Answer:
b
Explanation:
this is because inoder. for combustion or burning to take place oxygen must be available
<u>Answer:</u>
The correct answer option is C. buzzer.
<u>Explanation:</u>
We know that Jeff's father needs to get a device from his workshop that converts electrical energy to sound energy.
So from the given options, buzzer is the best option Jeff's father can install in his house's security system.
An electric buzzer converts an electrical oscillating voltage into a sound output. In other words, the electrical pulses are converted into sound vibrations.
Answer:
current
.
.
.....is the correct answer
Answer:
Explanation:
Potential Energy is the energy associated with the object (having some mass) due to its position or state. It is a function of height and is dependent on datum i.e. it is measured relative to another body.
For example, if we change the body horizontally without changing its height then Potential energy associated with it is zero because there is no change in height.
Answer:
Eelas = 0.25[J]
Explanation:
This problem can be solved using the principle of energy conservation, in this particular case related to elastic energy.
The elastic energy can be calculated by means of the following equation:
where:
k = The spring constant is 50 [N/m]
x = distance compressed = 0.3 - 0.2 = 0.1 [m]
![E_{elas}=0.5*50*(0.1)^{2} \\E_{elas}=0.25[J]](https://tex.z-dn.net/?f=E_%7Belas%7D%3D0.5%2A50%2A%280.1%29%5E%7B2%7D%20%5C%5CE_%7Belas%7D%3D0.25%5BJ%5D)
