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3 years ago

A compass in a magnetic field will line up __________.

Physics

1 answer:

Klio2033 [76]3 years ago

4 0

Answer:

Option c

Explanation:

Magnetic field lines form loops starting from north pole to south pole outside the magnet and from south pole to north pole inside the magnet.

Thus the field is such that it is directed outwards from the North pole and directed inwards to the South pole of the magnet.

A compass in a magnetic field will will comply with the magnet's North pole directing towards the magnetic field.

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The specific heat of water in its solid phase (ice) is 2090 J/(kg K), while in the liquid phase (water) its specific heat is 419

oee [108]

Answer:

d. 149 ⁰C.

Explanation:

Given;

mass of the block of ice, m = 2 kg

specific heat capacity of the ice, C = 2090 J/(kgK)

initial temperature of the ice, t₁ = -90 ⁰C

heat added to the ice, H = 1,000,000 J

let the final temperature of the ice = t₂

The final temperature of the ice after adding the heat is calculated as follows;

$H = mC_{ice} \Delta t\\\\H = mC_{ice} (t_2 - t_1)\\\\1,000,000 = 2 \times 2090 \times (t_2 - (-90))\\\\1,000,000 = 4,180(t_2 +90)\\\\1,000,000 = 4,180t_2 + 376,200\\\\1,000,000 - 376,200 = 4,180t_2\\\\623,800 = 4,180 t_2\\\\t_2 = \frac{623,800}{4,180} \\\\t_2 = 149 \ ^0C$

Therefore, the new temperature of the water is 149 ⁰C.

4 0

3 years ago

If you increase the distance by double the work will _____________

VMariaS [17]

Answer: the work will also increase by double

Explanation:

This is because they are directly proportional in the formula w=f x d

6 0

4 years ago

Pls help me i have to submit this due tomorrow :'D

aniked [119]

$\textsf {a) As there is no change in the initial and final positions, the displacement is}\\\textsf {equal to 0.}$

b) Finding total distance :

Distance travelled from 0 s to 5 s :

1/2 x 5 x 30 = 75 m

Distance travelled from 5 s to 10 s :

5 x 30 = 150 m

Distance travelled from 10 s to 15 s :

150 + 1/2 x 5 x 5
150 + 12.5 = 162.5 m

Distance travelled from 15 s to 20 s :

36 x 5 + 1/2 x 5 x 4
180 + 10 = 190 m

Distance travelled from 20 s to 25 s :

45 x 5 + 1/2 x 5 x 5
225 + 12.5 = 237.5 m

Distance travelled from 25 s to 30 s :

40 x 5 + 1/2 x 10 x 5
200 + 25 = 225 m

Distance travelled from 30 s to 35 s :

20 x 5 + 1/2 x 20 x 5
100 + 50 = 150 m

Distance travelled from 35 s to 40 s :

1/2 x 20 x 5
50 m

Total = 75 + 150 + 162.5 + 190 + 237.5 + 225 + 150 + 50

Total = 1240 m

c) velocity at t = 15 s

36/15
12/5
2.4 m/s

d) average velocity

0 m/s (as displacement is equal to 0)

e) average speed

1240/40
31 m/s

f) Part d uses displacement whereas part e uses distance

3 0

2 years ago

Gina is driving her car to work, but she’s stopped at a red light. When the light turns green, she presses the gas pedal and acc

Alex777 [14]

The net force of the car is greater than zero in the horizontal direction. If it were not greater thn zero, then the vehicle would remain stationary.

8 0

3 years ago

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Imagine a sunny day at the pool. The sun is out and you are thinking about how the light travels from the sun and then hits the

Dovator [93]

Answer:

it evaporats

Explanation:

because the sun is so hot that the water will turn into gas hope i helped

5 0

4 years ago

Read 2 more answers