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vfiekz [6]
4 years ago
8

(This may not be Physics!!!) Why does an ice cube melt when held in someone's hand?

Physics
1 answer:
VLD [36.1K]4 years ago
6 0

Because the heat from your hand is leaving your hand and going into the ice cube which makes it melt and since th heat is leaving your hand your hand feels cold.

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How many significant figures are there in the measurement (4.07×10^17m)
Alex17521 [72]

Answer:

2...................

6 0
3 years ago
A 90-kg astronaut is stranded in space at a point 6.0 m from his spaceship, and he needs to get back in 4.0 min to control the s
Stella [2.4K]

Momentum = 0.5 * 4 = 2 
to conclude the man’s velocity after he throws the piece of equipment, divide this number by the man’s mass. 

v = 2/90 

This is about 0.0222 m/s. To know if he can move 6 meters at velocity in 4minutes, use the following equation. 

d = v * t, t = 4 * 60 = 240 s 
d = 2/90 * 240 = 5⅓ meters. 

This is ⅔ of a meter from the spaceship. To know the velocity that he must have to move 6 meter, use the same equation. 

6 = v * 240 
v = 6/240 
This is about 0.00416 m/s. 
His final momentum = 90 * 6/240 = 2.25 


To know the velocity of the package, divide this number by the mass of the package. 
v = 2.25/0.5 = 4.5 m/s

8 0
3 years ago
A balloonist drops his camera from a height of 100 m while his balloon is ascending at 5 m/s. How
ExtremeBDS [4]
20 i think is the answer
6 0
3 years ago
A rocket is launched and the observer measuring the rocket altitude is standing at a distance of 200 feet from the launcher. Whe
Gre4nikov [31]

Answer:

100 foot

Explanation:

Using the formula for calculating range to calculate the speed first as shown;

<h3>Range R = U²sin 2theta/g</h3>

U is the speed

theta is the observe angle

g is the acceleration due to gravity.

200 = U²sin 2(45)/9.8

Usin90 = 200 * 9.8

U² = 1960

U = √1960

U = 44.27 m/s

Get the required altitude

Altitude H = u²/2g

H = 44.27²/2(9.8)

H = 1,959.8329/19.6

<em>H = 99.99 feet</em>

<em>Hence the altitude of the rocket to the nearest foot is 100 foot</em>

7 0
3 years ago
All types of mass movement are caused by the force of
PilotLPTM [1.2K]

Answer:

Mass and Acceleration

Explanation:

The typical Force equation is:

F = ma

where m = mass, and a=acceleration.

6 0
3 years ago
Read 2 more answers
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