Imagine that you are sitting in a closed room (no windows, no doors) when, magically, it is lifted from Earth and sent accelerat
1 answer:
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Answer:
514 cal
Explanation:
In order to calculate the lost heat by the amount of water you first take into account the following formula:
(1)
Q: heat lost by the amount of water = ?
m: mass of the water
c: specific heat of water = 1cal/g°C
T2: final temperature of water = 11°C
T1: initial temperature = 12°C
The amount of water is calculated by using the information about the density of water (1g/ml):
Then, you replace the values of all parameters in the equation (1):
The amount of water losses a heat of 514 cal
Answer:
0.0984
Explanation:
From the first diagram attached below; a free flow diagram shows the interpretation of this question which will be used to solve this question.
From the diagram, the horizontal component of the force is:
Replacing 42° for θ and 87.0° for
On the other hand, the vertical component is ;
Replacing 42° for θ and 87.0° for
However, resolving the vector, let A be the be the component of the mutually perpendicular directions.
The magnitude of the two components is shown in the second attached diagram below and is now be written as A cos θ and A sin θ
The expression for the frictional force is expressed as follows:
Where;
is said to be the coefficient of the friction
N = the normal force
Similarly the normal reaction (N) = mg - F sin θ
Replacing . The normal reaction can now be:
By balancing the forces, the horizontal component of the force equals to frictional force.
The horizontal component of the force is given as follows:
Making the subject of the formular in the above equation; we have the following:
Replacing the following values: i.e
m = 73 Kh
g = 9.8 m/s²
Then:
Thus, the coefficient of friction is = 0.0984
Answer:
Buffy > Aiko > Chandra > Freja > Evita
Explanation:
Beats occur when two waves of nearby frequencies overlap. The number of beats per second is equal to the difference in the frequency.
Let
Frequency of Kira
Frequency of Aiko
The beat frequency of Kira and Aiko is therefore,
Substituting for
and
for
, we get
From the above equation, we see that beats increase
when
Frequency of Chandra
The beat frequency of Kira and Chandra is therefore,
From the above equation, we see that beats decrease
When
Frequency of Evita
The beat frequency of Kira and Evita is therefore,
From the above equation, we see that beats decrease
When
Frequency of Freja
The beat frequency of Kira and Freja is therefore,
From the equation above, we see that beats decrease
When
Frequency of Buffy
The beat frequency of Kira and Buffy becomes,
From the equation above, we see that beats increase
Hence, the rank of members based on initial frequencies from largest to smallest is Buffy > Aiko > Chandra > Freja > Evita