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The ratio of the speed of a tiger and a lion is 4:3, respectively. If the lion covers a certain distance in 12 hours, then what will be the time taken (in hours) by the tiger to cover double of the same distance?

Explain the role of anomalous expansion of water in the sustenance of aquatic life in cold places? [3 MARKS]

Explain why a charged balloon is repelled by another similarly charged balloon whereas an uncharged balloon is attracted by another charged balloon?

What is the role of gravitational force in convection?

A pendulum takes 50s to complete 25 oscillations. Then the time period of oscillation is:

A cyclone is also called as ________in the American continent.

if a metalic sphere gets cooled from 67C to 50c in 10 minute and in the next to cooled 42 C then the tempersture of the surroundings s

An electrician uses rubber or plastic gloves while repairing an electric switch at home because:

A

Question 8A brick is kept in three different ways on a table as shown in Fig. The pressure exerted by the brick on the table will be(a) maximum in position A(b) maximum in position B(c) maximum in position C(d) equal in all cases

Filament of a bulb is made up of:

A child walks towards a fixed plane mirror at a speed of 5 km h−1. The velocity of the image with respect to mirror is -

Bats can hunt at night. Which of the following properties of sound is used?

A cuboid shaped container has volume (4xy^5z^5 – 20x^2y^3z^3 + 25x^3yz) cu. metres and height (2y^2z^2 – 5x) m. Find the area of the base of the cuboidal container.

instantaA person moves 30 m north, then 20 m east and then 30/2 m south-west. His displacement from the origin position is

The fully shaded region or the darker region of a shadow is called_______

Question 04 State the laws of reflection.

Choose the correct battery representation (from the end X to the end Y) for the circuit in which three bulbs A, B and C are connected as shown.

Find the charge of 48 gram of MG 2 + ions in coulomb

Riaz needs a box which can absorb heat from the sun very fast but lose it very slowly. How should the outer and the inner surfaces of the box be coloured so that he gets the best result?

A man swims to and fro along the bank of a river with speed v relative to water. if velocity of flow is u than average speed of the man in to and fro motion is ?

a pendulum bob has a speed 3m/s while passinf through its lowest position , length of the pendulum is 0.5m then its speed when it makes an angle of 60^{0 with the vertical is ; 2m/s 1 m/s 4m/s 3m/s

A rabbit covers a distance of 30 feet by walk and then runs with the speed of 2 feet per second for (t) seconds .frame a algebraic expression for the total distance covered by the rabbit .

The temperature coefficient of resistance of a wire is 0.00125 /∘C. At 300 K its resistance is 1 ohm. The temperature at which the resistance becomes 2 ohm is:

71. Upper and lower half of a thin convex lens are having focal length f and 2f . A point object o is on the principle axis at a large distance from lens. No of images formed by lens on PA is

what is convection?

A wire of length L, area of cross-section A is hanging from a fixed support. The length of the wire becomes 1.1L when a mass M is suspended from its free end. The Young's modulus of wire is given by

44. A small ball collides with a massive wall, head-on. If the initial speed of ball is 10 m/s andcoefficient of restitution is 0.2, then the finalspeed of ball will be(1) 4 m/s(2) 1 m/s(3) 2 m/s(4) Zero1 m/s his kinetic energy

Two charges 10 microcoulomb and -10 microcoulomb are placed at points A and B separated by a distance of 10 cm. Find the electric field at a point P on the perpendicular bisector of AB at a distance of 12 cm from it's middle point.

Question 4Point (-10, 0) liesA) On the negative direction of the x-axisB) On the negative direction of the y-axisC) In the third quadrant​​​​​​​D)​​​​​​​ In the fourth quadrant

if the temperature of the sun is doubledthen the energy received by the earth will be how many times?

Question 8 (b)Name the type of mirror used in the given situation.Side/rear-view mirror of a vehicleSupport your answer with reason.

A body moves at a speed of 20 km/hr for the first 2 hours then it moves at the speed of 30 km/hr for the next 1 hour. What is the total distance travelled by the body?

How much water is stored in the beaker shown in the figure?

define electric potential energy difference between any two points. also give the expression to find the same.

A car decelerates uniformly from velocity v1 to velocity v2 while getting displaced by s. If the diameter of the wheel is d, the angular acceleration of the wheel is

Two wires having resis†an ces R and 2R are connected in parallel, then ratio of heat generated in R and 2R is

Which of the following is NOT a magnetic material?

6.A farmer move along the boundary of square fild of side 10m in 40s . What will be magnitude of displacement of the farmer at the end of 2min 20sec from his initial position

Why cannot we hear any sound outside a cinema hall whole the show is on?

Which of the following correctly represents a battery?

The moon is observed from two diametrically extremes A and B on earth. The angle of parallax is found to be 1° 54'. If the diameter of the earth is about 1.276 * 10^7 m , estimate the distance of the moon from the earth.

What means kinematics?

From where did the word thermometer come

Why does the total resistivity in parallel combination less than the least resistivity

Question 16Why is there a need to harness non-conventional sources of energy? Give two main reasons.

Choose the correct statement:

Question 4Point (-10, 0) liesA) On the negative direction of the x-axisB) On the negative direction of the y-axisC) In the third quadrantD) In the fourth quadrant