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expeople1 [14]
4 years ago
5

I NEED HELP ASAP

Physics
1 answer:
SashulF [63]4 years ago
4 0

Answer:

The age, distribution, and composition of the stars in a galaxy trace the history, dynamics, ... Our Sun will stay in this mature phase ... The smallest stars, known as red dwarfs, may contain as little as 10% the ... of energy production, they fade into oblivion as they gradually cool down.

Explanation:

hmu if yah need more help! :)

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A current of 0.92 a flows in a wire. how many electrons are flowing past any point in the wire per second? the charge on one ele
Fantom [35]
The current is defined as the ratio between the charge Q flowing through a certain point of a wire and the time interval, \Delta t:
I= \frac{Q}{\Delta t}
First we need to find the net charge flowing at a certain point of the wire in one second, \Delta t=1.0 s. Using I=0.92 A and re-arranging the previous equation, we find
Q=I \Delta t= (0.92 A)(1.0 s)=0.92 C

Now we know that each electron carries a charge of e=1.6 \cdot 10^{-19} C, so if we divide the charge Q flowing in the wire by the charge of one electron, we find the number of electron flowing in one second:
N= \frac{Q}{q} = \frac{0.92 C}{1.6 \cdot 10^{-19} C}=5.75 \cdot 10^{18}
3 0
3 years ago
What is the mass of a cannonball if a force of 2,500 N gives the cannonball an acceleration of 200m/s2?
pentagon [3]
Newton's 2nd law of motion:

                         Force = (mass) x (acceleration)

Divide each side
by 'acceleration':      Mass  =  (force) / (acceleration)

                                       =  (2,500 N)  /  (200 m/s²)

                                       =    12.5 kg
8 0
4 years ago
Read 2 more answers
A ship's boiler steam comes out at 112 C and pushes through the system, exiting into the condenser,
solniwko [45]

Answer:

D: 0.239

Explanation:

Equation for ideal efficiency is;

η = 1 - (T_c/T_h)

We are told that;

steam comes out at 112° C. Thus, T_h = 112°C. Converting to Kelvin gives; T_h = 112 + 273 = 385 K

The one exiting into the condenser is kept at 20°C. Thus; T_c = 20 + 273 = 293 K

Thus;

η = 1 - (293/385)

η = 0.239

5 0
3 years ago
you leave your house and travel for 6 minutes at an average velocity of 5 m/s. How far have you traveled?​
Anvisha [2.4K]

Answer:

1800 m

Explanation:

This question requires you to calculate the distance traveled after 6 minutes at a speed of 5m/s

Given speed as 5m/s and time is 6 minutes then;

Change minutes to seconds by multiplying the minutes by 60 seconds

1 minute=60 seconds

6 minutes= 6*60 = 360 seconds

Apply the formula for speed where;

S=D/T where S is speed, D is distance and T is time

To get D , rewrite formula as S*T

where S= 5m/s and T=360s

D= 5*360 =1800m

3 0
4 years ago
Which of the following phase changes occurs at point B on the phase diagram shown below? (choose all that apply)
Alex
I’m just gonna try an wander the the best I can, sorry if this is wrong I haven’t been taught this subject yet-

I’m Guessing its sublimating

( I’m sorry if this is wrong, remember I haven’t been taught this yet I’m only in 6th-)
4 0
3 years ago
Read 2 more answers
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