Category: Physics

Is there gravity underwater? There is plenty of gravity underwater. That gravity is just offset by buoyancy, which is caused by the pressure in the column underneath a submerged object being greater than the pressure in the column above that object, resulting in net upward force on the object that mostly (but not completely) balances […]

What levers are in the human body? Biomechanics: Lever Systems in the Body The gastrocnemius muscle. The greater the ratio of the effort arm to the load arm, the more efficient the lever system is (i.e. the easier it is to move the load). The atlanto-occipital joint as a first class lever. The elbow joint […]

How can you tell if you see ultraviolet light? By definition, ultraviolet light is ‘beyond violet light’ and the visible spectrum that can be detected by the human eye. It cannot, therefore, be seen directly. Detectors that are sensitive to UV convert it into a form that we can see. In this scenario, however, UV […]

What is the strength of the electric field at point 4 cm from the center? Explanation: A) At point 4 cm from the center, strength of the electric field is 0. Why does a dipole produce an electric field? Instead, on one surface the dipole heads create a positive surface charge, while at the opposite […]

Why is frost shattering climate related? Freeze-Thaw Weathering: also called frost-shattering as it occurs in cold climates when temperatures are often around freezing point and where exposed rocks contain many cracks. As the water turns into ice it expands and exerts pressure on the surrounding rock, causing pieces to break off. What is the meaning […]

What is the ratio of velocity to speed? The displacement of the body in given time is always equal to or less than distance covered, because, velocity is displacement per unit time and speed is distance covered per unit time, therefore, ratio of magnitude of velocity and speed is always equal to or less than […]

What kind of information does a life cycle cost LCC analysis provide? Performing a life-cycle cost analysis (LCC) gives the total cost of a lighting system—including all expenses incurred over the life of the system. What is lowest life cycle cost? Lowest life-cycle cost (LCC) is the most straightforward and easy-to-interpret measure of economic evaluation. […]

Is 40 percent protein too much? General recommendations are to consume 15-25 g of protein at meals and in the early recovery phase (anabolic window) — 45 minutes to1 hour after a workout. Studies show higher intakes (more than 40 g) are no more beneficial than the recommended 15-25 g at one time. Don’t waste […]

What will be the momentum of a stone having mass of 10 kg? 20 kg m/s Are heavier cars faster? What’s clear is that a lighter car will accelerate more or require less force to accelerate like a heavier car. As the acceleration is slower with a heavier car of the same power, you have […]

What are the 2 Equations for electrical energy? If voltage, (V) equals Joules per Coulombs (V = J/C) and Amperes (I) equals charge (coulombs) per second (A = Q/t), then we can define electrical power (P) as being the totality of these two quantities. This is because electrical power can also equal voltage times amperes, […]