Category: Physics

What is leaf in simple words? A leaf is an above-ground plant organ and it is green. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which […]

Why is North direction is shown in drawing? North direction on Plan drawing is useful to the construction engineer to understand the orientation of what is shown on the drawing. North arrow on plan points to the North Direction of what is shown on the plan. Knowing north direction room planning becomes easier for architects. […]

What two types of waves are light? The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two […]

Does training in heat improve performance? The training effect of heat, however, goes beyond acclimating to more of it: Heat creates a training stimulus, like speed, hills, or altitude, that can enhance your fitness and running prowess. Rather than thinking of it as an uncomfortable annoyance, consider it a tool. Why is my body hot […]

Under what conditions will two forces form a couple? If there are two forces which are equal and opposite they form a couple. Couple: When two forces of equal magnitude opposite in direction and acting along parallel straight lines, then they are said to form a couple. The perpendicular distance between the two force forming […]

Which of these is an example of a wheel and axle? Some examples of the wheel and axle include a door knob, a screwdriver, an egg beater, a water wheel, the steering wheel of an automobile, and the crank used to raise a bucket of water from a well. When the wheel in a wheel […]

What is the value of k for free space? 9 × 109 What value for A will make a continuous function? 2 Answers. Note that a function f(x) is continuous if limx→af(x)=f(a), means that the global limit as x approches a exists and it’s exactly equal to f(a). The two one-sided limits exist and are […]

What is the electric potential energy stored in the capacitor? The energy stored in a capacitor can be expressed in three ways: Ecap=QV2=CV22=Q22C E cap = Q V 2 = C V 2 2 = Q 2 2 C , where Q is the charge, V is the voltage, and C is the capacitance of […]

What are the effects of temperature? Tensile and yield strengths generally increase slightly as temperatures are reduced and decrease at a progressive rate as temperatures increase. Modulus of elasticity is more stable than strength. Ductility decreases uniformly with decreasing temperature and increases with increasing temperature. Does temperature affect human growth? Increasing heat stress favours smaller […]

What forces are always acting on you? Newton’s Third Law of Motion: The force with which the first body presses the second is called the action force, while the force exerted by the second body on the first one is called the reaction force. Action and reaction forces always occur in pairs. What is the […]