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Convert ${100}^{\circ }F$ to Celsius scale.

What is a lightning conductor? How does it work?

Write a short note on: [2 MARKS]
(i) Conductivity
(ii) Resistivity

Suppose you apply a force of 5 Newton parallel to a wall. What will be the thrust.

If a ray of light falls along the normal of a plane mirror, then the light ray will reflect back at an angle of ___degrees.

Which of the following measures will not help in reducing noise pollution?

Identify the correct option that takes place during a Lightning.

The SI unit of momentum is:

Explain electroplating with chemical equations.

Choose the substance that is used to make the filament of an electric bulb?

Angle of incidence = angle of ___

What causes the seperation of charges during a thunderstorm? [2 MARKS]

Raj checked his weight on an analog weighing machine and found out it was $62kg$. After stepping down, he realized that the needle pointed at $3kg$ instead of $0$. The reading on the weighing machine without the zero error would have been ___kg.

How do we locate the star Sirius with the help of constellation Orion?

The small celestial objects, known as meteors, burn out as they enter the Earth's atmosphere. The meteors heat up on entering the Earth's atmosphere because

A pressure of $10kPa$ acts on an area of $0.3m^2$. The force acting on the area will be ________.

The image formed by the eye lens on the retina is:

A bus starts from the stop and takes $50$ seconds to attain the speed of $10m/s$. If the mass of the bus along with the passengers is $10000kg$, the force applied (in N) by the engine of the bus to attain the speed of $10m/s$ is ___ N.

The elephant weighs 20,000 N stands on one foot of area $1000c{m}^2$. How much pressure would it exert on the ground?

Different substances carry _____.

Velocity of an object can be changed by

Which planet is named after the Roman goddess of love?

The same amount of pressure is applied to two flat surfaces with different surface areas. In this scenario which of the following statements is correct?

Consider the situatuion shown in figure. A plane mirror is fixed at a height h above the bottom of a beaker containing water (refractive index $\mu$ ) up to a height d. Find the position of the image of the bottom formed by the mirror.

Ram has an LED of resistance 10$\Omega$ which will only light up if the current provided is 1A. Below 1A current it won't light up, above that the LED will burst. He also has 10 two volt cells. Find out how many cells will Ram need to light up the LED?

Answer the following questions :

A. Using a horizontal force of 200 N, we are moving a wooden cabinet across a floor at a constant velocity. What is the friction force that is being exerted on the cabinet?

B. Ram's bike is moving with a speed of 90 km/hr. In traffic he had to reduce his speed to 30 Km/hr. By how much will the force of friction change? [3 MARKS]

Which of the following steps are involved in carbon dioxide cycle?

Name one solid, one liquid and one gas through which sound can travel.

Define pressure and how it is related to force and area and give it's SI unit also.

What is torque?

What would have happened if nuclear forces were to exist on a larger scale

Patient suffering patient suffering from high fever is advised to put wet cloth stripes on his forehead. Why

A sharp pin works better than a blunt pin. Explain the reason.

Q5. Consider the following statements about Seeker Technology in Brahmos:

1. Seeker determines the accuracy of a missile.

2. Supersonic cruise missile BrahMos was successfully flight-tested for the first time with an indigenous seeker.

Which of the statements are correct?

A piece of wood having dimensions $1m\times 2m\times 3m$ and $2kg$ mass. What is the density of wood? Would the wood float in water? ($d_{water}=1000kg/m^3$)

Which of the following is not true?

Ramesh, an ice cream seller, uses the container shown in the given figure to freeze ice creams. He gets an order for 700 ice creams.

The density of ice is 0.9167 g/cm³. (Use π = ²²/₇)

What quantity of ice cream should he freeze in order to complete the order?