Plastic and glass are both poor heat conductors. They are insulators which means their electrons don’t move as freely as conductors.
Answer: B
The only difference between these different types of radiation is their wavelength or frequency
Explanation:
Less of a glass of water because a glass of water holds approximately 250 mil-liters of water
Answer: 4.27 x 10^-10 N to the left
Explanation: I just took this quiz
Answer:
157.36 N
Explanation:
Contact force is the force which is created due to contact and it is applied on the contact point . The force applied by body on the surface is its weight .
If R be the reaction force of the ground
R = mg + F son30
= 12 x 9.8 + 75 sin 30
= 117.6 + 37.5
= 155.10 N .
friction force = f
Net force in forward direction = F cos 30 - f = ma
75cos 30 - f = 12 x 3.2
f = 65 - 38.4
= 26.6 N
Total force on the surface =√( f² + R² )
√ (26.6² + 155.1²)
= √707.56 + 24056²
=√ 24763.57
= 157.36 N.
contact force = 157.36 N .
