Explanation:
K.E. of marble 1 = (1/2) × 0.2 × (22/0.8) ^2
= 0.1 × 756.25
= 75.625
K.E. of marble 2 = (1/2) × 1.2 × (26/0.8)^2
= 0.6 × 1056.25
= 633.75
Answer:
Answer C : person on an elevator going down
Explanation:
We look for a change in state of motion in order to have a net force different from zero in the system. The state of motion doesn't change in any of the examples a, b, or d. But there is a change in the state of motion in case c where initially the person and elevator where in static equilibrium, and later the elevator started going down and accelerating from zero speed to another non zero speed.
Answer:
θ = 34.77°
Explanation:
From diffraction equation:
![m\lambda = dSin\theta](https://tex.z-dn.net/?f=m%5Clambda%20%3D%20dSin%5Ctheta)
where,
m = order of diffraction
λ = wavelength of light used
d = slit separation
θ = angle
Therefore, for initial case:
m = 2
λ = 600 nm = 6 x 10⁻⁷ m
d = slit seperation = ?
θ = angle 20°
Therefore,
![(2)(6\ x\ 10^{-7}\ m)=d(Sin\ 20^o)\\\\d = \frac{12\ x 10^{-7}\ m}{0.342}\\\\d = 3.5\ x\ 10^{-6}\ m](https://tex.z-dn.net/?f=%282%29%286%5C%20x%5C%2010%5E%7B-7%7D%5C%20m%29%3Dd%28Sin%5C%2020%5Eo%29%5C%5C%5C%5Cd%20%3D%20%5Cfrac%7B12%5C%20x%2010%5E%7B-7%7D%5C%20m%7D%7B0.342%7D%5C%5C%5C%5Cd%20%3D%203.5%5C%20x%5C%2010%5E%7B-6%7D%5C%20m)
Now, for the second case:
m = 5
λ = 600 nm = 6 x 10⁻⁷ m
d = slit seperation = (1.5)(3.5 x 10⁻⁶ m) = 5.26 x 10⁻⁶ m
θ = angle = ?
Therefore,
![(5)(6\ x\ 10^{-6}\ m) = (5.26\ x\ 10^{-6}\ m)Sin\theta\\\\Sin\theta = \frac{(5)(6\ x\ 10^{-7}\ m)}{(5.26\ x\ 10^{-6}\ m)}\\\\\theta = Sin^{-1}(0.5703)](https://tex.z-dn.net/?f=%285%29%286%5C%20x%5C%2010%5E%7B-6%7D%5C%20m%29%20%3D%20%285.26%5C%20x%5C%2010%5E%7B-6%7D%5C%20m%29Sin%5Ctheta%5C%5C%5C%5CSin%5Ctheta%20%3D%20%5Cfrac%7B%285%29%286%5C%20x%5C%2010%5E%7B-7%7D%5C%20m%29%7D%7B%285.26%5C%20x%5C%2010%5E%7B-6%7D%5C%20m%29%7D%5C%5C%5C%5C%5Ctheta%20%3D%20Sin%5E%7B-1%7D%280.5703%29)
<u>θ = 34.77°</u>
Answer:
Using Disposable Chopsticks
Birth Control Is Working On Fish, Too
Birds On Prozac
Using Straws
Eating Frog
Using Antibacterial Soap
Keeping The Family Cat
Eating Farm-Raised Fish
Eating Soy
Not Finishing Your Dinner
Explanation:
Answer:
v = 3.00 x 10⁸ m/s
Explanation:
given,
speed of light in vacuum = 299,792,458 m/s
speed of light in scientific notation to three significant figures
v = 2.99792458 x 10⁸ m/s
by rounding off the speed to three significant figure.
v = 3.00 x 10⁸ m/s
On the fourth place the value is greater than 5 so, on the third place 1 will be added.
now, the speed with three significant figure comes out to be
v = 3.00 x 10⁸ m/s