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3 years ago

Will ice melt faster in salt, sugar or water?

Physics

1 answer:

viva [34]3 years ago

3 0

Answer:

Water because the salt will just make it colder and the sugar won't do anything

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What is the kinetic theory of matter? How does it relate to the motion of molecules?

navik [9.2K]

The Kinetic Molecular Theory explains the forces between molecules and the energy that they possess.

3 0

3 years ago

An electric Kettle is rated at 25 W. Calculate the quantity of heat generated in 2s

MatroZZZ [7]

Answer:

Energy consumed by the electric kettle in 9.5 min =Pt=(2.5×10

)×(9.5×60)=14.25×10

Energy usefully consumed =msΔT=3×(4.2×10

)×(100−15)=10.71×10

where s=4.2J/g

C= specific heat of water and boiling point temp=100

Heat lost =14.25×10

−10.71×10

=3.54×10

4 0

2 years ago

Which of the following is/are true? Electromagnetic waves are created by accelerating charges. Electromagnetic waves are transve

Vikki [24]

Answer:

All of the above are true.

Explanation:

(a). true

whenever charge particle move back and froth from its mean position then it will produce oscillating electric and magnetic fields, . so an em wave can be obtain by accelerating charge

(b). true

the electric field and the magnetic field have vibrations in the perpendicular direction along the motion of the wave so electromagnetic wave is a transverse wave. therefore, the EM wave is a Transverse wave

(c) true .

The Electromagnetic wave consists of the two mutually perpendicular electric and magnetic fields and also both fields are perpendicular to the direction of propagation of the wave.

(d) true .

An electromagnetic wave carry energy through vacuum with a speed of $3 \times 10^8 m/s$

so , all of the above are true.

4 0

2 years ago

How long does it take the students’ kettle to come to the boil if 3 kg of ice at 0 °C is put in it? The latent heat of fusion of

Alborosie

Answer:

Explanation:

111.333

3 0

2 years ago

An object floats in a beaker as shown. when it was put into the beaker, it displaced an amount of water into the graduated cylin

Tanzania [10]

Answer:

answer is C. 10 g

Explanation:

: When an object floats, it displaces an amount of water that has the same mass as itself. Therefore, the mass of the water in the graduated cylinder is equal to the mass of the object. We can see that there are 10 mL of water in the graduated cylinder. We also know that the density of water is 1 g/mL. Since each mL of water has a mass of 1 g, then 10 mL of water has a mass of 10 g. If the mass of the displaced water is 10 g, then the mass of the floating object is also 10 g.

6 0

2 years ago