Answer:
The distance is
Explanation:
From the question we are told that
The coefficient of static friction is
The initial speed of the train is
For the crate not to slide the friction force must be equal to the force acting on the train i.e
The negative sign shows that the two forces are acting in opposite direction
=>
=>
=>
=>
From equation of motion
Here v = 0 m/s since it came to a stop
=>
=>
=>
Answer:
Explanation: Speed = Wavelength x Wave Frequency. In this equation, wavelength is measured in meters and frequency is measured in hertz (Hz), .
Answer:
Option A is correct.
The wires will be arranged in order of increasing resistance.
Explanation:
The resistance of a wire is given by
r = (ρl)/A
where r = resistance of the wire
ρ = resistivity of the wire
L = length of the wire
A = cross sectional area of the wire
Provided all the other parameters are constant, resistance is inversely proportional to cross sectional area
r ∝ (1/A)
And the the cross sectional Area of the wire increases with increase in thickness & decreases with thickness
So, decreasing thickness ----> Decreasing Cross sectional Area ----> Increasing resistance.