In sequential test, there is typically a loss in specificity. a. True b. False

Jill's class is studying how rocks are formed. Jill's teacher showed them a picture of a type of rock. Then, Jill's teacher made

Veseljchak [2.6K]

The answer to your question would be (D) Sedimentary Rock.

5 0

3 years ago

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A denisty of a bottle weighs 0.25N when empty & 0.75N when filled with water & 0.65N when filled with alcohol. Calculate

Ulleksa [173]

Answer:

$0.05\times 10^{-3}\ \text{m}^3$

$800\ \text{kg/m}^3$

Explanation:

$W_b$ = Weight of bottle = 0.25 N

$W_w$ = Weight of water = $0.75-0.25=0.5\ \text{N}$

g = Acceleration due to gravity = $10\ \text{m/s}^2$

$\rho_w$ = Density of water = $1000\ \text{kg/m}^3$

Mass of water

$m_w=\dfrac{W_w}{g}\\\Rightarrow m_w=\dfrac{0.5}{10}\\\Rightarrow m_w=0.05\ \text{kg}$

Volume is given by

$V_w=\dfrac{m_w}{\rho_w}\\\Rightarrow V_w=\dfrac{0.05}{1000}\\\Rightarrow V_w=0.05\times 10^{-3}\ \text{m}^3$

Volume of the bottle is $0.05\times 10^{-3}\ \text{m}^3$ .

This means that the alcohol will take the same amount of volume.

$W_a$ = Weight of alcohol = $0.65-0.25=0.4\ \text{N}$

Mass of alcohol

$m_a=\dfrac{0.4}{10}\\\Rightarrow m_a=0.04\ \text{kg}$

Density is given by

$\rho=\dfrac{m_a}{V_w}\\\Rightarrow \rho=\dfrac{0.04}{0.05\times 10^{-3}}\\\Rightarrow \rho=800\ \text{kg/m}^3$

Density of alcohol is $800\ \text{kg/m}^3$

7 0

3 years ago

What is the role of natural selection in evolution?

Wittaler [7]

Answer:

The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.

Explanation:

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations. ... Variation exists within all populations of organisms.

5 0

4 years ago

Which of the following processes involves the chloroplast?a. cell divisionb. conversion of light energy to chemical energyc. for

tino4ka555 [31]

Answer:

$\boxed{\tt B. \ Conversion\ of\ light \ energy \ to \ chemical \ energy}$

Explanation:

This question asks us which process involves the chloroplast.

In plants, algae, and some bacteria, a process called photosynthesis occurs. This process takes place in the chloroplasts. In the process, the organism takes light energy from the sun, carbon dioxide, and water, and turns it into glucose and oxygen.

The glucose that is made becomes the food and energy for the organism. In another process, called cellular respiration, the sugar is turned into ATP, a kind of useable energy.

The best answer choice is B. Conversion of light energy to chemical energy. The chloroplasts convert light energy to sugar, and the sugar becomes chemical energy.

3 0

3 years ago

What is the phrase that pays for the Unit 2 test review

torisob [31]

So I know this probably doesn't help, but its not values. At least we ruled one out.

8 0

3 years ago