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ratelena [41]
3 years ago
15

When two or more forces act on an object at the same time what are they called

Physics
1 answer:
Vilka [71]3 years ago
7 0

Unbalanced forces is what they are called

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A speaker emits sound waves in all directions, and at a distance of 28 m from it the intensity level is 73 db. What is the total
Oduvanchick [21]

Answer:

P=0.197 Watt

Explanation:

Given That

B=73dB

Io= 1 * 10^-12

I=Io * 10^{\frac{B}{10} } \\I=2 * 10^{-5} Wm^{-2}  \\A=4 * pi * r^{2}\\ A=9852.03 m^{2}\\ Power= I * A\\P= 0.197 Watt

6 0
3 years ago
The Burj Khalifa in Dubai is the world's tallest building. The structure is 828 m (2716.5 ft) and has more than 160 stories. A t
lakkis [162]

Explanation:

Below is an attachment containing the solution.

5 0
3 years ago
Which phrase best describes a machine?
Nastasia [14]

Answer:

All of the above.

Explanation:

All Machines make work easier.

They can move objects.

They have multiple parts.

And the use energy.

5 0
3 years ago
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explain how a maglev train provides evidence that magnetic fields can apply forces between objects that do not touch.
Furkat [3]

Answer:

Powerful electromagnets are fitted on top of guideways either ttract or repel the magents fitted on the bottom of train. The froce of attraction/repulsion rasies the train in hovering position.

Explanation:

Magentic fields exist between two opposite/like poles. The poles do not have to be touching each other. They can be separated by a distance in a medium that doesn' block magnetic field.

In magelv train the magnetic forces between two poles are used to operate the train. The two poles are separated by train body and air.

4 0
3 years ago
You find a pressure gauge in the lab and the spec sheet says that the maximum pressure it can read a maximum of 2 inches of wate
Inessa05 [86]

Answer:

Maximum pressure in pascal is 497.84 pa

Explanation:

Pressure is given by P=\rho g h

where \rho is density of water = 1000kg/m^3

height of the water h is 2 inches = 2\times 25.4=50.8 mm=50.8\times 10^{-3} m

Maximum pressure in pascal is

P=1000\times 9.8\times 50.8\times 10^{-3}\\p=497.84 Pa

8 0
3 years ago
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