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
Umnica [9.8K]
3 years ago
15

Which of the following is an example of a primary source?

Physics
1 answer:
Oduvanchick [21]3 years ago
8 0

Answer:

i think its no c.

a textbook written by a scientist. because its a first hand data.

You might be interested in
Watt (w) is a drived unit why​
ValentinkaMS [17]

Answer:

because it is from a mathematical combination of SI base units

Explanation:

4 0
3 years ago
An attack helicopter is equipped with a 20- mm cannon that fires 88.7 g shells in the forward direction with a muzzle speed of 9
Svetradugi [14.3K]
The impulse imparted to the shells equals the change in the momentum:
Fav*(Delta t)= Delta m*v.
The mass change is
Delta m= n*m= (89.9shells)*(88.7g)=7.97Kg
So the average force is
F=((v)*(Delta m))/t= ((929)*(7.97))/4.84=1529.78 N
Since the velocity of the shells is much greater than the velocity of the helicopter, there is no need to use relative velocity.



4 0
3 years ago
A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the
Bond [772]
Momentum of the car is 46.2 kgm/s
8 0
3 years ago
PLEASE HELP!!
adelina 88 [10]

Answer:

D

Explanation:

Michael Faraday is probably best known for his discovery of electromagnetic induction, his contributions to electrical engineering and electrochemistry or due to the fact that he was responsible for introducing the concept of field in physics to describe electromagnetic interaction.

Electromagnetic or magnetic induction is the production of an electromotive force across an electrical conductor in a changing magnetic field.

Electrical engineering is an engineering discipline concerned with the study, design and application of equipment, devices and systems which use electricity, electronics, and electromagnetism.

Electrochemistry is the branch of physical chemistry that studies the relationship between electricity, as a measurable and quantitative phenomenon, and identifiable chemical change, with either electricity considered an outcome of a particular chemical change or vice versa.

6 0
3 years ago
Set the ball and the barrier about two feet apart on the table. Grasp both ends of the ruler. Push the ball using the center of
almond37 [142]

Answer:

its rolling

Explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • A wooden block has a mass of 20.0 kg and a specific heat of 1700 J/kg °C. Find the change in thermal energy of the block as it w
    10·1 answer
  • What is the frequency of a sound wave commonly called?
    7·1 answer
  • A car is traveling at 20 meters/second and is brought to rest by applying brakes over a period of 4 seconds what is its average
    11·2 answers
  • The moon's gravity is one-sixth that of the earth. what is the period of a 2.00m long pendulum on the moon
    6·1 answer
  • Which of the following correctly describes the relationship between speed and velocity?
    12·2 answers
  • Under copyright law people have to get permission to any photos you take post to social media sites?
    9·1 answer
  • Which is the transfer of thermal energy in matter with no overall transfer of matter? If you copy the answer from the last quest
    7·2 answers
  • ¿Cuál es la intensidad del campo eléctrico a una distancia de 2 m de una carga de -12μC? *
    7·1 answer
  • How can scientist best confirm and validate the result of an experiment so they can publish their findings?
    14·2 answers
  • I do believe that i need help
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!