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Marta_Voda [28]
4 years ago
15

PLS ANSWER!!! TEN POINTS PLUS BRAINLIEST

Physics
2 answers:
disa [49]4 years ago
6 0

Answer:

True

Explanation:

Low melting points and lack of electrical conductivity ARE properties of molecular compounds.

Let me know if this helps!

Maru [420]4 years ago
3 0

Answer:

true

Explanation:

molecular compounds are covalent compounds

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Answer: Earth’s internal heat

Explanation:

The energy source for plate tectonics is Earth's internal heat while the forces moving the plates are the ridge push and slab pull gravity forces.

7 0
4 years ago
If a 3-kg object has a momentum of 33 kg·m/s, what's its velocity?
kramer
Its velocity is 11 m/s. 
5 0
4 years ago
A velocity selector is built with a magnetic field of magnitude 5.2 T and an electric field of strength 4.6 × 10 ^ 4 N/C. The di
nydimaria [60]

Explanation :

Magnetic field, B = 5.2 T

Electric field, E=4.6\times 10^4\ N/C

The directions of the two fields are perpendicular to each other. Hence the force due to each field will equate each other.

Electrostatic force, F =qE.........(1)

Magnetic force, F = qvB........(2)

From equation (1) and (2)

   E = v B

v=\dfrac{E}{B}

v=\dfrac{4.6\times 10^4\ N/C}{5.2\ T}

v=0.88\times 10^4\ m/s

v=8.8\times 10^3\ m/s

Hence, the correct option is (a).

(2) A permanent magnet always has two poles as the North pole and south pole. The magnetic field lines start from north poles and terminate at the south pole of the magnet.

Hence, the correct option is (C).

5 0
3 years ago
The different molecules that make up the air in a room have, on average the same kinetic energy. How does the speed of the diffe
prisoha [69]

Answer:

speed of molecule ∝  1/mass of molecule.

Explanation:

The velocities of the molecules depend on their masses. That's because if the molecules are large in size, their velocity is slower. Therefore their velocity is quicker when their size is small, since the molecules can move faster.

Therefore , it can be written as

speed of molecule ∝  1/mass of molecule.

8 0
4 years ago
In the refrigeration cycle, the process of liquid changing to the vapor phase _____.
Fiesta28 [93]
Evaporation?  im not positive but im almost certain that's the answer
3 0
4 years ago
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