Why does the universe exist? The Big Bang theory is the prevailing cosmological description of the development of the universe. According to estimation of this theory, space and time emerged together 13.799±0.021 billion years ago, and the universe has been expanding ever since. How many planets are there in the universe? 10,000,000,000,000,000,000,000,000 planets How big […]
Why is it a good idea to start with room temperature water in the calorimeter?
Why is it a good idea to start with room temperature water in the calorimeter? It is a good idea to start with room temperature water in the calorimeter because the room temperature water helps to determine the heating up/cooling down because of the environment as the experiment takes place. Because the calorimeter heat is […]
Is there a number C in the closed interval?
What are periods and groups?
What are periods and groups? All the different elements are arranged in a chart called the periodic table. Here are the main features of the table: the horizontal rows are called periods. the vertical columns are called groups. elements in the same group are similar to each other. What does the group number mean? The […]
Does changing the mass affect acceleration?
Does changing the mass affect acceleration? Increasing force tends to increase acceleration while increasing mass tends to decrease acceleration. Thus, the greater force on more massive objects is offset by the inverse influence of greater mass. Subsequently, all objects free fall at the same rate of acceleration, regardless of their mass. How does changing force […]
What happens in the body negative feedback temperature control system?
What happens in the body negative feedback temperature control system? Negative feedback is a vital control mechanism for the body’s homeostasis. When body temperature drops, the hypothalamus initiates several physiological responses to increase heat production and conserve heat: Narrowing of surface blood vessels (vasoconstriction) decreases the flow of heat to the skin. How do you […]
Can we see an atom?
Can we see an atom? In fact, even the most powerful light-focusing microscopes can’t visualise single atoms. Atoms are so much smaller than the wavelength of visible light that the two don’t really interact. To put it another way, atoms are invisible to light itself. What are 5 interesting facts about silver? 8 Fun Facts […]
Can we measure distances in micrometers?
Can we measure distances in micrometers? Depending on the type of micrometer available, a variety of distances can be measured. It could measure the diameter of a hole, the length of the surface of a nail or the depth of a slot. Standard micrometers will measure objects less than one inch in length/depth/thickness. Which is […]
Which element is present in major amount in human body?
Which element is present in major amount in human body? Nitrogen – 2.4kg The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of […]
What are the 7 areas of physics?
What are the 7 areas of physics? Terms in this set (7) Mechanics. Motion and its causes; interactions between objects. Thermodynamics. Heat and temperature. Vibrations and Waves Phenomena. Specific types of repetitive motions- springs, pendulums, sound. Optics. Light (including mirrors), lenses, colors. Electromagnetism. Relativity. Quantum Mechanics. Which is the hardest branch of physics? Which is […]