Explanation

Aluminium is a chemical element with the symbol Al and atomic number 13.

Melting point: 660.3 °C

Density: 2.7 g/cm³

Block: p-block

Explanation

Pressure:

The speed of sound is independent of pressure

i.e. speed remains unchanged by the increase or decrease of pressure. 

Temperature:

The speed of sound is directly proportional to the temperature.

Therefore, as the temperature increases, the speed of sound increases.

Humidity:

The speed of the sound increases in humid air compared to the dry air

Because of the weight of water vapor

Explanation

The radius of the nucleus is about 10^5  times less than the radius of the atom.

Explanation

A wind vane (also known as a weather vane) is a wind direction instrument that has been around for more than 2,000 years 

it was invented by the Greek astronomer Andronicus in 48 B.C.

while 

An anemometer is an instrument that measures wind speed.

ND17-7-2023

Explanation

Weight(mg) of a block = 20N

Height (h) = 6m

Now, potential energy(PE) = mgh

=20 × 6

= 120Joules

The potential energy stored in it is 120 joules.

Explanation

The lingual vein is formed by the sublingual, deep lingual, and dorsal lingual veins

The lingual vein begins on the dorsal side and under the surface of the tongue.  

Explanation

• the food ingested in liquid form by the animals is classed as Fluid Feeders
• **

The different types of nutrition in animals include:

• Filter Feeding: obtaining nutrients from particles suspended in water. 
• Deposit feeding: obtaining nutrients from particles suspended in the soil.
• Fluid feeding: obtaining nutrients by consuming other organisms' fluids.

Explanation

Adding more SO₂ – This would increase the yield by shifting the equilibrium toward the product (Le Chatelier's principle).

Explanation

When an electron moves perpendicular to a magnetic field, the electromagnetic force (also known as the Lorentz force) acting on the electron is given by the formula:

F=qvBsin(θ)

Where:

• $F$ is the force,
• $q$ is the charge of the electron,
• $v$ is the velocity of the electron,
• $B$ is the magnetic field strength,
• $$θtheta is the angle between the velocity vector and the magnetic field.

When the electron is moving perpendicular to the magnetic field, $theta = 90^circ$ and $sin(90^circ) = 1$

Therefore, the force becomes:

$$F=qvB$$

This means the force is at its maximum value since both the charge and the velocity contribute to the force. Thus, the statement that the force acting is maximum is correct.

Explanation

To find the moles, divide the mass of NaOH (60g) by its molar mass (40g/mol). 

Moles = 60/40 =1.5 moles