If you have a unknown substance with the follow traits, which category of elements would it most likely belong?

1. brittle

2. luster

3. solid at room temperature (stp)

options:

metal

metalloid

non-metal

there is no way to categorize this substance

The discovery that the universe appears to be expanding led to a widely accepted theory called a.) the big bang theory b.) the doppler effect c.) hubble’s law d.) solar nebular theory e.) the seyfert theory

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

At what time will the interfering waves have an amplitudeof zero?