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natita [175]
3 years ago
9

Charlie lifts a box with a force of 500 N and sets it on a table top 1.2 m above its starting position. Lauren pushes an identic

al box up a 5 m ramp from the floor to the top of the same table. Which person did more work? Please explain.
Biology
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

Explanation:

Workdone is the force applied to move a body in a specified direction.  

  Work done  = Force x distance

For first box;

          Work done  = 500 x 1.2  = 600J

For the second box = 500 x 5  = 2500J

Lauren did more work compared to Charlie because he move the box through a larger height which is the distance in this scenario.

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Thermal energy is the
KIM [24]

Answer:

Thermal energy also known as “heat energy” comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature.

Explanation:

3 0
4 years ago
Eutrophication is caused by _______. a. an increase in nutrients b. a decrease in nutrients c. the introduction of new species o
lord [1]

Answer:

A. An increase in nutrients

Explanation:

By definition, eutrophication is excessive richness of nutrients in a lake or body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.

8 0
2 years ago
In a population with two alleles, B and b, the allele frequency of B=0.59. What would be the frequency of the heterozygotes if t
Levart [38]

Answer:

0.483

Explanation:

The given population is in Hardy-Weinberg equilibrium. If the gene has two alleles, the sum total of the frequencies of these two alleles will be one.  

Therefore, the total of the frequency of allele B and frequency of allele b will be 1. f(B) + f(b)=1

If the frequency of allele "B" is 0.59, then the frequency of allele "b" will be=1-0.59= 0.41

The frequency of heterozygous genotype in the population= 2pq

p= frequency of the dominant allele

q= frequency of the recessive allele

So, 2pq= 2 x 0.59 x 0.41 = 0.483

6 0
3 years ago
What is another term for the hot springs found on the ocean floor?
Dmitry_Shevchenko [17]
I think it's hydrothermal vents? hope its right because I have short term memory loss.
6 0
3 years ago
Read 2 more answers
1. John observed bacteria at 100X under the oil immersion and then decided to go back to 40X
weeeeeb [17]

Answer:

The observed image will not be sharp

Explanation:

When 100x microscope objective lens is being used, light refraction in the air is enough high to produce image alterations. Image distortions can be minimized by immersion oil because this liquid has a higher refractive index than air. However, light refraction is not usually noticeable when using 4x, 10x and 40x objective lenses. Moreover, this image will not be sharp after putting oil on the slide and going back to the 40x objective, it is for that reason that the 40x is called 'high dry' lens. In consequence, it is required to clean the immersion oil off the 40x objective. In general, it is required to  to remove the oil and refocus off the slide and lens immediately after oil immersion (it can be done by using an oil-soluble solvent).

6 0
3 years ago
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