You are watching: Which statement best describes the formation of diamonds?
Two players, Amy and Beth, play the following game with a jar containing 100 pennies. The players take turns -- Amy goes first.
A tray of electronic components contains 15 components, 4 of which are defective. If 4 components are selected, what is the poss
To find different probabilities for the selection of components among eleven good and four defective components, we will use the Combination.
12 grams of Iodine-13 was present 16 days ago
Amount of Iodine-131 sample present now = 3g
Amount of Iodine-131 sample present before 16 days = ?
W know that the half life of Iodine-131 is 8days
Let the amount of sample before 16 days be X
The X amount Iodine-131 sample will decay ito ist half after 8 days
after 8 days
after next 8 days , i.e., 16 days
Now we know that after 16 days we have 3 grams of Iodine-131 sample
X = 12
A 40-turn coil has a diameter of 11 cm. The coil is placed in a spatially uniform magnetic field of magnitude 0.40 T so that the
(a) emf = 0.507 V
(b) emf = 0.0507 V
(c) emf = 0.00234 V
number of turns of the coil, N = 40 turns
diameter of the coil, d = 11 cm
radius of the coil, r = 5.5 cm = 0.055 m
magnitude of the magnetic field, B = 0.4 T
The magnitude of the induced emf is calculated as;
(a) when the time, t = 0.3 s
(b) when the time, t = 3.0 s
(c) when the time, t = 65 s
If a book is knocked off a desk that is .75 m tall at a rate of 2.0 m/s, how far away from the desk does it fall
wgc2010.org: 0.8 m
In the vertical direction, the speed is zero, u = 0.
Distance covered in the vertical direction, s = 0.75 m.
The book would fall with acceleration due to gravity in the vertical direction, a = g = 9.8 m/s²
From the equation of motion,
s = u t + 0.5 a t²
Substituting the above values, we will find out the time taken for the book to hit the ground.
⇒0.75 m=0+0.5×9.8 m/s²×t²
⇒t = √0.153 = 0.39 s ≈ 0.40 s
Now, the horizontal distance covered,
d = v×t ⇒d= 2.0 m/s × 0.40 s =0.8 m
Hence, the book falls 0.8 m away from the desk.
7 months ago
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See more: Kg/S To Lb/Hr - Kilograms Per Second To Pounds Per Hour