Category: Physics

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 […]

What is the net external force on an object in free fall? The net external force is just the weight of the object (F = W). Substituting into the second law equation gives: a = W / m = m * g / m = g . The acceleration (change of velocity) of the object […]

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 […]

How do you decline a kiss? Let the person down easy. Look for a way to respectfully and tactfully decline. Try saying, “I’m sorry, but I’m not romantically interested in you.” Say, “I love our friendship, but I’m not ready to take it to the next level.” Say, “Thank you, but no thank you,” or […]

How liquid is measured? noun. the system of units of capacity ordinarily used in measuring liquid commodities, as milk or oil. English system: 4 gills = 1 pint; 2 pints = 1 quart; 4 quarts = 1 gallon. Metric system: 1,000 milliliters = 1 liter; 1,000 liters = 1 kiloliter (= 1 cubic meter). How […]

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 […]

What is loss formula? Formula: Loss = Cost price (C.P.) – Selling Price (S.P.) Profit or Loss is always calculated on the cost price. Marked price: This is the price marked as the selling price on an article, also known as the listed price. How do you set a price? Seven ways to price your […]

What is the angle of reflection if the angle of incidence is 30 degree? Explanation: The angle between the mirror and the incident ray is 30 degrees. The sum of the angle of incidence and this angle (30) makes a right angle. So, the angle of incidence is 90 – 30 = 60 degrees. What […]