Answer:
(C) The speed is the spring passing the neutral point of the spring is 0.32m/s
Explanation:
We use the law of energy conservation. The potential energy stored in the spring is transformed into kinetic energy of the mass, attaining its maximum at the neutral point of the spring (with the spring potential energy being zero there) - that is exactly the point at which we are asked to determine the velocity.
The potential energy stored in the spring compressed by 0.1m is
Neglecting friction, this amount of energy will become the kinetic energy at its maximum:
The speed is the spring passing the neutral point of the spring is 0.32m/s
Answer:
t = 2.13 s
Explanation:
given,
height of the building = 22.3 m
horizontal distance = 127 m
acceleration due to gravity = 9.8 m/s²
time for which ball is in motion = ?
using equation of motion
initial velocity is zero
t = √4.551
t = 2.13 s
Answer: A. The flask would probably feel cooler than before the reaction started.
Explanation: An endothermic reaction is a type of of chemical reaction in which energy is absorbed from the surroundings. The temperature of the surrounding decreases.
An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.
When an endothermic reaction takes place in the flask, the heat is absorbed by the flask and thus the temperature of the surrounding (here the flask) will decrease which can be felt by touching the outside of the test tube. Thus the flask would appear colder.
Answer:
Explanation:
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