Suppose a scientists found a new metal like substance in the dessert. He determined its mass to be 20 grams. The volume was determined by water displacement to be 5 cm3. What is the density of the substance? Will it sink or float in liquid water (1g/cm3)?

QUESTION POSTED AT 26/03/2020 - 10:18 PM

Related questions

The length of a planet’s day is determined by its

Im pretty sure it depends on how fast or slow it rotates... sorry if im wrong

ANSWERED AT 30/03/2020 - 01:35 AM


QUESTION POSTED AT 30/03/2020 - 01:35 AM

The amount of mass in a particular volume of water is _____. A. salinity B. density C. pressure D. temperature

I think the answer is b if you are smart you will go with b because the rest of the answer make zero sense.

ANSWERED AT 29/03/2020 - 06:27 PM


QUESTION POSTED AT 29/03/2020 - 06:27 PM

How can reduced precipitation lead to limited water availability

Answer:

        Let's think in Brazil as an example to answer this question, and the Amazon forest.

Explanation:

        The amazon forest is one of the biggest forests of the whole world, being responsible for a lot of the water distribution there is in Brazil due to a process called flying river. The water vapor that the trees in amazon produce is very high, we can check on that by seeing how the weather in this region works, it rains almost all the time, and then, this vapor water spreads across all the country and other countries too. If there's a problem in amazon such as fires and deforestation, the amount of water that is going to other regions of the country is less than before, and in that way, the water availability will not be enough anymore.

ANSWERED AT 29/03/2020 - 06:14 PM


QUESTION POSTED AT 29/03/2020 - 06:14 PM

Jesse finds a burned-looking rock outside near a small crater. What has she most likely found? a comet an asteroid a meteor a meteorite

Answer:

Meteorite

Explanation:

(Its comet not comment) And I got it wrong on my test this is the correct answer. :)

ANSWERED AT 29/03/2020 - 04:32 PM


QUESTION POSTED AT 29/03/2020 - 04:32 PM

Study the image of a fossil below. How might a scientist use this fossil to learn more about the history of life on Earth?

The fossil shows evidence of how animals lived on Earth in the past and shows history about animals that may be extinct now or have evolved since then, which would show development in the animal in the fossil.

ANSWERED AT 29/03/2020 - 04:29 PM


QUESTION POSTED AT 29/03/2020 - 04:29 PM

Consider this northern site of primary succession following the retreat of a glacier. As we move from left to right, describe some improvements in the abiotic factors that support plant growth. A) change in climate over time B) less competition for water resources due to biodiversity C) improved soil quality: increased humus and water retention D) increased population density resulting in decreased pathogens

Answer: C. improved soil quality: increased humus and water retention.

Explanation:

An ecological succession brings change in the type of living species residing in an ecosystem with respect to changes that occur in the abiotic (non-living factors) with respect to time.

A region affected by a retreating glacier will not be suitable for the growth of living species. The soil may be lacking minerals and will be in the permafrost condition. So for the initiation of succession the improvement in soil an important abiotic factor is required. The improved soil quality will allow the accumulation of organic and inorganic minerals by physical and biological processes. This will help in formation of humus and water retention.

ANSWERED AT 28/03/2020 - 12:55 PM


QUESTION POSTED AT 28/03/2020 - 12:55 PM

What might happen if your body couldn't process glucose? A. You wouldn't be able to digest food B. You wouldn't have the energy you needed to function C. You would be more likely to catch diseases Or D. You would be constantly thirsty for water

B. you wouldn't have the energy to function
because glucose is a simple sugar that is an important energy source in living organisms

ANSWERED AT 28/03/2020 - 12:40 PM


QUESTION POSTED AT 28/03/2020 - 12:40 PM

A scientist wrote an article about a drug that he believes reduces the effects of viral infections. Which of these MOST LIKELY needs to be done by a scientific committee before the drug is made available to the general public? A) An experiment related to the drug but not about viral infections B) A review of the scientist’s credentials and a review of the article C) An experiment not related to the drug but about viral infections in general D) An experiment related to the drug and a review of the article written by the scientist

Answer:

The answer is d)An experiment related to the drug and a review of the article written by the scientist

Explanation:

A scientific committee will verify that the medication has been evaluated in its entirety before placing it at the disposal of the general public, and for this it should be verified that said medication is supported through scientific experimentation, which will help establish the nature between independent variables and dependents. In a controlled study of a drug, scientists conduct two or more experiments simultaneously: a treatment group, where the effect of manipulation on a dependent variable is analyzed, and a control group, in which the same conditions are used, to treatment exception.

