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Ann [662]
4 years ago
9

HELP ASAP

Physics
2 answers:
Scorpion4ik [409]4 years ago
8 0
The answer is B. helium-filled balloon, since sound travels the slowest through gases.
horsena [70]4 years ago
6 0
The answer is B. You’re welcome
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Why does a charged balloon stick to a neutral wall?
Jobisdone [24]
<span>When you bring a charged object, such as your balloon, near a neutral object that is classified as an insulator, than a temporary charge is induced in the neutral object. If the charged object is positive, then electrons in the neutral object will be attracted toward the charged object, creating a temporary imbalance of charges in the neutral object.</span>



7 0
3 years ago
What is the net force acting on an object that is not accelerating in the horizontal axis?
yuradex [85]

Answer:

.......................

Explanation:

A net force = unbalanced force. If however, the forces are balanced (in equilibrium) and there is no net force, the object will not accelerate and the velocity will remain constant.

8 0
3 years ago
A block with a mass of 1kg moving at a velocity of 3m/s collides and sticks to a block of mass of 4kg initially at rest. What is
Vsevolod [243]

Answer:using Newton third law

Let initial velocity of block be u1=3m/s

Mass of moving block m1 =1kg

Final velocity of block =V

Mass of stationary block m2= 4kg

Since they stick together, their final velocity will be the same.

m1u1 + m2u2=(m1+m2)v

(1*3)+(0*4)=(1+4)v

3=5v

Divide both sides by 5

V=0.6

Final velocity is 0.6m/s

Explanation:

8 0
3 years ago
Help me pls, the lesson is simple machines
Y_Kistochka [10]

Answer:

1.pulley,screw,inclined plane

2.using simple machine properly with right way and precautions

Explanation:

3.cuz if they are not used properly they can cause injuries to organs

8 0
3 years ago
Describe what we may observe from Earth regarding the moon’s revolution around the earth and its rotation
slava [35]

When we look at the moon from the Earth, we always see the same light spots, dark spots, and shapes. It never changes. There could be two possible reasons for this:

-- The moon is a flat disk with some markings on it, and one side of it always faces the Earth.

-- The moon is a round ball with some markings on it, and one side of it always faces the Earth.

Either way, since the same side always faces the Earth, the only way that can happen is if the moon's revolution around the Earth and rotation on its axis both take EXACTLY the same length of time.

Even if they were only one second different, then we would see the moon's whole surface over a long period of time. But we don't. So the moon's rotation and revolution must be EXACTLY locked to the same period of time.

4 0
3 years ago
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