<h2>Answer:</h2>
Acceleration= -1.11 m/sec²
<h2>Explanation:</h2>
Date Given to us is
Mass = 150 kg
Time = 1.5 minutes = 90 seconds
Distance = 2500 meters
Initial Velocity = 120 m/s
Final Velocity = 20 m/s
Acceleration = ?
<u>Solution:</u>
By using First Equation of motion
Vf = Vi + at
Putting the values
20 = 120 + a (90)
Subtracting 120 on both sides
20-120 = 120 + a(90) - 120
-100 = 90 a
Dividing both sides by 90
-100/90 = 90 a / 90
-1.11 = a
So the acceleration is -1.11 m/s²
Energy = hc/λ, where h is planck's constant, c is the speed of light and λ is the wavelength.
Energy = (6.626 x 10^-34*3.00 x 10^8)/(<span>4.80 × 10^−7)= 4.14*10^-19 J, which is 3.
Normally, when solving these equations, don't forget to check the units are correct (eg. wavelength is in meters) and dont forget to include the units in the calculation.</span>
Answer:
A theory changes based on new observations and testing.
Explanation:
The first statement here refers to a law. A law states how something behaves without providing an explanation to such observations.
Scientific theories are explanation into a phenomenon. They give reasons to why certain patterns are noticeable.
They are based on multiple tests and validation of a hypothesis. By so doing, they can be changed based on new observations and testing.