Explanation

Explanation

Explanation

Power (P) is defined as the rate at which work is done or energy is transferred. The formula to calculate power is:

P = W / t

Where:

W = work done (in Joules)

t = time (in seconds)

First, we need to calculate the work done (W) by multiplying the force (F) by the displacement (d):

W = F × d

= 2.0 N × 1.0 m ( converted 100 cm to 1.0 m)

= 2.0 J

Now, we can calculate the power output (P) by dividing the work done (W) by the time (t):

P = W / t

= 2.0 J / 4 s

= 0.5 W

So, the power output of the motor is 0.5 W.

Explanation

A thermistor has a negative temperature coefficient of resistance.

As temperature increases, its resistance decreases, which is opposite to most materials.

Explanation

On a clear day at noon, the intensity of the solar energy reaching the Earth's surface is approximately 1kW/m 2 (kilowatts per square meter),

which is equivalent to 1000 W/m².

Among the given options, the closest match is:

1 kW/m² (or 1 K W m-2 if expressed in kilowatts per square meter).

Explanation

In a series RLC circuit, when the value of inductive reactance (XL) is equal to (XC)

it is the condition of series resonance.

Under such conditions, the impedance of the circuit is minimum and equal to the value of resistance (R).

Since the resistance is minimum.

So, the value of the current at resonance is maximum.

Explanation

The peak value of current in an AC circuit can be found by dividing the peak voltage by the impedance of the circuit.

Explanation

 A space lattice (or crystal lattice) is a three-dimensional array of points arranged in a regular pattern, where each point has identical surroundings.

These points represent the positions of atoms, ions, or molecules in a crystal.

Unit cell: The smallest repeating unit of the lattice that, when repeated in space, builds the entire crystal.

Lattice points: Individual points in the lattice where atoms or molecules can be located.

Motif: The group of atoms associated with each lattice point.

Explanation

The formula 𝑉 = 𝑊/ 𝑞0 represents electric potential, where 𝑉 is the potential, 𝑊 is the work done, and 𝑞0 is the test charge.

Explanation

When a radioactive element undergoes decay, the number of atoms decreases by half every half-life. So, after "n" half-lives, the number of atoms left behind is:

No × (1/2)^n

Where:

No = initial number of atoms

n = number of half-lives

This is because the decay process follows a geometric progression with a common ratio of 1/2.

So, after "n" half-lives, the number of atoms left is (1/2)^n times the initial number, which is:

(1/2)^n No