In which phylum do organisms have both jointed appendages and an endoskeleton?

A.

sponges

B.

vertebrates

C.

annelids

D.

arthropods

On what basis are different photons to be distinguished? A. Their energy levels B. The atoms they come from C. Their masses D. Their speeds

If the phase angle for a block-spring system in SHM is ϕ and the block's position is given by x = xm cos (ωt + ϕ), what is the ratio of the kinetic energy to the potential energy at time t = 0? (Use any variable or symbol stated above as necessary.)

An object in projectile motion will follow wich path

A current of4 ampere flows in a wire of resistivity 60 ohm calculate power dissipated in the wire

Which two statements about an electric motor are true? a. It converts motion energy to electric energy. b. It depends on the relative motion of a magnet and a current-carrying wire. c. It depends on a rotating magnet to create a magnetic field. d.

During the Pleistocene, a land bridge connected Alaska and Asia. What could have caused this bridge to from? the ending of an ice age the beginning of an ice age the erosion of the Alaskan coastline the erosion of the Asian coastline

A rock is shot vertically upward from the edge of the top of a tall building. The rock reaches its maximum height above the top of the building 1.60 s after being shot.

Which of the following effects does low nitrogen availability most likely have on the carbon cycle? a. more carbon dioxide is taken up by plants b. carbon dioxide is trapped in the soil around plants c.

If the mass of an object is 300kg and the applied force is 3900N, calculate the acceleration

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? A. from the hand to the cup B. from the cup to the hand C. from the cup to the surrounding air D.