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3 years ago

The noble gases are the least what of any elements on the periodic table

Physics

1 answer:

Stels [109]3 years ago

3 0

The noble gases are the least reactive elements.

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When the only force affecting an object is gravity,that object is in _______________

g100num [7]

Freefall. Just like when the elevator first starts moving or your in space. Not zero gravity but free fall because it's a vacuum so there is no drag, just gravity

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4 years ago

How does the water cycle ensure that we have water?

vladimir2022 [97]

When the heat of the sun shines on the water in oceans, lakes, rivers and streams, the water evaporates, rising up into the air as water vapor. As it moves higher into the sky, it cools.

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3 years ago

Read 2 more answers

A motorcycle, which has an initial linear speed of 9.8 m/s, decelerates to a speed of 2.2 m/s in 3.4 s. Each wheel has a radius

miss Akunina [59]

Answer:

The angular acceleration and angular displacement is $-2.24\ m/s^2$ and 31.34 rad .

Explanation:

Given :

Initial linear speed , u = 9.8 m/s .

Final speed , v = 2.2 m/s .

Time taken , t = 3.4 s .

Radius of wheel , r = 0.65 m .

So , decelerates of wheel is given by :

$v-u=at\\2.2-9.8=a\times 3.4\\a=-2.24\ m/s^2$

Therefore , angular velocity is given by :

$\omega=\dfrac{a}{r}\\\\\omega=\dfrac{-2.24}{0.65}\\\\\omega =-3.45\ rad/s^2$

Now , linear displacement is :

$s=ut+\dfrac{at^2}{2}\\\\s=9.8\times 3.4+\dfrac{-2.24\times 3.4^2}{2}\\\\s=20.37\ m$

Therefore , angular displacement is :

$d=\dfrac{s}{r}\\\\d=\dfrac{20.37}{0.65}\\\\d=31.34\ rad$

Hence , this is the required solution .

4 0

3 years ago

A rock is thrown straight upward off the edge of a balcony that is 5 m above the ground. The rock rises 10 m, then falls all the

Dvinal [7]

Displacement = distance and direction from the start-point
to the end-point, regardless of the route followed on the way.

From the throw to the 'plop', the displacement is 5 meters down.

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3 years ago

Cause and Effect: What would happen to a space vehicle in orbit around Earth if it sped up?

gulaghasi [49]

Answer:

G M m / R^2 = m v^2 / R gravitational force = centripetal force

G M = v^2 R = constant

As v increases R will must decrease

Take the moon as an example

S = 2 pi R where R is about 240,000 miles for one orbit

S / 1 day = 54,000 miles/day for a 28 day circuit

S / 1 hr = 54000 / 24 = 2200 mph which is much less than a satellite in orbit

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3 years ago