ANSWERED AT 28/03/2020 - 12:28 PM


QUESTION POSTED AT 28/03/2020 - 12:28 PM

Which would be the best tools to measure the density of a small piece of silver ore

The best tools to measure the density of a small piece of silver ore is to use a graduated cylinder and a balance.

ANSWERED AT 28/03/2020 - 12:18 PM


QUESTION POSTED AT 28/03/2020 - 12:18 PM

Are individual amino acids likely to be found in the mouth? Explain.

Yes because in our saliva are enzymes that break down the food we eat.

ANSWERED AT 28/03/2020 - 12:16 PM


QUESTION POSTED AT 28/03/2020 - 12:16 PM

In a paragraph address these following questions: • How does an underwater earthquake cause a tsunami? • Why do some earthquakes cause more damage than others? the paragraph needs to also include the following things: • discuss how the different types of waves are formed and describe how the waves travel • explain how scientists use waves to track and analyze earthquakes • cover recent events involving earthquakes and/or tsunamis that illustrate the points made in your explanation

What is an Earthquake

Earthquakes are vibrations in the earth's crust They occur along all plate boundaries but are more destructive usually at destructive plate boundaries

How are they measured

The magnitude or size of an earthquake can be measured by an instrument called a seisometer and are shown on a seismograph. The earthquakes are measured on the Richter scale from a value of 1 to 10. Each level of magnitude is 10 times more powerful than the previous. Therefore a level 7 is 100 time more powerful than a level 5.

Why do some earthquakes cause more damage than others?

Some earthquakes take place in rural areas where few people live and little is damaged

If they occur near large urban areas with many people, transport services, large buildings and services such as gas and electricity - there can be a great amount of deaths and damage

In Poor countries - LEDC's they have poorly built buildings, few emergency facilities, and the equipment to help rescue people - a good term to use is that they have a poor infrastructure.

In rich countries - MEDC's such as the USA they prepare for an earthquake with drills and have a great deal of trained emergency personnel and equipment to go to help the injured. They also try to build to withstand earthquake damage - ie The Transamerica building

The time of day can be important - If the earthquake hits when it is the rush hour or when there is a large number of people located in a certain area - this can cause a great loss of life

Obviously if they occur near to coasts then Tsunamis can cause a great deal of damage and deaths such as the 2004 Boxing Day Tsunami

ANSWERED AT 28/03/2020 - 12:00 PM


QUESTION POSTED AT 28/03/2020 - 12:00 PM

Which of the following are not characteristics of the cell wall? Select all that apply. cellulose and chitin hydrophillic and hydrophobic structures found in cells of fungi and algae double-layered membrane

Answer: hydrophobic and hydrophilic structures found in cells of fungi and algea

double-layered membrane

A cell wall is a a semi-permeable protective layer found in some cell types. This covers the cell membrane in plants cells, fungi, bacteria. Animal cells do not possess cell wall. The cell wall performs functions like protection, provides structural stability to a cell and support. Cell wall composition varies depending upon the type of organism. In plants the cell wall is made up of fibers of carbohydrate polymer called as cellulose. In bacteria cell walls are made up of peptidoglycan. In fungi cell wall is made up of chitin. Hydrophillic and hydrophobic structures found in cells of fungi and algae and double- layered membrane are features of cell membrane not of cell wall.          

