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Physics help !!

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holtadit:
Find attached the question paper.

I need someone to check my answers for:

Question 4

(a) Dont know the answer (b) prevents it from going in a straight line

(c) i) 1. 600 N , 2. 600 N
     ii) 150 N
     iii) 450 N
     iv)600 N  

Question 9

(c) i)  temp rise of water = 1.8 , temp fall of metal = 77.1
     ii) 1512 J
     iii) 392.2 J/Kg deg. Centigrade
     iv) the use of the stirrer could transfer more energy to the metal than assumed in the experiment

AND I DONT KNOW HOW TO DO THESE ONES

Question 10  part (c) (d) (e)
Question 11 (c) iii)

holtadit:
anyone?

astarmathsandphysics:
Gimme 5 mins

astarmathsandphysics:
4a)In the direction of the force

astarmathsandphysics:
I need someone to check my answers for:

Question 4

(a) Dont know the answer (b) prevents it from going in a straight line

(c) i) 1. 600 N , 2. 600 N
     ii) 150 N
     iii) 450 N
     iv)600 N 

Question 9

(c) i)  temp rise of water = 1.8 , temp fall of metal = 77.1
     ii) 1512 J
     iii) 392.2 J/Kg deg. Centigrade
     iv) the use of the stirrer could transfer more energy to the metal than assumed in the experiment

AND I DONT KNOW HOW TO DO THESE ONES

Question 10  part (c) (d) (e)
Question 11 (c) iii)


4b)I would have said forces acceleration towards centre of circle making it move in a circle
ciii)750 civ)600

9iv)incorrect. heat is lost tosurroundings.

10c)P=I^2R=2.5^2 *3=18.75W
d)P=IV s0 55000=I*22000 so I=2.5A
V=IR=2.5*3=7.5V

d)22000-7.5=2192.5V
11cii)emergency light for aicraft - it turns on if there is a fire to show the way out

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