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otez555 [7]
4 years ago
12

How do thermometers work?

Physics
2 answers:
lozanna [386]4 years ago
7 0

Answer:

the answer is "B"

Explanation:

Thermometer has either alcohol or mercury, has some reaction when it meets heat. When a thermometer meets heat the liquid substance in the thermometer expands or has thermal expansion. the thermometer measures the kinetic energy of the particles in a object.

Charra [1.4K]4 years ago
6 0
The right answer is b
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If a = 2.0 cm, b = 5.0 cm, and i = 20 a, what is the magnitude of the magnetic field at the point p?
attashe74 [19]

If a = 2.0 cm, b = 5.0 cm, and i = 20 a,  6.0 μt is the magnitude of the magnetic field at the point p, So the correct option is (a).

The magnetic influence on moving electric charges, electric currents, and magnetic materials is described by a magnetic field, which is a vector field. A force perpendicular to the charge's own velocity and the magnetic field acts on it when the charge is travelling through a magnetic field.

B_{1} = μ_{0} i \frac{\pi }{6} / 4\pi (a+b)

B_{2} = μ_{0} i \frac{\pi }{6} / 4\pi b

As, B_{1} is moving down and B_{2} is moving up so,

B_{2} - B_{1} = (μ_{0} i \frac{\pi }{6} / 4\pi b) -  [μ_{0} i \frac{\pi }{6} / 4\pi (a+b)]

B_{2} - B_{1} = μ_{0} i 24 / (\frac{1}{b} - \frac{1}{a+b} )

B_{2} - B_{1} = \frac{4\pi *10^{-7}*20 }{24} (\frac{1}{0.05} -\frac{1}{0.02})

B_{2} - B_{1} = 5.98×10^{-6} T ≈ 6μT

Therefore,  6.0 μt is the magnitude of the magnetic field .

Learn more about  magnetic field here;

brainly.com/question/23096032

#SPJ4

3 0
2 years ago
A projectile is fired straight upward with an initial veloc- ity of 100 m=s from the top of a building 20 m high and falls to th
SVETLANKA909090 [29]

Answer:

The answer to your question is:

a) h max = 529.7 m

b) t = 20.4 s

c) t = 20.6 s

Explanation:

a) h max = -(vo)² / 2g

              = 100² / 2(9.81)

              = 10000 / 19.62

              = 509.7 m

total height = 509.7 + 20 = 529.7 m

b)  

    h = gt² / 2

    t = √ 2h / g

    t = √ 2(509.7)/9.81

    t = √ 103.91

    t = 10.19 s  

    total time = 2 x t = 2 x 10.19 = 20.4 s

c)

   h = vot + 1/2gt²

   20 = 100t + 1/2(9.91) t²

  4.9t² + 100 t -20 = 0   quadratic equation

t = 0.19 s

Total time = 0.19 + 20.4 = 20.6 s

5 0
3 years ago
Larry , Moe, and Curly are pushing on a 25 kg crate. The crate is sitting on a horizontal floor, and the coefficient of kinetic
monitta

Answer:

2 m/s².

Explanation:

The forces acting on the crate have been shown in the figure below.

Net force acting on the crate in the horizontal direction = 400 - 250 = 150 N towards right.

For the forces of vertical direction we can write,

Normal force = 150 + Mg = 150 + 250 = 400 N (here g = 10 m/s² have been taken)

The magnitude of frictional force that will act on the crate = μ × Normal force

So, Frictional force = 0.25 × 400 = 100 N

Thus, the net force that will cause acceleration in the crate will be

Force in the right direction - frictional force

= 150 - 100 = 50 N

As we know,

Acceleration = \frac{Force}{Mass} =  \frac{50}{25} = 2 m/s²

So, the net acceleration in the crate will be 2 m/s².

7 0
4 years ago
A student wanted to investigate whether or not the temperature of the water would affect the solubility of sugar. She had three
erastova [34]

ind variable ... temp

dep variable .... amount of sugar dissolved

5 0
3 years ago
What happens to the water molecules in a cup of water as it is warmed?
nika2105 [10]

Answer:

A

Explanation:

The distance between the water molecules increases. As temperature increases the water molecules gain energy and move more rapidly and this results in the molecules getting further apart

8 0
2 years ago
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