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4 years ago

Two stars that are in the same constellation:

Physics

2 answers:

Kitty [74]4 years ago

6 0

Answer:

Explanation:

Constellations are stellar patterns which are made out of bright stars which appears close to each other and can form a recognisable pattern.

But that does not mean these stars are actually close to each other. The sky that we see from Earth appears as a 2D representation of a 3D Space. If you look in a particular direction in sky you will see all the stars in that direction irrespective of their actual distance from the Earth and hence these stars can be practically very far from each other too.

Nata [24]4 years ago

6 0

Answer:

Explanation:

Constellations are astronomical formations consisting of bright stars that appear near one another and can form a sequence that can be identified.

But that doesn't mean that such stars are similar to each other. The view we see in the sky from Earth is a 2 Dimensional depiction of a 3 Dimensional Space. When we gaze in a specific direction in the night sky, we will see all the stars in that direction, regardless of their actual distance from the Earth, and therefore these stars can also be extremely far from each other.

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A projectile is launched from the surface of a planet (mass = 15 x 1024 kg, radius = R = 9.6 x 106 m). What minimum launch speed

Serjik [45]

Answer:

The minimum launch speed is 13366.40 m/s.

Explanation:

Given that,

Mass of planet $M=15\times10^{24}\ kg$

Radius $R= 9.6\times10^{6}\ m$

Height = 6R

We need to calculate the speed

Using relation between gravitational force and total energy

$-\dfrac{GMm}{6R+R}=\dfrac{1}{2}mv^2-\dfrac{GMm}{R}$

$\dfrac{}{}mv^2=\dfrac{GMm}{7R}-\dfrac{GMm}{R}$

$\dfrac{1}{2}mv^2=\dfrac{6GMm}{7R}$

$v^2=\dfrac{2\times6GM}{7R}$

Put the value into the formula

$v=\sqrt{\dfrac{2\times6\times6.67\times10^{-11}\times15\times10^{24}}{7\times9.6\times10^{6}}}$

$v=13366.40\ m/s$

Hence, The minimum launch speed is 13366.40 m/s.

6 0

3 years ago

Read 2 more answers

A platinum resistance thermometer has a resistance of 11.50 ohms at 0 oC and 17.35 ohms at 100 oC. Assuming that the resistance

STatiana [176]

Answer:

$34.2^{\circ}C$

Explanation:

The resistance increases linearly with the temperature - so we can write:

$\Delta R = k \Delta T$

where

$\Delta R$ is the change in resistance

k is the coefficient of proportionality

$\Delta T$ is the variation of temperature

In the first part of the problem, we have

$\Delta R = 17.35 - 11.50 =5.85\Omega$

$\Delta T = 100 -0 = 100^{\circ}C$

So the coefficient of proportionality is

$k=\frac{\Delta R}{\Delta T}=\frac{5.85}{100}=0.0585 \Omega ^{\circ}C^{-1}$

When the resistance is $R=13.50\Omega$ , the change in resistance with respect to the resistance at zero degrees is

$\Delta R' = 13.50-11.50 = 2.00 \Omega$

So we can find the change in temperature as:

$\Delta T' = \frac{\Delta R}{k}=\frac{2.00}{0.0585}=34.2^{\circ}$

So the new temperature is

$T_f = T_0 + \Delta T' = 0+34.2 = 34.2^{\circ}C$

4 0

3 years ago

1. Nyatakan prinsip Bernoulli.

nignag [31]

Answer:

prinsip bernoulli

Explanation:

Prinsip Bernoulli adalah sebuah istilah di dalam mekanika fluida yang menyatakan bahwa pada suatu aliran fluida, peningkatan pada kecepatan fluida akan menimbulkan penurunan tekanan pada aliran tersebut. Prinsip ini sebenarnya merupakan penyederhanaan dari Persamaan Bernoulli yang menyatakan bahwa jumlah energi pada suatu titik di dalam suatu aliran tertutup sama besarnya dengan jumlah energi di titik lain pada jalur aliran yang sama. Prinsip ini diambil dari nama ilmuwan Belanda/Swiss yang bernama Daniel Bernoulli.

6 0

3 years ago

What is an Adaptation?

Semenov [28]

1.Adaptation is the action or process of adapting or being adapted.
2. a movie, television drama, or stage play that has been adapted from a written work, typically a novel.
3. a change or the process of change by which an organism or species becomes better suited to its environment.
Hope I helped! :P

5 0

3 years ago

A car travels straight for 20 miles on a road that is 30° north of east. What is the east component of the car’s displacement to

Virty [35]

17.3 would be the correct answer.

4 0

3 years ago

Read 2 more answers