Answer:
Explanation:
Given that
There's a change in friction from 440 kJ to 110 kJ
This change is as a result of conversion of energy. The energy of the car system converted the mechanical energy in it, into a corresponding heat energy. During the course of this conversion, is where a whopping 330 kJ of energy went missing.
The 330 kJ of energy was lost as a result of the conversion of mechanical energy into heat energy by the use of friction.
In this question a lot of information's are provided. Among the information's provided one information and that is the time of 4 seconds is not required for calculating the answer. Only the other information's are required.
Mass of the block that is sliding = 5.00 kg
Distance for which the block slides = 10 meters/second
Then we already know that
Momentum = Mass * Distance travelled
= (5 * 10) Kg m/s
= 50 kg m/s
So the magnitude of the blocks momentum is 50 kg m/s. The correct option among all the given options is option "b".
Answer:
4.4 m/s
Explanation:
momentum is always conserved so we can use conversation of momentum to solve the question, also momentum is a vector quantity ( it has magnitude and direction) which is the product of the bodies mass and velocity.
conservation law of momentum relates by the formula below:
momentum before collision = momentum after collision
M1U1 + M2U2 = M1V1 + M2V2
in the case of this two, the formula becomes
M1U1 + M2U2 = V (M1 + M2) since she jumped into his arm
there masses are M1 = 75.6 kg M2 = 59 kg and their velocities are U1 = 3.7 m/s and U2 = 5.4 m/s, their common velocity after collision = V since their motion is backward the formula becomes
-M1U1 - M2U2 = V(M1 + M2)
substitute the values into the equations
(-75.6 × 3.7 ) + (- 59 × 5.4) = V ( 75.6 + 59)
- 598.32 = 134.6 V
divide both side by 134.6
V = - 598.32 / 134.6 = -4.445 m/s = -4.4 m/s to nearest tenth the negative means in the same backward direction
Answer:
Slit separation, ![d=1.13\times 10^{-5}\ m](https://tex.z-dn.net/?f=d%3D1.13%5Ctimes%2010%5E%7B-5%7D%5C%20m)
Explanation:
It is given that,
Wavelength of light, ![\lambda=645\ nm=645\times 10^{-9}\ m](https://tex.z-dn.net/?f=%5Clambda%3D645%5C%20nm%3D645%5Ctimes%2010%5E%7B-9%7D%5C%20m)
The angle between the central bright fringe and the second dark fringe, ![\theta=4.9^{\circ}](https://tex.z-dn.net/?f=%5Ctheta%3D4.9%5E%7B%5Ccirc%7D)
In case of double slits, the condition for dark fringe is given by :
![d\ sin\theta=(n-\dfrac{1}{2})\lambda](https://tex.z-dn.net/?f=d%5C%20sin%5Ctheta%3D%28n-%5Cdfrac%7B1%7D%7B2%7D%29%5Clambda)
n = 2
![d\ sin\theta=\dfrac{3}{2}\lambda](https://tex.z-dn.net/?f=d%5C%20sin%5Ctheta%3D%5Cdfrac%7B3%7D%7B2%7D%5Clambda)
![d=\dfrac{3\lambda}{2\ sin\theta}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7B3%5Clambda%7D%7B2%5C%20sin%5Ctheta%7D)
![d=\dfrac{3\times 645\times 10^{-9}}{2\ sin(4.9)}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7B3%5Ctimes%20645%5Ctimes%2010%5E%7B-9%7D%7D%7B2%5C%20sin%284.9%29%7D)
![d=1.13\times 10^{-5}\ m](https://tex.z-dn.net/?f=d%3D1.13%5Ctimes%2010%5E%7B-5%7D%5C%20m)
So, the slit separation is
. Hence, this is the required solution.
It takes sunlight 8 minutes to reach earth , so yes