NCERT Exemplar Class 11
In figure, what be the sign of the velocity of the point P’, which is the projection of the velocity of the reference particle P.P is moving in a circle of radius R in anti-clockwise direction.
12
Nov
In figure, what be the sign of the velocity of the point P’, which is the projection of the velocity of the reference particle P.P is moving in a circle of radius R in anti-clockwise direction. In figure what be the sign of the velocity of the point P' which is the projection of the [...]
What is the ratio between the distance travelled by the oscillator in one time period and amplitude?
12
Nov
What is the ratio between the distance travelled by the oscillator in one time period and amplitude? What is the ratio between the distance travelled by the oscillator in one time period and amplitude? November 12, 2020 Category: Chapter 13 - Oscillations , NCERT Exemplar Class 11 , Physics ,
What is the ratio of maximum resistance to the maximum velocity of a simple harmonic oscillator ?
12
Nov
What is the ratio of maximum resistance to the maximum velocity of a simple harmonic oscillator ? What is the ratio of maximum resistance to the maximum velocity of a simple harmonic oscillator ? November 12, 2020 Category: Chapter 13 - Oscillations , NCERT Exemplar Class 11 , Physics ,
When will the motion of a simple pendulum be simple harmonic?
12
Nov
When will the motion of a simple pendulum be simple harmonic? When will the motion of a simple pendulum be simple harmonic? November 12, 2020 Category: Chapter 13 - Oscillations , NCERT Exemplar Class 11 , Physics ,
The surface tension and vapour pressure of water at 20∘C is 7.28×10^−2 Nm^−1 and 2.33×10^3Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20^∘C?
12
Nov
The surface tension and vapour pressure of water at 20∘C is 7.28×10^−2 Nm^−1 and 2.33×10^3Pa, respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20^∘C? respectively. What is the radius of the smallest spherical water droplet which can form without evaporating at 20^∘C? The surface tension and [...]
Two mercury droplets of radii 0.1 cm and 0.2 cm collapse into one single drop. What amount of energy is released? The surface tension of mercury S=435.5×10^−3Nm^−1
12
Nov
Two mercury droplets of radii 0.1 cm and 0.2 cm collapse into one single drop. What amount of energy is released? The surface tension of mercury S=435.5×10^−3Nm^−1 Two mercury droplets of radii 0.1 cm and 0.2 cm collapse into one single drop. What amount of energy is released? The surface tension of mercury S=435.5×10^−3Nm^−1 November [...]
The sap in trees, which consists mainly of water in summer, rises in a system of capillaries of radius r=2.5×10^−5 m. The surface tension of sap is S=7.28×10^−3 Nm^−1 and the angle of contact is 0^∘. Does surface tension alone account for the supply of water to the top of all tress ?
12
Nov
The sap in trees, which consists mainly of water in summer, rises in a system of capillaries of radius r=2.5×10^−5 m. The surface tension of sap is S=7.28×10^−3 Nm^−1 and the angle of contact is 0^∘. Does surface tension alone account for the supply of water to the top of all tress ? Iceberg floats [...]
A cubical block of density ρ is floating on the surface of water. Out of its height L, fraction x is submerged in water. The vessel is in an elevator accelerating upward with acceleration a . What is the fraction immersed?
12
Nov
A cubical block of density ρ is floating on the surface of water. Out of its height L, fraction x is submerged in water. The vessel is in an elevator accelerating upward with acceleration a . What is the fraction immersed? A cubical block of density ρ is floating on the surface of water. Out [...]
On complete combustion, a liter of petrol gives off heat equivalent to 3×10^7 J. In a test drive a car weighing 1200 kg including the mass of driver, runs 15 km per liter while moving with uniform speed on a straight track. Assuming that friction offered by the road surface and air to be uniform. calculate the force of friction acting on the car during the drive, if the efficiency of the car engine were =0.5.
09
Nov
On complete combustion, a liter of petrol gives off heat equivalent to 3×10^7 J. In a test drive a car weighing 1200 kg including the mass of driver, runs 15 km per liter while moving with uniform speed on a straight track. Assuming that friction offered by the road surface and air to be uniform. [...]
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a liter of petrol gives off heat equivalent to 3×10^7 J. In a test drive a car weighing 1200 kg including the mass of driver ,
On complete combustion ,
one gradual and the other steep meet at A from where two stones are allowed to slide down from rest ,
one on each tracks as shown in figure. Which of the following statements is correct? ,
Two inclined frictionless tracks ,
An adult weighing 600N raises the centre of gravity of his body by 0.25m while taking each step of 1m length in jogging. If he jogs for 6km, calculate the energy utilised by him in jogging assuming that there is no energy loss dur to friction of ground and air. Assuming that the body of the adult is capable of converting 10% of energy intake in the form of food, calculate the energy equivalent of food that would be required to compensate energy utilised for jogging.
09
Nov
An adult weighing 600N raises the centre of gravity of his body by 0.25m while taking each step of 1m length in jogging. If he jogs for 6km, calculate the energy utilised by him in jogging assuming that there is no energy loss dur to friction of ground and air. Assuming that the body of [...]
Tags:
An adult weighing 600N raises the centre of gravity of his body by 0.25m while taking each step of 1m length in jogging. If he jogs for 6km ,
one gradual and the other steep meet at A from where two stones are allowed to slide down from rest ,
one on each tracks as shown in figure. Which of the following statements is correct? ,
Two inclined frictionless tracks ,