A train travels 98 kilometers in 4 hours, and then 99 kilometers in 1 hours. What is its average speed?

Which lunar phase follows a waxing crescent phase? a. full b. new c. first quarter d. third quarter

A cat chases a mouse across a 0.65 m high table. The mouse steps out of the way, and the cat slides off the table and strikes the floor 2.7 m from the edge of the table The acceleration of gravity is 9.81 m/s2.

Three particles are fixed on an x axis Particle 1 of charge q1 is at x a and particle 2 of charge q2 is at x a If their net electrostatic force on particle 3 of charge Q is to be zero what must be the ratio q1 q2 when particle 3 is at x 0.

Que diferencias hay en un termometro clinico de uno de laboratorio

A block has a volume of 0.09m3 and a density of 4000kg/m3. What's the force of gravity acting on the block in water

What is the role of the air spaces in insulating materials? Select all that apply. They trap heat in the spaces. They puts gaps between the particles to slow down conduction. They dissipate energy faster.

Is it true or false that wave interference only occurs with transverse waves?

There have been several proposed atomic models during the last 150 years. Which model best illustrates the Bohr model. This model suggests that an atom's electrons orbit the nucleus in fixed patterns, much like the planets orbit the Sun.

During which type of change should you expect to see different chemical symbols before and after the change?

Ryan is examining the energy of the particles in a bar of gold. What is Ryan most likely studying? thermal energy electric energy potential energy internal energy