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kap26 [50]
3 years ago
15

Can someone please help me? Anyone? PLEASE:(

Physics
1 answer:
tatuchka [14]3 years ago
8 0

Answer:

There's no question-

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A vehicle travels from a 30m marker to a 100m marker. What is the change in distance?
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The change in distance is 30 because if you subtract both number you'll get 30
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2. A solid plastic cube of side 0.2 m is submerged in a liquid of density 0.8 hgm calculate the
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Answer:

vpg = 0.064 N

Explanation:

Upthrust = Volume of fluid displaced

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hope it helps.

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What type of triangle measures 8 inches,8 inches,3 inches
kykrilka [37]

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isoceles

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3 years ago
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A light ray incident from medium 1 to medium 2, where n1>n2. When the incident angle exceed the critical angle ac, the refrac
vovikov84 [41]

Explanation:

(a)

Critical angle is the angle at the angle of refraction is 90°. After the critical angle, no refraction takes place.

Using Snell's law as:

n_1\times {sin\theta_i}={n_2}\times{sin\theta_r}

Where,  

{\theta_i}  is the angle of incidence

{\theta_r} is the angle of refraction = 90°

{n_2} is the refractive index of the refraction medium

{n_1} is the refractive index of the incidence medium

Thus,

n_1\times {sin\ \theta_{critical}}={n_2}\times{sin\ 90^0}

The formula for the calculation of critical angle is:

{sin\theta_{critical}}=\frac {n_2}{n_1}

Where,  

{\theta_{critical}} is the critical angle

(b)

No it cannot occur. It only occur when the light ray bends away from the normal which means that when it travels from denser to rarer medium.

7 0
3 years ago
A 21.7kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.2m/s. How much thermal energy due to frictio
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Answer:

Subtract the kinetic energy at the bottom from the potential energy loss. The remainder becomes frictional heat.

Potential energy loss:

M g H = 21.7*9.81*3.5 = 745.1 J

Kinetic energy at bottom of slide:

= (1/2) M v^2 = 52.5 J

5 0
3 years ago
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