Atrain travels 74 kilometers in 1 hours, and then 83 kilometers in 5 hours. what is its average speed

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?