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4 years ago

Fill in the blanks

Physics

1 answer:

just olya [345]4 years ago

4 0

Answer:

An atom that loses a electron is called a cation and has an overall positive charge.

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A centrifuge in a medical laboratory rotates at an angular speed of 3,500 rev/min, clockwise (when viewed from above). When swit

Ratling [72]

Answer:

The magnitude of angular acceleration is $232.38\ rad/s^2$ .

Explanation:

Given that,

Initial angular velocity, $\omega_i=3500\ rev/min=366.5\ rad/s$

When it switched off, it comes o rest, $\omega_f=0$

Number of revolution, $\theta=46=289.02\ rad$

We need to find the magnitude of angular acceleration. It can be calculated using third equation of rotational kinematics as :

$\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{-(366.51)^2}{2\times 289.02}\\\\\alpha =-232.38\ rad/s^2$

So, the magnitude of angular acceleration is $232.38\ rad/s^2$ . Hence, this is the required solution.

6 0

3 years ago

List at least three things that can happen as plate spread apart.

Nookie1986 [14]

Centre of Mass then axis of rotation and then moment of inertia. This was the toughest question for your level... happy to help ^_^. It was purely experimental question.

8 0

3 years ago

Hi please answer and show your work

jek_recluse [69]

Answer:

$\huge\boxed{\sf P.E. = 240\ MJ}$

$\huge\boxed{\sf K.E. = 19.6\ MJ}$

Explanation:

<u>Given:</u>

Mass = m = 200,000 kg

Vertical Distance = h = 120 m

Speed = v = 14 m/s

Acceleration due to gravity = g = 10 m/s²

<u>Required:</u>

1) Gravitational Potential Energy = P.E = ?

2) Kinetic Energy = K.E. = ?

<u>Formula:</u>

1) P.E. = mgh

2) K.E. = $\displaystyle \frac{1}{2} mv^2$

<u>Solution:</u>

1) P.E. = (200,000)(10)(120)

P.E. = 240,000,000 Joules

P.E. = 240 Mega Joules

P.E. = 240 MJ

2) K.E. = 1/2 (200000)(14)^2

K.E. = (100000)(196)

K.E. = 19,600,000 Joules

K.E. = 19.6 MJ

$\rule[225]{225}{2}$

Hope this helped!

4 0

3 years ago

Electromagnetic wav

krek1111 [17]

Answer:

I dont get what your asking sorry boo

Explanation:

6 0

3 years ago

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If no heat is lost to the surroundings, how much heat must be added to raise the temperature from 18.0 ∘C to 88.0 ∘C ?

artcher [175]

no one cares bout ur answer kid

7 0

4 years ago