Answer:
See Explanation
Explanation:
The density of a substance is an intrinsic property. Intrinsic properties are properties that are characteristic of a material. It does not depend on the amount of substance present.
Since density is an intrinsic or intensive property, If you cut a piece of gold in half, the density of each piece will still be 19.32 g/cm 3 because density does not depend on the size of the gold piece.
<u>Answer</u>:
(B) A pot being heated by an electric burner
(D) A radiator that emits warm air and draws in cool air
(E) A hot air balloon rising and falling in the atmosphere
These are some of the examples of the convection currents.
<u>Explanation</u>:
Earlier, electrons were believed to have positive charges and then electric current were discovered. But later after the invention of electric current and current which is termed to be the flow of electrons and is usually flows from negative to positive terminal. But its convention is not discarded in which current moves from positive terminal to negative and it is called convention current. The direction of current shown in the circuit is said to be the convention current.
Hence, the following are the examples of convention current.
1. Boiling water - The energy travels into the pot from the burner, boiling down the water. Then this warm water is accumulating on the top and colder one is heading down to absorb it, triggering a circular motion.
2. Radiator - Place hot air at the peak and pull cool air at the bottom.
3. Hot air balloon - The air is warmed up by a heating element within the balloon, so the air jumps upwards. This induces the balloon to increase in size due to the inside trapping of the warm air. He removes a few of the warm air when the pilot commences to dive, and cold air takes place, enabling the parachute to drop.
SI unit for mas is Kg and the SI unit of weight N for newton
Answer: The wheel's average rotational acceleration is -0.4 radians per second squared (rad/s^2)
Explanation: Please see the attachments below
Answer:
h=0.425 L
Explanation:
Given that
θ = 54°
Coefficient of friction μ = 0.32
Mass of rod = m
Lets take mass of man = M = 4 m
C is the center of mass of the rod.
By balancing force in y and x direction
R= Fr
R = Fr= μ N
N = mg + Mg = mg + 4 m g ( M =4m)
N = 5 m g
Lets take distance cover by man is h along rod before sliding
Now taking moment about the lower end
M g h cosθ + m g cosθ L/2 = R L sinθ
2 M g h cosθ + m g cosθ L = 2 R L sinθ
Now by putting the value of R and M
8 m g h cosθ + m g cosθ L = 2 μ N L sinθ
8 m g h cosθ + m g cosθ L = 10 m g μ L sinθ
8 h cosθ + cosθ L = 10 μ L sinθ
8 h + L = 10 μ L tanθ
Now putting the value of θ and μ
8 h + L = 10 x 0.32 x tan54° x L
8 h + L = 4.4 L
8 h = 3.4 L
h=0.425 L