Average speed :
The horizontal (flat) line on a Distance - time graph shows that the body is at rest because the value of Distance (on y - axis ) is same for increasing time ( on x - axis ), it basically shows that the object is at the same position with the change in time.
therefore, correct option is :
Explanation:
Most waves appear complex because they result from two or more simple waves that combine as they come together at the same place at the same time—a phenomenon called superposition. Waves superimpose by adding their disturbances; each disturbance corresponds to a force, and all the forces add
introurself please
Answer: B) A machine that is 100% efficient
Explanation:
The second law of thermodynamics states that a machine will always be less than 100% efficient as heat is never converted completely into mechanical energy. Even an ideal, frictionless engine can't convert anywhere near 100% of its input heat into work.
Second law of thermodynamics states that any natural system tends to disorder. That is, the total entropy of the universe will tend to increase over time. Heat will alwyas from a hotter body to a colder body.
Answer:
It doesn’t really relate
Explanation:
heavier load the parachute must be moving faster to match the downward force of the greater load
and approx terminal velocity when the parachute is open
velocity for Ping pong ball with parachute = 9m/s
velocity for Soccer ball with parachute = 15m/s
velocity for Golf ball with parachute =24m/s
velocity for Watermelon with parachute = 25m/s
so weight of an object doesn’t really realted how fast it falls with a parachute
Answer:
The gain is the same along all paths. By taking any of the paths the amount of gravitational potential energy will be the same.
Explanation:
