Answer:
There are three ways to charge an object: friction, conduction and induction. Friction involves rubbing on material with another, resulting in electrons moving from one surface to another. ... Friction is useful for charging insulators, which are materials that aren't good conductors.
Explanation:
Answer: .
energy that is produced by mechanical, electrical, or other means and used to operate a device.
Explanation:
Answer:
Big bang describes an ever expanding model of the universe.
Steady state theory explains a universe that always existed in the same state.
Explanation:
The two theories Big bang and Steady state are two of the theories that explain the origin of the universe in two different ways.
The Big bang model states that the universe is ever expanding and began from a singularity. It says that from that time universe is ever expanding creating new clusters of galaxies.
This was proved using mathematical formulae and models .
Steady state theory states that the density of matter remains unchanged due to the creation of matter. Observable universe is the same at any point of time is its summary.
Answer:
The big bang is the theory that describes how the universe emerges, it tells us that in the beginning all the space was contained in a space that was too small, and from there, it expanded rapidly until it reached the state of the universe that we know today, and that continues in expansion.
The theory of the oscillating universe describes a universe that begins and ends cyclically, it beging with something like the big bang, end ends in what is known as the big crunch, and so on. It says that the universe did not have a beginning but has always been restarting.
The theory of the static or steady state universe describes a type of universe uniform in space and time. And in which the universe has always remained the same regardless of where it is observed, wich is different from the other theories since the big bang theory says the universe had a beginning. In this theory it is claimed that the universe is homogeneous and isotropic. This theory is not very popular today.
Hi!
The answer would be three days a week
Bone-strengthening activity is key to ensuring that bones remain healthy to maintain an individual's lifestyle. The physical activity to strengthen bone may be brisk walking, exercises that include weights, or gymnastics to lift a few. The purpose of these activities are to observed to contribute to an increase in the bone mineral density of adolescents and children. Several studies have established that about 150 minutes a week for adults, or 3 days a week (60 minutes a day) for the youth should be devoted to bone strengthening physical activity to ensure good health of the body.
Hope this helps!
Answer:
three or more days a week
Explanation: