M
An 80% furnace's discharge air temperature is 125 degrees F and is adding heat to a space at the rate of 80,000 BTU's an hour. What is the input rating of the furnace?
a. 60,000 Btu's
b. 120,000 Btu's
c. 75,000 Btu's
d. 100,000 Btu’s

Answer;

1. Accuracy is the closeness with which an instrument approaches the true value of the quantity being measured

2. Precision is a measure of the reproducibility of the measurement

3. Accuracy may be specified in terms of limits of errors.

(0.43 ± 0.08)m/s is the speed of the ball.

Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is traveling along a path. Speed can be thought of as the rate at which an object travels a distance, and it is a scalar quantity that denotes "how rapidly an object is traveling."

A fast-moving object travels at a high speed and completes a significant distance in a brief period of time. This is in contrast to an object traveling slowly, which travels a relatively short distance in the same length of time. Zero speed refers to an object that is not moving at all.

To learn more about speed please visit-
https://brainly.com/question/28224010?referrer
#SPJ9

Answer: D. prefrontal cortex

Explanation: The Prefrontal Cortex (PFC) and hippocampus are the most critical parts of the human brain for decision making

Answer:

Explanation:

I got the same thing. So, i don't know but good luck

The mass is moving with an acceleration of 13.299 m/s².

The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations.

According to therefore mentioned statement,

the direction of the net force applied on an object determines its acceleration;

according to mentioned data;

F₁=30N

F₂=10N

Net force on object;

F=F₁+F₂

F=F₁y+F₂Cos30°(-x)+F₂ Sinx(-y)

F=3y+10×(√3/2)(-x)+10×(1/2)(-y)

F=ma

ma=-5√3/2(x)+25y

2a=-5√3x/2+25y

a=-5√3x+25y

magnitude(a)=√(-5√3/2)²+(25/2)²

     (a) =13.299m/s²

to know more about acceleration visit;

https://brainly.com/question/15295474

#SPJ9

Answer:

Yes

Explanation:

acceleration is a change in velocity, so an object might be momentarily at rest but a split-second later have some speed, i.e. it can be changing its velocity even if it is momentarily at rest.

Fan B has an efficiency of 55% and usefully transfers 10J of energy to its kinetic energy store each second. 18.18 J of energy is supplied to fan B per second.

Efficiency is the capacity to do a task with little or no wastage, effort, or energy. Being effective is maximizing the use of the resources at your disposal to achieve your objectives. Simply put, something is efficient if there is no waste and every process is optimized.

To calculate the input energy use the following formula

Efficiency = Energy(out) / Energy(in) * 100%

Efficiency = 55%

Energy(out) = 10J

Energy(in) = ?

On putting the given values we get,

55 = Energy(in) / 10 * 100%

On solving we get,

Energy(in) = 18.18J

To know more about Efficiency visit:

https://brainly.com/question/13828557

#SPJ9

Answer:

No

Explanation:

The chemical identity of the substance is the same. The substance is merely in a different state.

Answer:

c because first is totally wrong and second one is about two football fields and d is also totally wrong because it is a partnership of at least 10 countrie so.i think č is correct answer.

The distance traveled by by the dolphin is determined as 11.1 m.

The distance traveled by an object is the product of speed and time of motion of the object. It measures the total path covered by the object.

The distance traveled by by the dolphin is calculated as follows;

Distance = speed x time of motion

Distance = 1.85 m/s x 6 s

Distance = 11.1 m

Thus, the distance traveled by by the dolphin is determined as 11.1 m.

Learn more about distance traveled by an object here: https://brainly.com/question/28032639

#SPJ1

Answer:

d. Mountain Dew is made of many substances that can be separated out.

We know that any mixture can be separated out into its individual components.

During the first two minutes of flight, the SRB and main engine accelerate at a rate of 52.16 m/s2.

Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. The provided parameters are the engine's initial velocity (u), its end velocity (v), and the time of motion (t), which is equal to two minutes (2 x 60 s).

Following are the calculations for the main engine and SRB's acceleration.

a= Δv / Δt

a=7600-1341 /2*60s

a=52.16 m/s²

Consequently, 52.16 m/s2 is the acceleration of the main engine and SRB during the first two minutes of flight.

Learn more about acceleration here-

https://brainly.com/question/12550364

#SPJ9

Determine the magnitude of B-A is 53.68

1.4

Magnitude is a term used to describe size or distance. We can relate the magnitude of the movement to the size and movement speed of the object. The magnitude of a thing or an amount is its size. A car moves at a faster pace than a motorcycle, just in terms of speed.

Magnitude is the relative size of an object (mathematics). The mathematical term for a vector's length or size is the norm. By using the symbol |v|, the magnitude of a vector formula can be utilized to determine the length of a given vector (let's say v). This amount is essentially the distance between the vector's beginning point and ending point.

To  learn more about magnitude from the given link:

brainly.com/question/14452091

#SPJ9

After the given information and solving it the cumulative distance the bird travel is 6 km.

