What is a Vector and a scalar?

Answers

Answer 1

Answer: Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
Vectors are quantities that are fully described by both a magnitude and a direction.

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When light falls on a soap bubble or on the oily film spread on a water puddle, a spectrum of colors is observed. How is this spectrum of colors formed? 1) separation of white light by a prism 2) absorption of colors in a pigment present 3) constructive and destructive interference of light waves 4) reflection of light by soap bubble or oil film
A tuning fork with a frequency of 512 Hz is used to tune a violin. When played together, beats are heard with a frequency of 4 Hz. The string on the violin is tightened and when played again, the beats have a frequency of 2 Hz. The original frequency of the violin was ______.
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A 1200 w microwave oven transforms 1.8x10(to the power of 5) J of energy while reheating some food. Calculate how long the food was in the microwave, in mins!? (Please show steps, thanks)

Answers

1200 watts = 1200 joules per second

(1.8 x 10⁵ joules) / (1,200 joules/sec) = 150 sec = 2.5 minutes

How high up is a 3.00 kg object that has 300. J of energy

Answers

You are giventhe mass of an object which is 3.00 kilograms. Also, you are given the energyexerted by the object at 300 Joules. You are required to find the height ordistance travelled by your object. You need to know that potential energy isequal to the mass times the gravitational force times the height of the object.Let us denote P as our energy, m as the mass of the object, g as thegravitational force and h as the height. So,

P = mgh
h = P/mg
h = (300 J)/(3kg)(9.8066m/s2)
h = 10.2 m

I need these ASAP Thank you c:1) The outer electrons in an element are referred to as _____.
A) valence electrons
B) ground state electrons
C) excited electrons
D) none of the above

2)In an exothermic reaction, the products have _____.
A) more energy than the reactants
B) less energy than the reactants
C) the same amount of energy as the reactants

3)A static charge is different from an electric current, in that a static charge _____.
A) is a flow of electrons
B) lasts only for a fraction of a second
C) occurs because a force is exerted on the electrons
D) involves the movement of ions as well as electrons

4)The time that it takes for a wave to travel one wavelength is considered a(n) _____.
A) period
B) velocity
C) amplitude
D) rarefaction

(This is for Integrated Physics and Chemisty)

Answers

Answer:

A) valence electrons

Explanation:

outer shell electrons used to participate in formation of bonding because when two atoms comes close to each other then these outer shell electrons interact with each other and hence bond will form between the atoms.

So correct answer will be

A) Valence Electrons

Answer:

More energy than reactants

Explanation:

Here products will have more energy than reactants due to which overall the energy is released and hence we get some energy along with the products in such type of reactions.

Answer:

C) occurs because a force is exerted on the electrons

Explanation:

Static charge will remains at rest because of the the force that makes them in stationary condition.

Answer:

A) Period

Explanation:

One time period is the total time for which a one complete wavelength distance is traveled by the wave.

1. A) Valence electrons
2.B) less energy than the reactants
3.C) occurs because there is a force exerted on the ions
4.A) period

What effect does adding more loops to the wire coil have on the electromagnet?

Answers

The strength of the electromagnet depends on the magnitude of the current in the wire and the number of turns of wire around the core. If you add more turns to the coil and keep the magnitude of the current constant, the electromagnet becomes stronger.

What are the variables of Boyle's law?pressure and number of molecules of gas
volume and temperature
pressure and temperature
volume and number of molecules of gas
pressure and volume

Answers

pressure and number of molecules of gas,volume and number of molecules of gas.

The strength of the electric field 0.5 m from a 6 µC charge is N/C. (Use k = 8.99 × 109 N•

Answers

The formula for Electric Field Strength:

E = Q /(4πε₀r²)

Note:

1 /(4πε₀) = k = 8.99 * 10⁹ Nm²/C²

Q = 6 μC = 6 * 10⁻⁶ C. r = 0.5m

E = kQ / r²

E = (8.99 * 10⁹ * 6 * 10⁻⁶) /(0.5²) Use a calculator

E = 215.6 * 10³ N/C

Electric field strength = 215 600 N/C.

I hope this helps.

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