Answer:
<em>4.61 N</em>
<em></em>
Explanation:
masa = 0.5 kg
ángulo de inclinación = 20°
Peso normal de la masa = mg
donde m = masa
g = aceleración debido a la gravedad = 9.81 m/s^2
Peso normal = 0.5 x 9.81 = 4.905 N
Si la masa se mantiene en su lugar mediante una cuerda paralela al plano, y no hay fricción en la masa, entonces
La fuerza sobre la cuerda = peso normal x cos ∅
donde ∅ = 20 °
La fuerza sobre la cuerda = 4.905 x cos 20°
==><em> 4.61 N</em>
If the climber is not accelerating then a=0. Then F=ma=0. This is because the upward force of the rope is equal and opposite to the force due to gravity. So the net (total) force is 0
Answer:
We say that the object's spectrum is shifted.
Explanation:
Spectral lines will be shifted to the blue part of the spectrum1 if the source of the observed light is moving toward the observer, or to the red part of the spectrum when is moving away from the observer (that is known as the Doppler effect).
That shift can be used to find the velocity of the object by means of the Doppler velocity.
(1)
Where is the wavelength shift, is the wavelength at rest, v is the velocity of the source and c is the speed of light.
Answer:
P = 2.91*10^{-24} kg m/s
size of atom hat lie in range of 1 to 5 Angstrom
Angstrom
Explanation:
A) MOMENTUM
p = mv
where m is mass of electron
so momentum p can be calculated as
p = 9.11*10^{-31} *3.2*10^{6}
P = 2.91*10^{-24} kg m/s
b) wavelength
where h is plank constant
so
c) size of atom hat lie in range of 1 to 5 Angstrom
d) from the information given in the question we have
we know that
[]
Angstrom