A thunderstorm! You see a flash of lightning across the sky. Five seconds later, your hear the thunder. If lightning and thunder come from the same source, then why don't they occur at the same time?
They do! The time difference is due to the way sound waves and light waves travel. Light travels extremely fast through the air, 300,000,000 m/s. Sound travels much slower, 343 m/s through air. Therefore we can see light in an instant, but it takes a while to hear thunder. The speed of light waves and sound waves depends on the medium through which they travel. Take a look at the data in the image above.

How do the speeds of sound and light waves compare?

a. Light waves cannot travel through a dense material like a solid.
b. Sound waves travel fastest through a dense medium like the solid ground.
c. Light waves can travel through a vacuum; sound waves cannot.
d. The speeds of light and sound are affected in the same way in different mediums.
e. The denser the medium, the faster sound travels.

How do scientists think that gravity affected the formation of our solar system?

Plz me ! 1 which of earths spheres contains most of its mass? a atmosphere b hydrosphere c geosphere* d biosphere 2 erosion and weathering are examples of which types of forces? a constructive forces b destructive forces* c gravitational forces d inertia-related forces 3 which of the following statements about earths atmosphere is true? a earths atmosphere contains 78% water vapor which is essentail to life b earths atmosphere contains 21% oxygen c earths atmosphere contains carbon dioxide which all life forms require d earths atmosphere allows radiation from the sun to pass through it and warm earths surface* 4 the strenght of the force of gravity between two objects is determined by which of the following factors? select all that apply a the messes of the objects* b the distance between the objects* c the volumes of the objects d the surface area of the objects 5 earth and moon are kept in there respective orbits due to the influence of a inertia b gravity c gravity and inertia* d neither gravity or inertia if you answer all questions right i will give

The fact that the total amount of energy in a system remains constant is a(n)