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After holding a pack of ice in your hand for some time, put your hand now in water at a normal temperature. Your hand would now feel ___ .(hotter/colder)

The following is the distance-time graph of Amit's walking.

Study the above graph carefully and answer the questions given below:
(i) When does Amit make the least progress? Explain your answer.
(ii) Find his average speed in km/hr.

A $5\text{V}$ battery is connected across the points $\text{X}$ and $\text{Y}$. Assume ${\text{D}}_1$ and ${\text{D}}_2$ to be normal silicon diodes. Find the current supplied by the battery if the positive terminal of the battery is connected to point $X$.

The variation of the velocity of a particle moving along a straight line in a certain time interval is shown below. What is the distance travelled during acceleration?

There are two boxes A & B. Cell phones are kept in both the boxes, all air is sucked from box A which is then closed. While box B is simply closed without sucking air from it. A call is made simultaneously on both the phones, but sound comes only from box B. This is because:

Statement 1: In box B there are air particles to vibrate but in box A there is a vacuum.
Statement 2: Sound needs a medium for propagation.

When the white light is thrown on a body that absorbs all the wavelengths of the visible spectrum, how will it appear to human eyes ?

The velocity-time graph of a body with constant acceleration is:

A body of mass m is taken to moon. Then

A motion that repeats itself after equal intervals of time is known as __________.

Identify the correct mirror half of the shown image.

The angle made by the moon on an astronomical telescope is $0.1\text{rad}$. Focal length of objective and eyepiece of the telescope are $10\text{cm}$ and $5\text{cm}$ respectively. Find the angle subtended by final image on the eyepiece in case of normal adjustment.

104 degree fahrenheit is equal to ___ degree celsius.

What does a $5A$ rating on a fuse mean?

Boiling point is a ________ phenomena, while evaporation is a __________ phenomena.

Why is a layer of zinc-coated over iron?

Which of the following ways will NOT cause a magnet to lose its magnetism?

1. 74.64

Give reasons.

(a) Ordinarily, an atom does not have any charge.

(b) Charge cannot be developed on a copper rod.

(c) An iron chain hangs down from the body of a petrol tanker.

A fly was sitting on a block. A man draws a circle of area ${2cm}^2$, thus enclosing the fly. He then applies a force of 20N and kills it with a flat stick. Calculate the pressure on that area.

Rohit was sitting beside the window when he saw a lightning. He started his stopwatch and found that after 22 seconds of lightning its thunder was heard. Given, Speed of light = 3 x ${10}^8$ $\frac{m}{s}$ and Speed of sound = $340\frac{m}{s}$.

How far are the source of thunder from Rohit?

Difference between cyclone and tornado is

Water enters through one end of a horizontal pipe of non-uniform cross-section with a velocity of $0.4\text{m/s}$ and leaves the other end with a velocity $0.6\text{m/s}$. The pressure of water at the entry point is $1500{\text{N/m}}^2$. What is the pressure at the exit point? (Density of water $=1.0\times {10}^3{\text{kg/m}}^3)$

The acceleration of a particle
increasing linearly with time t is 'bt'. The particle starts from the origin
with an initial velocity v₀. The distance travelled by the particle
in time t will be

In YDSE, two slits have width in ratio $1:36$, then ratio of maximum intensity to minimum intensity on screen is

A lightning stroke is so strong that it can destroy life and property. Select the safety measure(s) to be taken to protect ourselves.

1. 2

1 hour 30 minutes is equal to how many seconds?

name any two units used for measuring heat enegy

Which of the following can be source of electric current in a circuit?