helppppppppppppppppppp

Answer:

A

Explanation:

smh man do better this is too easy

can someone help me rq?

will give brainliest plz help!!!!!!!

If an element has an atomic number of 25, then the atom will have

Question 1 options:



A. 25 protons



25 neutrons



B. 50 electrons



C.50 protons


Question 2 (1 point)



If you subtract the atomic number from the atomic mass number, you can find:


A. the number of neutrons



B. the number of protons



C. the number of electrons



D. the number of isotopes of that element

Question 3 (1 point)



Isotopes of an element differ in the number of


A. neutrons



electrons



B. nucleus



C. protons

Practice Activity:
.
In this experiment, the team will need to set up three different cups and label them as A,
B, and C. All three cups will get the same amount of water added to them. In order to
see how kinetic energy is transferred, the team needs to measure the initial
temperatures of each cup and record that in the data table, and then add different
amounts of ice to cups B and C. The mass of each amount of ice will be recorded in the
data table. After each ice cube melts, the team will record the temperature of the water
in each cup.
o The change in temperature will tell the team how much kinetic energy was
transferred from the water to the ice.
Think about how one can work effectively in a team to set the experiment up.
gather data, and analyze the data.
o
Mass Ice Added
Initial
Temperature
Final
Temperature
Cup A (Control)
Cup B
Cup С

The independent variable in Part I, the one that is intentionally manipulated, is the
.

The independent variable in Part II, the one that is intentionally manipulated, is the
.

The independent variable in Part III, the one that is intentionally manipulated, is the
.

The independent variable in Part IV, the one that is intentionally manipulated, is the
.

Please help!!!! If something is shot straight up in the air at a speed of 70 m/s, how much time before it will hit the ground? (when I calculated it I got 14 is it right?) My following question is if the object from number 2 is shot up (70m/s) in the air how high will it get?

Officials are looking into three different ski accidents. The accidents happened when three skiers (all with the same mass) were skiing across the flat, snowy ground. They were each bumped by another skier, but not all from the same direction. These skiers changed speed as a result of being bumped. Use the information in the diagram to answer.

Which skier(s) experienced the strongest force when bumped? How do you know?


a
The skiers in the yellow and purple sweaters; both gained the same force as they sped up, but the skier in the red sweater lost force and slowed down.

b
The skier in the yellow sweater experienced the strongest force because he has the fastest ending speed.


c
All three skiers experienced the same strong force because they changed speed by the same amount.


d
The skier in the red sweater because it takes a stronger force to slow something down than to speed it up.

Four students are carrying out different laboratory procedures.
Piroja is mixing baking soda and vinegar to see if it reacts.
Jason is heating salt water over a burner until the water evaporates.
Kali is putting crushed ice and ice cubes on a table to see which melts first.
Francisco is separating iron filings from sand using a magnet.
Which experiment relies on convection?
Piroja’s experiment
Jason’s experiment
Kali’s experiment
Francisco’s experiment

Bart ran 5000 meters from the cops and had an average speed of 6 meters/second before he got caught. How long did he run?

The lithosphere contains rocks, soils, and minerals.

Read the passage.


Gerald lives in a town that has experienced a population boom in recent years. Until last year, all of the town’s major decisions and policies were made at town meetings. All of the town’s residents were invited to these meetings, and every resident was allowed to debate and vote on the decisions that were made. Last year, due to the town’s expanding population, the townspeople voted to end the town meetings and to instead elect town council members who would be responsible for hearing citizens’ concerns and attending regular council meetings. Major decisions and policies for the town are now made only by these elected council members at town council meetings.
THE QUESTION- Which type of government was in place in Gerald’s town before the town council was established?
Answers:

#1 a dictatorship

#2 a direct democracy

#3 an absolute monarchy

#4 a representative democracy

In 2-4 sentences, summarize what you know about EM waves.


PLEASE HURRY! I'M TIMED! WILL GIVE BRAINLIEST!

Take Look at the picture and answer the question correctly.

In this circuit, which bulb, when burned out, will cause all other bulbs to stop glowing?

A. A

B. B

C. C

D. F

Which of these subatomic particles is found in the nucleus of an atom?
a. the protons and electrons
b. the neutrons and electrons
c. the protons
d. protons and neutrons

what are two factors that cause changes in the motion of surface currents like the Gulf Stream?

What is going on in this situation?

What happens at the dew point?
Answer: Clouds are formed

What causes rain?
Answer: dust particles can no longer support water droplets

The return of water vapor to the liquid form is called:
Answer: condensation

Water vapor is produced by the process of:
Answer: evaporation

What happens to air when it is heated by the sun?
Answer: It rises

The photo shows a system that consists of a person on a diving board. What change could you make to the system that would decrease its total energy?


A. Replace the diver with someone who has more mass.

B. Decrease the height of the diving board.

C. Increase the length of the diving board.

D. Increase the height of the diving board.


*If you do not know the answer, then DON'T respond. I will report you. Also, explanations are appreciated but if not then that's fine.

A mass of 80 g of KNO3 is dissolved in 100 g of water at 50 ºC. The solution is heated to 70ºC. How many more grams of potassium nitrate must be added to make the solution saturated? Explain your reasoning

What is going on in this situation?

If I had a boat, and it had a higher density than water, would it matter only the density thats keeping the boat up or the shape too?

Arturo dreams about travelling to faraway stars someday. He read that the closest star to Earth is Proxima Centauri, which is 4.25 light years away. He also read that the Law of Special Relativity says that the mass of an object increases as its speed increases. It approaches infinity as it approaches the speed of light. How does this most likely affect the goals of the United States space program?

Look at the graph pic and answer the question correctly!

HELP FAST CORRECT ANSWERS ONLY 20PTS
Select the correct answer.
Which absolute magnitude rating would be the dullest?
A. -6
B. 0
C. +2
D. -1

Drag the tiles to the correct boxes to complete the pairs.
Match the following phases of stellar evolution to its characteristic.