The current is defined as the ratio between the charge Q flowing through a certain point of a wire and the time interval,
:
First we need to find the net charge flowing at a certain point of the wire in one second,
. Using I=0.92 A and re-arranging the previous equation, we find
Now we know that each electron carries a charge of
, 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:
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
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
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
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-)
