Category: Physics

How do I know if my tub is cast iron? If you can see the tub from underneath and it looks black it is probably cast iron. If it is more like bright metal it is steel. If you want, remove the overflow cover and popup lever from the head end of the tub and […]

What is an inertial frame of reference in physics? Within the realm of Newtonian mechanics, an inertial frame of reference, or inertial reference frame, is one in which Newton’s first law of motion is valid. An inertial frame of reference is one in which the motion of a particle not subject to forces is in […]

How do you use a ray diagram? 1. Pick a point on the top of the object and draw two incident rays traveling towards the mirror. Using a straight edge, accurately draw one ray so that it passes exactly through the focal point on the way to the mirror. Draw the second ray such that […]

What is the formula of circuit? The total resistance in a series circuit is equal to the sum of the individual resistances: RTotal = R1 + R2 + . . . R. Total voltage in a series circuit is equal to the sum of the individual voltage drops ETotal = E1 + E2 + . […]

Which of these is a consequence of speeding less wear on brakes? When a car is speeding, the ability of the car to make sharp bends is decreased because the time required to negotiate the bend is reduced. When at high speed, the brakes can easily fail due to high wear and tear on the […]

What are the similarities and differences between prokaryotic and eukaryotic cells? Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow […]

Is sin 90 degrees undefined? The exact value of sin 90 degrees is equal to 1. What if Tan is undefined? tan(θ) will be undefined when x = 0, since you would be dividing by zero. This places you at an angle of either 90º or 270º. Is Tan 0 undefined? Trigonometric functions are equal […]

Which one of the following cation is not present in group II? Thus, chromium ion is not included in 2nd group, it is included in third analytical group of cation as Cr+3. Was this answer helpful? What are the cation classifications? Cations Classification Group Group reagent Cations Acid-basic I There are not K+, Na+, Li+, […]

How is energy transferred in a bicycle? Mechanical energy usually means the sum of the kinetic energy and potential energy. So when you ride your bike you hope that the muscular (chemical) energy is converted mainly into mechanical energy. Unfortunately friction will produce heat and sound and will reduce the amount of mechanical energy that […]

Why do electrons lose or gain electrons? Explanation: Atoms and chemical species lose or gain electrons when they react in order to gain stability. Thus, typically, metals (with nearly empty outer shells) lose electrons to non-metals, thereby forming positive ions. The number of electrons depends on their position on the Periodic table (in simple terms). […]