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

Author Question: A 30-year-old astronaut goes off on a long term mission in a spacecraft that travels at speeds close ... (Read 24 times)

V@ndy87

  • Hero Member
  • *****
  • Posts: 571
on: Jul 29, 2018
A 30-year-old astronaut goes off on a long term mission in a spacecraft that travels at speeds close to that of light. The mission lasts exactly 20 years as measured on Earth. Biologically speaking, the astronaut's age would be
 
  A) more than 50 years.
  B) exactly 50 years.
  C) less than 50 years.
  D) exactly 30 years.
  E) exactly 25 years.

Question 2

One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900C; exhaust temperature = 430C. 7.0  109 cal of fuel produces 1.4  1010 J of work in one hour.
 
  What is the power output, in hp, of this engine?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jaaaaaaa

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

5213 hp


V@ndy87

  • Member
  • Posts: 571
Reply 2 on: Jul 29, 2018
Wow, this really help

Dinolord

  • Member
  • Posts: 313
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Bururi long-fingered frog (Cardioglossa cyaneospila) Bururi long-fingered frog (Cardioglossa cyaneospila)
A young Lipizzan at the Spanish Riding School in training equipment, wearing saddle, bridle and long A young Lipizzan at the Spanish Riding School in training equipment, wearing saddle, bridle and long
Long-Term Potentiation and Long-Term Depression Long-Term Potentiation and Long-Term Depression
A tightrope walker walks across a 30-m long wire tied between two poles. The center of the wire ... A tightrope walker walks across a 30-m long wire tied between two poles. The center of the wire ...
In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ... In the figure, a 10.0-m long bar is attached by a frictionless hinge to a wall and held ...
Analysts expect Virtucon to make payouts of $8.7643B at the end of this year. Assume that all ... Analysts expect Virtucon to make payouts of $8.7643B at the end of this year. Assume that all ...
Video: Genetic terms Animation

For a complete list of videos, visit our video library