrac{P_\text{loss}}{P}=\left(\dfrac{200000}{23}\right)^2\times2\div (1000\times10^6)=\dfrac{80}{529}=0.151$

3 0

3 years ago

A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second2. What is the final velocity of the

cupoosta [38]

19.2 meters/second^2 would be the correct answer.

Try multiplying 3.2 meters/second^2 by 6 and you will receive the answer provided above. If you have any further questions, let me know!

8 0

3 years ago

Read 2 more answers

- A ball is thrown at a wall 50 meters away. It takes the ball 5 seconds to get to

zimovet [89]

Answer:

<h3>The answer is 10 m/s</h3>

Explanation:

The average speed of the ball can be found by using the formula

$v = \frac{d}{t} \\$