Category: Physics

What is the highest on Richter scale? In theory, the Richter scale has no upper limit, but, in practice, no earthquake has ever been registered on the scale above magnitude 8.6. (That was the Richter magnitude for the Chile earthquake of 1960. The moment magnitude for this event was measured at 9.5.). Where is the […]

How many circles do you need to balance the scale? Since there are 3 purple circles, we need 3 × 2 = 6 3 \times 2 = 6 3×2=6 green squares in order to balance the scale. What is a balance beam scale? A device for weighing. It has a balanced beam and two pans. […]

Should you lean forward while skiing? You only need to lean forwards enough to put your centre of gravity over the middle of the ski. The reason that this has become a myth is that one of the most common mistakes made by people learning to ski, is that they lean back, and that instructors […]

Which planet has the greatest eccentricity? Mercury How is Earth’s eccentricity calculated? The formula to determine the eccentricity of an ellipse is the distance between foci divided by the length of the major axis. What is the maximum allowed value for eccentricity? 0.057 Is Earth’s orbital eccentricity large or small? The eccentricity of Earth’s orbit […]

What is tertiary motion? Tertiary motion is sequence motion. It is determined by the specific use oi one or several ofthese transition devices: the cut, the jump cut, the dissolve, the wipe, the fade, and special transitional effects. The cut is an instantaneous change from one image to another. What are the primary motions? For […]

Why are seawalls bad for beaches? They’ve been shown to disrupt the natural pattern of beach replenishment along the coast. Seawalls also speed up erosion on bluffs, putting adjacent ocean-front property at risk. According to the California Coastal Commission, about a third of Southern California beaches are armored with seawalls. How long does it take […]

What is the final velocity when a body is dropped from a height? Answer: final velocity of the object will be 0 m/s. What is the initial velocity when a body is dropped from a height? Initial velocity of a body when dropped from a height is zero, i.e., u=0. When an object is dropped […]

What products increase friction? There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the ‘designs’ that you can see on the tyre surface), which increase the friction […]

How can groundwater erosion be prevented? mulch. Using straw, wood chips, saw dust, or some other material as ground cover can limit the effects of erosion until plants or crops can grow to the point of protecting the soil themselves. Are caves formed by erosion? Corrasional or erosional caves are those that form entirely by […]

What will happen if a house do not have a vent system? It can make our homes “sick”, with condensation and mould damaging the walls and fabric of our houses. But, more importantly, it can make the occupants sick. High humidity levels can affect allergies and complicate respiratory diseases brought on by certain biological agents […]