Which of the following are good ways to test whether a solution is an acid or a base?

Tasting it

Litmus paper

Phenolphthalein

Touching it

A parallel-plate capacitor connected to a battery becomes fully charged. After the capacitor from the battery is disconnected, the separation between the plates of the capacitor is doubled in such a way that no charge leaks off.

A brick is thrown from a wall that is 19.2 m above the ground and hits the ground 5.00 s later. What was the initial velocity of the brick?

Light from the sun travels through space to Earth's atmosphere. Which will light waves do when they move from empty space into matter made up of different gases? A. move at the same speed B. move faster as they transmit C. slow down and refract D.

As a person pushes a box across a floor, the energy from the person's moving arm is transferred to the box, and the box and floor become warm. During this process, energy is -increased -conserved -destroyed -decreased

You walk 10 miles north, 20 miles south, and 5 miles north. Taking north to be the positive y direction, define a position vector that describes your position on the y-axis.

Causes the output work of a machine to be less than the input work

the statement, "energy can neither be created nor destroyed, but can change from one form to another," is blank. the first law of thermodynamics

Are x rays emitted during radioactive decay

Greg walks on a straight road from his home to a convenience store 3.0 km away with a speed of 6.0 km/h. On reaching the store he finds that the store is closed, he instantly turns around and walks back with a speed of 9.0 km/h.

Because light travels in a straight line and casts a shadow, Isaac Newton hypothesized that light is