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lesantik [10]
3 years ago
8

What is the cubic meter the basic SI unit for?

Physics
1 answer:
Shalnov [3]3 years ago
8 0
It's the volume of a cube with edges one meter in length.
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The speed of sound is dependent on which of the following?
aleksandr82 [10.1K]
<span>Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second. so that would be answer A</span>
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3 years ago
A tugboat pulls a ship with a constant net horizontal force of 5.00 x 10 to the 3 power n and causes the ships to move through a
Mashutka [201]
Work is force times distance. So here we have
W=(5000N)x(3000m)=1.5x10^7J
Or 15MJ (megajoules)
5 0
3 years ago
Alex, parked by the side of an east-west road, is watching car P, which is moving in a westerly direction. Barbara, driving east
Alexxandr [17]

Answer:

v_{PB} = 130\ km/h

Explanation:

Since, Alex is at rest. Therefore, the speed measured by him will be the absolute speed of car P. Therefore, taking easterly direction as positive:

Absolute\ Velocity\ of\ Car\ P = v_{P} = -78\ km/h

And the absolute velocity of Barbara's Car is given as:Absolute\ Velocity\ of\ Barbara's\ Car = v_{B} = 52\ km/h

Now, for the velocity of Car p with respect to the velocity of Barbara's Car can be given s follows:

Velocity\ of\ Car\ P\ measured\ by\ Barbara = v_{PB} = v_{B}-v_{P}\\\\v_{PB} = 52\ km/h-(-78\ km/h)

v_{PB} = 130\ km/h

6 0
3 years ago
What is the component in a car engine that would detect the need for air?​
Ipatiy [6.2K]

Answer:

Control of air–fuel ratio

Oxygen sensors tell the ECU whether the engine is running rich (too much fuel or too little oxygen) or running lean (too much oxygen or too little fuel) as compared to ideal conditions (known as stoichiometric).

Explanation:

4 0
3 years ago
How much kinetic energy does a 7.2-kg dog need to make a vertical jump of 1.2 m?(gravity is 9.8)
Mekhanik [1.2K]
First, calculate the initial velocity of the dog given with the vertical height and the acceleration due to gravity which is calculated through the equation,
                         2ad = Vo²
Substituting the known values,
                           2(9.8 m/s²)(1.2 m) = V₀²
                                V₀ = 4.85 m/s
The kinetic energy is solved through the equation, 
                         KE = 0.5mv²
Substituting the known values to the latest equation,
                         KE = 0.5 (7.2 kg)(4.85 m/s)²
                          KE = 17.46 J
Thus, the kinetic energy is 17.46 J. 
8 0
3 years ago
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