Physics help !!

[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

[holtadit]

How did u get 10 (C) ? You gave me an answer of 18.75 W when they ask for the loss in energy.... are u sure this is correct ?

Do you by any chance have the ms for this paper.

[astarmathsandphysics]

V=ir=2.5*3=7.5 then p=iv=2.5*7.5