What is the minimum sample size? 100 Why is 30 the magic number for sample size? It’s not that “30 in a sample group should be enough” for a study. It’s that you need at least 30 before you can reasonably expect an analysis based upon the normal distribution (i.e. z test) to be valid. […]
What does 1 Coulomb look like?
What is the relationship between kinetic and potential energy and speed?
What is the relationship between kinetic and potential energy and speed? The following equation is used to represent the kinetic energy (KE) of an object. This equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic […]
Can a plane fly through a storm?
Can a plane fly through a storm? All planes are designed to fly through storms and have to comply with safety regulations. A rainstorm is unlikely to cause damage to the aircraft. The only danger of flying through a rainstorm is the risk of freezing rain, but in this case, your plane will most likely […]
How does double rainbow occur?
How does double rainbow occur? Double rainbows are formed when sunlight is reflected twice within a raindrop with the violet light that reaches the observers eye coming from the higher raindrops and the red light from lower raindrops. What does it mean to see a double rainbow? A double rainbow is considered a symbol of […]
What is peak value of AC?
What is peak value of AC? Definition: The maximum value attained by an alternating quantity during one cycle is called its Peak value. It is also known as the maximum value or amplitude or crest value. The peak values of alternating voltage and current is represented by Em and Im respectively. … What is the […]
Why is Congress so powerful?
Why is Congress so powerful? Why is US Congress so Powerful? 1) It is independent from the executive branch of government and cannot be controlled by it. Congress can and does ignore or over-rule presidential policies. 2) It controls the purse-strings, a particular function of the House of Representatives. Which branch of government is the […]
Is it cold in NC in March?
Is it cold in NC in March? In Charlotte, North Carolina, the average high-temperature slightly increases, from a cool 53.6°F (12°C) in February, to a mild 60.4°F (15.8°C). The average low-temperature, in March, is 42.6°F (5.9°C). Does it snow in March in North Carolina? March madness: March 12 snows are common in North Carolina From […]
Does higher mass equal higher inertia?
Does higher mass equal higher inertia? The more mass an object has, the greater its inertia and the more force it takes to change its state of motion. The amount of inertia an object has depends on its mass – which is roughly the amount of material present in the object. What’s the difference between […]