Answer: magnet, fridge and uh......metal
Explanation:
Answer:
Heres a few, I hope this is what you are talking about :)
Iron
Nickel
Cobalt
Neodymium
Speakers
Earbuds
Headphones
Cabinet Latch
Explanation:
How much energy (joules) is needed to heat 250 grams of water from 22 °C to 99 °C?
Answer:
[tex]\boxed {\boxed {\sf 80, 465 \ Joules}}[/tex]
Explanation:
We can use the specific heat formula, which is:
[tex]q=mc \Delta T[/tex]
Where q is the energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
We know the mass is 250 grams. The specific heat capacity of water is 4.18 joules per gram degree Celsius. Let's find the change in temperature.
ΔT = final temperature - initial temperatureΔT= 99°C- 22°ΔT= 77°CNow we know all the values:
m= 250 g c= 4.18 J/ g °CΔT= 77°CSubstitute the known values into the formula.
[tex]q=(250 \ g) (4.18 \ J/g \textdegree C)(77 \ \textdegree C)[/tex]
Multiply the first 2 numbers together. The grams will cancel out.
[tex]q=1045 \ J/ \textdegree C (77 \textdegree C)[/tex]
Multiply again. This time the degrees Celsius will cancel out.
[tex]q=80465 \ J[/tex]
The energy needed is 80, 465 Joules.
Explain how scientists learned about the magnetic poles of the Earth.
pls, help me w at least 1 sentence.
Answer:
ocean basalts
Explanation:
As the sea floor slowly spreads, the igneous rock(ocean basalts) of which it is comprised cools and congeals, recording the earth's current magnetic pole alignment.
Please help! 30 points!
Which of the following is an example of the geosphere interacting with the cryosphere? (5 points)
Erosion due to glaciers creates valleys.
Frost damages the cells in plant tissues.
Plant roots make cracks in rocks and soil.
Metals are obtained from minerals by humans.
erosion is geosphere and glaciers are cyrosphere
What are the advantages of an electromagnet?
PLS HELP ME... at least 1 sentence not from internet
Answer:
Versality, adjustable strength, greater control over the magnetic field and durability.
Explanation:
A yellow haze in the air caused by particles from cars and factories is _____.
A. acid rain
B. smog
C. oxygen
D. carbon dioxide
Answer:
b. smog
Explanation:
Answer:
B. Smog
Explanation:
Smog is found in the ozone or a yellow haze in the air caused by particles from cars and factories.
HELP I NEED HELP ON THIS QUESTION THIS QUESTION IS A TRUE OR FALSE QUESTION ......hERE IS THE QUESTION.......Temperature is the measure of the average kinetic energy of a substance. _______________
True
OR
False
Answer:
True
Explanation:
Temperature is measuring how fast the molecules or atoms of a substance are vibrating. Since movement is kinetic energy, temperature is a measurement of that kinetic energy.
Which statement is true about the properties of water, hydrogen, and oxygen?
A) Water has the exact same properties as both oxygen and hydrogen.
B)Water has the same properties as hydrogen, but not oxygen.
C)Water has the same properties as oxygen, but not hydrogen.
D)Water has completely different properties than hydrogen and oxygen
Velocity must always include?
A student mixed 68 grams of vinegar with 7 grams of baking soda. The solution bubbled as sodium acetate (white solid), carbon dioxide, (gas) and water were produced. If sodium acetate and water in the flask weigh 60 grams, how much carbon dioxide was lost to the environment?
Answer:
15 grams of carbon dioxide
Explanation:
You would just add 68+7 and that gives you 75. Next subtract 75-68 and that gives you 15.
which is right for brainliest
Answer:
Explanation:
Its A
Please help with this question!
The answer, please!!!!!!!!!1
Answer:
A. and C.
Explanation:
B. is talking about volcanic rock and D. is talking about Metamorfic rock so A. and c. must be a about sedimentart rock (to be honest i don't understand C. but it definetly isn't B. or D. so it must be C.)
How much energy (joules) is needed to heat 250 grams of copper from 22 °C to 99 °C? The specific heat capacity (C) of copper is 0.386 J/g°C.
Answer:
7430.5 Joules (7.4*10^4 Joules)
Explanation:
Q=mc∆T
where Q is energy in Joules.
Now m=250 g
c= 0.386 J/g°C
∆T = 99 - 22 = 77 °C
plugging the values in gives
Q=250*0.386*77=7430.5 Joules
(7.4*10^4 Joules, if 2 significant figures)
Which of the following properties can be used as evidence a chemical reaction has occurred? (Select all that apply)
a. Density change
b. Melting point change
c. odor change
d. Color change
Please help with this question!
Let’s say there are 2 planets similar in size, but one has much more mass. How will that affect the number of moons?
Answer:
0 because no value of mass at to be same
The hottest layer of the earth
Answer:
The inner cote layer is your answer.
Explanation:
BRAINLIEST FOR RIGHT ANSWERS PLS HELP
Complete the sentence. The lower the hydrogen ion concentration, the ______ the pH. answer choices
higher
lower
closer to 7
closer to 0
Answer:
Lower
Option B
Pls mark it as brainlist.
