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
Black_prince [1.1K]
3 years ago
7

Find the kinetic energy of a ball of mass 200 grams moving at a speed of 20m/s​

Biology
2 answers:
Gelneren [198K]3 years ago
4 0
We have a mass of 200g (0.2kg) moving at 20m/s

Kinetic Energy KE = ½ mv^2 where m is mass and v is velocity

Actually, v is a vector quantity, so KE = ½ mv•v

The dot product of 2 vectors a and b is abCosθ where θ is the angle between the vectors.

Obviously v•v = v^2 Cos0 = v^2

In this case, we have KE = ½ (0.2)(20^2) = 40kg-m^2/s^2 = 40J

So we have kinetic energy in the amount of 40 Joules.
Scorpion4ik [409]3 years ago
3 0

Answer is 40J...............

You might be interested in
DNA<br>"Deoxyribonucleic<br>Acid"​
Zarrin [17]

Answer:

Details about DNA are given in the explanation section. Hope it will be helpful for you.

Explanation:

DNA, or deoxyribonucleic acid, is the hereditary element in humans and almost all other organisms. Nearly every cell in a person’s body has the same type of DNA. Most DNA is found in the cell nucleus (nuclear DNA), but a small quantity of DNA can also be found in the mitochondria (mitochondrial DNA or mtDNA).

The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same type in all people.

DNA bases pair up with each other, A with T and C with G, to form units that are called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule.  A base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a double helix.

A valuable feature of DNA is that it can replicate, or make copies of itself. Each strand of DNA in the double helix can serve as a pattern for duplicating the sequence of bases.

7 0
3 years ago
Lincoln says the "insurgents" wanted to fight. Why?
Artist 52 [7]
President Lincoln said the "insurgents" wanted to fight because they wanted to extend and perpetuate slavery. At the end of the Civil War, the "insurgents" did not get their wish. The correct answer is B.
4 0
3 years ago
In which part of the body is glycogen stored?
zalisa [80]

Glycogen stored mainly in the liver


I hope that's help !

4 0
3 years ago
Read 2 more answers
What is an atomic nucleus​
Airida [17]

Answer:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom

Explanation:

3 0
3 years ago
Read 2 more answers
What are red blood cells and what do they do?
Verdich [7]
Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow. They typically live for about 120 days, and then they die.
4 0
3 years ago
Read 2 more answers
Other questions:
  • State one possible reason why a gene for the production of a human hormones would be placed in bacterial DNA
    12·1 answer
  • What is the ocean feature identified in the illustration?
    5·2 answers
  • In an electron cloud, an electron that is farther away from the nucleus has?
    10·2 answers
  • A student examines a sample of pond water under a microscope and observes a single-celled heterotrophic eukaryote swimming throu
    10·1 answer
  • How accurate is DNA and fingerprint technology, and when did it emerge? What level of human error still plays a role in this typ
    6·1 answer
  • Which organism would be the best subject for a study of both photosynthesis and cellular respiration?
    7·2 answers
  • how does selective breeding and natural selection is simallar to apples ??? PLS HELP NOW I GIVE POINT AND BRAINLIST
    13·2 answers
  • Directions: Select each correct answer. More than one answer may be correct.
    8·1 answer
  • . What dam that is still under construction will replace the current tallest dam?
    6·1 answer
  • Question 6
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!