There is a 50 g sample of Ra-229. It has a half-life of 4 minutes.

How much will be left after 12 minutes?

The loudness of a sound is inversely proportional to the square of your distance from the source of the sound.

Which of the following pair of force can be added to give a resultant of 5 Newton? ans with reason 1• 2N and 8N 2• 3N and 10N 3• 2N and 6N 4• 10N and 20N

Why can astronots open the door at space

What condition must be met when writing a formula for an ionic compound

How do you find your soul?

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids.