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4 years ago

Which galaxy type is smooth and uniform in appearance, where no new stars are forming?

Physics

1 answer:

Oksi-84 [34.3K]4 years ago

6 0

Answer: Elliptical galaxy

Explanation:

There are mainly three types of galaxies: Spiral, Elliptical and Irregular. Elliptical galaxies do not have any arms unlike spiral galaxies. The elliptical galaxies are smoother and uniform in appearance. These contain relatively old stars with any site of new star formation missing. In fact, scientists consider elliptical galaxies as those galaxies which are nearing the end of their evolution.

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What might happen when the function of the two remaining systems is affected. 1.Digestive System

nevsk [136]

Answer:

We will be effected not only with health, but also with our ability to carry out our genes to the next generation.

Explanation:

Our health is important, as we all know, so anything that happens to the digestive system will have a serious problem to our longevity, our reproductive system is also important to carry out our genes, and give birth to a new generation, it wouldn't effect us if only 1 person couldnt reproduce, but if everyone had a problem in their reproductive system, it would mean the extinction of all humanity.

5 0

3 years ago

A jar of tea is placed in sunlight until it

Tanzania [10]

Answer:

m = 4.44 [g]

Explanation:

This is a problem related to heat transfer and thermodynamics. The second law of thermodynamics tells us that heat goes in only one direction, from the highest temperature substance to the lowest temperature. In this case the heat goes from tea to ice. The heat transfer process could be defined as the heat rejection of one body will be equal to the Heat received by another body.

$Q_{out}=Q_{in}\\Q_{out}=m*cp*(T_{f}-T_{i})$

Where:

m = mass = 177[g] = 0.177[kg]

Cp = specific heat = 4186 [J/kg*C]

T_f = 29.1 [°C]

Ti = 31.1 [°C]

Q = 0.177*4186*(29.1 - 31.1)

Q = - 1481.8 [J]

Note: The negative sign means that the heat is rejected.

Recall that the heat rejected is equal to the heat transferred

As the ice is going through a phase change, the fusion latent heat should be used, i.e. when it passes from solid to liquid. The heat transfer for this process is calculated with the following expression.

Qin = m *hf

m = mass of the ice [kg]

hf = Fusion latent heat = 333700 [J/kg]

1481.8 = m * 333700

m = 0.00444 [kg] = 4.44 [g]

7 0

4 years ago

3. A snowmobile has a mass of 2.25 x 102 kg. A constant force is exerted on it for 50.0 s. The snowmobile’s initial velocity is

Art [367]

Answer:

a. m(v-u)

momentum =5175kgm/s

b. 103.5N

3 0

3 years ago

The wheel of a car has a radius of 20.0 cm. It initially rotates at 120 rpm. In the next minute it makes 90.0 revolutions. (a) W

just olya [345]

Answer:

Explanation:

Given that,

Radius of the wheel, r = 20 cm = 0.2 m

Initial speed of the wheel, $\omega_i=120\ rpm=753.98\ rad/s$

Displacement, $\theta=90\ rev=565.48\ rad$

To find,

The angular acceleration and the distance covered by the car.

Solution,

Let $\alpha$ is the angular acceleration of the car. Using equation of rotational kinematics as :

$\theta=\omega_i t+\dfrac{1}{2}\alpha t^2$

$565.48=753.98\times 60+\dfrac{1}{2}\alpha (60)^2$

$\alpha =-24.81\ rad/s^2$

Let t is the time taken by the car before coming to rest.

$t=\dfrac{\omega_f-\omega_i}{\alpha }$

$t=\dfrac{0-753.98}{-24.81}$

t = 30.39 seconds

Let v is the linear velocity of the car. So,

$v=r\times \omega_i$

$v=0.2\times 753.98$

v = 150.79 m/s

Let d is the distance covered by the car. It can be calculated as :

$d=v\times t$

$d=150.79\ m/s\times 30.39\ s$

d = 4582.5 meters

d = 4.58 km

5 0

3 years ago

Describe an experiment to show that air support burning

noname [10]

Take a small burning candle. ... After few minutes the candle is extinguished. As the supply of air is stopped due to glass jar the burning of candle is also stopped. This experiment proves that air supports burning.

3 0

3 years ago