Answer:
An article written by a scientist .
Explanation:
Primary sources information are those that contain first hand information probably from the place of the activities or by the original contact of the information (source ) .
So primary information is normally contained in artifact , journals , letter , dissertations manuscripts , videos and audio recordings .
The fact that the article is written by the scientist means he is the one who has the original information hence he is the first person to access the information , meaning he is the original owner .
Answer:
the planet which is like earth and have suitable environment for living is called exoplanet
Answer:
Initial velocity of first cart will be 0.5 m /sec
Explanation:
We have given mass of the cart
Its collides with other cart of mass
Let the initial velocity of cart 1 is
As the car 2 is initially at rest so = 0 m/sec
After the collision velocity of first cart is 0.25 m/sec
So = 0.25 m/sec and velocity of second cart is 0.50 m /sec
So = 0.5 m/sec
From conservation of momentum we know that
= 0.5 m /sec
So initial velocity of first cart will be 0.5 m /sec
Answer:
Explanation:
Hello,
In this case, since we compute the required energy via:
Whereas m is the mass which here is 70 g, C the specific heat which for water is 4.184 J/(g°C) and ΔT is the temperature difference which is:
Therefore, the energy turns out:
Best regards.