Answer:
1 and 3
Explanation:
<u>1 and 3 </u>
Increasing coils increases strength
COOLING the wire would increase current flow and strength of magnet
Adding an iron core will definitely increase the strength of the electromagnet
The momentum of a 5kg object that has a velocity of 1.2m/s is 6.0kgm/s.
<h3> MOMENTUM:</h3>
Momentum of a substance is the product of its mass and velocity. That is;
Momentum (p) = mass (m) × velocity (v)
According to this question, an object has a mass of 5kg and velocity of 1.2m/s. The momentum is calculated thus:
Momentum = 5kg × 1.2m/s
Momentum = 6kgm/s.
Therefore, the momentum of a 5kg object that has a velocity of 1.2m/s is 6.0kgm/s.
Learn more about momentum at: brainly.com/question/250648?referrer=searchResults
The first blank: HEAT
The second blank: ELECTRICAL
The ease with which a material allows electricity to move is called
C. CONDUCTIVITY
Answer:
If one were to use 5 billion years as the age of the universe and 75 years as the average human life span then
T = 75 / 5 E9 = 1.5E-8
The number of seconds in a year is 3600 * 24 * 365 = 3.2E7
If t = N * T seconds in a year * fraction of human life span
t = 1.5E-8 * 3.2E7 = .48
A human life span is about 1/2 second compared to the life of the universe if the universe were compressed to a single year