Answer:
The maximum speed the stone can attain without breaking the string is 7.416 m/s
Explanation:
Given;
mass of the stone, m = 0.600 kg
length of string, L = 0.600 m
maximum tension on the string, T = 55.0 N
Total force acting on the stone in horizontal direction is given as;
∑
This force corresponds to maximum tension on the string;
where;
m is the mass of the stone
is the maximum speed the stone can attain without breaking the string, which corresponds to maximum tension on the string.
r is radius of the circular path of the string
The maximum speed the stone can attain without breaking the string is 7.416 m/s
The Sun's magnetic field goes through a cycle, called the solar cycle. Every 11 years or so, the Sun's magnetic field completely flips. This means that the Sun's north and south poles switch places. Then it takes about another 11 years for the Sun's north and south poles to flip back again.
Answer: All of our energy comes from the sun, which is our nearest star. The sun sends out huge amounts of energy through its rays every day. We call this energy solar energy or radiant energy. Without the sun, life on earth would not exist, since our planet would be totally frozen.
Answer:
A) must equal angle of reflection
Explanation:
"The angle of incidence is equal to the angle of reflection". This is true according to the first law of reflection. For this to be totally true, the plane surface in consideration must be a smooth surface. Since it is a law, it cannot be changed because it has been proved to be true.
Note that the angle of incidence is the angle between the incidence ray and the normal ray(this ray is perpendicular to the surface) while the angle of reflection is the angle between the reflected ray and the normal.
Answer:
C. contains negatively charged particles
Explanation:
- J.J Thomson placed two opposite charged electric plates around a cathode ray tube which is a sealed glass tube with high vacuum
- He found that a beam of negatively charged particles are generated in the tube which got attracted to the positively charged plate.
- These subatomic particles are called electrons and they have negative charge.