Category: Physics

How do I make a polite request? Here are some better phrases to make polite requests in English: “Do you mind…?.” “Would you mind…? “Could I…?” “Would it be ok if…?” “Would it be possible…?” “Would you be willing to…?” Can you make a request? Could and May A third modal for making polite requests […]

Is water a molecule or compound? Water is a compound. It contains more than one element: hydrogen and oxygen atoms are joined together; as illustrated in the video clip Elements and Compounds, above. An important feature of compounds is that they are very different from the elements from which they are made. Which is not […]

Did medieval archers use tabs? English archers usually shot with two fingers and wore a tab that was more like a tied on glove, or an actual glove. Source: Social and Military History of the Longbow, by Hardy. Native Americans generally did not, but many groups used modified pinch grips. Did medieval archers use gloves? […]

How does the apple taste? The flesh is slightly crunchy, but easily gives way. The skin is edible — but flavorless. The apple itself has a distinct flavor making it an apple flavor. It’s a little sour and bitter, but mostly sweet, not at all salty, very juicy in general. What is the color of […]

What is difference between hypothesis and prediction? Difference Between a Hypothesis and Prediction Hypothesis and prediction are both a type of guess. However, the hypothesis is an educated, testable guess in science. A prediction uses observable phenomena to make a future projection. What is the relationship between Type 1 and Type 2 error? In statistical […]

What is the force on a current carrying conductor? The force on a current-carrying wire in a magnetic field is F = IlB sin θ. Its direction is given by RHR-1. What is the force on a current carrying wire that is parallel? Force on a current-carrying wire that is parallel to the magnetic field […]

What is the best definition for luminosity? 1a : the quality or state of being luminous. b : something luminous. 2a : the relative quantity of light. b : relative brightness of something. How is luminosity calculated? Luminosity equation. Absolute and apparent magnitude. Calculating luminosity: an example….Luminosity equation σ is the Stefan Boltzmann constant, equal […]

How do you hand signal a right turn? For right turns, extend your left arm out the driver’s window with your elbow bent and point your hand to the sky with your palm facing forward. Again, it’s best to keep your arm in this position until you begin your right turn, just as you would […]

Which star has the shortest lifespan? red dwarfs Which star has the longest life? The stars with the longest lifetimes are red dwarfs; some may be nearly as old as the universe itself. Red Dwarf Stars. Astronomers define a red dwarf as a star having between about 0.08 and 0.5 times the mass of the […]

Is it better to get fit before playing sports or play sports to get fit? Being fit is very important to overall health. However, when looking at sports performance the goals tend to be more specific and the level of training higher. Just by being fit does not necessarily mean that one is ready for […]