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defon
4 years ago
13

If a person has a dangerously high fever, submerging her in ice water is a bad idea, but an ice pack can help to quickly bring h

er body temperature down.
How many grams of ice at 0 degrees C will be melted in bringing down a 62kg patient's fever from 40 degrees C to 39 degrees C?
Physics
1 answer:
Elenna [48]4 years ago
7 0

Answer:

775 grams of ice

Explanation:

Heat loss by patient = heat gained by ice

Heat loss by patient = mass×specific heat capacity×(initial temperature - final temperature) = 62×4200×(40-39) = 260,400J

Heat gained by ice = mass × specific latent heat of fusion of ice = m×336000 = 336000m J

336000m = 260,400

m = 260400/336000 = 0.775kg = 0.775×1000 grams = 775 grams of ice

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Answer:

False

Explanation:

False, as a magnetic field is generated whenever current travels through a conductor.

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3 years ago
An ant travels 2.78 cm (West) and then turns and travels 6.25 cm (South 40 degrees East). What is the ant's total displacement?
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3 years ago
The difference between the frequency fff and the frequency ωωomega is that fff is measured in cycles per second or hertz (abbrev
Kisachek [45]

Answer:

Radians

Explanation:

The angular speed is a measure of the rotation speed of a body. It is defined as the angle rotated by a unit of time. Thus, It refers to the angular displacement per unit time and is designated by the Greek letter \omega. Its unit in the International System is radian per second (rad / s).

6 0
3 years ago
A horizontal uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hanging from it at the 20-cm mark and a 0.30
ElenaW [278]

Answer:

70 cm

Explanation:

0.5 kg at 20 cm

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x = Distance of the third 0.6 kg mass

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Torque about the support point is given by (torque is conserved)

0.5(50-20)=0.3(60-50)+0.6x\\\Rightarrow x=\dfrac{0.5(50-20)-0.3(60-50)}{0.6}\\\Rightarrow x=20\ cm

The position of the third mass of 0.6 kg is at 20+50 = 70 cm

7 0
3 years ago
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zavuch27 [327]

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3 years ago
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