Why do pennies sink in water? The reason the pennies sink in water is because of an idea called density. The pennies have more density than the water, and so the pennies sink. Anything with more density than water will sink in water, but other objects that have less density than water will float. What […]
How high will it bounce rebound ratios?
How high will it bounce rebound ratios? Tennis balls: Must rebound approximately 111cm when dropped from 200 cm. Soccer balls: Must rebound approximately 120cm when dropped form 200cm onto a steel plate. Basketballs: Must rebound approximately 53.5 inches when dropped from 72 inches onto a wooden floor. How can you tell how high a ball […]
Can you use the quadratic formula for inequalities?
Can you use the quadratic formula for inequalities? In other words, a quadratic inequality is in standard form when the inequality is set to 0. Just like in a quadratic equation, the degree of the polynomial expression is two. This method of solving quadratic inequalities only works if the quadratic factors. What is the purpose […]
How can a fully dressed person at rest in the middle of a pond on perfectly frictionless ice get to shore?
What does a black triangle mean?
What does a black triangle mean? The Black Triangle. Just as gay men were forced to wear pink triangles in the concentration camps, many lesbians were forced to wear black triangles, which signified that they (like prostitutes and unmarried women of the streets) did not live according to the Nazis’ ideas of correct female behavior. […]
What is the recommended amount of physical activity for children Topic test?
What is the recommended amount of physical activity for children Topic test? Kids and teens should get 60 minutes or more of moderate to vigorous physical activity daily. Toddlers and preschool children should play actively several times a day. Toddlers should get at least 60 minutes active play every day and preschoolers should have at […]
What are the 5 phases of the moon?
Can dog whistles damage human ears?
Can dog whistles damage human ears? Some sounds (such as gunfire or standing next to a helicopter) are so loud (120-160 dB), that any brief exposure to them without wearing earmuffs or earplugs can damage hearing. (This means that the dog whistles are at a very high frequency but that they do not move the […]
What is CP CV called?
What is CP CV called? The Cp/Cv ratio is also called the heat capacity ratio. (i.e.) Heat Capacity ratio = Cp/Cv = Heat capacity at constant pressure/ Heat capacity at constant volume. How do you calculate CP in thermodynamics? cp = cv + R The specific heat constants for constant pressure and constant volume processes […]