Greg wants to find out which shape of sail will make his model schooner sailboat go fast enough to win the race on Saturday. The wind is forecasted to be 10 -20 miles per hour on the day of the race. He builds a triangular shaped sail, a rhombic shaped sail, a circular shaped sail, and a rectangular shaped sail. The current sail on the boat is square in shape. Greg know he must use the same amount of surface area for each sail so he decides to use 100 square centimeters of canvas for each sail.
CategoryIndependent variable
CategoryDependent Variable
CategoryControl variable
Categoryconstant variables
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Related Questions
What is causing the increasing amount of CO2 in the atmosphere? What could be done about it?
Answers
What was the low temperature for hurricane Katrina?
Answers
Answer: 90 degrees F
Explanation:
Please help!
1.Ionic compounds are formed when.
-metal reacts with non metal
-metal reacts with metal
-when non-metal reacts with non-metal
2.True or false. Ionic bonds are electrostatic forces.
-True
-False
3.Sodium loses one electron when it reacts with.
-Magnesium
-potassium
-Chlorine
Answers
2- true
3- chlorine
2. true
3. chlorine
HELP PLS HURRY!
Aliyah and Jeremy constructed a flashlight in science class. They want to use it to help them see at night. The picture below looks like the circuit that they built when making their flashlight.
After constructing the circuit, Aliyah and Jeremy noticed that the light bulb stays on all the time. This means the batteries will get used up when the flashlight does not need to be on. What is something Aliyah and Jeremy can do to solve this problem?
A.
They could move the light bulb closer the battery.
B.
They could connect more batteries to the circuit.
C.
They could add a switch to the circuit.
D.
The could use longer wires.
Answers
Answer:
C
Explanation:
If they add a switch then the battery will not drain as fast.
Switches allow control over electric currents in a circuit without having to actually get in and cut the wires
HELP! 100 POINTS! A cinder block is pulled 0.50 meters to the right in 3 seconds. What is the block's average speed to the nearest hundredth of a meter per second (m/s)?
Answers
The average speed of the blocks are 0.36 m/S.
Explanation:
Average speed is defined as the ratio of distance covered per unit time. So if it is said that blocks are pulled to 0.9 m in the right side. This means the blocks cover a distance of 0.9 m from the origin and that distance is covered in 2.5 s. Thus, the average speed can be calculated from the change in speed
with respect to time. As at time t = 0, the speed is
also zero, and at time t = 2.5 s, the speed will be
Speed =
0.9 = 0.36
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
2.5
Since, in this case, the speed is equal to the average speed of blocks. So the average speed of the blocks will be 0.36 m/s.
What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
You are performing an
experiment in your lab. To
compare with other experiments
your results must be in moles.
During your final step you burn a
strip of magnesium (Mg), which
results in 187 grams of
magnesium oxide (MgO). How
should you enter your results?
PSP
O
A. 7.7 moles Mgo
B. 4.6 moles Mgo
C. 187 grams Mgo
D. 7536.1 moles Mgo
Resot Selection
Answers
Answer:
4.6 moles MgO
Explanation:
number of moles is equals to the mass in grams divided by RFM
RFM=16+24.3=40.3
187/40.3
=4.6 moles of MgO
During your final step you burn a strip of magnesium (Mg), which results in 187 grams of magnesium oxide (MgO) the results would be 4.6 moles Mgo. option B is correct.
What are moles?The value of one mole is given by Avogadro's number which is 2.303 × 10²³ moles but here the used weight is given so number of moles will be calculated with other formula.
A strip of magnesium (Mg), which results in 187 grams of magnesium oxide (MgO) number of moles will be,
n = W / M
where , n = number of moles
W = given weight
M = molar mass
substituting the values in equation,
n = 187 / 40.30
n = 4.6 moles
Therefore, final step you burn a strip of magnesium (Mg), which results in 187 grams of magnesium oxide (MgO) the results would be 4.6 moles Mgo. option B is correct.
Learn more about moles, here:
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Why is it so easy to see venus and so hard to see Neptune? Give two reasons
Answers
Answer:
Neptune is directly opposite the sun in Earth's sky
Explanation:
You need a telescope because its far away from earth and also the moon has phases so does the planets and now we have a full neptune.
What are the disadvantages of using a graph to communicate data? Select all that apply. data can be misrepresented not as precise as the data itself correlation between two variables could be false data can be lost on the graph
Answers
Answer:
The major disadvantage of using charts and graphs is that these aids may oversimplify data, which can provide a misleading view of the data. Attempting to correct this can make charts overly complex, which can make their value in aiding a presentation less useful.
Explanation:
hope it helps if did then mark me the briliantest
The disadvantages of using a graph to communicate data is data can be misrepresented, not as precise. Therefore, option A is correct.
What are the disadvantages of using a graph ?Disadvantages of using a graph include the need for further written or verbal explanation and the ease with which they can be misrepresented.
Charts have the potential to simplify the data, which might obscure some of its more challenging features. A chart is more aesthetically pleasing and more effective at highlighting the important parts of the data, since it emphasizes those features.
The cost of human labor and resources, the process of choosing the best graphical and tabular representation of data, the complexity of the visualizing data's design, and the possibility of human bias are the usual drawbacks of graphical representation of data.
Thus, option A is correct.
To learn more about the disadvantages of using a graph, follow the link;
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Select all of the following events in which a chemical change occurs.
A. Chocolate syrup dissolves into warm milk.
B. Toast is lightly charred in a toaster.
C. A piece of paper is cut up into 12 pieces.
D. Two unknown liquids are mixed together and a gas is produced.
E. Sugar is heated until it turns into a brown caramel sauce.
F. A sugar cube dissolves in coffee.
PLZ HURRY WILL MARK BRAINLIEST
Answers
Sugar dissolving is a physical change because no new substance is formed it’s just sugar particles broken down smaller.
The following events in which a chemical change occurs are B , D, E
What is a Chemical Change ?Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition .
Among the given changes
A. Chocolate syrup dissolves into warm milk. : Physical Change
B. Toast is lightly charred in a toaster. : Chemical Change
C. A piece of paper is cut up into 12 pieces. :Physical Change
D. Two unknown liquids are mixed together and a gas is produced.: Chemical Change
E. Sugar is heated until it turns into a brown caramel sauce.: Chemical Change
F. A sugar cube dissolves in coffee.: Physical Change
The following events in which a chemical change occurs are B , D, E
To know more about Chemical Change
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Which of the following statements fully describes what an object may do when it experiences unbalanced forces? Select the two best answers.
A. It may change directions.
B. It will move at a constant speed.
C. It may slow down.
D. It may slow down or speed up.
E. It will stay stationary.
Answers
Answer:b
Explanation:
Avanti works in a bookstore. She has four books and is going to place them in two stacks. The diagram above shows the books before they touch. Use the information in the diagram to answer the question. How did the temperatures of the four books compare before they touched? How will the temperatures of the two top books compare after the books have been touching for a while, and why?
Answers
Answer:
cocohggghehejieieieidiiriie
Explanation:
cocobhshsh
Answer:
Well they didn't transfer any energy when they weren't touching and it didn't produce any energy if it didn't move. Since they are on top of each other they are causing momentum on each other creating kinetic energy.
Explanation:
Hoping this help
If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?
Answers
Where does most fresh water exist?
Answers
Answer:
aquifers, ice caps, and glaciers I think
(C) aquifers, ice caps and glaciers
piece of roasted salted fish is put in a mouse trap. explainwhy the mouse comes to the trap
Answers
Answer: Food
Explanation:
The rat smells the food or sees the food it goes towards the food to eat it.
How can the rate of a reaction be decreased?
Responses
A: having more surface area
B: lowering the amount of reactants
C: adding a catalyst
D: raising the temperature
Answers
HEEEELP!!! THIS IS DUE TODAY
What is one of the most important forms of energy? Give two examples of how this type of energy is used in our lives.
Answers
Refrigeration used electrical energy.
Answer:
"There is no God but Allah, and Muhammad is his messenger." This is the basic statement of the Islamic faith: anyone who cannot recite this wholeheartedly is not a Muslim. When a Muslim recites this they proclaim: That Allah is the only God, and that Muhammad is his prophet.
I hope u find the right path
Explanation:
Match these items.
1. imprint of plant or animal
original-remains fossil
2. undecayed plant or animal part
carbonized fossil
3. replaced by a mineral
petrified fossil
4. only carbon remains
cleavage
5. mountain
geology
6. from magma
metamorphic
7. from physical and chemical changes
igneous
8. sandstone
print fossil
9. helps identify rocks
landform
10. science of Earth
sedimentary
Answers
1. print fossil
2. carbonized fossil
3. petrified fossil
4. cleavage
5. landform
6. igneous
7. metamorphic
8. print fossil
9. geology
10. sedimentary
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The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.
Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.
Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.
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Which of the following would occur if the Thrush population was to suddenly decrease?
a
The population of Eagles would increase
b
The population of Eagles would decrease
c
The population of Dragonfly would decrease
d
The population of corn would increase
Answers
Reasoning: Since Eagles directly eat Thrush, their populations would decrease.
The other answers are wrong because with the first choice, Eagles would not increase in population if one of their food sources were removed. For the third choice, Dragonflies wouldn’t increase. Since Thrush eat Dragonflies, the disappearance of Thrush wouldn’t hurt the population of Dragonflies. Lastly, The last option is wrong because corn isn’t reliant on animals to survive. If Thrush disappear, corn will not be affected. This leaves B. to be the answer.
H2O is an example of what formula?
Answers
____________ limits or stops the growth of bacteria.
Antibiotics
Antibiotics
Chemicals
Chemicals
Photosynthesis
Photosynthesis
Vaccines
Answers
Answer:
Vaccines
Explanation:
Explanation: I had this question and got it right
Please help me por favor :'(
Answers
please help me 7th grade science
When a chemical reaction occurs, what happens to the atoms of the two substances? Provide an example from the Sim (on Amplify) as evidence to support your answer.
When a chemical reaction does not occur, what happens to the atoms of the two substances? Provide an example from Sim as evidence to support your answer.
Answers
An example of this can be seen in the Sim on Amplify, where students can experiment with different chemical reactions. For instance, in the "Chemical Reactions" Sim, students can explore the reaction between iron and sulfur to form iron sulfide. In this reaction, the iron atoms and sulfur atoms combine to form a new compound, iron sulfide, with different properties than the original iron and sulfur. The atoms of the iron and sulfur are rearranged to form new bonds, resulting in the formation of a new substance. This is an example of a chemical reaction, where the atoms of the two substances are rearranged to form a new compound with different properties.
Answer:
Explanation:A chemical response is a chemical transformation in which two chemicals combine to create a third component.
(i) Adding diluted acid to an active metal causes the test tube to heat up and hydrogen gas to escape, which results in the production of heat.
(ii) When diluted hydrochloric acid is added to silver nitrate, AgCl, a white precipitate, results.
(iii) When water is added to quicklime, the mixture boils and produces heat along with a hissing sound.
(iv) Thermal breakdown of mercury oxide - Mercury turns from red to a metallic silver tint as a result of this process.
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
Which feature forms when magma cools beneath Earth's surface?
Geysers
Calderas
Batholiths
Vents
Note- Meant to put it for Geography my bad
Answers
Lab: Thermal Energy Transfer
Answers
Answer:
Thermal energy transfers occur in three ways: through conduction, convection, and radiation. When thermal energy is transferred between neighboring molecules that are in contact with one another, this is called conduction.
Do magnets work underwater? How about in space? Explain your reasoning.
Answers
Answer:magnets work underwater the same as they do in air or in a vacuum.
Explanation : Water is almost completely non-magnetic, so magnets work underwater the same as they do in air or in a vacuum.
What type of person studies and collects data on the weather?
Answers
Concentration is the amount of a substance in a given volume.
True or False
Answers
Answer:
True?
Explanation:
Answer:
i think its true but im not to sure
Explanation:
The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.
An oval shape, which may be elongated or nearly circular; the shape of the planet’s orbits.
Answers
Answer:
The statement that you typed is mostly correct
Explanation: