Answer:
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If a ship is moving forward has positive acceleration what can be said about the velocity of the ship?
1 answer:
Increasing
Explanation:
If a ship is moving forward and has a positive acceleration, we can say that the velocity of the ship is increasing.
Velocity is the rate of change of displacement of a body with time.
Acceleration is the rate of change of velocity with time.
Acceleration =
If a ship is moving with positive acceleration, the velocity of the ship is increasing also.
- This is because when velocity is increasing, the change will be positive.
- From the equation, to have positive velocity, the final velocity must be greater than the initial one.
- With this, acceleration will be positive.
- So we can say, velocity of the ship is increasing.
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Answer:
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Solution:
As per the question:
Actual depth in water, d = 0.60 m
Normal distance of her feet from her eyes, D = 1.60 m
Now,
We know that refractive index of water,
Thus
To calculate the apparent height of her feet:
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Where:
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We can rearrange formula to get:
We are working woth same gas so we can write following formula. Index 1 stands for conditions before change and index 2 stands for conditions after change.
We are given:
p1=92.1kPa = 92100Pa
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We start by rearranging formula for V2. After that we can insert numbers:
Where:
p = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
We can rearrange formula to get:
We are working woth same gas so we can write following formula. Index 1 stands for conditions before change and index 2 stands for conditions after change.
We are given:
p1=92.1kPa = 92100Pa
V1=200mL = 0.2L
T1=275K
p2= 101325Pa
T2=273K
V2=?
We start by rearranging formula for V2. After that we can insert numbers:
Answer:
the frequency of the hummingbird is 80 Hz.
Explanation:
Given;
number of times the hummingbird beats its wings, n = 4,800 times
the duration of this motion, t = 1 minute
The frequency of the hummingbird wings is calculated as follows;
Therefore, the frequency of the hummingbird is 80 Hz.