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4 years ago

What will a reflected light wave do?

Physics

1 answer:

iragen [17]4 years ago

6 0

Answer:

Reflection of Light. When light waves are incident on a smooth, flat surface, they reflect away from the surface at the same angle as they arrive. ... Regardless of whether light is acting as particles or waves, however, the result of reflection is the same.

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How many groups are in the modern periodic table?

nasty-shy [4]

Answer:

18 groups are in the modern periodic table

6 0

2 years ago

Read 2 more answers

the air in a tire is initially at 380 kpa, 20 C, when the tire volume is 0.120 m^3. as the tire is warmed by the sun, the pressu

castortr0y [4]

Answer:

final temperature is 364.32 K

mass of air is 0.5423 kg

Explanation:

given data

pressure p1 = 380 kPa

volume v1 = 0.120 m³

temperature = 20°C = 20 + 273 = 293 K

pressure p2 = 3450 kPa

volume v2 = 5% increase

to find out

final temperature and the mass

solution

we consider here ideal gas

so equation is

p1v1 / t1 = p2v2/t2

put here all value and find t2

and v2 is = 0.120 ( 1 + 0.05) = 0.126 m³

t2 = p2v2/ p1v1 × t1

t2 = (450 × 0.126) / (380 × 0.120) × 293

t2 = 364.32 K

so final temperature is 364.32 K

and

mass = p2v2 / Rt2

here R gas constant is 0.287 kJ/kg.K

mass = (450 × 0.126) / (0.287 × 364.32 )

mass = 0.5423

so mass of air is 0.5423 kg

7 0

3 years ago

A 25 kg child stands 2.5 m from the center of a frictionless merry‐go‐round, which has a 200 kg*m^2 moment of inertia and is spi

vodka [1.7K]

Answer:

Explanation:

a ) Time period T = 2 s

Angular velocity ω = 2π / T

= 2π / 2 = 3.14 rad /s

Initial moment of inertia I₁ = 200 + mr²

= 200 + 25 x 2.5²

=356.25

Final moment of inertia

I₂ = 200 + 25 X 1.5 X 1.5

= 256.25

b ) We apply law of conservation of momentum

I₁ X ω₁ = I₂ X ω₂

ω₂ = I₁ X ω₁ / I₂

Putting the values

$w_2=\frac{356.25\times3.14}{256.25}$

ω₂ = 4.365 rad s⁻¹

c ) Increase in rotational kinetic energy

=1/2 I₂ X ω₂² - 1/2 I₁ X ω₁²

.5 X 256.25 X 4.365² - .5 X 356.25 X 3.14²

= 684.95 J

This energy comes from work done against the centripetal pseudo -force.

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3 years ago

Which two criteria are least important for engineers to consider when

Zepler [3.9K]

Answer:

B C & D

Explanation:

should make you money, time well spent no time lost.

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3 years ago

Read 2 more answers

An object has 16 N of force being applied to the right, 16 N of force being applied to the left, and 6 N of force being applied

umka2103 [35]

Answer:

the net force on the object is 6 N.

Explanation:

Given;

force applied to the right on the object, $F_r$ = 16 N

force applied to the left of the object, $F_l$ = 16 N

force applied downward on the object, $F_d$ = 6 N

The net horizontal force on the object = $F_r - F_l = 16N -16N = 0$

The net vertical force on the object = $6 \ N \ downward$

The net force on the object is calculated as;

$F_{net}^2 = 6^2 + 0\\\\F_{net}^2 = 36\\\\F_{net} = \sqrt{36} \\\\F_{net} = 6 \ N$

Therefore, the net force on the object is 6 N.

7 0

3 years ago