an object falls through the air, gainign speed as it falls. a student claims that this creates new energy, and so it breaks the law of conservation of engery. which statmend describes why the student is incorrect?
A speed is not related to energy in any way
B equal and opposite amounts of other enegry are also created
C energy can be created without breaking the law of conservation of energy
D energy is converted from other forms, not created
D energy is converted from other forms, not created
a person throws a ball up into the air, and the ball falls back toward earth. at which point would the kinetic energy be the lowest?
The kinetic energy of the ball would be the lowest at the highest point of its trajectory, just before it begins to fall back toward Earth.
a book is at rest on a flat table. a person gives the book a shove and it slides across the table. the book eventually comes to rest again near the edge of the table. how does the potential and kinetec energy change during the process?
A - the kinetic energy increases when the book is shoved and then gradually decreses as it slides across the table and then comes to rest on the edge.
B - the potential stays the same since the book is on the table. energy stays the same since the book was only shoved.
C - the potential and kinetic energy are the same while the book is sitting on the table. they both increase when the book is shoved and then decrease as the book comes to rest again.
D - the potential energy increases as the book is pushed across the table. the kinetic energy stays the same since the book was shoved.
C - the potential and kinetic energy are the same while the book is sitting on the table. They both increase when the book is shoved and then decrease as the book comes to rest again.
whats a good descripion of potential energy?
Potential energy is a type of energy possessed by an object due to its position or condition. It is often described as "stored energy" because it has the potential to be converted into other forms of energy and can do work. Potential energy is dependent on factors such as height, position, or the forces acting on an object. Some examples of potential energy include gravitational potential energy, elastic potential energy, or chemical potential energy.
which list of places requires semicolons instead of commas?
north dakota, south dakota, north carolina, south carolina, and west virginia
sacramento, california, denver, colarado, phoenix, arizona, and santa fe, new mexico
brazil, venezueala, colombia, ecuador, chile, argentina, peru, and bolivia
europe, asia, africa, and australia
brazil, venezueala, colombia, ecuador, chile, argentina, peru, and bolivia
which sentence requires semicolons instead of commas?
(question 2, using semicolons quick check)