The lines in an atomic line emission spectrum are due to

If a ping pong ball and a golf ball are both moving in the same direction with the same amount of kinetic energy, the speed of the ping pong ball must be A. less than golf ball B. same as golf ball C. more than golf ball D. impossible to know

Explain how scientific knowledge develops through making observations about the natural world

What is EMF? When are we exposed to EMF? Does EMF increase or decrease with distance? What are the primary differences in direct current and alternating current?

All compounds are positively charged true or false

You have just landed on Planet X. You release a 100-g ball from rest from a height of 10.0 m and measure that it takes 3.40 s to reach the ground. Ignore any force on the ball from the atmosphere of the planet.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?