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When a cracker at rest explodes into two equal parts, in which of the following ways will these parts move?

A body weighs 6kgf on moon. What is it's weight on earth? Express the weight in Newton.

Describe Franklin's experiment. What did he conclude from his experiment?

Which of the following modes is utilised in the production of sound by humans ?

(a) vibrating membranes (b) vibrating plates (c) vibrating strings (d) vibrating air columns

If water decreases friction then why we have to aplly a lot of force to move a notebook lying on a wet wodden surface

The type of sound used for scanning and imaging the position and growth of a human foetus is

If two points are maintained at 5V each and a resistor of 10 ohms is connected across them, what is the current across them?

Silver is more likely to tarnish now than it would have 500 years ago. Explain.

Why we do not feel atmospheric pressure?

The unit of electrochemical equivalent is

[EAMCET 1980]

The way we sense _____ of a sound wave is what is referred to as its pitch.

A cube of side $10cm$ completely immersed in water experiences a buoyant force of_____(Take Density of water $\rho$ = $1000kg/m^3$, Acceleration due to gravity $g=10m/s^2$)

Which of the following statements are correct regarding waves?

Assertion(A): An electroscope can be used to find the nature of charge on a body.
Reason(R): It is based on the principle: electric charge can be transferred from a charged object to another body.

Match the following in most appropriate way:
$\begin{array}{cc}\text{Part of eye}& \text{Function}\\ \text{a) Iris}& \text{p) Converts the light into neural signals, and send}\\ & \text{these signals on to the brain for visual recognition.}\\ \text{b) Pupil}& \text{q) Primarily focuses and controls the entrance of}\\ & \text{light into the eye.}\\ \text{c) Convex lens}& \text{r) Regulates the amount of light reaching the retina.}\\ \text{d) Retina}& \text{s) Controls size of pupil and amount of light reaching}\\ & \text{the retina.}\\ \text{e) Cornea}& \text{t) Focuses light onto the retina and help the eye to}\\ & \text{focus on objects at different distances.}\end{array}$

A block is sliding along a horizontal surface. It comes to rest after sometime. Which force is responsible for stopping the block?

Which of the following are sources of noise pollution?

Pressure at the same level in a water tank is

Calculate the force required to generate the pressure of 3 kPa on 1000 cm² area.

A stone is dropped into a deep well and is heard to hit the water 2 s after being dropped. Determine the depth of the well assuming no time delay in stone hitting the water and sound being heard. Take acceleration due to gravity a= 10 $m{s}^{-2}$.

What is the grey line around the sun between mars and jupiter?

The density of air is 1.28 g/m. Express it in -

(I) g/cm^{​​​​​3}

2)kg/m^3

​​​​​

Which of the following statement is correct?

294 blue balls, 252 pink balls, and 210 yellow balls were distributed equally among some students with none left over. What is the biggest possible number of students?

Out of the following which is/are electrolytes:

What is the specific term used for the upper surface of underground water?

Bad taste and smell of stale food is because of:

Uranus appears to roll during it's orbital motion ??

How can you show that sound cannot travel through a vacuum? Draw a labelled diagram of the apparatus used.

Why do astronauts feel weightless in a satellite?

What is the pressure of the water column whose height=10CM density=20kg gravity=9.8

what is law of floatation how it is used in submarines

How does friction depends on the nature of the surfaces in contact??

The diagrams below show a V - Shaped object placed in different orientations. In which position does the object exert the maximum pressure on the surface it is resting?

Electroscope is an instrument which is used to detect the charge on a body. What is "A” in the following diagram shown below?

why pencil writing get erased

A stone is dropped in a well of depth 500 m and a sound is heard after 45/4 seconds. Then speed of sound is (if g= 10 m/s): x* 100 m/s. Find the value of x.

Why sliding friction is less than static friction?