Swinging a baseball bat is an example of a ___ lever

Answers

Answer 1

Answer: Third class lever!!!!!!!!!!!!!!!!!!!!!!!!

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Why are most cells 70 percent water?

Answers

Cells are the units that together make the organism. Most of the cells are 70% water as it is the most abundant molecule that makes the cytoplasm and organelles.

What is a cell?

A cell is a structural organization that is composed of various organic, and inorganic substances that also have water as the most abundant molecule. It is the most important component that is needed for cellular and metabolic reactions.

It makes the cytoplasm of the cell that occupies most of the cell portion. Water is the most important reactant and the product of the photosynthesis and respiration processes of plant and animal cells. Water is needed by the cell to transport the nutrients and the waste, and even in cell signaling.

Therefore, cells are made of 70% water as the component.

Learn more about cell here:

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because most of the chemical reactions that happen in your metabolism happen in water.

Other names of tornadoes

Answers

There are many names for tornadoes that isn't tornadoes, the second most used one that I know is twisters. Hope I helped!

Twisters is one of the names. :)

A 60-gram sample of radioactive isotope is measured after two half-lives have passed. What pair of percentages describe the sample after two-half lives? A.) 50% unchanged and 50% stable B.) 25% unchanged and 75% stable C.) 12.5% unchanged and 87.5% stable D.) 75% unchanged and 25% stable

Answers

Answer: B.) 25% unchanged and 75% stable

Explanation:

Now, to calculate the initial amount of radioactive isotope

$a=(a_o)/(2^n)$

where,

a = amount of reactant left after n-half lives = 60 g

$a_o$ = Initial amount of the reactant = ?

n = number of half lives= 2

Putting values in above equation, we get:

$60=(a^0)/(2^2)$

$a_0=240g$

Thus percentage of sample unchanged= $(60)/(240)* 100\%=25\%$

The percentage of sample decayed or has become stable= $(180)/(240)* 100\%= 75\%$

Answer:

B. 25% unchanged and 75% stable

Explanation:

Edge 2021

Which of the following describes the energy transformation that takes place when a boy eats an apple and then lifts weights?1. Chemical energy is converted to mechanical and heat energy.
2.Chemical energy is converted to mechanical energy.
3. Chemical energy is converted to heat energy.
4. Chemical energy is converted to mechanical and kinetic energy.

Answers

the correct answer is 1. Chemical energy is converted to mechanical and heat energy.

When the boy eats apple, the chemical energy of the apple first converted in the heat energy in the process of digestion, which maintains our body temperature, than the body of the boy converts the heat energy into mechanical energy.

Therefore the correct option is 1.

Answer:

Chemical energy is converted to mechanical and heat energy.

Explanation:

If an object is accelerating to the right , then net force on the object must be directed towards the right ! True Or False ?

Answers

Not so fast.

I think you're using 'accelerating' to mean 'speeding up', but you really need
to be more careful with it. "Acceleration" means ANY change in speed OR
direction.

If an object's speed to the left is decreasing, or its speed to the right is
increasing, then the net force on the object must be directed towards
the right.

If an object is moving with constant speed in a circular path, then it's
constantly accelerating, because its direction is constantly changing.
The force on it is always directed towards the center of the circle, so
there's one point on the path where the force is directed straight to the right.

This is correct. Just think about it. If you push an object to the right then it will accelerate to the right.

When a wave enters a medium and changes into another form of energy, usually TE, This is called:a. absorption
b. transmission
c. reflection
d. refraction

Answers

Answer:

transmission hope this helps

The answer is b. Transmission

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A 2-kg bowling ball sits on top of a building that is 40 meters tall. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has:2. A 2-kg bowling ball rolls at a speed of 5 m/s on the roof of the building that is 40 tall. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has: 3. A 2-kg bowling ball rolls at a speed of 10 m/s on the ground. Circle one: KE / GPE / both Show your work for finding the values of each type of energy the object has: 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?2. A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at? 3. A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?