Answer:
Work done by the boy is 7.50 J
Explanation:
mass of the ball m = 0.5kg
height of the bookshelf h = 1.5 m
acceleration due to gravity = 10 m/s²
work done = ?
Workdone = force × distance
In this case Weight = Force
Workdone = mgh
= 0.5 × 10 × 1.5
= 7.50 J
Answer:
When a capacitor is fully charged, no current flows in the circuit. This is because the potential difference across the capacitor is equal to the voltage source. (i.e), the charging current drops to zero, such that capacitor voltage = source voltage.
Explanation:
Hope this helps
Answer:
The speed is
Explanation:
From the question we are told that
The mass of the first skater is
The final speed of the first skater is
The mass of the second skater is
According to the principle of linear momentum conservation
Here
Since they they started from a stationary position
So
While
substituting values
So
=>
<h3><u>Given</u><u>:</u></h3>
Force,F = 100 N
Acceleration,a = 5 m/s²
<h3><u>To</u><u> </u><u>be</u><u> </u><u>calculated:-</u><u> </u></h3>
Calculate the mass of a box.
<h3><u>Solution:-</u><u> </u></h3>
★Putting the values in the above formula,we get:
Thus,the mass of a box is 2 kg.
Answer:
A. investigates the overall structure and history of the Universe.
Explanation:
Astronomy is the branch of natural science that studies the objects of a celestial nature.
Cosmology is a part of astronomy that examines the origin and the how the universe changes with the passage of time. The model which is widely accepted as how the universe came into being is the Lambda-CDM model.
According to the Lambda-CDM model the universe consists of cold dark matter, matter and dark energy.