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### Opening of floral buds into flowers is a type of

Opening of floral buds into flowers, is a type of

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(a) autonomic movement of variation (b) paratonic movement of growth (c) autonomic movement of growth (d) autonomic movement of locomotion.

### Assuming the sun to have a spherical outer surface of radius r

Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature t⁰C, the power received by a unit surface, (normal to the inicident rays) at a distance […]

### If the cold junction of a thermo-couple is kept at 0⁰C and the hot junction is kept

If the cold junction of a thermo-couple is kept at 0⁰C and the hot junction is kept at T⁰C then the relation between neutral temperature (Tₙ) and temperature of inversion (Ti) is

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(a) […]

### A particle executes simple harmonic oscillations with an amplitude

A particle executes simple harmonic oscillations with an amplitude a. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

### The phase difference between the instantaneous velocity and acceleration of a particle

The phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is

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(a) π (b) 0.707π (c) zero (d) 0.5π

0.5π

Explanation:

Let y = […]

### The particle executing simple harmonic motion has a kinetic energy K₀cos²ωt.

The particle executing simple harmonic motion has a kinetic energy K₀ cos²ωt. The maximum values of the potential energy and the total energy are respectively

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(a) K₀/2 and K₀ (b) K₀ and […]

### A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed

A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radian) of

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(a) 10 […]

### A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00

A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radian) of

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(a) […]

### In a mass spectrometer used for measuring the masses of ions, the ions

In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular path of radius R using a magnetic field […]

### Which of the following anions is present in the chain structure of silicates

Which of the following anions is present in the chain structure of silicates

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(a) (Si₂O₅²⁻)n (b) (SiO₃)n²⁻n (c) SiO₄⁴⁻ (d) Si₂O₇⁶⁻