Explanation

Calorie is a larger unit of energy.

1 Calorie ≈ 4.184 Joules.

1 Joule = 10⁷ Ergs.

1 Electron Volt (eV) = 1.602 × 10⁻¹⁹ Joules.

Calorie is commonly used to measure energy in food and metabolic processes.

Explanation

Liquified HCl has been cooled until the gas turns into a liquid.

ND06-08-2023

Explanation

The weight of a man in an elevator descending with an acceleration of 4.9 m/s² will become:

Let:

• Actual weight $W=mg$

• Acceleration due to gravity g=9.8m/s^2

• Acceleration of the elevator a=4.9m/s^2

When an elevator descends with acceleration $a$, the apparent weight becomes:

W′=m(g−a)

Substitute values:

W′=m(9.8−4.9)=m(4.9)
W′=1​/2×mg

So, the apparent weight becomes half of the actual weight.

Explanation

Step 1: Recall Ohm's Law

V = IR, where V is voltage, I is current, and R is resistance.

Step 2: Convert current to amperes

300 mA = 0.3$ A

Step 3: Calculate the resistance

R = V/I = 1.5/0.3 = 5 Ω

Explanation

The absorption of X-rays in a given material follows an exponential curve, described by the Beer-Lambert law:

I(x) = I₀ × e^(-μx)

where I(x) is the intensity of the X-rays after passing through a thickness x of the material, I₀ is the initial intensity, μ is the linear attenuation coefficient, and x is the thickness of the material.

Explanation

As ice cream melts, it absorbs thermal energy from the surroundings, but its internal thermal energy decreases as it changes from solid to liquid.

This is a physical change.

Explanation

The rate of flow of charge at a certain point is defined as electric current.

It is measured in amperes (A).

Explanation

The Pacific Ocean is the largest ocean.

It covering about one-third (1/3) of the Earth's surface.

It spans over 63 million square miles, more area than all landmasses combined.

Explanation

A cyclone refers to a large system of winds rotating around a low-pressure center, covering several kilometers.

A twister (or tornado) is much smaller in scale.

Explanation

To find the pressure, we use the formula:

P = F / A

Where:

- P is the pressure

- F is the force (weight) = 392 N

- A is the area = 0.0001 m²

P = 392 N / 0.0001 m² = 3,920,000 Pa

To convert Pascals (Pa) to Megapascals (MPa):

3,920,000 Pa = 3.92 MPa