D. A solution because it dissolves when mixed with water
Answer:A, you would weigh the same on both planets because their masses and the distance to their centers of gravity are the same
Explanation:
Answer:
The correct answer is "4.26 m".
Explanation:
Given:
Wavelength,
![\lambda = 436.1 \ nm](https://tex.z-dn.net/?f=%5Clambda%20%3D%20436.1%20%5C%20nm)
or,
![=436.1\times 10^{-9} \ m](https://tex.z-dn.net/?f=%3D436.1%5Ctimes%2010%5E%7B-9%7D%20%5C%20m)
Distance,
![d = 0.31 \ mm](https://tex.z-dn.net/?f=d%20%3D%200.31%20%5C%20mm)
or,
![=0.31\times 10^{-3} \ m](https://tex.z-dn.net/?f=%3D0.31%5Ctimes%2010%5E%7B-3%7D%20%5C%20m)
Distance between the 1st and 2nd dark fringes,
As we know,
⇒ ![\frac{d}{L} (y_2-y_1) = \lambda](https://tex.z-dn.net/?f=%5Cfrac%7Bd%7D%7BL%7D%20%28y_2-y_1%29%20%3D%20%5Clambda)
or,
⇒ ![L=\frac{d(y_2-y_1)}{\lambda}](https://tex.z-dn.net/?f=L%3D%5Cfrac%7Bd%28y_2-y_1%29%7D%7B%5Clambda%7D)
By substituting the values, we get
![=\frac{0.31\times 6\times 10^{-6}}{436.1\times 10^{-9}}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B0.31%5Ctimes%206%5Ctimes%2010%5E%7B-6%7D%7D%7B436.1%5Ctimes%2010%5E%7B-9%7D%7D)
![=\frac{0.31\times 6\times 10^3}{436.1}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B0.31%5Ctimes%206%5Ctimes%2010%5E3%7D%7B436.1%7D)
![=\frac{1860}{436.1}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1860%7D%7B436.1%7D)
![=4.26 \ m](https://tex.z-dn.net/?f=%3D4.26%20%5C%20m)
Answer:
1543 J
Explanation:
The work done by a force when moving an object is given by the equation:
![W=Fd cos \theta](https://tex.z-dn.net/?f=W%3DFd%20cos%20%5Ctheta)
where:
F is the magnitude of the force applied on the object
d is the displacement of the object
is the angle between the direction of the force and of the displacement
For the cart pushed in this problem, we have:
is the force applied by the man
is the displacement of the cart
is the angle between the directions of the force and of the displacement
Solving for W, we find the work:
![W=(120)(20)(cos 50^{\circ})=1543 J](https://tex.z-dn.net/?f=W%3D%28120%29%2820%29%28cos%2050%5E%7B%5Ccirc%7D%29%3D1543%20J)