shalinichikapudi

What does the color of the sky look like when traveling by air in the sky at high altitude?

(A) Red

(B) Black

(C) Yellow

(D) Blue

 A stick inserted in water looks crooked. this is due to ?

(A) Reflection

(B) refraction

(C) Reflection and refraction

(D) None of these

Which of the following is not a unit of mass?

(A) Pound

(B) Dine

(C) Village

(D) kg

Light year is a unit of which of the following physical sign?

(A) Short time interval

(B) mass

(C) Work

(D) distance

Used in eyeglasses for a person suffering from myopia?

(A) convex lens

(B) concave lens

(C) concave mirror

(D) convex mirror

What type of force acts on a car moving on a circular curved path?

(A) Centrifugal force

(B) Cohesive force

(C) Centripetal force

(D) Gravitational force

Which of the following metals has maximum thermal conductivity?

(A) Iron

(B) Aluminum

(C) Silver

(D) Copper

What is the normal temperature of the human body?

(A) 65 degrees

(B) 95 degree

(C) 98.6°F

(D) 99 degrees

Jyoti is a unit of intensity?

(A) Opter

(B) Candela

(C) Newton

(D) None of these

how does the weigth of mercury in a barometer tube compere with the weight of an equal cross section of air from sea level to the top of the atmosphere?

As a storm front moves in, you notice that the column of mercury ina barometer rises to only 733 mm.

A.) What is the air pressure?

P = ___ Pa

B.) If the mercury in this barometer is replaced with water, towhat height does the column of water rise? Assume the same airpressure found in part A.

h = ___ m

For a water barometer, why is the maximum height of the tube 10.2 meters?

 Instrument for measuring blueness of the sky or ocean is called ___________.

(A) Bathymeter

(B) Ceraunograph

(C) Cyanometer

(D) Barometer

If the universal gravitational constant were not really constant,but in fact were larger near jupiter, what effect would that haveon the calculated period of jupiter's mass? explain.

Why Refraction takes place 

 In May 2019, the kilogram was redefined for the first time in 130 years. It will now be redefined as a fundamental property of nature, called what?

(A) Planck's constant

(B) electrical constant

(C) Gravitational constant

(D) magnetic constant

Which of the following elements has lowest melting point? 

(A) Titanium

(B) Sulphur

(C) Argon

(D) Zinc

Describe the surface you would use to determine the electric flux from a charged conducting plane surface.

Where does electric power reside in a charged conducting material?

(A) Central part

(B) Over the body

(C) Depends on the nature of the body

(D) The outer surface

The generator in an AC resistor circuit creates a maximum potentialdifference across the 175 O resistor of 243 V. What is theamplitude of the alternating current if the frequency of thegenerator is
(a) 455 Hz?
(b) 875 Hz?

Answer in Amps

Give the disadvantages of a direct current generator over alternating current generator.

A book is resting on a desk. Why is is not correct to say that the normal force on the book is equal to the weight because of Newton's 3rd law?

What is Newton 3rd law of motion?

Why is density of liquid water is greater than that ice