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3 years ago

What do earths system include

Physics

1 answer:

taurus [48]3 years ago

6 0

Answer:

The Atmosphere.

Explanation:

The Atmosphere contains all of the planets air, And without air we can't breathe so I think this would be a good answer for you to choose, have a nice day

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Light traveling though air strikes the surface of the four different materials shown. Which material reflects light but does not

dangina [55]

The spoons .................

8 0

3 years ago

1) Momenum is

adelina 88 [10]

Answer:

momentum formula = Mass × Velocity

3 0

2 years ago

Match these items.

horrorfan [7]

Iron oxide = small region within a magnet
drop or hammer =man-made magnet
strength decreases rapidly with distance lines of force

4 0

2 years ago

3. The center of mass (or center of gravity) of a two-particle system is at the origin. One particle

nika2105 [10]

Answer:

B) (-2.0 m, 0.0 m)

Explanation:

Given:

Mass of particle 1 is, $m_1=2.0\ kg$

Mass of particle 2 is, $m_2=3.0\ kg$

Position of center of mass is, $(x_{cm},y_{cm})=(0,0)$

Position of particle 1 is, $(x_1,y_1)=(3.0\ m,0.0\ m)$

Position of particle 2 is, $(x_2,y_2)=(?\ m,?\ m)$

We know that, the x-coordinate of center of mass of two particles is given as:

$x_{cm}=\frac{m_1x_1+m_2x_2}{m_1+m_2}$

Plug in the values given.

$0=\frac{(2.0\times 3)+(3.0\times x_2)}{2.0+3.0}\\\\0=6+3x_2\\\\3x_2=-6\\\\x_2=\frac{-6}{3}=-2.0\ m$

We know that, the y-coordinate of center of mass of two particles is given as:

$y_{cm}=\frac{m_1y_1+m_2y_2}{m_1+m_2}$

Plug in the values given.

$0=\frac{(2.0\times 0)+(3.0\times y_2)}{2.0+3.0}\\\\0=0+3y_2\\\\3y_2=0\\\\y_2=\frac{0}{3}=0.0\ m$

Therefore, the position of particle 2 of mass 3.0 kg is (-2.0 m, 0.0 m).

So, option (B) is correct.

8 0

2 years ago

A drag racer starts from the rest and accelerates at 7.4m/s^2.how far will he travel in 2.0 seconds?

Vesna [10]

Answer:

14.8 m

Explanation:

S= ut + $\frac{1}{2}$ a $t^{2}$

where u = initial velocity

S= (0 $\frac{m}{s}$ )(2 $s$ ) + $\frac{1}{2}$ (7.4 $\frac{m}{s^{2} }$ )(2 $s^{2}$ )

S= $\frac{1}{2}$ (7.4 $\frac{m}{s^{2} }$ )(2 $s^{2}$ )

S=14.8 m

8 0

2 years ago