Which of the following is a mixture? a air biron Chydrogen d nickel

Which circuit offers the greater resistance to the battery, two bulbs in series or two bulbs in parallel?

dolphi86 [110]

The resistance of two things in series is the SUM of their individual resistances. So the resistance of two bulbs in series is double the resistance of one bulb.

(If they're in parallel, their combined resistance is 1/2 the resistance of one bulb.)

So two bulbs in series is the greater resistance. (a)

7 0

3 years ago

A glass of water sits on a scale. The scale reads 4.78 N. A steel bolt weighs 2.07 N. The density of steel is 7.86 g/cm3. We tie

miv72 [106K]

Answer:

The weight of water weight is 5.043 N.

Explanation:

Given that,

Force = 4.78 N

Weight of steel bolt = 2.07 N

Density of steel = 7.86 g/cm³

Suppose determine how much does the glass of water weight.

We need to calculate the volume of bolt

Using formula of density

$\rho_{b}=\dfrac{m}{V}$

$V=\dfrac{m}{\rho_{b}}$

Put the value into the formula

$V=\dfrac{2.07}{9.8\times7860}$

$V=2.6873\times10^{-5}\ m^3$

We need to calculate the force on bolt

Using buoyant force

$F=\rho gV$

Put the value into the formula

$F=1000\times9.8\times2.6873\times10^{-5}$

$F=0.263\ N$

We need to calculate the new weight of glass of water

Using formula for weight of glass of water

$W'_{w}=W_{w}+F_{b}$

Put the value into the formula

$W=4.78+0.263$

$W=5.043\ N$

Hence, The weight of water weight is 5.043 N.

4 0

3 years ago

A simple model of the hydrogen atom suggests that the electron orbits the proton. What is the

andrey2020 [161]

If I remember correctly, the correct answer is either:
A. Electrostatic
or
B. Gravitational

7 0

3 years ago

Two loudspeakers 42.0 m apart and facing each other emit identical 115 Hz sinusoidal sound waves in a room where the sound speed

Tems11 [23]

Answer:

She passes through a loud spot at x = 19.5m from the first speaker. Constructive interference occurs here.

At the quiet spot destructive interference occurs. The minimum distance for this to occur is 20.25 from the first speaker.

Explanation:

3 0

3 years ago

True or false? If an element can form covalent bonds then it will never be involved in ionic bonding.

vladimir2022 [97]

Answer:

true

Explanation:

because the bonds in that element can only be shared but not transferred , but sometimes it depends on the element

7 0

3 years ago

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