MARKING BRAINLIEST!!
Objective(s):
In your own words, what was the purpose of this lab?
Hypothesis:
In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.
If predators are increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
If pollution is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
If the amount of food available is increased, then the cricket frog population will (increase/decrease/stay the same) over the span of five years.
Procedure:
The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable), outcome variable (dependent variable), and control group for this experiment.
Reminder: The test variable is the item that is changing in this investigation. The outcome variable is the item that you are measuring in this investigation. The control group is the group in the experiment where the factors being tested are not applied. It allows scientists to set a baseline to compare the experimental groups that do have factors applied to them.
Test variable (independent variable):
Outcome variable (dependent variable):
Control group:
Data:
Record your data from each trial in the data chart below:
Type of Factor Beginning Frog Count Simulation 1 (Low) Simulation 2 (High)
Predators (alligators)
Pollution
Food (mosquitoes)
Graphs
Use the graphs you printed from the data chart in the virtual lab and analyze the data. Make a note of any trends that you discover.
Predators (alligators):
Pollution:
Food (mosquitoes):
Conclusion:
Your conclusion will include a summary and an interpretation of the lab results. Please write in complete sentences.
Which limiting factor(s) in this lab simulation are biotic?
Which limiting factor(s) in this lab simulation are abiotic?
Which limiting factor impacted the cricket frog population the most? Use evidence to support your answer.
Which limiting factor impacted the cricket frog population the least? Use evidence to support your answer.
Mosquitoes can carry and transmit disease to animals and humans. Explain how the cricket frog plays an important role in limiting the spread of mosquito-borne illnesses like West Nile virus and malaria.
Predict the long-term effects of these limiting factors on the cricket frog population in the pond ecosystem.
Answer:
IT CAN PROVIDE RESEARCH THAT CAN FIGHT THEORIES AND ARGUE OTHERS
HOPE THIS HELPS THIS IS MY FIRST ANSWER
(PLZ MARK ME BRAINLEST)
Who started the website "pintrest"
The atmosphere is full of nitrogen gas (N2). But plants cannot use nitrogen in this form. Summarize the roles of bacteria in making nitrogen available to plants and in returning nitrogen to the atmosphere.
They absorb nitrates from the soil into their roots. Then the nitrogen gets used in amino acids, nucleic acids, and chlorophyll. When a plant or animal dies, decomposers like fungi and bacteria turn the nitrogen back into ammonium so it can reenter the nitrogen cycle.
A sample of water is heated from 10 °C to 50 °C using 286 J of energy. What is the mass of water that was heated? help
Answer:
Mass of water == 1.71 g
Explanation:
Given data:
Initial temperature of water = 10°C
Final temperature of water = 50°C
Energy absorbed = 286 J
Mass of water = ?
Solution:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Specific heat capacity of water is 4.18 J/g.°C
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 50°C - 10°C
ΔT = 40°C
by putting values,
286 J = m × 4.18 J/g.°C × 40°C
286 J = m × 167.2 J/g
m = 286 J / 167.2 J/g
m = 1.71 g
_ Li₃N + _ NH₄NO₃ --> _ LiNO₃ + _ (NH₄)₃N
Can you balance the equation?
thank you!
Answer:
1 (=nothing), 3, 3, 1 (= nothing)
Explanation:
(nothing means you dont have to write anything down)
Answer:
1,3,3,1
Explanation:
Answer, please!!!!!!
Answer:
C. SOIL THAT IS A MIXTURE OF STILT AND CLAY
PLS MAKE ME BRAINLEST!
Please help asap!! How many groups did Mendeleev's original Periodic Table of Elements have?
A) 18
B) 5
C) 13
D) 8
Explain the energy transformations taking place in the diagram above. There are several.
the fire is evaporating the water
Answer:
chemical energy from the fire is turned into light and heat energy (thats all i can tell there is)
Explanation:
Please answer!!!!!!!!!!!!!
Answer:
B. Decreased humus
Explanation:
A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown.
How many atoms of each element are in one molecule of 2-heptanone?
F 4 carbon atoms, 11 hydrogen atoms, and 1 oxygen atom
G 7 carbon atoms, 14 hydrogen atoms, and 1 oxygen atom
H 7 carbon atoms, 11 hydrogen atoms, and 8 oxygen atoms
J 6 carbon atoms, 14 hydrogen atoms, and 3 oxygen atoms
Answer:
- 7 carbon atoms.
- 14 hydrogen atoms.
- 1 oxygen atom.
Explanation:
Hello,
In this case, for the given compound, heptanone, whose chemical formula is:
We can write the molecular formula showing the present atoms of each element:
In such a way we have:
- 7 carbon atoms.
- 14 hydrogen atoms.
- 1 oxygen atom.
Best regards.
ANSWER ASAP!!
In your own words name two types of acids and two types of bases. Describe how each are used..
Answer:
Acids sulfuric acid, hydrochloric acid. Bases ammonia water, sodium hydroxide.
Explanation:
Answer:
Acids sulfuric acid, hydrochloric acid. Bases ammonia water, sodium hydroxide.
Explanation: