A prospector pans for gold in a stream.
Which term best describes what is in his pan when he scoops up part of the stream bed?
mixture
pure substance
compound
element
Answers
Answer:
Mixture
Explanation:
When a prospector scoops up part of the stream bed, the pan contains stream sediments.
The term that best describes what is in his pan when he scoops up part of the stream bed is the mixture. Thus, the correct option for this question is A.
What is a Stream bed?A stream bed may be defined as the strait extremity of a stream or river through which the physical confine of the normal water flow. It is a type of channel significantly occupied by a stream.
According to the context of this question, when a prospector scoops up part of the stream bed, the pan contains stream sediments, which implies that the mixture contains stream sediments or contamination.
Therefore, the mixture is the term that best describes what is in his pan when he scoops up part of the stream bed. Thus, the correct option for this question is A.
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Related Questions
2a. Write down the names of the new substances formed when each of the following substance reacts with dilute hydrochloric acid.
i) Ammonia
ii) Sodium hydroxide
iii) Calcium carbonate
Answers
Chemical reactions must consists of reactants and products.
What is a chemical reaction?A chemical reaction is said to occur when two or more substances interact and lead to the formation of a new substance. Another name for a chemical reaction is chemical change.
Now consider the reaction;
HCl(aq) + NH3(g) -----> NH4Cl(aq)
HCl(aq) + NaOH(aq) ----> NaCl(aq) + H2O(l)
CaCO3 + 2HCl(aq) -----> CaCl2(aq) + CO2(g) + H2O(l)
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1. the rate of change in an object's position over time is called what
2. the type of energy that is the sum of kinetic and potential energy at any given time is what
3. A push Or pull that can change the motion of an object (examples: magnetic force, frictional force. Please Help me this is due tomorrow
Answers
Answer: 1 . velocity 2. total mechanical energy. 3. magnetic force
Answer:
1. Rise over run, slope, or velocity
2. Mechanical Energy
3. Temperature
It is a broad question
for the following we are using a 75 kg miniature pony.
a.) what is the mass of the pony on earth?
b.) what is the weight of the pony on earth?
c.) what is the mass of the pony on jupiter where gravity is 24.8 m/s^2?
d.) what is the weight of the pony on jupiter?
pls help me
Answers
Match the term to its definition (Lessons 6.03, 6.04 and 6.05)
(i can't fit this all without confusion)
Answers
Answer: the first paragraph is rain forest biome and the 2nd one is arctic tundra biome and finally the last paragraph is ocean or marine biome
Explanation:
rain forests have warm temperatures and include alot of animals and plants , artctic tundra biome includes cold temperatures ice stuff and all that and ocean or marine biome is pretty much just the ocean with seals , whales and marine life yk.
WHOEVER ANSWERS FIRST GETS BRAINLIST
Answers
Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex
Answers
Answer:
The answer is C.
Explanation:
Please give brainliest
Answer:
D
Explanation:
complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.
True or False: Organic substances are always made from the same four elements including carbon, hydrogen, oxygen, and nitrogen.
FALSE
TRUE
Answers
Answer:
Four elements, hydrogen, carbon, oxygen and nitrogen, are the major components of most organic compounds.Answer:
true
Explanation:
Which type of selection is shown in the graph above?
A. Disruptive selection
B. Stabilizing selection
C. Disaster Selection
D. Directional selection
Answers
In the given graph, the Evolved Population is showing disruptive selection. Hence, the correct option is A. Disruptive selection.
Stabilizing selection is a form of natural selection where individuals with average phenotypes are more likely to survive and reproduce their number. In this selection, the population tends to maintain a stable phenotype. As shown in the graph, the population is maximum for the population having a moderate length of neck.
Disruptive selection is a type of natural selection where extreme phenotypes are preferred over average phenotypes, leading to an increase in genetic variation and the population becoming more diverse. In this type of selection, the population diverges into two or more distinct phenotypic groups. As shown in the graph, two ranges of the population are favored for having traits for extreme lengths of the neck.
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What kind of rocks would you expect to see on Mars? What evidence supports your response?
Answers
Is this statement true or false?
The size and color of an object effects how it moves.
TRUE
FALSE
Answers
Answer:
True
Explanation:
The size of an objects effects how it moves
If the size is large the object moves slowly
And if the size is small the object move fastly
The energy from sunlight splits the water molecules into ____________ and _________ gas.
a. chlorophyll, oxygen
b. chlorophyll, hydrogen
c. hydrogen, oxygen
d. oxygen, carbon dioxide
Answers
Answer:
I hope this is correct...
Explanation:
I think the answer is
C. Hydrogen, Oxygen
Hope this helps :)
When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.
Answers
Answer:
Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.
Table B: Calculation of Kinetic Energy (KE)
Table B: Calculation of Kinetic Energy (KE)
Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500
To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.
For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2
Perform similar calculations for the other velocities and record the results in Table B.
Answer:
Explanation:mass of the bottle in each case is M = 0.250 kg
now as per given speeds we can use the formula of kinetic energy to find it
1) when speed is 2 m/s
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
questions in picture
Answers
The gas laws have been applied to find the missing values;
1) 1.72 atm
2) 880 K
3) 1.13 atm
4) 5.9 L
5) 167.4 kPa
What is the Charles law?The Charles, Boyle's and Gay - Lussac's laws are applied here.
We know that;
From Gay Lussa law
\(P_{1}\)/\(T_{1}\) = \(P_{2}\)/\(T_{2}\)
\(P_{2}\) = 1.21 * 450/315
\(P_{2}\) = 1.72 atm
From Charles's law
\(V_{1}\)/\(T_{1}\) = \(V_{2}\)/\(T_{2}\)
\(T_{2}\) = 4.8 * 495/2.7
\(T_{2}\)= 880 k
From Boyle's law
\(P_{1}\)\(V_{1}\)= \(P_{2}\)\(V_{2}\)
\(P_{2}\) = 7.14 * 1.9/12.0
\(P_{2}\) = 1.13 atm
From the general gas law;
\(V_{2}\) = 2.1 * 6.9 * 291/1.8 * 400
\(V_{2}\) = 4216.59/720
\(V_{2}\) = 5.9 L
From Gay Lussa law
\(P_{1}\)/\(T_{1}\) = \(P_{2}\)/\(T_{2}\)
\(P_{2}\) = 315.2 * 145/273
= 167.4 kPa
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2. When the child is pushed in the toy car, he increases speed. Does he accelerate as he is being pushed?
Answers
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
What is it called when to atoms combine?
Answers
The Sun is important in many ways. What is the purpose of the Sun in the food chain? *
Answers
Answer:
Most things, if not all, are dependent on the Sun. The Sun causes things to grow, which causes animals to thrive, which causes other animals to thrive, which causes a balanced ecosystem, meaning a balanced food chain.
Explanation:
In 3-5 sentences, explain the role of the digestive system in animals, as well as how the system works.
Answers
Answer:
Function. The primary functions of the GI tract include prehension of food and water; mastication, salivation, and swallowing of food; digestion of food and absorption of nutrients; maintenance of fluid and electrolyte balance; and evacuation of waste products
hope it helps
The process of digestion of food in animals or ruminants is known as ruminations. The process includes chewing of food, swallowing, digestion, absorption, and evacuation of food.
The role of the digestive system in animals?Ruminants are mammals that eat plants. They have 4 chambered stomachs that help digest food. the process of digestion is through the extract of nutrition from the food they consume.
The process includes prehension of food and water; mastication, salivation, and swallowing of food; digestion of food and absorption of nutrients; maintenance of fluid and electrolyte balance; and evacuation of waste products.
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how can you determine if the information you are reading is based on science or not?
Answers
Can NiF2 react with K to produce KF and Ni? Why or why not? Question 3 options: A) No, because Ni and K have lower activity than F B) Yes, because K has higher activity than Ni C) Yes, because K has lower activity than Ni D) No, because F and Ni have the same activity
Answers
Answer:
The correct option is;
B) Yes, because K has higher activity than Ni
Explanation:
The chemical equation for the reaction is as follows;
NiF₂ + K → 2KF + Ni
Based on chemical reactivity of the metals nickel and potassium involved in the reaction, we have;
On the activity series, potassium is higher up and therefore more reactive than nickel such that it can displace hydrogen from cold water while hydrogen will be evolved from only an acid in the case of nickel
Hence, the potassium will be able to replace Ni in the NiF₂ compound due to its higher reactivity such that we have;
2k (s) + Ni⁺² (aq) → 2k⁺ + Ni (s)
Answer:
Yes, because K has higher activity than Ni
Explanation:
Organize it fossil
If somebody knows the answer please tell me
Answers
Answer:Carbon-14 dating is second column tho
Explanation:So i remember doing this in 5th grade at my school so if u send me ur email i. can try send you my labs i hate doing them.
SUPPLEMENTARY QUESTION
1. Calculate the amount of heat (in calories) absorbed when 50 g of water at 20°C spreads over your skin and
warms to body temperature, 370C?
Answers
Answer:
850 Calories.
Explanation:
The following data were obtained from the question:
Mass (M) = 50 g
Initial temperature (T1) = 20 °C
Final temperature (T2) = 37 °C
Specific heat capacity (C) of water = 1 cal/g°C
Heat absorbed (Q) =..?
Next, we shall determine the change in temperature of water.
This can be obtained as follow:
Initial temperature (T1) = 20 °C
Final temperature (T2) = 37 °C
Change in temperature (ΔT) =..?
Change in temperature (ΔT) = T2 – T1
Change in temperature (ΔT) = 37 – 20
Change in temperature (ΔT) = 17 °C
Finally, we shall determine the heat absorbed. This can be obtained as follow:
Mass (M) = 50 g
Specific heat capacity (C) of water = 1 cal/g°C.
Change in temperature (ΔT) = 17 °C
Heat absorbed (Q) =..?
Q = MCΔT
Q = 50 x 1 x 17
Q = 850 Calories
Therefore, the heat absorbed is 850 Calories.
help me i confused............
Answers
Second: Test or modify
Third: Ask a question
Fourth: Make observations
Fifth: Analyze the results and make a conclusion
Answer:1»3
Explanation:
im just here for points tbh
HELP ME FAST (I WILL MARK BARINLIEST IF CORRECT)
Answers
Answer: the reason why the balance increases is because it is heavier so that's why it increases more
Explanation: the definition for balance is the ability to move or to remain in a position without losing control or falling. : a state in which different things occur in equal or proper amounts or have an equal or proper amount of importance.
Mass is the amount of matter something is made from. Big things are generally more massive than small ones. If you have a lump of iron or copper and take it to different places on Earth (or even the Moon) to measure it's mass, you'll always get the same result.
Weight is a measurement of how much the force of gravity acts on a given amount of mass. The force of gravity varies slightly all over Earth so, while your lump of iron has the same mass, its weight varies: it might weigh a little bit more in Bangladesh than it does in Tibet. What about on the Moon? Gravity is about one sixth the strength on the Moon as it is on Earth. So things weigh only one sixth as much on the Moon as they do on Earth, even though their mass is exactly the same in both places. Why are things heavier on Earth? Essentially because Earth is so much more massive than the Moon. It attracts objects with more force—and that gives them more weight.
hope this helps you!!!!!!!!!!!!!!!!!
Hope this helps
please help
50 point k
Answers
Answer:
1) A astronomer
2) A biomedical engineer
3) A biologist
4) A zoologist
5) A ecologist
6) A ornithologist
7) A hematologist
8) A lepidopterist
9) A taxonomist
10) A paleontologist
11) A seismologist
12) A chemist
13) A ichthyologist
14) A entomologist
15) A Mammalogist
16) A microbiologist
17) A mineralogist
18) A Physicist
19) A parasitologist
20) A mycologist
21) A botanist
22) A Geophysicist
23) A herpetologist
24) A geologist
25) A Audiologist
26) A meteorologist
27) An environmentalist
28) A marine biologist
29) An oceanographer
30) A archaeologist
31) A virologist
32) A Volcanologist
33) A hydrologist
34) A cell biologist
Hope this helps:)
Answer:
1) A astronomer
2) A biomedical engineer
3) A biologist
4) A zoologist
5) A ecologist
6) A ornithologist
7) A hematologist
8) A lepidopterist
9) A taxonomist
10) A paleontologist
11) A seismologist
12) A chemist
13) A ichthyologist
14) A entomologist
15) A Mammalogist
16) A microbiologist
17) A mineralogist
18) A Physicist
19) A parasitologist
20) A mycologist
21) A botanist
22) A Geophysicist
23) A herpetologist
24) A geologist
25) A Audiologist
26) A meteorologist
27) An environmentalist
28) A marine biologist
29) An oceanographer
30) A archaeologist
31) A virologist
32) A Volcanologist
33) A hydrologist
34) A cell biologist
Explanation:
What happens to air pressure and amount of oxygen as the altitude increases in Earth's atmosphere? 1. Air pressure decreases, while the amount of oxygen increases. 2. Both air pressure and the amount of oxygen increase. 3. Air pressure increases, while the oxygen decreases. 4. Both air and oxygen decrease.
Answers
Answer:
As altitude increases in Earth's atmosphere, both air pressure and the amount of oxygen decrease.
At sea level, the air pressure is about 1013.25 millibars (mb) and the concentration of oxygen is about 21%. As you go higher in the atmosphere, the air becomes thinner and less dense, so the air pressure decreases. At the same time, the concentration of oxygen also decreases because there is less air overall to contain oxygen molecules.
This is why it is harder to breathe at high altitudes, such as on a mountain. The air is less dense, so there are fewer oxygen molecules per breath and the body has to work harder to get enough oxygen.
Answer:4: Both Air and Oxygen decrease.
Explanation:This is in accordance with Henry's law. As pressure decreases solubility of gases decreases. Air pressure decreases as we altitude increases and the decrease in oxygen level is the consequence ,
A dog is exposed to radiation and it caused damage to a cell’s DNA. This genetic change results in the controls on mitosis not working. Which one of the following is most likely to occur after this damage?
Responses
An infection in the blood spreads results in sepsis ,
A blood clot stops oxygen to the heart, causing a heart attack,
Cells produce new versions of a virus to allow it to spread throughout the body
The cell dividing rapidly and creating a cancerous tumor
Answers
I suppose the last option to be correct.
Answer:
The cell dividing rapidly and creating a cancerous tumor
Explanation:
Please help, I don't get what does this means
3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate:
Answers
Answer: hydrogen-carbonate.
Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.
I hope everyone finds this helpful
Help me solve this asap please
Answers
Answer:
I can barely see the pic ????
Answer:
quality of the pic is too blurred to answer anything, I really wish I could help though!
Explanation:
how did alexa canadys accomplishment impact the general public
Answers
Answer:
She was the first female African American to be certified by the American Board of Neurological Surgery.
Explanation:
She became the first female African American can to be certified.