Answer:
The answer is the third option, the minimum force required to overcome static friction and move an object.
Explanation:
The first choice is talking about an object moving, and anything moving relates to <em>kinetic </em>friction, not static friction. I don't think it's the fourth option because, even with the net force being 0, the object could still be moving (again relating to kinetic friction).
Answer
Speed of 320 gram cart will be 0.377 m /sec
Explanation:
We have given mass of the air track
Velocity of the air track
Mass of the cart
Cart is at stationary so velocity of cart
Now according to conservation of momentum
Answer:
Temperature = 34.19 °C
Explanation:
At temperature T₁ = 0 °C
Resistance R₁ = 11.50 Ohms
At Temperature T₂ = 100 °C
Resistance R₂ = 17.35 Ohms
The change in resistance = ΔR = R₂ - R₁
ΔR = 17.35 - 11.50 = 5.85 Ω
The change in Temperature = ΔT = T₂ - T₁
ΔT = 100 - 0 = 100 °C
Temperature coefficient of resistance = α = ΔR / ΔT
Temperature coefficient of resistance is the measure of change in electrical resistance of any substance per degree change in temperature.
α = 5.85 / 100 = 0.0585 Ω / °C
We need to find the temperature when resistance is 13.50 Ω
So,
Temperature = T = ?
Resistance = R = 13.5 Ω
The change from 2.71Ω to 3.26Ω = 13.5 - 11.5 = 2.00 Ω
The temperature Change required is = 2.00 / 0.0585 = 34.19 °C
Temperature = T = 0 + 34.19 = 34.19 °C
At Temperature 34.19 °C the Resistance will be 3.26 Ω
<span>It's like a styrofoam it is a good conductor and it keep things warm with out energy but if you use a conductor that has energy like a heater or something that would be using a conductor with energy</span>