Show diagrammatically how forc of 7N and 9N can be combined to give a resulntant force
1 answer:
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Explanation:
The given data is as follows.
mass, m = 75 g
Specific heat of water = 4.18
First, we will calculate the heat required for water is as follows.
q =
=
= 8464.5 J/mol
= 8.46 kJ ......... (1)
Also, it is given that = (20 + 273) K = 293 K and specific heat of ice is 2.108 kJ/kg K.
Now, we will calculate the heat of fusion as follows.
q =
=
= -46.32 kJ ......... (2)
Now, adding both equations (1) and (2) as follows.
8.46 kJ - 46.32 kJ
= -37.86 kJ
Therefore, we can conclude that energy in the form of heat (in kJ) required to change 75.0 g of liquid water at to ice at
is -37.86 kJ.
Answer:
4.34 mi at north of east
Explanation:
The displacement of an object in motion is a vector connecting its initial position to the final position of motion.
In this problem, the man has 2 different motions:
- 3.50 mi due east
- 2.57 mi due north
We can take the east direction as positive x-direction and north as positive y-direction, so these two motions can be written as:
Since the two motions are perpendicular to each other, the resultant displacement can be found by using Pythagorean's theorem; therefore:
We can also find the direction using the equation:
And therefore,
Answer:
f = 5.63 x 10¹⁴ Hz
Explanation:
Given,
speed of light, c = 3 x 10⁸ m/s
wavelength,λ = 533 n m = 5.33 x 10⁻⁷ m
frequency, f = ?
using formula of frequency
c is the speed of light
f = 5.63 x 10¹⁴ Hz
hence, the frequency of the light is equal to f = 5.63 x 10¹⁴ Hz