The given parameters of the motion are;

The velocity of the runner,

vr  = 2.2 km/hr

The distance from the finish line and the bird begins to fly from the runner to the finish line,

L = 4 km

The direction and speed of the runner = 6.6 km/hr in a straight line to the finish line and back to the runner

The speed of the bird = 4 × The speed of the runner

Given,

The length of the bird = 0

The bird turns without loss of speed

The time it takes the bird to reach the finish line,

t₁ = 4 km / (6.6 km/hr) = 0.606 hr

The distance the runner runs in time t₁,

d = 2.2 km/hr × 0.606 hr

d = 1.3332 km

The distance runner and  bird combined travel before they meet,

X, is given as follows;

X = L - d

X = 4 km - 1.3332 km

X = 2.667 km

We get; X = (vr + vb) x t

Which gives;

2.667 = ( 2.2 + 6.6) × t

t = 2.667/( 2.2 + 6.6 )

t =  2.667/(8.8)

t = 0.303

The time it take for the bird and the runner to meet,

t = 0.303 hour

The distance the bird travels before reaching the runner,

d₂ = vb x t

So,

d₂ = 6.6 km/hr × 0.303 hr = 2 km

The cumulative distance the bird travels dt = L + d2

dt = 4 km + 2km

dt = 6 km

The cumulative distance the bird travels by the time it reaches the runner dt = 6 km

Alternatively, we have;

db = d₁ + d₃

dr = d₂

d₁ + d₃ + d₂ = 2·L

So, dr + db = 2·L

dr = The distance runner runs before meeting with the bird

db = The distance bird travels before meeting with the runner

db = 4dr

So,

dr +  db = 3 × 4 = 12

dr + 4· dr = 4 · dr = 12

dr = 12 /4 = 3

db =3 × dr

db = 3 × 2

db = 6 km

The distance bird travels before meeting with the runner,

db = 6 km

To know more about velocity :

https://brainly.com/question/18084516

#SPJ9

When an object is thrown with an angle with horizontal, it makes projectile motion

It is given that angle of projectile was 25 degree

The formulas of projectile motion is as follows:

component of velocity at time t = Vxcos[tex]\alpha[/tex]

time of maximum  height= vsin[tex]\alpha[/tex] /g

maximum height = (v sin[tex]\alpha[/tex] )^2/2g

horizontal range = v^2 sin2[tex]\alpha[/tex]/g

v is given to be 20 m/s

time of flight is given by v 2sin[tex]\alpha[/tex]/g

therefore, time of flight = 20 x 2x0.4226 /10 = 1.690 seconds

maximum horizontal range = 20 x 20 x 0.766/10 =30.641 meters

Disclaimer: The value of acceleration due to gravity is assumed to be 10 m/s^2 also the speed of velocity has no unit and hence m/s has been considered

#SPJ9

The y component of the vector is 37.7 N and the angle between the vectors is 26.2⁰.

The y component of the vector will be determined from the resultant vector and the x component of the vector.

R² = Y² + X²

Y² = R² - X²

Where;

Y² = 85.2² - 76.4²

Y² = 1,422.08

Y = √1,422.08

Y = 37.7 N

θ = arc tan (Y/X)

θ = arc tan (37.7/76.4)

θ = 26.2⁰

Thus, the y component of the vector is 37.7 N and the angle between the vectors is 26.2⁰.

Learn more about y component of vectors here: https://brainly.com/question/13416288
#SPJ1

The free body diagram of this situation involves a rightward force of 125 N  and frictional force of 50 N.

A free-body diagram is a sketch of an object of interest with all the surrounding objects stripped away and all of the forces acting on the body shown.

F - ff = F(net)

where;

125 - ff = 75

ff = 125 - 75

ff = 50 N

125 N → Ф  ← 50 N

Thus, the free body diagram of this situation involves a rightward force of 125 N  and frictional force of 50 N.

Learn more about free body diagram here: https://brainly.com/question/21691401

#SPJ1

rtdgsehrtejffej0.345

It is traveling at the end of 55.2 s in the speed of 2975,28m/s

acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. In this instance, you requested the speed and provided the time, acceleration, and speed. Speed is calculated as follows: speed = distance * time. Knowing the units for distance and time is necessary to calculate the units for speed. Since acceleration is equal to time, multiplying the two numbers equals speed. The formula would be:

Acceleration x Time Equals Velocity

Velocity: 53.9 m/s2 x 55.2

           = 2975,28 m/s

Learn more about speed here-

https://brainly.com/question/28224010

#SPJ9

Answer: Graphite and iodine are non-metals that have lustre.

Explanation:

Graphite is a non-metal which has metallic luster. Metallic lustre is due to presence of free electrons in them, generally non metals don't exhibit this property, but iodine and graphite are non metals they exhibit metallic lustre.

A. The electric field is null at the point C; located in the middle of the

segment AB.

Electric field is the region of space where the influence of electric force is felt.

