Explanation

Inner Solar System:

Includes the four rocky planets:

Mercury, Venus, Earth, Mars

These are closer to the Sun, have solid surfaces, and are also called terrestrial planets.

Outer Solar System:

Includes the gas giants and ice giants:

Jupiter, Saturn, Uranus, Neptune

These planets are larger, farther from the Sun, and composed mostly of gas or ice.

So, Jupiter is not part of the inner solar system.

Explanation

• One parallel to the field (causes straight motion)
• One perpendicular to the field (causes circular motion)

Explanation

A cell counter is a device specifically designed to count the number of cells in a suspension.

This is crucial in cell culture experiments, as researchers need to know the cell concentration before seeding or performing other procedures. 

Explanation

A semiconductor has electrical properties between a conductor and an insulator.

It conducts electricity under certain conditions, making it essential in electronic devices.

Explanation

Gamma (γ) radiation consists of high-energy electromagnetic waves, such as X-rays or gamma rays, that travel in a straight line and are not affected by electric or magnetic fields.

Gamma radiation is a form of ionizing radiation and can travel several meters in air or several centimeters in dense materials before being absorbed.

Explanation

The velocity of light in a diamond is reduced due to the refractive index of the diamond. The refractive index (n) is related to the velocity of light (v) by the formula:

v = c / n

where c is the speed of light in vacuum (approximately 3x10^8 m/s).

Given the refractive index of diamond is 2.5, we can calculate the velocity of light in diamond as:

v = c / n = 3x10^8 m/s / 2.5 = 1.2x10^8 m/s

So, the correct answer is 1.2x10^8m/s!

Explanation

In an oscillating pendulum, the bob accelerates from its extreme position due to the gravitational force acting on it.

The gravitational force pulls the bob towards the equilibrium position, causing it to accelerate.

Explanation

Newton is a unit of force, not pressure.

The units of pressure are:

• Pascal (Pa) is the SI unit of pressure.
• Bar is a common unit of pressure, equal to 100,000 Pa.
• Atmosphere (atm) is a unit of pressure, equal to 101,325 Pa.

Explanation

To find the acceleration of the sledge, we can use Newton's second law of motion: F = ma, where F is the net force acting on the sledge, m is its mass, and a is its acceleration.

First, we need to find the net force acting on the sledge. The force applied by the man is 60 N, and the force of friction is 20 N, so the net force is:

F = 60 N - 20 N = 40 N

Next, we can plug in the values to Newton's second law:

40 N = (25 kg) × a

To find the acceleration, we can divide both sides by the mass:

a = 40 N / 25 kg = 1.6 ms^-2

Therefore, the acceleration of the sledge is 1.6 ms^-2.

Explanation

A hydrogen-filled balloon expands as it rises and may even burst after rising very high in the atmosphere

As one goes high, the weight of the atmosphere above decreases and so does the pressure.

Thus for a balloon filled on the ground, the pressure inside the balloon exceeds that outside and thus it bursts.