Doors of a dam are 20m below the surface of water in the dam. If one door is opened what will be the speed of the water that flows out of the door ?
The given can be listed as, h= 20m g = 9.8m/s² To find, v = ? Solution -��…
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Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of the resistance?
we can list out the given as, Power P= 100W current , I = 3A To find , Resistance R …
The mass of the earth is 6 x 10²⁴ kg. The distance between the earth and the Sun is 1.5x 10¹¹ m. If the gravitational force between the two is 3.5 x 10²² N, what is the mass of the Sun?
the given can be listed as mass of earth , m = 6 x 10²⁴ kg. distance between sun and…
The masses of the earth and moon are 6 x 10²⁴ kg and 7.4x10²² kg, respectively. The distance between them is 3.84 x 10⁵ km. Calculate the gravitational force of attraction between the two?
the data can be listed as mass of earth , M = 6 x 10²⁴ kg mass of moon , m = 7.4 x 10²…
A ball falls off a table and reaches the ground in 1s. Assuming g = 10 m/s², calculate its speed on reaching the ground and the height of the table.
we can list the given data as, initial velocity , u = 0m/s time t = 1s g = 10m/s² To f…
An object thrown vertically upwards reaches a height of 500 m. What was its initial velocity? How long will the object take to come back to the earth? Assume g = 10 m/s²
We can list the data as, height covered or distance covered, s = 500m g = 10m/s² To fi…
The mass and weight of an object on earth are 5 kg and 49 N respectively. What will be their values on the moon? Assume that the acceleration due to gravity on the moon is 1/6th of that on the earth.
As per the given data, we can list the data as, mass on earth , m = 5kg Weight on ear…
The radius of planet A is half the radius of planet B. If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A?
As per the question we can list the data as To find - Solution - Using the formula …
An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?
The given in the question can be listed as time t = 5s height h = 5m initial velocity…
Distinguish between elasticity and plasticity
ELASTICITY The property by which a body regains is original shape and size after remov…
A girl stands 170 m away from a high wall and claps her hands at a steady rate so that each clap coincides with the echo of the one before. a) If she makes 60 claps in 1 minute, what value should be the speed of sound in air? b) Now, she moves to another location and finds that she should now make 45 claps in 1 minute to coincide with successive echoes. Calculate her distance for the new position from the wall.
As per the given condition in the question we can list some data as, distance d = 170 …
An echo-sounder in a fishing boat receives an echo from a shoal of fish 0.45 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal?
The data that can be listed from the sum given are, speed v= 1500 m/s time in which th…
A tuning fork of frequency 170 Hz produces sound waves of wavelength 2 m. Calculate speed of sound.
As per the question the given data is, frequency n = 170Hz wavelength λ = 2m To find …
A certain sound wave in air has a speed 340 m/s and wavelength 1.7 m for this wave, calculate a) the frequency b) the period.
As per the given question we can list the data as velocity v= 340m/s wavelength λ = 1.…
HSC Maharashtra Results on 3 August 2021 at 4pm
The Maharashtra State Board of Secondary & Higher Secondary Education will declare…
HSC Results of Maharashtra 2021
There is lot of news going viral about 12th result being declared today, but remembe…
SSC Results on 16th July
SSC result of Maharashtra State will be declared tomorrow i.e 16th July 2021 at 1pm on…
Postulates of Kinetic Theory of Gases
🍁 A gas consists of large number of tiny particles called molecules. Volume occupied …
Calculate the viscous force acting on a rain drop of diameter 1 mm, falling with a uniform velocity 2 m/s through air. The coefficient of viscosity of air is 1.8 × 10^-5 Ns/m².
As per the question we can list some data as, diameter d = 1mm velocity v…
A light bulb is rated 100W for 220 V AC supply of 50 Hz. Calculate (a) resistance of the bulb. (b) the rms current through the bulb.
the given can be listed as Power P = 100W To Find , Resistance R = ? …