All categories

3 years ago

What activities belong at the top of the physical activity pyramid

Physics

1 answer:

amm18123 years ago

8 0

Answer: Cut down on watching tv, sitting down for more than 30 minutes at a time, and playing video games.

Explanation:

You might be interested in

The acceleration due to gravity for any object, including 1 washer on the string, is always assumed to be m/s2. The mass of 3 wa

Pachacha [2.7K]

Answer:

The force will increase in proportion to the mass of the objects

Explanation:

The acceleration due to gravity is always the same. It is expressed in meters per second squared or m/s². The figure of 9.81 m/s² is an average value that was taken after calculating the acceleration under different surfaces. In fact, the acceleration differs depending on the shape of the part of the earth in relation to the earth's magnetic field and force.

Thus, if one washer was 20 kg, the acceleration being 9.81 m/s² the weight will be:

F = ma

= $20 * 9.81\\= 196.2 N$

If there are there washers, the weight will be:

F = 3 * 20 * 9.81

= 588.6 N

5 0

3 years ago

Read 2 more answers

Two blocks on a frictionless horizontal surface are on a collision course. one block with mass 0.6 kg moves at 0.8 m/s to the ri

Elanso [62]

First we can say that since there is no external force on this system so momentum is always conserved.

$m_1v_{1i} + m_2v_{2i} = m_1v_{1f} + m_2v_{2f}$

$0.6*0.8 + 1.2*0 = 0.6*v_{1f} + 1.2*v_{2f}$

$0.48= 0.6*v_{1f} + 1.2*v_{2f}$

$0.8 = v_{1f} + 2v_{2f}$

now by the condition of elastic collision

$v_{2f} - v_{1f} = 0.8 - 0[\tex]now add two equations[tex]3*v_{2f} = 1.6$

$v_{2f} = 0.533 m/s$

also from above equation we have

$v_{1f} = -0.267 m/s$

So ball of mass 0.6 kg will rebound back with speed 0.267 m/s and ball of mass 1.2 kg will go forwards with speed 0.533 m/s.

8 0

4 years ago

Which property of water allows large organisms like the blue whale to swim in the ocean and not be crushed by their body weight?

Liono4ka [1.6K]

The property that allows large organisms like the blue whale to swim in the ocean an not be crushed by their body weight is density. If the whale has a higher density than water, it will submerge in the water.

3 0

3 years ago

Which motor and body should Devon use to build the car

Fynjy0 [20]

Answer:

is there any pictures or diagrams that i could use to base this question off of

Explanation:

5 0

3 years ago

Which statement best explains that sound waves are pressure waves?

Sholpan [36]

A
TTTTTTTTTTTTTTTTTTTTTT<span>T</span>