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4 years ago

Explain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.

Physics

1 answer:

r-ruslan [8.4K]4 years ago

8 0

Answer:

The globular clusters can be found in regions that are free of interstellar dust and can be seen at large distances.

The globular clusters, molecular clouds, and atomic hydrogen can be found at almost distinctly he center of the galaxy.

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A weightlifter is holding a 200-kg barbell at a height of 1 meter

Tems11 [23]

Answer: 1960 joules

Explanation:

Given that:

Mass of barbell = 200-kg

Height = 1 meter

Work done by weightlifter = ?

Recall work is done when force is applied on an object over a distance.

i.e Workdone = Force X Distance h

(Since force = Mass m x gravitational acceleration g)

Workdone = mgh

= 200kg x 9.8ms^2 x 1m

= 1960 joules

Thus, 1960 joules of work is performed by the weightlifter.

6 0

3 years ago

Read 2 more answers

A circular saw spins at 6000 rpm , and its electronic brake is supposed to stop it in less than 2 s. As a quality-control specia

Alona [7]

Answer:

a. yes

Explanation:

The initial speed of the circular saw is:

$\dot n_{o} = \frac{6000}{60} \,\frac{rev}{s}$

$\dot n_{o} = 100\,\frac{rev}{s}$

Deceleration rate needed to stop the circular saw is:

$\ddot n = -\frac{100\,\frac{rev}{s} }{2\,s}$

$\ddot n = - 50\,\frac{rev}{s^{2}}$

The number of turns associated with such deceleration rate is:

$\Delta n = \frac{\dot n^{2}}{2\cdot \ddot n}$

$\Delta n = \frac{\left(100\,\frac{rev}{s} \right)^{2}}{2\cdot \left(50\,\frac{rev}{s^{2}} \right)}$

$\Delta n = 100\,rev$

Since the measured number of revolutions is lesser than calculated number of revolution, the circular saw meets specifications.

8 0

3 years ago

What two factors could the students change to investigate how to increase and decrease the magnetic force between the paperclip

scoundrel [369]

..............................................A

4 0

3 years ago

A free negative charge released in an electric field will

SashulF [63]

Answer:

Will experience a force due to electric field.

Explanation:

When a free negative charge is released in an electric field it experiences a force due to the electric field in a direction opposite to the direction of the magnetic field.

According to Coulomb's law this force is mathematically given as:

$F=E.q$

and, electric field due to a charge is given as:

$E=\frac{1}{4\pi.\epsilon_0}.\frac{q}{r^2}$

where:

permittivity of free space $\epsilon_0=8.85\times 10^{-12}\ m^{-3}.kg^{-1}.s^4.A^2$

q = magnitude of charge

r = radial distance from the charge

5 0

4 years ago

All of the following describe the motion of an object except

Lostsunrise [7]

All describe an objects motion except : mass

8 0

3 years ago