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likoan [24]
3 years ago
13

If you break quartz to learn if it splits smoothly in a certain direction, what physical property are you testing?

Physics
2 answers:
IrinaVladis [17]3 years ago
4 0
Hope this helps!!!!!!!!!!

AveGali [126]3 years ago
3 0

Answer:

Cleavage

Explanation:

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Lena helps a child who is choking on his food. Which reliable method prepared her for helping with this injury?
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knowledge of first aid ... eg St John Ambulance, Red Cross etc. I think that everyone in a school should be taught First Aid.

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2 years ago
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A block of mass 0.08 kg is pushed against a spring with spring constant k=31 N/m. The spring is compressed 0.15 meters from its
ELEN [110]

Answer:

1.11 meters

Explanation:

As the spring is compressed, elastic potential energy is built up in the spring. The total elastic potential energy can be found using the following formula

Ep = 1/2 x k x s²          

where k = 31 N/m  (spring constant)

s = 0.15 m  (compression)

Ep = 3.4875 J

When the block of mass is released, the elastic potential energy (Ep) is converted to kinetic energy (Ek). From this we can find the initial velocity of the mass of block after release

Ek = 1/2 x m x u²    

   

where Ek = Ep = 3.4875J

m = 0.08 kg  (mass of block)

u = unknown (initial velocity)

u = 2.9526 m/s

Now that we know the initial velocity we need to find the deceleration of the mass of block due to friction. We will first find the force of friction from the following formula

F = ∪ x m x g          

where F = unknown (frictional force)

∪ = 0.4   (coefficient of friction)

m = 0.08 kg   (mass of block)

g = 9.81 m/s² (acceleration due to gravity)

F = 0.31392 N

From this force we calculate the deceleration based on the following formula

F = m x a                  

where F = 0.31392   (frictional force)

m = 0.08 kg   (mass of block)

a = unknown  (acceleration)

a = -3.924 m/s²      -

*the negative sign is due to this value being deceleration

Now to find the total distance traveled we use the equation for motion

v² = u² + 2as            

where  v = 0 (final velocity)

u = 2.9526 m/s (initial velocity

a = -3.924 m/s² (deceleration due to friction)

s = unknown (distance traveled)

s = 1.11 meters

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3 years ago
H e l p a h o m i e o u t t h a n k s
finlep [7]
Uh it’s D i’m pretty sure
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3 years ago
A baby elephant trots in a straight line along a river. The horizontal position of the elephant in meters over
mote1985 [20]

Answer:

Displacement -6

Distance 24

Explanation:

5 0
3 years ago
The primary neurotransmitter at the neuromuscular junction is
BabaBlast [244]

Answer:

acetylcholine

Explanation:

Acetylcholine is the neurotransmitter used by the motor neurons to stimulate action potentials in the muscle cells

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