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vlada-n [284]
2 years ago
10

The mass after a physical change, such as ice melting into water, stays the same a. -true b. -false.

Physics
1 answer:
kupik [55]2 years ago
3 0

Answer:

Yes, it can be destroyed.The total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

Explanation:

hope this helps

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State one way to decrease the moment of a given force about a given axis of rotation.​
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Answer:

The moment of a given force about a given axis of rotation can be decreased by decreasing the perpendicular distance of force from the axis of rotation.

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Which medium will light travel through slowest? <br> 1.Solid<br> 2.Gas<br> 3.Empty Space
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It will travel slowest through gases.

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A 45.0 kg skier testing a new competitive ski wax drops off a ledge, goes into a crouch and goes straight down a slope of 10.0◦
Neko [114]

Answer:

v = 21.03 m/s

Explanation:

given,

mass of skier = 45 kg        

the slope of the snow = 10.0◦      

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distance traveled = 300 m      

speed = ?              

Acceleration = g sin θ - µ g Cos θ        

= 9.8 × Sin (10°) - 0.10 × 9.8 × Cos(10°)        

= 0.737 m/s²      

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v² = u² + 2 a s        

v² = 0 + 2 × 0.737 × 300            

v = 21.03 m/s                  

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6 0
3 years ago
Based on the reading which statement is FALSE?
zvonat [6]
The answer is the last option.
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3 years ago
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This is a Physics practice question. How do i solve it?
Elena-2011 [213]

Answer:

P = 140000 [Pa]

Explanation:

To solve this problem we must remember that pressure is defined as the relationship between Force on the area of a body.

In this particular problem, we are given the force acting on the upper surface of the block, including the force exerted by the atmospheric pressure.

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A = area = 0.25 [m²]

P = 3.5*10⁴/0.25

P = 140000 [Pa]

7 0
3 years ago
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