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Aleonysh [2.5K]
3 years ago
14

13. How much work does a 35 N force do to lift a potted plant from the floor to a shelf 6 m high?

Physics
1 answer:
Nataly_w [17]3 years ago
8 0

Answer:

W= 210 N

Explanation:

Just use work = Fparallel*d

W= 35*6

W= 210 N

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A person is listening with his ear against the rail for an oncoming train. When the train is 1.65 km away, how long will it take
Vitek1552 [10]

Answer:

Time = 0.317 seconds.

Explanation:

Given the following data;

Distance = 1.65km to meters = 1.65 * 1000 = 1650 meters

We know that the speed of sound in steel is equal to 5200m/s

To find the time to hear the sound of the whistle;

Time = distance/speed

Substituting into the equation, we have

Time = 1650/5200

Time = 0.317 seconds.

Therefore, it will take him 0.317 seconds to hear the sound of the whistle.

3 0
3 years ago
A jet engine pushes air at high velocity toward the rear of the plane. Thrust is created moving the plane forward. Which stateme
Lapatulllka [165]
The air pushes the engine with an equal force in the opposite direction.
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5 0
3 years ago
A Pitot-static probe is used to measure the speed of an aircraft flying at 3000 m. If the differential pressure reading is 3300
adell [148]

Answer:

   v = 306.76 Km/h

Explanation:

given,

height of the aircraft = 3000 m

differential pressure reading = 3300 N/m²

density of air = 0.909 Kg/m³

speed of aircraft = ?

Assuming the air flowing above air craft is in-compressible, irrotational and steady so, we can use Bernoulli's equation to solve the problem.

using Bernoulli's equation

          \dfrac{v^2}{2} = \dfrac{\Delta P}{\rho}

where ρ is the density of the air at 3000 m

          v= \sqrt{\dfrac{2 \times \Delta P}{\rho}}

          v= \sqrt{\dfrac{2 \times 3300}{0.909}}

          v = \sqrt{7260.726}

                 v = 85.21 m/s

          v= 85.21 \times \dfrac{3600}{1000}

                 v = 306.76 Km/h

4 0
3 years ago
Energy that is 'lost" to heat, has merely been converted to another form, not<br> lost forever.
MAXImum [283]

Answer: if the heat energy is wasted, then, energy is lost forever.

Explanation: According to conservative of energy, which state that energy is neither created nor destroyed but only convert from one form to another.

The energy which should have been used in one form has been converted to heat energy which could have been used for for thing or the other, if there is nothing the heat energy can be used for, then the energy is wasted. This is tantamount to being lost forever.

6 0
4 years ago
Read 2 more answers
Bella makes the 2.5m distance to her food bowl in 9.1 seconds. What is her average velocity?
e-lub [12.9K]
  • Distance=2.5m
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Average Velocity=Total Distance/Total Time

\\ \sf\longmapsto \dfrac{2.5}{9.1}

\\ \sf\longmapsto 0.3m/s

7 0
3 years ago
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