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3 years ago

What's the difference and similarity between O2 and 2 O ?

1 answer:

4 0

O2 refers to two oxygen atoms bonded together, while 2 O refers to two oxygen atoms that are not bonded to each other. They both have two oxygen atoms, but in O2, the oxygen atoms are bonded, while in 2O, the atoms are not.

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A ball is whirled on the end of a string in a horizontal circle of radius R at constant speed v. Which way(s) can increase the c

Sav [38]

Answer:

A, B and F are the right answers

Explanation:

The formula is $a_{c} = v^{2} / r$

A) Increasing both the radius and the speed by a factor of 9

$a_{c} = (9v)^{2} / (9r)$ = $9v^{2} / r$

which means the acceleration will increase by a factor of 9

B) Keeping the speed fixed and decreasing the radius by a factor of 9

$a_{c} = (v)^{2} / (r/9)$ = $9v^{2} / r$

which means the acceleration will increase by a factor of 9

C) Keeping the radius fixed and increasing the speed by a factor of 9

$a_{c} = (9v)^{2} / (r)$ = $81v^{2} / r$

It will increase the acceleration 81 times

D) Keeping the speed fixed and increasing the radius by a factor of 9

$a_{c} = (v)^{2} / (9r)$ = $v^{2} / 9r$

It will decrease the acceleration by 9 times

E) decreasing both the radius and the speed by a factor of 9

$a_{c} = (v/9)^{2} / (r/9)$ = $v^{2} / 9r$

It will decrease the acceleration by 9 times

F) Keeping the radius fixed and increasing the speed by a factor of 3

$a_{c} = (3v)^{2} / (r)$ = $9v^{2} / r$

It will increase the acceleration by 9 times

4 0

3 years ago

Explain giving an example for;

Bingel [31]

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The motion of a ball falling through the atmosphere, or a model rocket being launched up into the atmosphere are both excellent examples of Newton’s 1st law of motion.

Riding a bicycle is a good example of Newton’s 2nd law of motion.In this example, the bicycle is the mass. The leg muscles pushing on the pedals of the bicycle is the force.

You hit a wall with a certain amount of force, and the wall returns that same amount of force. This is an example of Newton’s 3rd law of motion

6 0

3 years ago

An object has a velocity of 8 m/s and a kinetic energy of 480 j what is the mass of the object

dedylja [7]

We Know,

K.E. = 1/2 mv²

480 = 1/2 (m)(8)²

m = 960/64

m = 15 Kg

So, the mass of the object is 15 Kg

7 0

3 years ago

Read 2 more answers

Which perspective believes that behavior is learned through rewards and punishments

SCORPION-xisa [38]

Behaviorism is the aspect of psychology that believes that behavior is learned through rewards and consequences. There have been many scientific studies conducted on this idea.

8 0

3 years ago

PLEASE HELP, I am desperate. This part of the presentation I am completely lost with. It is STEP 6, I got the rest finished.

yKpoI14uk [10]

Answer:

Explanation:

Ok, pick some idea from here

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&ved=2ahUKEwjWoLaFypvnAhUowlkKHXZrCMkQFjAJegQIBBAB&url=https%3A%2F%2Fwww.wappingersschools.org%2Fcms%2Flib%2FNY01001463%2FCentricity%2FDomain%2F1552%2FGravity.ppt&usg=AOvVaw1N8kqPWy6ERpA3LNbbepit

5 0

3 years ago