Answer:
3.76 N
Explanation:
We are given that two force vectors point in opposite directions.
Let
Because second force act in opposite direction.
We have to find the magnitude of sum of two forces.
We know that triangle law of addition
Resultant sum=
Substitute the values then we get
Resultant sum of two forces=
Resultant sum of two forces=3.76 N
Hence, the magnitude of sum of two forces=3.76 N
Explanation:
Volume of 10 coins = 100ml - 75ml = 25ml
Volume of 1 coin = 25ml / 10 = 2.5ml
The average volume of each coin is 2.5ml.
Answer:
0.71%
Explanation:
We are given that
Error in each resistor=0.05 ohm
ohm
We have to find the maximum possible error in computing R.
Maximum possible error=
Substitute the values
Maximum possible error=%
Answer:
30m/s
Explanation:
Suppose there's no friction between the office chair and the floor. The only thing that impact the motion of the boy is the ejected carbon dioxide. We can apply the law of momentum conservation to find the his (the boy, the chair and the empty extinguisher) after the extinguisher is emptied.
Before the ejects, the system momentum is 0, due to at rest and no speed
After the ejects, momentum of the carbon dioxide is
9*20 = 180 kg m/s
The momentum of his is then
P + 180 = 0
P = -180
MV = -180
(26 + 16 + 18)V = - 180
V = -180/(26 + 16 + 18) = -30 m/s
So he would have a speed of 30m/s in the opposite of the ejected carbon dioxide direction
Answer:
W=1259W=1.2Kw
Explanation:
Hello!
The first step to solve is to find the enthalpies at the entrance (state 1) and the exit of the washer, for this we use the thermodynamic tables.
Through laboratory tests, thermodynamic tables were developed, these allow to know all the thermodynamic properties of a substance (entropy, enthalpy, pressure, specific volume, internal energy etc ..)
through prior knowledge of two other properties such as pressure and temperature.
state 1
h1(T=20C,P=1atm)=83.93kJ/kg
state 2
h1(T=23C,P=1atm)=96.48kJ/kg
now we find the mass flow remembering that it is the product of the flow rate by the density=
m= mass flow
q=flow=0.1l/S=0.0001M^3/s
α=Density=1000kg/m^3
m=0.1kg/s
Now we draw the energy flows in the washer (see attached image) and propose the first law of thermodynamics that states that the energy that enters must be equal to the one that comes out
where
m=mass flow
h=entalpy
v=speed
W=power input
g=gravity
H=height
SOLVING FOR W
W=1259W=1.2Kw