Consider a building that used 12 × 106 Btu for heating over the period of 30 days. What average power does this correspond to?Show your calculations here:

Answers

Answer 1

Answer:
OK. During my exhaustive 5-seconds of online research, I found
one place that says that 1 BTU is about 0.293071 watt-hour. That
should be enough to get me going.

(12 x 10^6 BTU / 30 days) x (day/24 hour) x (0.293071 watt-hour/BTU) =

(12 x 10^6) x (0.293071) / (30 x 24) watts = 4,884.5 watts .
===================================

As a check, I grabbed another conversion off the web, and I'll do
the whole thing again with that one. Let's see if I come anywhere
close to my first answer this time:

This one says that 12,000 BTU = 3.51685 kWh .
So ...

(12 x10^6 BTU) x (3.51685 kW-hr / 12,000BTU) x (day/24 hr) / (30 day) =

(12 x 10^6) x (3.51685) / (12,000 x 24 x 30) kW = 4.8845 kW

Couldn't ask for any nicer agreement !
That's my answer and I'm sticking to it.

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A 9250 kg bridge going east-west is supported by two pillars. The bridge is 47.0 m long with a pillar 5.0m from the west end and 10 meters from the east end. How much force is applied on each of the pillars? Answer: 39,023 N and 52,477 N

Answers

N/B

Kindly find attached the sketch and the free body diagram solution to the problem

Explanation:

This problem bothers on the moments of forces

Moment is the turning effect of a force about a point. It is the product of force times perpendicular distance from the point of action

The density of water is 1.00 g/cm3. The density of ethanol is 0.80 g/cm3. What is the volume of ethanol, in cm3 that has the same mass as 100 cm3 of water?

Answers

Explanation:

Given that,

The density of water is 1 g/cm³

The density of ethanol is 0.8 g/cm³

We need to find the volume of the ethanol that has the same mass as 100 cm³ of water.

Density=mass/volume

For water,

$d=(m)/(V)\n\nm=dV\n\nm=1\ g/cm^3* 100\ cm^3\n\nm=100\ g$

For ethanol,

$d=(m)/(V)\n\nV=(m)/(d)\n\nV=(100\ g)/(0.8\ g/cm^3)\n\nV=125\ cm^3$

Hence, 125 cm³ of ethanol has the same mass as 100 cm³ of water.

Answer:

1.00 g/cm3

Explanation:

Using the terms humidity and dew point, explain why you might find small droplets of water on your lawn in the morning.

Answers

u might found it because the cloud are touching the ground causing to have dew on the ground in the morning.

Answer:

well i just needed the achievement

Explanation:

Compare and contrast average speed and instantaneous speed

Answers

Average vs. Instantaneous Speed

During a typical trip to school, your car will undergo a series of changes in its speed. If you were to inspect the speedometer readings at regular intervals, you would notice that it changes often. The speedometer of a car reveals information about the instantaneous speed of your car. It shows your speed at a particular instant in time.

The instantaneous speed of an object is not to be confused with the average speed. Average speed is a measure of the distance traveled in a given period of time; it is sometimes referred to as the distance pertime ratio. Suppose that during your trip to school, you traveled a distance of 5 miles and the trip lasted 0.2 hours (12 minutes). The average speed of your car could be determined as

On the average, your car was moving with a speed of 25 miles per hour. During your trip, there may have been times that you were stopped and other times that your speedometer was reading 50 miles per hour. Yet, on average, you were moving with a speed of 25 miles per hour.

hope this helps

Two skaters stand facing each other. One skater's mass is 60 kg, and the other'smass is 75 kg. The two skaters push off each other. After the push, the smaller
skater has a velocity of 3.0 m/s. If no other forces are acting on the skaters, what
is the velocity of the larger skater?

Answers

Answer:

v' = 2.4 m/s

Explanation:

Given that,

Mass of one skater, m = 60 kg

Mass of the other's skater, m' = 60 kg

The two skaters push off each other. After the push, the smaller skater has a velocity of 3.0 m/s.

When there is no external force acting on a system, the momentum remains conserved. It means initial momentum is equal to the final momentum. Let v' is the velocity of the larger skater.

mv = m'v'

$v'=(mv)/(m')\n\nv'=(60* 3)/(75)\n\nv'=2.4\ m/s$

So, the velocity of the larger skater is 2.4 m/s.

Final answer:

Considering the law of conservation of momentum, the velocity of the larger skater will be -2.4 m/s. The negative sign indicates the skater is moving in opposite direction.

Explanation:

This problem is solved using the principle of conservation of momentum, in physics. According to the law of conservation of momentum, the total momentum before the push is equal to the total momentum after the push. Initially, when the skaters are not moving, their total momentum is zero. After pushing off, their total momentum remains zero (They move in opposite directions thus one momentum is negative).

Momentum is the product of mass and velocity, symbolized as p=mv.

Let's say the velocity of the larger skater is 'v'. Momentum conservation gives us

60 kg * 3.0 m/s + 75 kg * v = 0

Solving, we find v = - 60 kg * 3.0 m/s / 75 kg = -2.4 m/s.

The negative sign simply indicates that the larger skater is moving in the opposite direction, but the magnitude of the velocity is 2.4 m/s.

Learn more about Conservation of Momentum here:

brainly.com/question/32309314

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If an elephant is chasing you in a straight line, its mass is threatening but if you zigzag, you have an advantage why?

Answers

I believe it is because, due to the elephant's size, it makes it harder to change direction.

Answer:

What the other guy said

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