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2 years ago

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Ralph is also swinging at the park. He has a mass of 72.6 kg, and his maximum velocity at the lowest point in his swing is 7.3 m

/s. What is Ralph’s maximum kinetic energy? Hint: Kinetic Energy = 1/2 Mass x Velocity-squared

1 answer:

pashok25 [27]2 years ago

4 0

Bsbsb s sbsb sbsbbsbdb

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. One long wire carries a current of 30 A along the entire x axis. A second-long wire carries a current of 40 A perpendicular to

d1i1m1o1n [39]

Answer:

magnitude of net magnetic field at given point is

$B = 5 \times 10^{-6} T$

Explanation:

As we know that magnetic field due to a long current carrying wire is given as

$B = \frac{\mu_o i}{2\pi r}$

here we we will find the magnetic field due to wire which is along x axis is given as

$i = 30 A$

r = 2 m

now we have

$B_1 = \frac{4\pi \times 10^{-7} (30)}{2\pi (2m)}$

$B_1 = 3\times 10^{-6} T$ into the plane

Now similarly magnetic field due to another wire which is perpendicular to xy plane is given as

$i = 40 A$

r = 2 m

now we have

$B_2 = \frac{4\pi \times 10^{-7} (40)}{2\pi (2m)}$

$B_2 = 4\times 10^{-6} T$ along + x direction

Since the two magnetic field is perpendicular to each other

So here net magnetic field is given as

$B = \sqrt{B_1^2 + B_2^2}$

$B = 5 \times 10^{-6} T$

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2 years ago

true or false the speed of sound traveling through steel is much less than the speed of sound traveling through air

Misha Larkins [42]

This is false. Sound travels faster through steel. That is why you can see people in movies putting their ear on the railroads to see whether a train is coming. That is because they can't hear it through air, but the sound travels through the steel.

4 0

2 years ago

Read 2 more answers

At the System Demo, each team demonstrates their own work but the system is not integrated. They say they underestimated the int

Verdich [7]

Answer:

The scrum master can suggest that:

Postpone the work on system integration for a while until the train is in sustain and enhance the section of road map of implementation

Explanation:

System Demo:

It is such a software that is used to measure the progress of Agile Release Train.

As the teams didn't expect that the integration of system will be a difficult task and they ultimately failed to accomplish the goal of integration so that scrum master asked them to stop working on the system integration until the Agile Release Train's sustainability and to improve and optimize the implementation of road map.

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2 years ago

How could rescue workers use squeezing or compressing to get energy to their flashlights during rescue missions?

svlad2 [7]

Answer:

They can do this with the help of mechanical power generated from the human muscle.

Explanation:

Since rescue workers engage in missions where it is usually difficult for them to get electrical energy to their devices and working tools, they could employ various materials that can be sourced around them to get energy to their tools. One of such is the mechanical power generated from the human body through squeezing and compressing.

Some green devices such as the dyno torch have been designed to be powered through this method. Repeated squeezing of its flywheel allows light to be generated.

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2 years ago

What is the main reason the chemical energy of a fuel is never entirely converted to mechanical energy in an engine?

IgorLugansk [536]

Answer: Option A) Some of the energy is lost as heat

Explanation:

Energy conversion is not always 100% accurate. In engines, due to the friction generated as machine parts roll over another some of the chemical energy of the fuel is lost as heat. That is why machine parts are lubricated to reduce friction, and then energy loss.

Thus, 100% chemical energy does not yield 100% mechanical energy, as some are lost as heat.

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2 years ago