if a star 100 light years from earth is beginning to expand into a giant star how long will it take for astronomers to observe this development explain

A beam oflight is reflected off a mirror. If the angle of incidence is 30 degrees, according to the Law of Reflection the angle of the reflected light beam will bea. 15 degreesb. 30 degreesc. 60 degreesd. 90 degrees

Based on the information presented in the graph, what is the velocity of the object?

Which of the following is true about a universal law? A: It is easily disproven. B: It is true most of the time. C: It acts everywhere at all times. D: It explains why we use the SI system of measurements.

Magnetoencephalography (MEG) is a noninvasive method for studying electrical activity in the brain. It is based on the principle that an electric current creates a magnetic field, whether the current is in a wire or in the neurons of a brain.

Which body system remove carbon dioxide and waste

How many constellations are there?

What units are given to the right of the equals sign

Vector has a magnitude of 5.2 units and is directed east. vector has a magnitude of 4.3 units and is directed 35° west of north. by constructing vector diagrams, find the magnitudes and directions of (a) and (b) 4. (a)

Which of the following has the greatest momentum? A - Truck with a mass of 2250 kg moving at a velocity of 25m/s B - car with a mass of 121010 kg moving at a velocity of 51 m/s C - truck with a mass of six 6120 kg moving at a velocity of 10 m/s

How is a magnetic field generated?