The correct answer is D. Let us analyze briefly each concept in order to justify this answer.
A) Chemical changes are changes in which the nature of the material changes; for example when paper burns. Cutting paper is not a chemical change because the substance of the paper remains the same. When changes are very drastic like the start of the Universe or in radioactive materials, there are nuclear reactions which change the substance and are another category of processes.
B) Cosmic Redshift is an aftermath of the dilation of the Universe. Galaxies that are moving away from us give off a lower frequency light, hence their light is becoming "more red". This is not the cause of the production of light elements.
C) Cosmic Background Radiation is a direct aftermath of the Big Bang and it is predicted by the model. Because we have that at the start, all matter was concentrated together, it was very dense and it radiated. As the Universe dilated, this radiation became less intense, but it is still detectable.
D) Nucleosynthesis is the term we are looking for. It literally means: composition of nuclei. It refers to how protons and neutrons combined in the first 3 minutes to form nuclei of light elements
Answer:
Because a person may be pulled in the direction of the moving train. Thereby causing accident
Explanation:
According to Daniel Bernoulli's theorem, he was widely known as a Mathematician. He stated that due to the higher velocity of a moving train, there is higher kinetic energy in terms of volume around it, while the air pressure between the person and the train becomes lower.
As a result, a person near a moving train may be pulled in the direction of the moving train. Thereby causing accidents that may lead to death.
Answer:
Explanation:
Whether you’re just getting started working out, or you’re looking to add strength training to your cardio routine, weight lifting for beginners can seem anything but simple. There’s a bunch of fitness equipment involved—how exactly do you use that big looped resistance band again?—the moves can be confusing, and you may worry that you might not have the strength to do them.
It’s true that weight lifting can appear intimidating—especially if you’re scrolling through social media and seeing people deadlifting double their bodyweight, pressing a loaded barbell over their head, or banging out Superman push-ups where they fly into the air. But it’s important to remember that those are just highlight reels of people who have been lifting for a very long time. When they first began, you can be pretty sure that they started small. Those explosive push-ups? It’s likely they started as a modified, knees-on-the-floor variation.
And strength training for beginners doesn’t have to start with the goal of getting you to that point, either. If you want to squat superheavy weight, beginning a strength training program can definitely help you get there. But it can also just help you get stronger in ways that will help you in everyday life, too, whether it’s carrying all the grocery bags into the house in one trip or squatting down to the floor to pick up your not-so-cuddly cat.