When nuclear fusion ends in a high-mass star, the heavy elements formed in the star's core are released through a

Genes can be turned on or turned off not all genes are active at one time true or false

A museum sets up a display of fluorescent minerals. Which best describes how electromagnetic waves can be used to enhance the display? Infrared light shining on the minerals will cause them to give off visible light.

A Nichrome wire is used as a heating element in a toaster. From the moment the toaster is first turned on to the moment the wire reaches it maximum temperature, the current in the wire drops by 20% from its initial value.

How long (in ns) does it take light to travel 1.0 m in vacuum?

how can you use the periodic table to determine the average number of neutrons in element has even though the number of neutrons is not listed

The mass of the Sun is 1.99 * 1030 kg. Jupiter is 7.79 * 108 km away from the Sun and has a mass of 1.90 * 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is * 1023 N.

You measure the magnetic field of a long, current-carrying wire to be B is equal to start fraction 50 times mu naught over pi end fraction at a distance of r = 7.5 cm. How much current is running through the wire?

In any food chain or web, the original source of energy is

Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land

How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?