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_______ is the mass of one litre of pure water at 4-degree celsius.

A force of $100N$ is applied on a car through the hydraulic jack. The area of the base on which the car is resting is ​
$100m^2$ and the area of the effort side is $50m^2$. Find the force exerted on the car through the hydraulic press.​

Amit is 4 and half years old.Generally what will be the audible range of Amit?

The normal atmospheric force ( pressure) acts on all bodies, we know.

But then, why does the reading of a digital weight measurer in a grocery store shows zero when nothing is placed on it? It should show the normal atmospheric pressure.

Let's say a thief is running on a train with 12km/h. The police car is moving with 80km/h. If the speed of the train is 60km/h. What is the speed of thief with reference to police car?

State the positions of neutral points when a magnet is placed with its axis in the magnetic meridian and with its north pole

(i) pointing towards the geographic north,

(ii) pointing towards the geographic south.

To detect the obstacles in their path, bats produce :

(a) infrasonic waves (b) ultrasonic waves

(c) electromagnetic waves (d) radio waves.

When a potential difference is applied across the resistor, the path of an electron in the resistor is ___ .

A swing has a time period of 1.4 seconds. The no. of oscillations made by it within 1 minute 24 seconds will be:

Which of the following has the largest momentum?

A van covers the first 30 km in 30 min and the next 30 km in 40 min. Calculate the average speed for the entire journey.

The field inside a solenoid is ___ proportional to current.

A man is carrying a block of a certain substance (of density 1000 kgm-3) weighing 1 kg in his left hand and a bucket filled with water and weighing 10 kg in his right hand. He drops the block into the bucket. How much load does he carry in his right hand now

Which of the following graph shows the variation in the volume of 1 g of water with the temperature in the range from $0{}^{\circ }C$ to $10{}^{\circ }C$?

A van starting from rest moves with a uniform acceleration of $0.1m/s^2$ for 2 minutes. Find the speed acquired and the distance travelled?

What is the work done (in KJ) to increase the velocity of a car from 36 $\frac{km}{hr}$ to 90 $\frac{km}{hr}$? When the weight of the car is 1000 kg.

Which of the following is the speed of sound in copper and which in aluminium ?

(a) 5100 m/s

(b) 1500 m/s

(c) 3750 m/s

I want worksheet for magnetism chapter for practice

Match the following epithelial tissues with their location

$\begin{array}{cc}ColumnI& ColumnII\\ 1.\text{Squamous Simple Epithelial Tissue}& a.\text{Salivary Ducts}\\ 2.\text{Cuboidal Simple Epithelial Tissue}& b.\text{Skin}\\ 3.\text{Columnar Simple Epithelial Tissue}& c.\text{Bowman's Capsule}\\ 4.\text{Ciliated Columnar Simple Epithelial Tissue}& d.\text{Endometrium}\\ 5.\text{Keratinised Stratified Epithelium}& e.\text{Nostrils}\end{array}$

In a screw gauge zero of the head scale lies above the pitch scale axis, the zero error is:

A car travels with a uniform velocity of 25 $m{s}^{-1}$ for 5 s. The brakes are then applied and the car is uniformly retarded and comes to rest in further 10 s.Find:(i) the distance which the car travels before the brakes are applied,(ii) the retardation,and (iii) the distance travelled by the car after applying the brakes.

If velocity, time and force were chosen as basic quantities, find the dimensions of mass.

The atmospheric pressure at earth surface is $P_1$ and inside a mine is $P_2$. They are related as :
(a) $P_1=P_2$

(b) $P_1>P_2$
(c) $P_1<P_2$

(d) $P_2=0$

Explain the underlying principle and working of an electric generator by drawing a labelled diagram. What is the function of brushes? [5 MARKS]

The energy for each degree of freedom in thermal equilibrium is 1/2k_BT. This is

Calculate the force of gravitation between the earth and the sun, given that the mass of the earth = 6×10²⁴kg and of the sun = 2×10³⁰kg. The average distance between the two is 1.5×10¹¹m.

Which device is used in a circuit to vary the resistance continuously?

Imagine yesterday you left home at 6:30 am for your school after completing this journey of 3km you found that the school was closed and you came back to your home at 7:45am.find the distance and diapacement.

It is relatively easy to write on blotting paper or newspaper with an ink pen because of

Two resistors 4 Ω and 2 Ω are connected in series, and potential difference of 12 V is applied across the combination. Then, the current through the circuit is:

A hammer exerts a force of 1.5 N on each of the two nails A and B. The area of cross section of tip of nail A is 2 $m{m}^2$ while that of nail B is 6 $m{m}^2$. Calculate pressure on each nail in pascal.

If a person can jump to a height of 9m on the moon, the height to which he can jump on the earth with the same effort is:

Which of the following are unit(s) of distance?

When the pitch of note produced by a harmonium is lowered, then the wavelength of the note :

(a) decreases

(b) first decreases and then increases

(c) increases

(d) remains the same

A boy of mass 40 kg runs up a flight of 50 steps, each of 10 cm high in 5 seconds. Find the power developed by the boy?

A simple pendulum hangs from the roof of train. The string is inclined towards the rear of the train. What is the nature of motion of the train?

The focal length of a convex lens is $20cm$, the focal length of the concave mirror is $30cm$. And the separation between lens and mirror is $90cm$. If the object is placed $60cm$ before the lens, find out the position of an image formed by the concave mirror?

The action and reaction when a person is walking on the floor are

Atoms of an element having same atomic number but different mass numbers are called _______________.