Which is a true statement about waves?

A

They always travel in every direction at the same time.

B.

They travel at different speeds through different materials.

c.

They cannot travel through liquids or solids.

D.

They

They can only travel through vacuum.

What can student do to increase the force of attraction of magnet on the iron (metal) block?

As a wave travels through a medium, it displaces the particle perpendicular to the motion of the wave. We can conclude that this is a a. longitudinal wave because of the direction that the wave travels. b.

A glass rod that has been charged to + 12.0 nC touches a metal sphere. Afterward, the rod's charge is + 8.0 nC.

At a busy intersection, a 1320-kg car traveling west with a speed of 12 m/s collides head-on with a minivan traveling east with a speed of 9.4 m/s. The cars stick together and move with a velocity of 1.5 m/s to the east after the collision.

Which sentences in this passage are true? Florida is prone to hurricanes. That is because the southern part of the state is covered in everglades.

What element will form an ionic bond with carbon

State the condition for maximum current to be drawn from the cell

Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color. Suppose a glass lens (ng = 1.53) is covered with a thin film (nf = 1.31) to prevent green light (λ = 534 nm) from being reflected.

Light incident on a surface at an angle of 45 degrees undergoes diffused reflection. At what angle will it reflect?

A ship on the surface of the ocean receives a sonar echo back from an underwater object. The echo path from the object to the ship is at an angle of 35 degrees above the horizontal and takes 3s to return. (Velocity of sound in sea water = 1500m/s).