This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The mass of the Sun is 2.0 1030 kg, and the mass of a hydrogen atom is 1.67 10-27 kg. If we assume ... (Read 108 times)

Ebrown

  • Hero Member
  • *****
  • Posts: 567
on: Jul 28, 2018
The mass of the Sun is 2.0  1030 kg, and the mass of a hydrogen atom is 1.67  10-27 kg. If we assume that the Sun is mostly composed of hydrogen, how many atoms are there in the Sun?
 a. 1.2  1056 atoms
  c. 1.2  1057 atoms
  b. 3.4  1056 atoms
  d. 2.4  1057 atoms

Question 2

When NASA was communicating with astronauts on the moon, the time from sending on the Earth to receiving on the moon was 1.28 s. Find the distance from Earth to the moon. (The speed of radio waves is 3.00  108 m/s.)
 a. 240,000 km
  c. 480,000 km
  b. 384,000 km
  d. 768,000 km


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ju

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


Ebrown

  • Member
  • Posts: 567
Reply 2 on: Jul 28, 2018
Great answer, keep it coming :)

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Two representations of heme (derived from PDB ID 1CCR). The iron atom Two representations of heme (derived from PDB ID 1CCR). The iron atom
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
The Mass of Impacts on Earth The Mass of Impacts on Earth
Water, Hydrogen, Methane Water, Hydrogen, Methane
Mass Wasting Forms Mass Wasting Forms
An unknown gas occupies a volume of 1.50 L at 21 °C and 0.950 atm. If the mass i An unknown gas occupies a volume of 1.50 L at 21 °C and 0.950 atm. If the mass i
Video: Carpal Tunnel Syndrome

For a complete list of videos, visit our video library