Answer:
T = (3μmg - Fcosθ)/2
Explanation:
Since the boxes move to the right, the net force on box of mass 2m is
Fcosθ - 2μmg + T = ma (1)where Fcosθ = horizontal component of applied force, 2μmg = frictional force and T = tension in string and a = acceleration of box
The net force on the box with mass m is
μmg - T = ma (2) where μmg = frictional force, T = tension and a = acceleration of boxes.
Equating (1) and (2) we have
Fcosθ - 2μmg + T = μmg - T
collecting like terms
Fcosθ - 2μmg - μmg = -T - T
Fcosθ - 3μmg = -2T
(3μmg - Fcosθ)/2 = T
T = (3μmg - Fcosθ)/2
26. D. crushing the sugar cube and dissolving it in water.
27. A. atom
28. B. molecule
29. B. plum pudding model of Joseph John Thomson
30. B. He used cathode ray tubes which showed that all atoms contain tiny negatively charged subatomic particles or electrons.
31. D. protons and neutrons are relatively heavier than electrons.
λ = 2 m.
The easiest way to solve this problem is using the equation of frecuency of a wave f = v/λ, where v is the velocity of the wave, and λ is the wavelength.
To calculate the wavelength of a microwave light travels through a liquid, it moves at a speed of 2.2 x 10⁸ m/s. If the frecuency of the light wave is 1.1 x 10⁸ Hz, we have to clear λ from the equation f = v/λ:
f = v/λ -------> λ = v/f
λ = 2.2 x 10⁸ m/s / 1.1 x 10⁸ Hz
λ = 2 m (wavelength of the microwave)
The answer OC. It can be changed only if all scientists approve the change
Answer:
inversion would be going toward or inside internal and eversion is going outside or external
