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3 years ago

Which numbered angle represents the angle of incidence?

Physics

2 answers:

Anastasy [175]3 years ago

8 0

1 the angle of incidence is always the angle that comes into the mirroe

pychu [463]3 years ago

6 0

Answer:

1 numbered angle represents the angle of incidence.

Explanation:

Angle of incidence is defined as the angle between the incident ray on the surface and the perpendicular line to that surface. The perpendicular line to that surface is called as normal. It can be seen from figure that the angle between the incident ray and normal to surface is numbered 1.

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Describe three events you cannot explain.

Taya2010 [7]

There are many things in this feeble world that our species are incapable of comprehending such as what lies beyond our galaxy

what is the meaning of life

and most importantly why doesnt my dad love me

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3 years ago

Please answer me fast

meriva

Answer: i think c

Explanation:QA: “What is ordinary glass made of ?”

Glass is mostly silica, or silicon dioxide, present as quartz in many types of sand. Pure silica forms a highly transparent glass, but has a very high melting or softening temperature, around 1700°C. Even at such high temperatures it is highly viscous and difficult to work. Its use is largely confined to applications requiring high transparency to ultra-violet and infra-red radiation, stability at elevated temperatures or low thermal expansion coefficient.

“Ordinary glass” windows and drinking vessels are typically made from soda-lime glass, containing silica with around 25% sodium, calcium and other oxides, which together reduce the softening temperature to roughly 500–600°C

6 0

3 years ago

A research submarine has a 30-cm-diameter window that is 8.6 cm thick. The manufacturer says the window can withstand forces up

slega [8]

First solve the area of the ow the window os the submarine

A = pi* (0.15)^2= 0.0707 m2

The pressure it can with stand is

P= F/A = 1.2x10^6 N/ 0.0707 m2 = 16976527.26 Pa

Using the formala

P = pgh

Where p is the density of water

G is the accelartion due to gravity

H is the depth

H = P/pg

=16976527.26 Pa/ (1000 kg/m3)(9.81 m/s2)

H = 1730.53 m

3 0

3 years ago

A bucket that has a mass of 20 kg when filled with sand needs to be lifted to the top of a 15 meter tall building. You have a ro

prohojiy [21]

Answer:

work done lifting the bucket (sand and rope) to the top of the building,

W=67.46 Nm

Explanation:

in this question we have given

mass of bucket=20kg

mass of rope= $.2\frac{kg}{m}$

height of building= 15 meter

We have to find the work done lifting the bucket (sand and rope) to the building =work done in lifting the rope + work done in lifting the sand

work done in lifting the rope is given as, $W_{1}=Force \times displacement$

= $\int\limits^{15}_0 {.2x} \, dx$ ..............(1)

= $.1\times 15^2$

=22.5 Nm

work done in lifting the sand is given as, $W_{2}=Force \times displacement$

$W_{2}=\int\limits^{15}_0 F \, dx$ .................(2)

Here,

F=mx+c

here,

c=20-18

c=2

m= $\frac{20-18}{15-0}$

m=.133

Therefore,

$F=.133x+2$

Put value of F in equation 2

$W_{2}=\int\limits^{15}_0 (.133x+2) \, dx$

$W_{2}=.133 \times 112.5+2\times15\\W_{2}=14.96+30\\W_{2}=44.96 Nm$

Therefore,

work done lifting the bucket (sand and rope) to the top of the building, $W=W_{1}+W_{2}$

W=22.5 Nm+44.96 Nm

W=67.46 Nm

4 0

4 years ago

The distance between a seismological recording station and the earthquake source is determined from the ________. The distance b

AURORKA [14]

Answer:

Arrival times of P and S waves

Explanation:

Seismological recording station has a seismometer that senses that motion in the ground, a clock that records time and a data recorded.

The distance between beginning of the first P wave and the first S wave will give you the time the waves are apart.This time value will be used to find the distance between the seismograph and the epicenter of earthquake and you mark it.This is corresponding distance in km to the time in seconds obtained before.You then find the amplitude of the strongest wave and mark it on the right side of chart.Amplitude is the height on paper of the strongest wave.Using a ruler join the amplitude point and the point where you marked the distance to epicenter.This line will cross the magnitude chart at a point which represents the magnitude of the Earthquake.

5 0

4 years ago