After exercise your heart rate is

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

Please help..................

worty [1.4K]

Answer:

PART A

In a solid

The attractive forces keep the particles together tightly enough so that the particles do not move past each other. ... In the solid the particles vibrate in place. Liquid – In a liquid, particles will flow or glide over one another, but stay toward the bottom of the container.

In a liquid

Particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles.

A gas

The particles move rapidly in all directions, frequently colliding with each other and the side of the container. With an increase in temperature, the particles gain kinetic energy and move faster.

PART B

The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.

Explanation:

GOOD LUCK!!! :)

7 0

3 years ago

(a) Calculate the height of a cliff if it takes 2.45 s for a rock to hit the ground when thrown straight up from the cliff with

ANEK [815]

An object in free fall motion is under the influence of gravitational force only

The height and time are;

(a) The height of the cliff, h ≈ 8.00 meters

(b) The time it takes the rock to rich the ground with the same speed going downward is approximately 0.67 seconds

The reason the above values are correct are as follows:

The given parameters are;

The time it takes for the rock to hit the ground when thrown straight up from the cliff, t = 2.45 s

The initial velocity with which the rock is thrown, u = 8.75 m/s

(a) To find the height of the cliff

Solution

The kinematic equation of motion is s = y₀ + u·t + (1/2)·g·t²

The time it takes to maximum height, $t_{max}$ = 8.75/9.81

The time it takes to get back to the cliff edge when thrown = 2 × 8.75/9.81

The time taken to fall at the velocity of u downwards from the cliff edge, $t_{cliff}$ , is given as follows;

$t_{cliff}$ = 2.45 - 2 × 8.75/9.81 ≈ 0.666

Height of cliff, h = 8.75×(2.45 - 2 × 8.75/9.81) + (1/2) × 9.81 × (2.45 - 2 × 8.75/9.81)² ≈ 8

The height of the cliff, h ≈ 8.00 meters

(b) The time it takes the rock to rich the ground when thrown straight down art the same speed, (calculates above) = $t_{cliff}$ ≈ 0.67 seconds

Learn more about free fall motion here:

brainly.com/question/13297394

7 0

3 years ago

Newton’s first law of motion is also called the law of ???

bezimeni [28]

Answer:

Law of Inertia

Explanation:

Newton's first Law of Motion is the Law of Inertia, which describes that an object at rest remains that way, and an object in motion stays in motion until it is met by an unbalanced force.

6 0

3 years ago

How do you juju on that beat?

Elena L [17]

Answer:lol

Explanation:lmafo

8 0

4 years ago