Answer:
27.3 m/s
Explanation:
We are given that
Distance travel by ball=x=60 m
We have to find the initial speed( of the ball.
Using the formula
The value of y at point of foot of the vertical distance
y=0
Using
Using the formula
Hence, the initial speed of the ball=27.3 m/s
1. When an object is moving away from us, the light from the object is known as redshift, and when an object is moving towards us, the light from the object is known as blueshift.
2. A wavelength increases in size, and its frequency, and energy decrease.
3. The frequency of a wave increases, and its wavelength decreases.
Redshift is an important term for astronomers. The term can be taken literally. The wavelengths of light are stretched and perceived as shifting toward the red portion of the spectrum. The same thing happens to sound waves when the source moves relative to the observer.
As the wave frequency decreases, the wavelength increases as long as the wave velocity remains constant. If the wave speed stays the same as the frequency decreases, it means that fewer wave peaks or troughs pass through a given point in a given time period. The number of complete wavelengths in a given unit of time is called frequency. Frequency and energy decrease with increasing wavelength.
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By definition, we have to:
Digestion is the transformation of foods that are ingested into simpler substances to be absorbed.
Digestion has different processes:
1) Mechanical processes to reduce the size of food.
2) Chemical processes to reduce the size of the particles and prepare them for absorption.
Therefore, the energy derived from the digestion process is the chemical energy.
Answer:
The energy derived from the digestion of food is chemical energy.
The final combined speed of the two trains is 3.4 m/s
Explanation:
We can solve this problem by using the law of conservation of momentum: in absence of external forces, the total momentum of the two trains must be conserved before and after the collision.
Therefore we can write:
where:
is the mass of the first train
is the initial velocity of the first train, which is at rest
is the mass of the second train
is the initial velocity of the second train
is the final combined velocity of the two trains after the collision
We can now solve the equation for v, to find the final combined velocity of the two trains:
So, the final combined speed is 3.4 m/s.
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That element is oxygen. It is also highly volatile since it reacts with other elements and is flammable.