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CIs 27 B?
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CIs 27 B?
The force in P=Fv is meant to be the resultant force. In this question, there is no mention of other forces so we take the resultant force as 180N.View attachment 64162
By ref to this question, plz explain that in the equation P=Fv, which force do we take
But we derive this equation from the equation of work right? So shouldn't the force be the one in the direction of work being done??The force in P=Fv is meant to be the resultant force. In this question, there is no mention of other forces so we take the resultant force as 180N.
That is true, but power is a scalar quantity so the direction of the force or velocity don't matter.But we derive this equation from the equation of work right? So shouldn't the force be the one in the direction of work being done??
A?This question makes no sense. Can someone solve it?
So they want the destination to be north of the bird's current location meaning that the resultant velocity must be vertically upwards. You draw a vector triangle based on the info that the resultant is directly upwards and the wind is blowing from the east. Then you use sin, cos or tan to find the angle. I would use sin since no further calculations would be needed to find the answer using sin. The angle will turn out to be 53, and you can determine the direction using your vector triangle(it will turn out to be west of north making the answer D).In still air, a bird can fly at a speed of 10 m s–1. The wind is blowing from the east at 8.0 m s–1. In which direction must the bird fly in order to travel to a destination that is due north of the bird’s current location?
A 37° east of north
B 37° west of north
C 53° east of north
D 53° west of north
It's C. The question is really weird
BB?i cant seem to understand these types of questions please help
Yup, answer is D because x=lamda(D)/a. So fringe separation is proportional to the lamda, so if you use a greater wavelength, you get greater fringe separation.Is ans DD? View attachment 64164
What if the width of the slits increased would that effect fringe separation?Yup, answer is D because x=lamda(D)/a. So fringe separation is proportional to the lamda, so if you use a greater wavelength, you get greater fringe separation.
The increase in current suggests that the total resistance of the circuit increased(R=V/I). Now the only way the resistance can increase is through the variable resistor. So the resistance of the variable resistor was increased, and you can determine how much pd it takes up using the potential divider formula,(r1/r1+r2)*Vtotal. You can use some values to figure out that the pd of the variable resistor would increase while pd for fixed resistor would decrease. So the voltmeter readings on Q increase and for P it decreases(B).i cant seem to understand these types of questions please help
Width of slits don't effect anything in the double slit formula. Width of the slits only impacts the intensity of the wave/fringes.What if the width of the slits increased would that effect fringe separation?
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