What type of reaction is 2Na+2H2O?2NaOH+H2+heat

1. Susie wondered if the height of a hole punched in the side of a quart-size milk carton would affect how far from the container a liquid would spurt when the carton was full of the liquid.

Give an example of an elastic and an inelastic collision:; State whether or not momentum and kinetic energy are conserved in each case.

The electromagnet shown below is made up of a coil of electrical wire wrapped around an iron core. Which of the following would decrease the strength of this electromagnet?

What is an atwood machine?

The drawing below shows two different types of pulley systems designed to lift a weight. In pulley system A, the end of the rope must be pulled 10 cm downward in order to raise the weight 10 cm upward.

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.

What are the starting materials for nuclear fission

Why is it possible to throw a 0.145 kg baseball much further than a 7 kg bowling ball?

What is the name of the force that opposes or slows down the motion of objects