True or false nodes and antinodes occur in longitudinal waves

What is the atomic mass of an element?

A balloon contains helium with a mass of 0.00296 g. What is the volume of helium in the balloon? (Note: Helium's density is 0.00001663 g/cm3.) Volume: 0.00296g/0.00001663g/cm^3 = 177.991581cm^3

If a star is 10 light-years away from us and it explodes today, when will we know that it exploded? today 10 years from today 10 parsecs from today

Because not all stars are the same distance from the earth, it can be difficult to determine

In order to use pythagorean theoremto find the magnitude of a resultant vector which must be true regarding the two initial vectors

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels

What is the wavelength of a wave that has a velocity of 32 m/s and a frequency of 60.6 Hz?

Two objects repel each other with a force of 8N. if

Mike walked 450 m west. He then turned and walked 150 m to the east in 300 seconds. what was his velocity?