E = kq/r²

where;

E(+6μC) = (9 x 10⁹ x 6 x 10⁻⁶) / (0.5²)

E(+6μC) = +216,000

E(-6μC) = (9 x 10⁹ x 6 x 10⁻⁶) / (0.5²)

E(-6μC) = -216,000

E(net) = E(+6μC) + E(-6μC)

E(net) = 216,000 - 216,000 = 0

Thus, the electric field is null at the point C; located in the middle of the

segment AB.

Learn more about electric field here: https://brainly.com/question/26199225

#SPJ1

The velocity of the car moving in the circular path is determined as 1.67 m/s.

Linear velocity is the measure of the rate of change of displacement with respect to time when the object moves along a straight path.

v = d/t

where;

v = (6 x 1000 m) / (1 x 3600 s)

v = 1.67 m/s

Thus, the velocity of the car moving in the circular path is determined as 1.67 m/s.

Learn more about velocity here: https://brainly.com/question/25749514

#SPJ1

The entire motion of an object, regardless of direction.

In physics, motion is that the phenomenon in which an object changes its position with respect to time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and frame of regard to an observer and measuring the change in position of the body relative to that frame with change in time. The branch of physics describing the motion of objects without regard to their cause is called kinematics, while the branch studying forces and their effect on motion are named dynamics.

If an object isn't changing relative to a given frame of reference,  the thing is said to be at rest, motionless, immobile, stationary, or to possess a constant or time-invariant position with reference to its surroundings. Modern physics holds that, as  there's no absolute frame of reference, Newton's concept of absolute motion can't be  determined

To  learn more about motion from the given link:

brainly.com/question/22810476

#SPJ9

The train is not an inertial frame of reference, and the train may be moving at a constant speed in a straight line or the train may be instantaneously at rest.

The pace at which an object's position changes about relation to a frame of reference and time is known as its velocity.

Uniform velocity is the state in which a body travels the same distance in the same amount of time. When the amplitude and direction of a body's average velocity (v) over time (t) do not change over time, the body is said to be moving at a uniform velocity. An illustration of uniform motion is the moon's orbit around the earth.

As the rate of change of velocity, acceleration is an illustration of a vector quantity.

When an item is moving in a straight path with an increase in velocity occurring at regular intervals of time, it is said to be experiencing uniform acceleration. The uniform acceleration of an object during free fall is one example.

To get more information about speed and Acceleration :

https://brainly.com/question/9282582

#SPJ1

Explanation:

f=ma

a=f/m

a=80/20 = 4m/s

The experiment was well designed.

An experiment is used to determine cause and effect relationships. We know that in this case, the research is aimed at being able to obtain the relationship that exists between the amount of nitrogen in the soil and the production of tomatoes per plant.

As we could see, the experiment includes a control that serves as a baseline for determining the validity of the results. Further more, the  sunlight, water and soil were held constant. The experiment was even repeated further south to verify the results.

Based on a careful review of the experiment, the experiment was well designed.

Learn more about experiment:https://brainly.com/question/11256472

#SPJ1

[tex]s=36.52m[/tex]

Given ,

Time =2.71 second

We apply the formula

[tex]s=ut+12at^2[/tex]

[tex]u=0,t=2.73 \\a=g \\So, the \\height \\ s=36.52m[/tex]

When a body is lying on a horizontal surface, the object is subjected to a downward force due to the action of gravity. These gravitational forces always aim to attract the item, confirming the force's nature as an attractive force. Consider an object of mass "M" resting on a horizontal surface; the force exerted to the object by gravity is equal to the weight of the object "W." The acceleration owing to gravity, indicated as "g," is the acceleration by which an object is drawn towards the ground. As a result, Newton's second law states that when the values in the above connection are substituted.

To learn more about Motion due to gravity from the given link:

https://brainly.com/question/14047086

#SPJ9

The weight of sulphuric acid in the acid is 488.3 grams.

Specific gravity is a comparing tool used to compare weight of a specific liquid when compared to same unit of water as standard substance.

Specific gravity can be defined as the ratio of the density of a substance to that of a standard substance. Water being the standard substance here.

Let us consider the weights for 1 Liter of acid

Weight of 1 liter of water is 1000gram

Therefore weight of 1 liter of acid=1.285 x 1000 =1285 gram

It is given that the acid is 38 percent by weight of sulphuric acid

Therefore, weight of sulphuric acid= 38% of 1285 gram

weight of sulphuric acid = 38/100 x 1285

                                         =488.3 gram

Therefore, weight of sulphuric acid in the acid is 488.3 gram

Hence, the weight of sulphuric acid in the acid is 488.3 grams

Disclaimer:

Quantity of acid has not been mentioned and hence 1 liter has been taken as the quantity.

For further reference:

https://brainly.com/question/28337994?referrer=searchResults

#SPJ9

Answer: (3.32times{10^{5}} Nm^ {-1})

Explanation:

The ship's velocity after a half minute (in m/s) is 170 m/s

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

The final velocity can be obtained as illustrated below:

5 = (v – 20) / 30

Cross multiply

v – 20 = 5 × 30

v – 20 = 150

Collect like terms

v = 150 + 20

v = 170 m/s

Learn more about acceleration:

https://brainly.com/question/491732

#SPJ1