2 years ago

An object experiences a 8.9 N force and accelerates 6 m/sec2. What is the object's

Physics

1 answer:

Inessa [10]2 years ago

3 0

b stupidrwfs

planation:

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A 25 kg child is riding on a swing. If the child travels 8.9 m/s at the bottom of their swing, how high into the air is the chil

Setler [38]

Answer:

h = 4.04 m

Explanation:

Given that,

Mass of a child, m = 25 kg

The speed of the child at the bottom of the swing is 8.9 m/s

We need to find the height in the air is the child is able to swing. Let the height is h. Using the conservation of energy such that,

$mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}$

Put all the values,

$h=\dfrac{(8.9)^2}{2\times 9.8}\\\\h=4.04\ m$

So, the child is able to go at a height of 4.04 m.

7 0

2 years ago

In a double-slit experiment, the slits are illuminated by a monochromatic, coherent light source having a wavelength of 609 nm.

Ray Of Light [21]

Answer:

$\Delta x = 3.65 \mu m$

Explanation:

As we know that the sixth order maximum will have path difference given as

$\Delta x = N\lambda$

here we know that

N = order of maximum

$\lambda = 609 nm$

now we have

$N = 6$

so we know that

$\Delta x = 6(609 nm)$

$\Delta x = 3.65 \mu m$

6 0

2 years ago

The rigid link is supported by a pin at A and two A-36 steel wires, each having an unstretched length of 12 in. and cross-sectio

Leokris [45]

Answer:

Extension of the wire is not indicated

Explanation:

Young modulus (YM)= (stress/Strain); Tensile Stress/tensile Strain

=> YM *Strain =Stress=F/A; A is cross sectional area and F is the force

(YM * Strain * A)/36 =F (Force developed in each wire)

F = (350 *e*0.0125)/12

4 0

2 years ago

What could damage the eardrum and bones of the middle ear?

klio [65]

Answer:

B or D

Explanation:

I wanna say B but I don't really know if it's a trick question

my explanation for D is that anvils are usually 110 decibles and ear drums usually are damaged when exposed to 82dbs or higher at a consistant rate so I'd imagine that'd be the answer I hoped this helped

8 0

2 years ago

The diagram shows a pencil in a glass of water.

RoseWind [281]

B. Refraction causes this to happen.

Hope this helps!!

6 0

3 years ago

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