Answer:
Rube Goldberg Machine is "a comically involved, complicated invention, laboriously contrived to preform a simple operation." 2. What are the 6 Simple Machines? A. The 6 Simple Machines are: wedge, screw, lever, wheel and axel, inclined plane and pulley.
the answer is spiral galaxies
Answer: I would choose options C and D
Explanation:
Answer: Option A
Explanation:
The potential energy decreases in the case when the charges are opposite and they attract each other.
In this case there is no external energy required in order to put the charges together.
This is so because the charges are opposite and they will attract each other. Yes, the only condition should be that the charges should be alike.
Example: a negative charge and a positive charge.
Answer:Mechanical ventilation system
Explanation:
Ventilation can be increased to safe levels by using mechanical ventilation system to bring in more fresh air.
There are many ways to provide ventilation for example
- providing ventilation fans in kitchens and bathrooms to remove allergens,moisture.
- A duct should be provided such that it provides fresh air to different rooms and provision should also be made to remove the poor air inside home.
