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Len [333]
4 years ago
11

Pls I need help i will give brainliest answer

Physics
1 answer:
katen-ka-za [31]4 years ago
6 0
Mg + 2HCl —> MgCl2 + H2
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How did dalton improve the atomic theory more than 2000 years after democritus's hypothesis about atoms?
suter [353]
<span>Dalton improved the atomic theory by establishing that elements are made of atoms & that all atoms of an element are identical.</span>
6 0
3 years ago
The copper windings of a motor have a resistance of 50 Ω at 20° C when the motor is idle. After the motor has run for several ho
Drupady [299]

Answer:

The temperature of the windings are 60.61 °C

Explanation:

Step 1: Data given

Resistance = 50 Ω

Temperature = 20.0 °C

After the motor has run for several hours the resistance rises to 58Ω.

Step 2: Calculate the new temperature

Formula: R = Rref(1 + α(T-Tref))

⇒with α = temperature coëfficiënt of Cupper at 20 °C = 0.00394/°C

⇒with Tref = reference temperature = 20°C

⇒with T = end temperature = TO BE DETERMINED

⇒with R = resistance at end temperature = 58Ω

⇒with Rref = resistance at reference temperature =  50 Ω

==> T = (R/Rref - 1)/α + Tref  

T = (58/50) - 1 )/ 0.00394 + 20

   T = 60.61 °C

The temperature of the windings are 60.61 °C

5 0
4 years ago
A particular spherical-shaped fruit has a spherical seed, and the rest of the fruit is edible. The radius of the fruit is 3 time
notsponge [240]

Answer:

<u>2600 cubic centimeters</u>

Explanation:

Volume of the edible fruit is equal to :

⇒ Volume (fruit) - Volume (seed)

⇒ 4/3π(3r)³ - 4/3πr³

⇒ 27 x 4/3πr³ - 4/3πr³

⇒ 100 (27 - 1)

<u>⇒ 2600 cubic centimeters</u>

8 0
2 years ago
Go around your house and hit (or tap) ten different objects. The objects should be different shapes and made of different materi
Blababa [14]

Answer:

 

Explanation:

go around your house and tap random objects. For example, a sink. What noise did it make? was it loud or quiet? was it soft or hard? I hope this helps

4 0
3 years ago
Read 2 more answers
As a dilligent physics student, you carry out physics experiments at every opportunity. At this opportunity, you carry a 1.11-m-
soldier1979 [14.2K]

Answer:

The strength of the magnetic field is 0.0842 mT

Explanation:

Given:

Velocity of rod v = 3.07 \frac{m}{s}

Length of rod l = 1.11 m

Induced emf across the rod \epsilon = 0.287 \times 10^{-3} V

According to the faraday's law

We have a special case for moving rod in magnetic field.

Induced emf in moving rod is given by,

   \epsilon = Blv

Where B = strength of magnetic field

  B = \frac{\epsilon}{lv}

  B = \frac{0.287 \times 10^{-3} }{3.07 \times 1.11}

  B = 0.0842 \times 10^{-3} T

  B = 0.0842 mT

Therefore, the strength of the magnetic field is 0.0842 mT

7 0
3 years ago
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