Category: Physics

What is the significance of reference point for measuring distance? A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point. Objects that are fixed relative to Earth – such as a building, a […]

How do I know if my refrigerator condenser is bad? Although a broken compressor is just one common problem with refrigerators, it can also be one of the most often overlooked, too. Your compressor kicking on and off is what you hear (or don’t hear) at various points during the day – you hear a […]

How does a person move forward during swimming? A person applies force on the water in backward direction and water according to the third law of motion water apply an equal and opposite force in the forward direction which helps a person to swim. How do swimmers reduce drag? Here are ten good ways to […]

What does it mean when an object does not slip? It means the object moves uniformly in one direction along the surface, with no angular velocity about the object’s own center of mass. What does it mean when a ball rolls without slipping? Rolling without slipping is a combination of translation and rotation where the […]

What is shear strength test? Shear strength measures a material’s ability to resist forces that cause the material to slide against itself. A universal test machine is used to apply the tensile or compressive load to determine the overall strength of the adhesive once the samples are pulled or pushed apart. … Why is shear […]

What makes a good learning space? Muted colours, gentle lighting, comfortable seating and, when needed, screens for privacy must all be taken into account as well as making sure they are still flexible enough for the individual needs of every pupil. How does space affect learning? With responses from over 1600 educators, our study reveals […]

What is an example of contraction? A contraction is a word made by shortening and combining two words. Words like can’t (can + not), don’t (do + not), and I’ve (I + have) are all contractions. They’re so common that movies and books often try to make characters seem old-fashioned or strange by having them […]

Why is current constant in a parallel circuit? Each resistor in parallel has the same voltage of the source applied to it (voltage is constant in a parallel circuit). Parallel resistors do not each get the total current; they divide it (current is dependent on the value of each resistor and the number of total […]

How do you calculate the no load speed of a DC motor? By multiplying the velocity constant by the nominal motor voltage, obtain the theoretical no-load speed of the motor (zero torque and no-load speed) and plot it on the left vertical axis. Draw a straight line between this point and the stall torque and […]

What do the arrows in a food chain represent quizlet? Food chains show which organisms eat other organisms. The arrows represent the direction of the transfer of energy from one organisms to the next. What causes the arrows to move in this direction? The earth’s rotation causes a phenomenon called Coriolis effect. The lower latitudes […]