Its acceleration is 5m/s2.
The formula for acceleration is Final speed - initial speed/time.
So 40m/s - 25m/s is 15m/s.
15m/s divided by 3s is 5m/s2.
Thus the acceleration is 5m/s2
Answer:
b. reading data from your computer's hard drive
Explanation:
Reading data from compact hard disc is an operation which is based ob kerr effect or Faraday effect . This effect involves rotation of plane of polarization of light when light passes through a magnetic field. In order to read data from disc , a low intensity laser light is made to fall upon the disc . On reflection,
the plane of polarization of laser light is rotated . The extent of rotation depends the extent of magnetization of magnetic disc. In this way information stored in the form of magnetic field is converted into information in the form of light .
The work should be at least equivalent to the kinetic energy possessed by the boat and its riders. The formula for kinetic energy is written below:
W = KE
W = 1/2*mv²
W = 1/2*(1,000 kg)(1.3 m/s)²
<em>W = 845 J</em>
Total time elapsed is =8.2y
The starting event is the astronaut leaving Earth. The finishing event is the astronaut arriving at the star system. The time between these events on Earth is:
Δt=3.9ly/0.9c
Δt=4.3y
For the astronaut, two events occur at the same position and can be measured with just one clock. Hence,
Δτ
Δτ
Δτ=1.8ly
The total elapsed time is:
T elapsed=Δt+3.9
T elapsed=4.3+3.9
T elapsed=8.2y
learn more about time from here: brainly.com/question/28208983
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<span>In this particular case, where car is moving through curvature, so it is moving in circular motion, force acting on car is centripetal force which holds car not to fly out. Centripetal force is always pointed in the middle of circle. Here frictional force has role of centripetal force. If frictional force is to weak, car would fly out of curvutare.</span>
