1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
podryga [215]
2 years ago
10

World class speed skaters can skate a 3,000-m course in about 4 minutes. What is their average speed for this course.

Biology
1 answer:
Semenov [28]2 years ago
5 0

A. 12.5 m/s.

The average speed is defined as the relationship between the displacement made by a body and the total time it took to perform it.

The formula that will allow you to calculate the average speed is:

v = d/t, where d is the traveled distance and t the time it took to travel the distance.

We hace to convert 4 minutes to second:

(60 s/1 min)*(4 min) = 240 s

So, the average speed is:

v = 3000 m/240 s

v = 12.5 m/s  

You might be interested in
Why is it Important that cell membrane contain openings into cell ?
Ira Lisetskai [31]

Answer:

Embedded in the lipid bilayer are large proteins, many of which transport ions and water-soluble molecules across the membrane. Some proteins in the plasma membrane form open pores, called membrane channels, which allow the free diffusion of ions into and out of the cell.

6 0
3 years ago
Zebra mussels are tiny clam-like organisms that strain plankton out of the lake water. They attach to piers, boat hulls, pipes,
-Dominant- [34]
<h2>Availability of Plankton</h2>

Explanation:

  • The term plankton comes from the Greek derivative planktos, meaning wandering. Organisms in this group spend either part or all of their life in a drifting state, with no ability to swim against a current. Most have little or no ability to swim at all. Though some are larger, most planktonic creatures are microscopic and make up the bottom of the food chain in aquatic environments
  • Plankton can be divided into two categories: phytoplankton are those organisms that are plant-like, and zooplankton are organisms that are animal-like. Interestingly enough, many planktonic species are neither plant nor animal but are creatures that belong to the kingdom Protista
  • Zebra muscles are found in water bodies which attached to pipes and other surfaces of water supply to impliment the availability of plankton

5 0
2 years ago
Which parental responsibilities would be the most interesting to you? why?
gavmur [86]
Parents have many responsibilities to their children, these responsibility must be taken seriously in order to keep the children in the right path. The parental responsibility that I will personally found very interesting is teaching my children how to do different stuffs. Like teaching them cook different dishes and cookies or teaching them to play different games or teaching them funny tricks in mathematics.
7 0
3 years ago
The data table above includes the distance each planet is from the sun. Students in an Earth science class were asked to explain
Serga [27]

Student 4

Explanation:

  • The sun has less gravitational pull on Neptune because it is farther away. Gravity is the force by which a planet or other body draws objects towards its center.
  • Gravity keeps all the planets in its position and allows it to move in its orbit.
  • The force of gravity is inversely proportional to the distance between two objects.
  • So when the distance increases, the force weakens. Since Neptune approximately 4.8 billion kilometers away from the sun, its gravitational force is very less.
5 0
2 years ago
|
Verizon [17]

Cellulose makes the cell walls of all plant cells.

Option B

<h3><u>Explanation:</u></h3>

Enzymes are biomolecules that act as biocatalysts and to enhance the rate of a chemical reaction. Lipids and proteins make up the cell membrane bilayer. Cholesterol is a lipid molecule that comes under the category of very low density lipoprotein. Its not associated with storing the genetic information. The DNA stores the genetic information.

Glucose is the chief respiratory substrate of a cell. Its not associated with the increase in rate of a reaction. But cellulose is the molecule that is a polymer of glucose that is associated with the formation of cell walls in plants.

5 0
2 years ago
Other questions:
  • A plant shows incomplete dominance in flower color. Red flowers are homozygous dominant, white flowers are homozygous recessive,
    9·2 answers
  • Jill is 5 years old. She has been diagnosed with ADHD and shows signs of learning disabilities. Her doctor suggests that Jill's
    11·1 answer
  • Consider the stage of cellular respiration that is shown in the diagram. mc001-1.jpg What is the net ATP production at this stag
    13·2 answers
  • In which part of the body is glycogen stored?
    6·2 answers
  • The structure identified in the image above is called the
    10·2 answers
  • The c-terminal domain of rna polymerase ii projects away from the globular portion of the protein. why?
    5·1 answer
  • What would be the complementary sequence: CCGTCATC
    5·1 answer
  • Support an argument that the gravitational force exerted by Earth on objects is directed down.
    13·2 answers
  • What system provide the reactant for circular respiration​
    15·1 answer
  • Where did DDT come from?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!