Question
A pulse of light duration 10-5 s is absorbed
fully by a little object initially at rest. If the power of this pulse is 45 × 10-3 W, compute the final momentum of the object?Solution
The correct answer is A
A liquid of density ρ is rotating in a cylindrical vessel with constant angular velocity ω. The free surface of the liquid takes the shape of:
Two charges +4μC and +9μC are separated by 60 cm. Where should a third charge be placed so that it experiences zero net force? (from +4μC charge)
Kindly Study the following questions carefully and choose the right answer:
Transpiration is mainly effective during _______ ?
In blood, platelets are required for
Mycorrhiza is a symbiotic association between :
What is the velocity of light in a diamond if the refractive index of diamond with respect to vacuum is 2.5?
The device used for locating submerged objects under sea is –
What is the gravitational force on an object of mass 5 kg on Earth?
A metal ball of volume 0.02 m³ is immersed fully in water. Find buoyant force. (Take g=10 m/s2, ρ = 1000 kg/m3)
Which of the following is a process in which water from any source change into vapour state ‘due to heat’?
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