Assuming constant acceleration due to gravity of
, and assuming the passengers start at rest, so that
, we have
![v=v_0+at\implies v=\left(9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)(5.5\,\mathrm s)=53.9\,\dfrac{\mathrm m}{\mathrm s}](https://tex.z-dn.net/?f=v%3Dv_0%2Bat%5Cimplies%20v%3D%5Cleft%289.8%5C%2C%5Cdfrac%7B%5Cmathrm%20m%7D%7B%5Cmathrm%20s%5E2%7D%5Cright%29%285.5%5C%2C%5Cmathrm%20s%29%3D53.9%5C%2C%5Cdfrac%7B%5Cmathrm%20m%7D%7B%5Cmathrm%20s%7D)
or 54 m/s if taking significant digits into account.
The length of the side of the cube is 4 cm
Explanation:
The density of the cube is given by:
![\rho=\frac{m}{V}](https://tex.z-dn.net/?f=%5Crho%3D%5Cfrac%7Bm%7D%7BV%7D)
where
m is the mass of the cube
V is its volume
Also, the volume of the cube is given by
(2)
where L is the length of each side.
For the cube in this problem we have:
m = 128 g
![\rho=2 g/cm^3](https://tex.z-dn.net/?f=%5Crho%3D2%20g%2Fcm%5E3)
From the first equation, we find the volume of the cube:
![V=\frac{m}{\rho}=\frac{128}{2}=64 cm^3](https://tex.z-dn.net/?f=V%3D%5Cfrac%7Bm%7D%7B%5Crho%7D%3D%5Cfrac%7B128%7D%7B2%7D%3D64%20cm%5E3)
And now we use eq.(2) to find the length of the side:
![L=\sqrt[3]{V}=\sqrt[3]{64}=4 cm](https://tex.z-dn.net/?f=L%3D%5Csqrt%5B3%5D%7BV%7D%3D%5Csqrt%5B3%5D%7B64%7D%3D4%20cm)
Learn more about density:
brainly.com/question/5055270
brainly.com/question/8441651
#LearnwithBrainly
For the answer to the question above, let us first start with relaxation time. it is the absence of an external electric field, the free electrons in a metallic substance will move in random directions so that the resultant velocity of free electrons in any direction is equal to zero. While the Collision time it is<span> the mean </span>time<span> required for the direction of motion of an individual type particle to deviate through approximately as a consequence of </span>collisions<span> with particles of type.</span>
Answer:
Gamma rays
Explanation:
Gamma rays is at the end of the electromagnetic spectrum, and has the highest energy. It propagates through space at 3x10^8 m/s and has the smallest wavelength and the highest frequency. It is given off by atoms of element as they undergo nuclear disintegration.
Answer:
All of the following are true EXCEPT, the angle of refraction is 30 degrees
Explanation:
It is given that,
The index of refraction of the water is 1.33 and the angle of incidence is 30 degrees. We know that when a ray of white light moves through the air and strikes the surface of water in a beaker, refraction occurs. Let r is the angle of refraction. It can be calculated using Snell's law as :
![n=\dfrac{sin\ i}{sin\ r}](https://tex.z-dn.net/?f=n%3D%5Cdfrac%7Bsin%5C%20i%7D%7Bsin%5C%20r%7D)
![sin\ r=\dfrac{sin\ i}{n}](https://tex.z-dn.net/?f=sin%5C%20r%3D%5Cdfrac%7Bsin%5C%20i%7D%7Bn%7D)
![r=22.08^{\circ}](https://tex.z-dn.net/?f=r%3D22.08%5E%7B%5Ccirc%7D)
So, the angle of refraction is 22.08 degrees.
According to the law of reflection, the angle of incidence is equal to the angle of reflection. Since, it is incident at an angle of 30 degrees, so the angle of reflection will be 30 degrees. Also, total internal reflection will result, depending on the critical angle.
So, the wrong statement is the angle of refraction is 30 degrees. It is equal to 22.08 degrees.