Explanation

The particle's path is a helix.

Reasoning:

• Velocity has two components:
  • Parallel to the fields → electric force accelerates it along the axis
  • Perpendicular to the fields → magnetic force makes it circle around the axis
• Combined → helical path (with changing pitch as it speeds up/slows down)

Explanation

• Length, mass, and time are fundamental physical quantities.
• They can be measured using standard units.
• SI units are the metre for length, the kilogram for mass, and the second for time.

Explanation

Formula:  

Mean = Sum of observations / Number of observations  

Given:  

Mean = 50  

Number of observations = 10  

Sum of observations = Mean _ Number of observations  

= 50 _ 10  

= 500

Last verified on 11-07-2026

Explanation

Given ratio = Nitrogen : Sulphur : Phosphorus = 5 : 3 : 2  

Total parts = 5 + 3 + 2 = 10  

Total weight = 200 kg  

Value of 1 part = Total weight / Total parts  

= 200 / 10 = 20 kg  

Initial weight of Nitrogen = 5 x 20 = 100 kg  

Initial weight of Sulphur = 3 x 20 = 60 kg  

Initial weight of Phosphorus = 2 x 20 = 40 kg  

100 kg of Nitrogen is added.  

New weight of Nitrogen = 100 + 100 = 200 kg  

Verified & Updated

Explanation

• Humidity is the measure of the amount of moisture (water vapour) in the air.
• A hygrometer is used to measure relative humidity.
• A psychrometer is an example of a hygrometer.
• Relative humidity tells us the ratio of water vapour present in the air compared with the maximum amount the air can hold at a given temperature.
• Humidity is commonly expressed as a percentage (%).

Last verified on 23-08-2026

Explanation

• Albuminurophobia is a fear of kidney disease.
• The term is associated with an excessive or irrational fear of developing kidney disease.
• Albuminuria refers to the presence of albumin (a protein) in urine.
• The term is related to concerns about kidney health and disease.

Last verified on 22-08-2026

Explanation

Given:

• Diameter, $d=19mm=0.019m$
• Length, $L=1.51m$
• Tensile force, $P=150kN=150,000N$
• Modulus of Elasticity, E=200GPa=200×109N/m^2

Formula:

δ=PL/AE​

1. Cross-sectional area:

A=πd^2​/4

A=π(0.019)^2/4 ​=0.0002835 m^2

2. Axial elongation:

δ=150000×1.51/ 0.0002835×200×10^9

$$\delta =0.003994m$$

$$\delta =3.99mm$$

Answer: 3.99mm≈4mm​

Explanation

• Earthquakes generate dynamic/inertial forces in a dam.
• These forces can significantly increase the shear stress within the dam.
• Earthquake loading is therefore considered in the seismic design of dams.

Explanation

• Hydrostatic pressure is the pressure exerted by a fluid when it is at rest.
• It increases with the depth of water.
• The basic formula is: P = ρgh
• Here, ρ = density of water, g = acceleration due to gravity, and h = depth.
• It is important in the design of dams, tanks, reservoirs, and retaining structures.

Explanation

• Soil with a particle size less than 0.002 mm and high cohesion is called clay.
• It feels sticky when wet, holds a lot of water, and hardens when dry.