Would you expect the bonds in ammonia to be polar covalent?

Elanso [62]

10.2 m/s means in 1 sec he travels 10.2 metres. so in 20 sec he travels 20×10.2= 204 meters

4 0

3 years ago

A 120V Microwave uses 8A of current. It runs for 15 hours over the course of a month. If electrical energy costs $0.11/KWh, what

Reika [66]

Answer:

Monthly energy cost = $47.52

Explanation:

Given the following data;

Voltage = 120 Volts

Current = 8 Ampere

Time = 15 hours

Energy cost = $0.11/KWh

To find the energy cost for a month;

First of all, we would determine the power rating of the microwave oven.

Power = current * voltage

Power = 8 * 120

Power = 960 Watts

Next, we find the amount of energy consumed;

Energy = power * time

Energy = 960 * 15

Energy = 14400 Watt-hour

To kilowatt per hour, we have;

Energy = 14400/1000 = 14.4 KWh

Now, we determine the monthly energy cost;

Daily energy cost = Energy consumption * cost

Daily energy cost = 14.4 * 0.11

Daily energy cost = $1.584

Therefore, monthly energy cost = 1.584 * 30

Monthly energy cost = $47.52

Or

Monthly energy cost = 14.4 * 0.11 * 30

Monthly energy cost = $47.52

7 0

3 years ago

What volume of lead must be fastened underneath it to sink the wood in calm water so that its top is just even with the water le

astraxan [27]

The bouyancy force is:

Since the wood-lead system is completely submerged, the bouyancy force

is FB = ĎwgVl + ĎwgVb, where Ďw is the density of water,Vl

is the volume of

the piece of lead and Vb is the volume of the wooden block. The weight of the

  combined lead and wooden block is: W = ĎlgVl + ĎbgVb. Since the system is

in equilibrium, the bouyancy force must be equal to the total weight:

ĎwgVl + ĎwgVb = ĎlgVl + ĎbgVb

now we can solve for the volume of lead:

ĎwgVl â’ ĎlgVl = ĎbgVb â’ ĎwgVb

Vl(Ďw â’ Ďl) = Vb(Ďb â’ Ďw)

Vl =

Ďbâ’Ďw

Ďwâ’Ďl

Vb

Now we substitute the values for the density of lead Ďl = 11.3 Ă— 103kg/m3  ,

the density of the wood and the density of water Ďw = 1000kg/m3

. We get:

Vl =

600â’1000

1000â’11300

(0.6m Ă— 0.25m Ă— 0.08m) = 4.66 Ă— 10â’4m3

4 0

3 years ago

A white blood cell has a diameter of approximately 12 micrometers or 0.012 um a model represents its diameter as 24 um what rati

ohaa [14]

Answer:

The ratio of the model size is 1 : 2000

Explanation:

Given

Real Diameter = 0.012 um

Scale Diameter = 24 um

Required

Determine the scale ratio