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

Author Question: A metal has a latent heat of fusion of 2.32 104 J/kg, a specific heat of 128 J/kg K, and a melting ... (Read 114 times)

penguins

  • Hero Member
  • *****
  • Posts: 903
on: Jul 29, 2018
A metal has a latent heat of fusion of 2.32  104 J/kg, a specific heat of 128 J/kg  K, and a melting point of 228C. A 30-g pellet of this metal at 16C hits a solid wall and comes to a complete stop.
 
  What would the speed of the pellet have to be in order for it to melt completely when it hits the wall, assuming that all of its kinetic energy is transformed into heat within the pellet? A) 207 m/s
  B) 215 m/s
  C) 232 m/s
  D) 273 m/s
  E) 317 m/s

Question 2

A heat engine having the maximum possible efficiency has an efficiency of 25 when operating between two heat reservoirs. If the temperature of the cold reservoir is 300 K, what is the temperature of the hot reservoir?
 
  A) 375 K B) 450 K C) 400 K D) 350 K E) 500 K
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Leostella20

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


penguins

  • Member
  • Posts: 903
Reply 2 on: Jul 29, 2018
Gracias!

coreycathey

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Melting snow Melting snow
A gasoline testing kit, including an insulated container where water at 100°F is used to heat a ... A gasoline testing kit, including an insulated container where water at 100°F is used to heat a ...
Excess heat capacity chart Excess heat capacity chart
Time course for antibodies to the EBV viral–specific antigens. Time course for antibodies to the EBV viral–specific antigens.
Specific transport processes Specific transport processes
How much heat energy in Joules is required to heat 16.0 g of copper from 23.0 °C How much heat energy in Joules is required to heat 16.0 g of copper from 23.0 °C
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library