Help me guys plzlzlz

i think its d because 900+1200 is 2100, but im probably wrong for question 1

1. reaction that releases heat
outer ear
2. flow of electrons through a material toward a positive charge
compression
3. build up of electrons in a material
static electricity
4. part of the ear is responsible for capturing sound waves
exothermic
5. part of the sound wave where the molecules are pressed closely together
current electricity

If you have a parallel circuit with a battery (4 ohms), a light bulb (2 ohm), and a fan (3 ohms), how would you find the total resistance of the circuit?

determine the volume of a substance given that the density is 2.6 g/mL and its mass 5.5 g​

AHHHH PLS HELP ME I BEG ILL DO ANYTHING
When going from a slower medium to a faster medium, light is bent _____.
A. toward the normal line
B. away from the normal line

Who inspires you? Who do you aspire to be like?
Shark diving, bungee jumping, or skydiving?
What's your favorite cheesy pick-up line? Have you ever used it in real life?
What's your favorite Disney movie?
What is the weirdest scar you have and how did you get it?
Where did you and your best friend meet?
Which of your accomplishments are you most proud of?
What's the weirdest Wikipedia rabbit hole you've stumbled down?
Tell me about the best vacation you've ever taken.
What's your favorite physical attribute about yourself?
Friday night—would you rather stay in or go out?
Do you believe in ghosts?
What piece of art (book, music, movie, etc.) most influenced the person you are today?
Which would be harder for you to give up: coffee or alcohol?
What's the single best piece of advice you ever received?
Who's your best friend, and what do you love about him or her?
What's the greatest risk you've ever taken?
If you had 24 hours to do whatever you wanted in this city, what would you do?
What do you like about where you work?
What hobby have you always wanted to develop?

Which of the following is true with regard to sodium and potassium?
A
The both have three outer shell electrons.
B
They both have filled orbitals.
C
They tend to form anions.
D
They tend to form cations.

What is a wet celled battery composed of? Give an example of a wet celled battery.

A student used a portable electric drill to remove screws from a broken wooden table. He noticed that the screws holding the table together were warm to the touch after being removed from the wood. Which statement best explains this phenomenon?
A:Electrical energy from the drill was converted into chemical energy due to conductivity.
B:The process of removing the screw concentrated the thermal energy that was already present in the wood

Explain how scientist learned about the magnetic poles of the Earth.

need help as soon as possible ill give brainliest!!!!!!!!!!!!!!!!

A scientist works for a drug company and runs experiments on their product with results that favor the company's product. This is an example of_________.

(A.) conflict of interest and confirmation bias.


(B.) getting the inside scoop about a product, buying company stock, and making a lot of money.


(C.) sound and reliable science practices.


(D.) all the above.

Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer

jenny turned on the fan in her bedroom. what energy transformation took place when she turned on the fan

What is an important characteristic for chemicals released into the environment used to seed clouds?

HELP PLS THIS IS DUE IN 15 MINUTES PLS PLS PLS!!! I WILL MARK BRAINLIEST IWTH THE BEST ANSWER!!!
List 2 Physical Changes & 2 Chemical Changes and explain why.

If you push on an object with great force, but it does not move:

a. no work is done
b. a great amount of work is done
c. a small amount of work is done
d. energy is created

Choose all the answers that apply.

The sun _____.

a. creates energy from fission reactions
b. creates energy through fusion reactions
c. transfers heat through radiation
d. is made of hydrogen and helium
e. uses its own mass to create energy

Uranium is a radioactive element that is highly unstable and it has a half-life of 4.5 billion years. Uranium comes in many different forms (shown below). Looking at the nuclear notations below, what is the neutron number of both of the elements below? What is the relationship of the two elements below?
A: U-235 has 235 neutrons, U-238 has 238 neutrons and they are isotopes of each other.
B: U-235 has 143 neutrons, U-238 has 146 neutrons and they are isotopes of each other.
C: U-235 has 235 neutrons, U-238 has 238 neutrons and they are ions of each other.
D: U-235 and U-238 have 92 neutrons and they are ions of each other.

calculate the density of an objects whose mass is 93.2 g and its volume is 4.67​

I need your help.

What is the basis of an organic molecule?

(A). The basic structure is the iron atom.
(B). The basic structure is the potassium atom.
(C). The basic structure is the carbon atom.
(D). The basic structure is a carbon monoxide molecule.

There are 3 different answers you can pick from.

no coefficient
2
3

Which is the best way to define wind?

a
Wind is the movement of air from areas of low pressure to areas of high pressure
b
Wind is the movement of air to a colder area in the atmosphere.
c
Wind is the movement of air from areas of high pressure to areas of low pressure.
d
Wind is the movement of air pushed around and bouncing off Earth's surface.

You see a worm crawling along the ground and wonder if scientists consider it living or nonliving. Which item below would not be true when classifying the worm as living or non‐living?
A worm can move so it must be living.
A worm can reproduce and make little baby worms (called wormlets) so it must be alive.
Worm’s pass dirt through their body pulling food out and discarding the stuff they don’t want so it must be alive.
If you cut a worm in half, it can re‐grow so it must be alive.

Isopropyl alcohol is a clear liquid with a density of 0.78 g/cm3. If the same small sphere (with a density of 0.88 g/cm3) is dropped in a beaker of isopropyl alcohol, predict whether the sphere will float or sink?

Before you can solve a problem, the first thing you have to do is Question 2 options:

define the problem
build a prototype
design your solution
test your solution