ANSWERED AT 28/03/2020 - 11:48 AM


QUESTION POSTED AT 28/03/2020 - 11:48 AM

What are two ways water travels from land to enter the ocean

•rivers
•runoff
• delta

ANSWERED AT 28/03/2020 - 11:47 AM


QUESTION POSTED AT 28/03/2020 - 11:47 AM

What determines which plants to grow where?

The soil and sunlight

ANSWERED AT 28/03/2020 - 11:44 AM


QUESTION POSTED AT 28/03/2020 - 11:44 AM

Which of the following has not yet been proven but will add support to the Big Bang Theory if true? The universe is expanding Overall density of ordinary matter must be roughly 4% of critical density There is an abundance of the light elements H, He, Li There is a widespread cosmic microwave background radiation

Redshift shows that the universe is expanding, so that is already true.

I don't know anything about B

I'm pretty sure C is already true

And D has already been proven as fact.

I would go with B, but correct me if I'm wrong.

ANSWERED AT 28/03/2020 - 11:36 AM


QUESTION POSTED AT 28/03/2020 - 11:36 AM

Water changes from a liquid to a gas in the process of evaporation t or f? PLEASE HURRY!!!

I believe that's true

ANSWERED AT 28/03/2020 - 11:34 AM


QUESTION POSTED AT 28/03/2020 - 11:34 AM

What determines the similarity in anatomical features among organisms

Using the Classification of Living things as well as common knowledge about the Animal Kingdom, it depends on your religious beliefs due to the thought of evolution, adaptations, and natural elimination.  

ANSWERED AT 28/03/2020 - 11:33 AM


QUESTION POSTED AT 28/03/2020 - 11:33 AM

5) Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist.

It's either hydrogen or nitrogen

ANSWERED AT 28/03/2020 - 11:28 AM


QUESTION POSTED AT 28/03/2020 - 11:28 AM

Why do angiosperms not need water for fertilization

Answer:

The answer is c) a pollen tube grows from the pollen grain into the ovary.

Explanation:

I got it correct on the quiz

ANSWERED AT 28/03/2020 - 11:26 AM


QUESTION POSTED AT 28/03/2020 - 11:26 AM

Which law provides for the cleanup of toxic waste site in the united states A.soil and water conservation act B.cercla C. resource management act D.clean air act

Which law provides for the cleanup of toxic waste site in the united states A. soil and water conservation act.

ANSWERED AT 28/03/2020 - 11:25 AM


QUESTION POSTED AT 28/03/2020 - 11:25 AM

Which of these factors does CITES fail to consider when determining which species to cover? A. Species population B. Economic impact C. Analysis of trade D. Ecosystem sustainability

Option D, ecosystem sustainability, is the right answer.

"The Convention on International Trade in Endangered Species" is the full form of CITES. The CITES is a global agreement among nations. The main aim of CITES is to assure that global trade in parts of plants and wild animals does not endanger their survival. However, it failed to include ecosystem sustainability while determining which varieties to be covered.

ANSWERED AT 28/03/2020 - 11:24 AM


QUESTION POSTED AT 28/03/2020 - 11:24 AM

Match each step in the conversion of biomass into electricity with the appropriate number. For example, Step 1 represents the first step. 1. Step 1 steam turns a turbine 2. Step 2 water boils into steam 3. Step 3 turbine powers a generator 4. Step 4 biomass is burned 5. Step 5 generator produces electricity

Answer:

The transformation of biomass into electricity can take place via many methods. However, the most common one is the direct combustion of biomass substance like woody substances or agricultural waste. The other method, which helps in converting biomass to electricity is gasification of biomass. Let us consider the steps of biomass combustion:  

Step 1: The burning of biomass.  

Step 2: The generation of steam takes place due to the boiling of water.  

Step 3: The generated steam turns a turbine.  

Step 4: The generator is powered with the help of a turbine.  

Step 5: Electricity gets generated with the help of a generator.  

ANSWERED AT 28/03/2020 - 11:12 AM


QUESTION POSTED AT 28/03/2020 - 11:12 AM