Physics, 17.01.2020 05:31 queenkimm26

Aglass 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 the bolt to a string and lower the bolt into the glass of water so that the bolt is fully submerged in the water but is not touching the bottom or side of the glass.

Answers: 3

Show answers

Answers

Answer from: hardwick744

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.

Answer from: Quest

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

Answer from: Quest

this is a good question! i'll do some research and come back when i have the answer!

Strehe name denean expression ordurina liquid of surface to play tobe ofradius 10m stands upright in

Other questions on the subject: Physics

Physics, 22.06.2019 05:00, DASASDAEDWEDA

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

Answers: 2

continue

Physics, 22.06.2019 08:20, Gtx014

The two required components for a generator

Answers: 2

continue

Physics, 22.06.2019 13:30, livingfamyboys35

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Answers: 2

continue

Physics, 22.06.2019 14:30, abbz13

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

Answers: 2

continue

You know the right answer?

Aglass of water sits on a scale. the scale reads 4.78 n. a steel bolt weighs 2.07 n. the density of...