Category: Physics

Which is the correct expression for Half-Life? The time required for half of the original population of radioactive atoms to decay is called the half-life. The relationship between the half-life, T1/2, and the decay constant is given by T1/2 = 0.693/λ. What is the half-life for uranium 238? about 4.5 billion years How dangerous is […]

What is ∈ called? The symbol ∈ indicates set membership and means “is an element of” so that the statement x∈A means that x is an element of the set A. In other words, x is one of the objects in the collection of (possibly many) objects in the set A. Which are the real […]

What is the effect of pressure in change of state of matter? Changes in presure have very little effect on the volume of a liquid. Liquids are relatively incompressible because any increase in pressure can only slightly reduce the distance between the closely packed molecules. If the pressure above a liquid is increased sufficiently, the […]

Can the smell of spray paint kill you? If you sniff it and get high off of it, yeah! Spray paint in small amounts kills off brain cells. They are the only ones that don’t reproduce. Large amounts will kill you. Can spray painting cause lung cancer? In the case of spray painting, the paint […]

What is one major difference between plasma and gas and why does that difference exist? They are different and unique from the other states of matter. Plasma is different from a gas, because it is made up of groups of positively and negatively charged particles. In neon gas, the electrons are all bound to the […]

What happen if the ball hit directly on the endline? What happens if the ball hits directly on the endline? The ball may only be contacted 2 times before returning over the net. What is the maximum number of times one person can hit the ball in a row? three What is the maximum hits […]

Why didnt Barber kill Torres? The identity of Torres is defined by his being “an executioner,” whereas the barber’s identity is defined by the job that he does. The barber therefore decides not to kill Torres because he realises that this is not part of his central identity. What is the irony in just lather […]

Why do moms love sons more than daughters? A new survey suggests that mothers are more critical of their daughters, more indulgent of their sons. … More than half said they had formed a stronger bond with their sons and mothers were more likely to describe their little girls as “stroppy” and “serious”, and their […]

How do you ensure confidentiality of participants in research? Researchers employ a number of methods to keep their subjects’ identity confidential. Foremost, they keep their records secure through the use of password protected files, encryption when sending information over the internet, and even old-fashioned locked doors and drawers. How do you maintain participants confidentiality A […]

Can you go crazy from being alone? Being alone might cause you to hallucinate Basically, you’re not reading what’s actually happening correctly and are just reacting to your trauma with forms, visions, or sounds that are a projection of yourself. Kay didn’t experience any of these hallucinations triggered by intense fear or stress. Can u […]