A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the person's hand at -5.0 m/sec, what was its velocity on impact?
Answers
in 1.1 second of falling, an object gains (9.8 x 1.1) = 10.78 meters per second of
downward speed.
The balloon was already falling at 5 m/sec when the time began, and it gained
another 10.78 m/sec on the way. So at the end of 1.1 second, its downward
speed was (5.0 + 10.78) = 15.78 m/sec.
Its velocity was 15.78 m/sec downward.
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What do you think that astronomers mean when they use the term observable universe? (Hint: Thi.nk of the time it takes for light from very distant objects to reach Earth.)
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acting on it in the direction opposite to its motion.
Answers
Answer:
one with 60g have the more potential
Explanation:
opposite to the net force
left
opposite to motion
Answers
The friction arrow in an FBD for a moving object point is in opposite way to motion. Because friction always works in the opposite direction of the motion of the object.
Answer: Option D
Explanation:
When two object come into contact, the contact force come into play. Now, one component of the contact force i.e. the normal forces act perpendicularly at the direction of motion. Whereas, the frictional forces always acts parallel at the direction of the force acting on the object but in the opposite way.
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the principal energy level
B.
the shape of the orbital
C.
the energy of the orbital
D.
the ground state
Answers
Hello!
The answer is A. the principal energy level
Why?
The principal energy level or principal quantum number n, tell us about the position of an determined electron in the energy levels relative to the greater average distance of an electron from the nucleus, the larger the value of n and the higher its energy.
The principal energy levels contains n sublevels, orbitals and
electrons.
For example, the number 1, has one orbital which is contained in a energy sublevel, its called s orbital, and it's just an orbital with 2 electrons.
Have a nice day!
Answers
The frequency and wavelength of the sound wave with the given time period and speed are 500Hz and 0.688m respectively.
What is Period and Wavelength?
Period is simply the time taken for a complete cycle of vibration to pass a given point. Frequency is expressed as;
f = 1/T
Where f is frequency and T is period of time.
Given that;
- Period T = 0.002s
- Frequency f = ?
f = 1/0.002s
f = 500s⁻¹
f = 500Hz
Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.
From the wavelength, frequency and speed relation,
λ = s ÷ f
Where λ is wavelength, s is speed and f is frequency.
Given that;
- Speed c = 344m/s
- Frequency f = 500Hz
- Wavelength λ = ?
λ = s ÷ f
λ = 344m/s ÷ 500s⁻¹
λ = 0.688m
Therefore, the frequency and wavelength of the sound wave with the given time period and speed are 500Hz and 0.688m respectively.
Learn more about Speed, Frequency and Wavelength here: brainly.com/question/27120701
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Answer:
Given
Time (T) = 0.002 sec
Velocity(V) = 344 m/s
Frequency (f) = ?
Wavelength (w) = ?
Explanation:
We know that
Frequency (f) = 1/ t
= 1/ 0.002
= 500 hertz
Now
wavelength = V/f
= 344/500
= 0.688 m