A sample of radium-226 will decay to ¼ of its original amount after 3200 years. What is the half-life of radium-226?

years?

A 100-g toy car moves along a curved frictionless track. At first, the car runs along a flat horizontal segment with an initial velocity of 2.77 m/s. The car then runs up the frictionless slope, gaining 0.

What kind of waves are lasers worked by?

Which term names traces or remains of organisms that lived in the past? A. adaptations B. mutations C. traits D. fossils

One way to improve food security is to avoid food spoilage. Identify the correct ways that Devon reduced food spoilage in the passage. Devon prepared spaghetti and homemade sauce for dinner.

A boat has a mass of 4900 kg. Its engines generate a drive force of 4600 N due west, while the wind exerts a force of 670 N due east and the water exerts a resistive force of 1170 N due east. Take west to be the positive direction.

What is the reason behind the tail of a comet moving away from the Sun? A The gravity of Jupiter pulls it away from the Sun. The nucleus of the comet propels it away from the Sun. C. The radiation pressure and solar wind propels it away from the Sun.

Calculate the energy released as heat when 51.60 g Cu 2 O (s) undergo oxidation at constant pressure.

During summer vacation, Juan traveled a total distance of 400 miles. His trip took 8 hours. What was the average speed during his trip?

Where Pabs is absolute pressurePg, is gauge pressure, and Patm is atmospheric pressure. For example, if your tire gauge reads 34 lb/incz (pounds per square inch), then the absolute pressure is ...

The tip of a triangle is held 12.0 cm above the surface of a flat pool of water. A submerged swimmer in the pool sees the tip of the triangle at what distance above the water? Let the indices of refraction nwater = 1.33 and nair = 1.00.