Category: Physics

Why did the US stay in Vietnam for so long? China had become communist in 1949 and communists were in control of North Vietnam. The USA was afraid that communism would spread to South Vietnam and then the rest of Asia. It decided to send money, supplies and military advisers to help the South Vietnamese […]

Is air a renewable? Air and water are renewable natural resources too. There is one other type of renewable natural resource. It includes sources of power like sun and wind energy. Are plants renewable or nonrenewable? Plants are a renewable resource because they grow quickly and can replace themselves at fast rates. Several factors influence […]

What is the best title for friendship? You and Me… Buds Forever! You Can Count on Me. You Can Never Have Too Many Friends. You Make My Heart Sing. You, My Friend, are Part of All My Best Memories! You’re one in a Million. You’ve Got a Friend in Me. Your Friendship Makes My Heart […]

How do you know if a molecule is radical? My TA told us that the easiest way to tell if a molecule is a radical is if it has an odd-numbered amount of valence electrons. If it has an even number of valence electrons then it would not be a radical. How are radicals applied […]

How does natural selection affect humans? Probably more than you might think, a new study suggests. Natural selection is still influencing the evolution of a wide variety of human traits, from when people start having children to their body mass index, reports a study published Monday in the journal Proceedings of the National Academy of […]

Is heat a low quality energy? High quality energy means electrical energy, mechanical energy, and some forms of chemical stored energy, for example, the fossil fuels. Low quality energy means low temperature heat. Why is heat or thermal energy the lowest quality of all? Question 7 0 out of 1 points Why is heat or […]

What is a component of a vector? Each part of a two-dimensional vector is known as a component. The components of a vector depict the influence of that vector in a given direction. The combined influence of the two components is equivalent to the influence of the single two-dimensional vector. How do you create a […]

What is a ABPI Doppler? Ankle brachial pressure index (ABPI) The ABPI is the ratio of the ankle systolic blood pressure to the brachial systolic blood pressure and can be measured using a sphygmomanometer and a hand held Doppler device [SIGN, 2010]. It is the most reliable way to detect arterial insufficiency. What should ABPI […]

Why does GM counter need quenching? Quenching. When a GEIGER-MULLER tube operates in Geiger region, the secondary electrons increase the current pulse by further ionization of gas molecules. Therefore, it is desirable to prohibit the production of spurious pulse following the main required plus due to a single particle entry. Can GM counter detect neutrons? […]

How do you apologize for sending the wrong attachment? Dear [Recipient Name], I am writing to sincerely apologize for sending you the wrong attachment in the mail [Date] under the subject [Subject]. I got confused between the two mails and sent you the other attachment by mistake. I understand this might have caused you inconvenience. […]