subject
Physics, 02.01.2020 23:31 sophiaaafaline

Which of the following statements about earthquakes is true?

a)earthquakes and volcanic eruptions always occur at the same time.
b)earthquakes can only occur on dry land or under water at depths less than 100 meters.
c)earthquakes occur at regular intervals, usually every five years.
d)the date of future earthquakes cannot be precisely predicted.

ansver
Answers: 1

Another question on Physics

question
Physics, 22.06.2019 14:20
Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.
Answers: 1
question
Physics, 22.06.2019 17:50
Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?
Answers: 1
question
Physics, 22.06.2019 22:00
The pilot of a helicopter hovers at an altitude of 1200 feet over a park. the angle of depression to the base of a statue is 17 degrees. the angle of depression to the nearest park exit, in line with the statue, is 14 degrees. to the nearest foot, what is the distance from the statue to the exit?
Answers: 1
question
Physics, 23.06.2019 01:00
The smallest particle of an element that retains its identity in a chemical reaction. true or false
Answers: 1
You know the right answer?
Which of the following statements about earthquakes is true?

a)earthquakes and volcanic...
Questions
question
Biology, 01.12.2021 04:40
question
Mathematics, 01.12.2021 04:40
question
Mathematics, 01.12.2021 04:40
Questions on the website: 13722360