V=f*lambda .. so make lambda the subject.. Lambda is equal to V/ F ... the answer is 6.66*10^3. I converted km to meters
They do not let electricity pass through their atoms, causing the electricity to be unable to move through the non metal
.
Answer: D. Energy is always conserved
Explanation: The law of energy conservation says that energy is neither created or destroyed, that it is only transferred or transformed from energy. "Conserved" means to maintain a constant overall total, which ties directly into the law of conservation (Energy can't be created nor destroyed, it can only be transferred or transformed from one form to another).
Explanation:
For Domestic circuits parallel arrangement is always used because: In parallel circuits, if one electrical appliance stop working due to some effect then all other appliances keep working normally.
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Answer:
218.5 N
Explanation:
In order for the sled to be in equilibrium along the vertical direction, the forces acting along this direction must be balanced. So the equilibrium equation is:
where
N is the normal force
F = 50 N is the force that pulls the sled
is the angle between the force and the horizontal, so
is the component of F acting along the vertical direction
(mg) is the weight of the sled, with
m = 25 kg being the mass of the sled
g = 9.8 m/s^2 is the acceleration due to gravity
Solving the formula for N, we find