Be Master in Physics: Expert Solutions & Tips - Page 13

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Physics

Recent questions in Physics

Zachariah Mcmillan 2023-01-16

If an object is accelerating, can the net force acting on it ever be zero?

Bradley Collier 2023-01-16

What are two kinds of electricity?

Irene Carter 2023-01-15

How much would a $70 k g$ man weigh on the moon? What would be his weight on the Earth and on the moon? (Acceleration due to gravity of moon = $1.63 m / s^{2}$ )

Arianna Pruitt 2023-01-14

If the speed of light is $3 x 10^{8}$ m/s and the sun's distance from the earth is 93 million miles. Calculate the time it takes the sunlight to reach the earth. Report your results in seconds and in minutes.

cebollablogscd 2023-01-14

What is monochromatic radiation?

Keely Rivers 2023-01-14

The electric field of a radio wave is given by $\vec{E} = E_{0} \sin (k z - ω t) (\hat{i} + \hat{j})$ . Give a unit vector in the direction of the magnetic field at a place and time where $\sin (k z - ω t)$ is positive.

mierekaslq 2023-01-14

Why can only electrons move and get transferred? Why not protons?

Kason Wong 2023-01-14

Suppose one millikans oil drop contains $- 4.8 \cdot 10$ to the power -19 . How excess electrons are present in one such drop?

animeagan0o8 2023-01-13

Light waves travel faster than sound waves.
A. Shrillness
B. pitch

Sloane Cummings 2023-01-13

A sound is travelling in air at a speed of $343 m s^{- 1}$ . The wavelength of the sound wave is 0.1 cm. Find the frequency of the sound wave.
A)543000 Hz
B)343000 Hz
C)400000 Hz
D)633000 Hz

bandel2m5 2023-01-12

A projectile is fired horizontally from a gun that is 45.0 m above flat ground, it emerges from the gun with a speed of 500 m/s. (take, g = −10 m/s^2). Column - I Column - II (i) Time of flight of Projectile in s (x) 3 (ii) Horizontal distance covered by projectile in m (y) 30 (iii) Magnitude of vertical component of velocity in m/s as it strikes ground (z) 1500
(i) - (x); (ii) - (z); (iii) - (y)
(i) - (y); (ii) - (x); (iii) - (z)
(i) - (x); (ii) - (y); (iii) - (z)
(i) - (z); (ii) - (x); (iii) - (y)

Marcus Frank 2023-01-12

The speed of light in water and glass is $2.2 \times 10^{8}$ m/s and $2 \times 10^{8}$ m/s, respectively. What is the refractive index of glass with respect to water?

Savanne1bo 2023-01-12

What is range of wavelength of light which humans can see?

Savanne1bo 2023-01-12

The speed of the yellow light in a certain liquid is $2.4 \times 10^{8} m . s^{- 1}$ . Find the refractive index of the liquid.

Bradley Collier 2023-01-11

The sound wave travel fastest in
A. solids
B. gases
C. vacuum
D. liquids

Draven Crane 2023-01-10

A copper wire of diameter 1.6 mm carries a current of 20 A. Find the maximum magnitude of the magnetic field $\vec{B}$ due to this current.

Goldwaagefhu 2023-01-10

Why are objects weightless, when they are in free fall ?

Raina Cole 2023-01-09

What device converts AC to DC?

Audrina Graham 2023-01-09

On what factors does the magnitude of induced EMF in a coil depends?

Savanne1bo 2023-01-09

At what temperature on the Kelvin scale does liquid nitrogen boil?

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