Explain why mass is constant everywhere

An electron with kinetic energy of 2000 eV (1 eV = 1.602 x 10-19 J) is fired horizontally across a horizontally oriented conducting plate with a surface charge density + 4.00 x 106 C/m2.

If you used 16 gallons when driving 367 miles, what was your gas mileage over that distance

A baseball of mass 0.143 kg is thrown from the roof of a building 23.1 m above the ground. Its initial velocity is 37.6 m/s at an angle of 45◦ above the horizontal. The acceleration of gravity is 9.81 m/s 2.

A box is at rest on a table. What can you say about the forces acting on the box?

Why is coal costly to produce? 1. coal is found deep underground. 2. Coal is expensive to make 3. Coal is only found in certain places on earth. 4. Coal is difficult to make in the lab.

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

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.