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

You are alone in a large, completely dark auditorium on Earth. What kind of telescope should I use from the other side of the auditorium to detect the electromagnetic radiation emitted by your body?

A 1.30-m long gas column that is open at one end and closed at the other end has a fundamental resonant frequency 80.0 Hz. What is the speed of sound in this gas?

Why can you not measure the volume of water in the measuring cylinder accurately unless you look straight at the scale?

One end of the rope is vibrated to produce a wave with a wavelength of. 25 m. The Frequency of the wave is 5.0 Hz. What is the speed of the wave?

A missile is moving 1350 m/s at 25.0° angle. It needs to hit in a 55.0° direction in 10.20 s. What is the direction of its final velocity?

In the movie "Santa Claus is Coming to Town", the Mayor Burgermeister Meisterburger outlaws toys after tripping on a rubber duck. To make rubber ducks un-crushable while being delivered by Santa, the ducks are filled with an inert, harmless gas. A 2.

Which of the following represents a chemical change? rocks being smoothed by rapid water movement the pink color of a rose iron's attraction to a magnet decomposition of stone due to acid rain

How many grams of CO2 are in 3 mol of the compound?

o keep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. The ball has a radius of 20.0 cm and an emissivity of 0.790.

How many brothers and sisters did beethoven have?