The path of a beam of light from the sun to your eye when you are wearing sunglasses

PLEASE HELP!!!! :D When you look at the Sun through a filtered telescope, the visible portion of the Sun appears blotchy.

olya-2409 [2.1K]

<span>When an individual looks through a filtered telescope in which he or she observes the sun, the portion where it appears blotchy is likely to be called the sunspots while the layer of the sun where it shows where it occurs is called the photosphere.</span>

5 0

4 years ago

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A curve of radius 55.1 m is banked so that a car of mass 1.6 Mg traveling with uniform speed 61 km/hr can round the curve withou

svp [43]

Answer:

θ = 28°

Explanation:

For this exercise We will use the second law and Newton, let's set a System of horizontal and vertical.

X axis

Fₓ = m a

Nₓ = m a

Where the acceleration is centripetal

a = v² / r

The only force that we must decompose is normal, let's use trigonometry

sin θ = Nₓ / N

cos θ = $N_{y}$ / N

Nₓ = N sin θ

$N_{y}$ = N cos θ

Let's replace

N sin θ = m v² / r

Y Axis

$N_{y}$ - W = 0

N cos θ = mg

Let's divide the two equations of Newton's second law

Sin θ / cos θ = v² / g r

tan θ = v² / g r

θ = tan⁻¹ (v² / g r)

We reduce the speed to the SI system

v = 61 km / h (1000 m / 1 km) (1h / 3600 s) = 16.94 m / s

Let's calculate

θ = tan⁻¹ (16.94 2 / (9.8 55.1)

θ = tan⁻¹ (0.5317)

θ = 28°

3 0

3 years ago

13. Calculate the total heat energy in Joules needed to convert 20 g of substance X from -10°C to 70°C?

sergeinik [125]

The heat required to convert the unknown substance X from one phase to another is 1600 J times the specific heat of that substance.

Explanation:

The heat energy required to convert a substance or to heat up or increase the temperature of a substance can be obtained from the specific heat formula.

As per this formula, the heat energy applied should be equal to the product of mass of the substance with temperature gradient and also with specific heat of the substance. Basically, the heat provided to increase or convert a substance should be more than the specific heat of the substance.

$Q = mc del T$