What is frequency of sound in air?

535

What is constructive interfernce?

606

What is meant by energy spectrum of a black body? : quantum physics

453

For what the parabolic dishes are used?

523

Explain optical telescopes?

530

Explain refraction?

495

Why does sun appear flat during sunrise and sunset?

514

Explain what is the rectilinear propagation of light?

461

What are the three particles that make up an atom?

517

HOW MANY UNITS ARE CONSUMED DURING 1 HR BY 1.5 TON A/C

1650

Mercury is a better barometric fluid than water because?

638

Explain how do you find your body volume using a tape measure?

524

Which is the sound wave that is below the human hearing?

491

Which way do twin screw props on a boat rotate when propelling the boat forward?

480

Give one advantage of a scanning electron microscope over a transmission electron microscope?

509