Physics Answers

If she drops it from rest and the dime falls 14.2m, how long in time was the dime in the air

What is ratio of De-broglie wavelegth of proton and electron at same kinetic energy.

Seismic station detects P and S waves to determine the location of a Earth quake known as the epicenter. P and S waves travel at different speeds and this difference helps the Earth quake's epicenter.
1) Assuming typical speeds of 8.5km/s and 5.5km/s for P and S waves, respectively; how far away did the Earth quake occur if the seismic station detects the two waves 17 minutes apart?
2) is one seismic station sufficient to determine the position of the epicenter?

I drag a mass m=21 kg in a straight line, along a horizontal surface, a distance D=23 m . I drag it at constant speed v=0.90 m.s−1 in a straight line using a horizontal force. The coefficients of friction are \mu_{s} = 1.2μ
s
​
=1.2 and \mu_{k} = 1.1μ
k
​
=1.1. How much work do I do? W =W= _____ J

1.1.critically describe the relationship between cells, tissues.,organs and organ systems.
1.2.define the different types of tissues.
1.3.describe the different organ systems.
1.4.discuss the mechanisms of evolution.
1.5.explain the evidence of evolution.
1.6.discuss the human evolution

A battery with emf 1.5V is used to power a small lightbulb, which appears to be burning rather faintly. Using a voltmeter and ammeter you determine that the current in the circuit is 355mA, and the potential difference between the terminals of the battery is 0.85V. What is the internal resistance of the battery?

if a tube have filed with water to a height 5m.and suddenly air of specific density of 0.85started to flow over it with 50m/s.find the the new height of water in tube.

find the displacement of plank 20 kg if a man of 60kg is walking on it