2. Compare the names of the metal elements by themselves to their names what they are part of andows

Rhea kicks a soccer ball at 13km/h to Sean after kicking the ball the speed of the soccer ball from Rhea reference frame is 13km

Zinaida [17]

Answer:

Sean is standing still, and Rhea is running toward Sean while kicking the ball.

Note: The question is in complete. The complete question is given below:

Rhea kicks a soccer ball at 13 km/h to Sean. After kicking the ball, the speed of the soccer ball from Rhea's reference frame is 13 km/h. The speed of the soccer ball from Sean's reference frame is 22 km/h. Which conclusion is best supported by the information?

Sean is standing still, and Rhea is running toward Sean while kicking the ball.

Rhea is standing still after kicking the ball, and Sean is running away from Rhea.

Both soccer players are standing still after the ball is kicked.

Both soccer players are running while the ball is in motion.

Explanation:

A reference frame is a position from which something is observed.

Since from the reference frame of Rhea, the ball is moving at a speed of 13 km/h after he kicks the ball at a speed of 13km/h whereas from the frame of reference of Sean, the ball is moving at a speed of 22km/h, there is a difference in the speed of the ball as seen from Rhea's and Sean's frame of reference of about 9 km/h. This difference can only be due to relative motion between the ball and Rhea.

Therefore, the best conclusion supported by the given information is that Sean is standing still, and Rhea is running toward Sean while kicking the ball.

4 0

3 years ago

What forms of energy are used in making geothermal energy?

hammer [34]

.....................

3 0

3 years ago

The Milky Way and Andromeda galaxies are members of the Local Group, a cluster of more than 50 galaxies spread across a spherica

fenix001 [56]

Answer:

2400 cm

Explanation:

The milky way has diameter of 100000 light years.

$100000\ ly=24\ cm\\\Rightarrow 1\ ly=\frac{24}{100000}\ cm$

The local group is the collection of galaxies which includes the milky way.

10 million light years is the diameter of the local group.

$10\times 10^6\ ly=10\times 10^6\times \frac{24}{100000}\ cm\\\Rightarrow 10\times 10^6\ ly=2400\ cm$

Hence, the diameter of the scale model of the local group would be 2400 cm

5 0

3 years ago

A tennis player hits a ball 2.0 m above the ground.

tangare [24]

Explanation:

initial height, yo = 2 m

initial velocity, u = 20 m/s

angle of projection,θ = 5 degree

distance of net = 7 m

height of net = 1 m

Let it covers a vertical distance y in time t .

Use Second equation of motion for vertical motion

As it hits the ground in time t, so put y = 0

Taking positive sign, t = 0.84 s

The ball travels a horizontal distance x in time t

X = 20 Cos5 x t

X = 16.76 m

As this distance is more than the distance of net, so it clears the net.

Let t' be the time taken to travel a horizontal distance equal to the distance of net

7 = 20 cos5 x t'

t' = 0.35 s

Let the vertical distance traveled by the ball in time t' is y'.

So,

y' = 2.008 m

So, it clears the net which is 1 m high.

It clears the net by a vertical distance of 2.008 - 1 = 1.008 m and horizontal distance 16.76 - 7 = 9.76 m

your welcome, and have a great day.

8 0

3 years ago

Read 2 more answers

a box container both cube and five side pyramid the total number of objects is 17 the total number of side for the cube and pyra

pashok25 [27]

Answer:

There are 10 cubes in the box

Explanation:

Let the total number of cubes be x and the total number of pyramids be y

Since there are 17 total objects;

Then;

x + y = 17 •••••••••(i)

Also, the total number of sides of cubes is 6 * x = 6x ( a single cube has 6 sides)

For the pyramid we have 5 * y = 5y

adding both gives the total number of sides

6x + 5y = 95 •••••• (ii)

From i, we cabs say y = 17-x

plug this in ii

6x + 5(17-x) = 95

6x + 85 -5x = 95

6x-5x = 95-85

x = 10

5 0

4 years ago