_____ _____hello mate_______
here are five harmful effects of friction
1) It makes us use more fuel
2) The gears in your care will wear down if not lubricated with oil
3) The friction up the device so, due to heating machine can damaged
4) Causes the production of heat between surfaces when the object move
eg : car brakes and tyres heat up due friction
5) Even our shoes wear out due to friction with the ground ; Friction with air causes air craft , meteors to heat
HOPE THE ANSWER WILL HELP U!!!! :-) :-) :-)
:-) :-)
Answer:
20.42 N/m
Explanation:
From hook's law,
F = ke ......................... Equation 1
Where F = Force applied to the spring., k = spring constant, e = extension.
Make k the subject of the equation,
k = F/e ................. Equation 2
Note: The force on the spring is equal to the weight of the mass hung on it.
F = W = mg.
k = mg/e................ Equation 3
Given: m = 250 g = 0.25 kg, e = 37-25 = 12 cm = 0.12 m.
Constant: g = 9.8 m/s²
Substitute into equation 3
k = (0.25×9.8)/0.12
k = 20.42 N/m.
Hence the spring constant = 20.42 N/m
I think it's C, longer wave length.
1.1 A. An electric oven with a resistance of 201Ω and a voltage of 220V drwa a current of 1.1 A.
The easiest way to solve this problem is using the Ohm's Law I = V/R.
An electric oven has R = 201Ω, and a drop of voltage V = 220v, solve using I = V/R:
I = 220V / 201Ω
I = 1.09 A ≅ 1.1 A
