Magnets are used in the doors of refrigerators and cupboards to keep the doors closed firmly, create a reliable seal, and increase energy efficiency.
Magnets are often fitted to the doors of refrigerators and cupboards for a reason rooted in physics. This setup helps in keeping the doors closed firmly. The magnets are usually embedded in the door seal, creating an attraction with the metal body of the refrigerator or cupboard. This magnetic attraction pulls the door seal flush against the refrigerator when the door is closed, making an airtight seal. As a result, it prevents the cold air inside the refrigerator from escaping, thereby maintaining the interior temperature and ensuring energy efficiency.
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B) magnetic, electric
C) electric, gravitational
D) gravitational, magnetic
Answer:
Yes
Explanation:
The truck has momentum since it is moving and momentum is a product of mass and velocity. After impact, part of momentum that the truck had is transferred to the car hence the car initially at rest moves a significant diatance. Here, we utilize the formula MV= (m+M)v where M and V represent mass and velocity of the truck while m is the mass of car, v is the common velocity. Note that some letters are capital while others small, don't confuse these.