Sri

Fe3O4(s) + CO(g) = Fe(s) + CO2(g)

Is this Acidic or Basic

Two 30m long space ships are flying towards each other. one ship is traveling at 0.30c and the other at 0.42c. what does each of the pilots observe the other ship's length to be?

This question is from the wave nature of light.

Red light, of wavelength 600 nm, passes through a double slit. A pattern appears on a screen 3.0 m away. What is the distance between the 1st and 4th nodal lines, of the slits are 4.0 x 10-5 m apart? 

The blue light of wavelength 450 nm passes through a single slit with a width of

1.5 x 10^-5m. What is the angle to the third secondary maximum that appears on the screen? 

A skier is maintaining a constant speed as she descends a mountain slope. Which of the following best describes the energy transfer during this process?

1) Kinetic energy is transformed into potential energy.

2) Kinetic energy is transformed into potential energy

3) Potential energy is transformed into kinetic energy

4) Potential energy is transformed into thermal energy.

A hockey puck of mass 0.16 kg, sliding on a nearly frictionless surface of ice with a velocity of 2,0 m/s[E], strikes a second puck at rest with a mass of 0.17kg. The first puck has a velocity of 1.5 m/s [N 31 E] after the collision. Determine the velocity of the second puck after the collision.

A wheel of diameter 85 cm spins at a rate such that a point on the rim of the wheel has an acceleration of 45 m/s^2. How many rotations does the wheel make in 1.0 min?

Bill rides his bicycle 5.0 km [N], then 4.0 km [E], then 5.0 km [S], then 2.0 km [W], in a total time of 2.0 h. What is his average speed for the trip?