Category: Physics

Why are subtropical highs? The warm air at the low latitudes rises and moves toward the poles. The rising air, and the subsequent clouds and precipitation, cause the tropics to be very wet. As the air moves towards the subtropics, it descends over the oceans and creates semi-permanent circulation features called subtropical highs. Where would […]

How much force does it take to push a shopping cart? A full shopping cart requires a force of 88.0 Newtons to move across a horizontal floor at a constant velocity. What are the forces acting on a shopping cart when a woman pushes it? Answer: 1. frictional force, static force, pressure, etc. What acceleration […]

What weather does a cumulus cloud bring? What weather is associated with cumulus clouds? Mostly, cumulus indicates fair weather, often popping up on bright sunny days. Though if conditions allow, cumulus can grow into towering cumulus congestus or cumulonimbus clouds, which can produce showers. What type of weather does a stratus cloud bring? What weather […]

What are 3 things a testable question needs? A testable question asks how one change (independent variable) has an effect on something else (dependent variable)….Scientific Questions = Testable Questions How does (IV) affect (DV) ? What is the effect of (IV) on (DV) ? What effect does (IV) have on (DV) ? Can you prove […]

How much did a covered wagon cost in the 1800s? It was costly—as much as $1,000 for a family of four. That fee included a wagon at about $100. Usually four or six animals had to pull the wagon. Oxen were slower, but held up better than horses or mules. What type of animal was […]

How much force can a hydraulic press produce? In case the pressure gauge reads 1000 PSI, the 1000 pounds per square inch is applied to 10 square inches. If every square inch of the surface area applies 1000 pounds of force, the 10 square inches will exert a total of 10,000 pounds of force. What […]

What is the formula of urine? On an elemental level, human urine contains 6.87 g/L carbon, 8.12 g/L nitrogen, 8.25 g/L oxygen, and 1.51 g/L hydrogen. The exact proportions vary with individuals and with factors such as diet and health. In healthy persons, urine contains very little protein and an excess is suggestive of illness. […]

What three colors are the primary colors of light? See what happens when you mix together the three primary colors of light: red, green and blue. How do you make primary colors? You can use the primary colors (red, blue, and yellow) plus black and white to get all of the colors of the rainbow. […]

Why are pencils so cheap? “If graphite is so expensive then how come pencils are so cheap?” Because the graphite core (commonly called “lead”, though it contains no lead at all) is not high-grade pure graphite, it is very inexpensive. Is graphite used in batteries? Graphite materials remain the dominant active anode material used in […]

Is density directly proportional to pressure? Density is directly proportional to pressure and indirectly proportional to temperature. As pressure increases, with temperature constant, density increases. What does pressure equal to? Pressure (p) is defined as the normal force F per unit area A over which the force is applied, or. p=FA. p = F A […]