The ultraviolet Lyman alpha line of hydrogen with wavelength 121.5 nm is emitted by an astronomical object. An observer on Earth measured the wavelength of the light received from the object to be 607.5 nm. The observer can conclude that the object is moving with a radial velocity of

the observer can conclude that the object is moving with a radial velocity of

Explanation:

In relation  to Doppler effect for light, the formula can be represented as:

where,

= wavelength of the light emitted by an object = 607.5 nm

= wavelength of ultraviolet Lyman-alpha line of hydrogen by astronomical object = 121.5 nm

 =

It is clear that the 'positive sign usually denotes "approaching" and the 'negative sign usually denotes "receding".

However, Since the object and the source are receding. Then, we have :

Squaring on both sides & we have:

Therefore; the observer can conclude that the object is moving with a radial velocity of

the answer to this question is 60 n

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.