Answer:
A. Their same forces repel each other, and their opposite forces attract each other.
Explanation:
As we know by the property of electric charge that similar charges repel each other and opposite charges attracts each other
So here we have similar situation in magnets also
Two similar poles or like poles of magnet i.e. North - North poles or South - South poles always repel each other
And also we can see that opposite poles of magnet each other i.e. North pole and south pole always attract each other.
SO here correct answer is
A. Their same forces repel each other, and their opposite forces attract each other.
Answer:
The velocity of the blades is 88.185 m/s.
Explanation:
Given;
length of the blade, r = 80 m
angular speed, ω = 1 rev per 5.7 seconds
The velocity of the blades is calculated by applying the following circular motion equation that relates linear velocity (V) and angular speed (ω);
Therefore, the velocity of the blades is 88.185 m/s.
Hi,
My best answer would be Gravity. Is it a multiple choice question? Or is it an essay question.
Answer:
1: v = √E/ρ where E is the elasticity and ρ is the density. Newton's assumed that sound wave travel in air under isothermal condition
2: He corrected Newton's formula by assuming that, there is no heat exchange takes place as the compression and rarefaction takes place very fast. Thus, the temperature does not remain constant and the propagation of the sound wave in air is an adiabatic process.
Answer:
The magnitude of the average drag force is 2412.34 N.
Explanation:
Given that,
Mass of car
Velocity v = 25.8 m/s
Distance
Speed of car = 13.1 m/s
Height = 12.5 m
We need to calculate the magnitude of the average drag force
Using equation kinetic energy
Where, = initial velocity
= final velocity
h = height
g = acceleration due to gravity
=drag force
m = mass of the car
d = distance
Put the value into the formula
Hence, The magnitude of the average drag force is 2412.34 N.