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Sav [38]
3 years ago
7

What is instantaneous acceleration?

Physics
2 answers:
Eva8 [605]3 years ago
7 0

Explanation:

Instantaneous acceleration is the acceleration at a particular instant.  Mathematically, it is the first derivative of velocity, dv/dt.

Average acceleration, on the other hand, is the acceleration over a period of time.  It is the change in velocity divided by the length of time, Δv/Δt.

KengaRu [80]3 years ago
3 0

Answer:

how fast the car goes

Explanation:

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2. What do pitch and loudness have in common?
DanielleElmas [232]

Answer:

Both are subject to a persons interpretation

Explanation:

We hear people describe this when somebody is making an irresistible sound. usually people say the baby has a pitch scream.

5 0
2 years ago
How do intrusive igneous rocks differ from extrusive igneous rocks?
Nutka1998 [239]
Intrusive rocks are formed beneath the earth's surface and extrusive igneous rocks are formed beneath the earth's surface but cool quicken than intrusive igneous rocks<span />
6 0
3 years ago
Two identical metal spheres a and b are in contact. both are initially neutral. 1.0×1012 electrons are added to sphere a, then t
NeX [460]
Metal is conductive, so electrons will transfer onto sphere b until there is an equal number of electrons on either sphere (the electrical gradient will be zero). This means that 5 x 10^11 electrons will be on either sphere, and since the charge of an electron is 1.602 x 10^-19 Coulombs, multiplying this by the number of electrons gives a charge of 8.01 x 10^-8 Coulombs, or 80.1 nanocoulombs.
7 0
3 years ago
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4: in the cabin of a jetliner that cruises at 600 km/h, a pillow drops from an overhead rack. does a passenger walking down the
Lelu [443]
I think it does matter because when the pillow is in contact to the cabin it is also at a velocity of 600 km/h, but as soon as it leaves the contact of the cabin, inertia tries to slow it down and the passenger being at 600 km/h has a risk of getting hit by it.
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3 years ago
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A stationary 25 kg object is located on a table near the surface of the earth. The coefficient of static friction between the su
s344n2d4d5 [400]

The net vertical force on the object is

∑ F[vertical] = n - mg = 0

where n is the magnitude of the normal force exerted by the surface, m is the object's mass, and g is the mag. of acceleration due to gravity. It follows that

n = mg = (25 kg) (9.8 m/s²) = 245 N

The net horizontal force is

∑ F[horizontal] = 300 N - f = ma

where f is the mag. of friction and a is the object's acceleration.

We have

f = µn

where µ is the coefficient of friction. Since the object starts at rest, it won't move and accelerate unless the applied force of 300 N is sufficient to overcome the maximum static friction, which is

f = 0.50 n = 0.50 (245 N) = 122.5 N

Since f < 300 N, the box will begin to slide, at which point the coefficient of kinetic friction kicks in and the mag. of friction is

f = 0.30 n = 0.30 (245 N) = 73.5 N

Now solve for a :

300 N - 73.5 N = (25 kg) a

a = (226.5 N) / (25 kg)

a = 9.06 m/s² ≈ 9.1 m/s²

4 0
2 years ago
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