The time (t) required to empty a tank varies inversely as the rate (r) of pumping. If a
pump can empty a tank in 3 hours at a rate of 400 gallons per minute, how long will it
take to empty a tank at 600 gallons per minute?

Answers

Answer 1

Answer:

T = C / R      t = time, C =constant of proportionality, R = rate

180 min = C / 400 gal/min      

C = 72000 gal      to empty tank

T = 72000 gal / 600 gal/min = 120 min = 2 hrs


Related Questions


When positive charges build up in an object, the net charge of that object becomes...

a. it stays the same
b. negative
c. positive
d. neutral

Answers

Answer:

c. postive

Explanation:

All physical objects are made up of atoms. Inside an atom are protons, electrons and neutrons. The protons are positively charged, the electrons are negatively charged, and the neutrons are neutral.

Therefore, all things are made up of charges. Opposite charges attract each other (negative to positive). Like charges repel each other (positive to positive or negative to negative). Most of the time positive and negative charges are balanced in an object, which makes that object neutral.

Static electricity is the result of an imbalance between negative and positive charges in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. One way to discharge them is through a circuit.

Hope this helps, have a nice day/night! :D

Answer:

C

Explanation:

C because if you build anything up it remains the same.

Một oto đang chuyển động thẳng đều với vận tốc 36km/h thì hãm phanh sau 20s thì ô tô dừng lại quãng đường oto đi được là

Answers

36km/h=10m/s
v=s/t=>s=200m

Almost all living things depend on the process of ____________________ to supply them with the energy they need.

A.
photosynthesis

B. heterotroph

Answers

photosynthesis

a heterotroph is an organism that gets its own food like humans who fame and hunt.
photosynthesis is life form of all plants which is necessary for oxegyn

Alex drops a soccer ball and a table tennis ball from the top of a ladder. He wants to compare the velocities of the balls just before they hit the ground.
Which formula should Alex use to calculate the velocity of each ball,
assuming they are in free fall?

A) v=Gt
B) g=vt
C) t=vg
D) v=G/t

Answers

Answer:

d is the correct answer

Explanation:i did this math

Jake walked 10 meters in 5
seconds. What was his speed?
A. 2 m/s
B. 0.5 m/s
C. 50 m/s
D. 15 m/s

Answers

To calculate speed, you need to divide distance over time. Which is 10meters/5seconds. Which is 2m/s

Answer:

[tex]\boxed {\boxed {\sf A. \ 2 \ m/s}}[/tex]

Explanation:

Speed is the distance traveled per unit of time, or how fast an object is moving.

It is calculated by dividing the distance by the time.

[tex]s= \frac{d}{t}[/tex]

Jake traveled 10 meters in 5 seconds.

d= 10 m t= 5 s

Substitute the values into the formula.

[tex]s= \frac{10 \ m}{5 \ s}[/tex]

Divide.

[tex]s= 2 \ m/s[/tex]

Jake's speed was 2 meters per second and choice A is correct.

Alejandro Kirk is the catcher for the Blue Jays’ baseball team. He exerts a forward force on the 0.145-kg baseball to bring it to rest from a speed of 38.2 m/s. During the process, his hand recoils a distance of 0.135 m.
Determine is the acceleration of the ball.
Determine the force applied by Alejandro.

Answers

Answer:

a= -5404.6 [m/s²]; F=785.75 [N].

Explanation:

1. Determine is the acceleration of the ball:

equation of the distance (0.135m) is:

[tex]S=-\frac{at^2}{2} +v_0t,[/tex]  where S=0.135[m]; a - required acceleration; t - elapsed time; v₀ - initial velocity (38.2 m/s);

also the required acceleration is:

[tex]a=\frac{v-v_0}{t}, where[/tex] V - the end velocity (0 m/s), t - elapsed time, ₀ - initial velocity (38.2 m/s).

Using the equations of reqruired acceleration and the distance it is possible to make up and solve the next system:

[tex]\left \{ {{a=-\frac{38.2}{t} } \atop {S=-\frac{at^2}{2}+38.2t }} \right. \ => \ \left \{ {{a=-\frac{38.2}{t} } \atop {0.5at^2-38.2t=0.135}} \right. \ => \ \left \{ {{a=-\frac{38.2}{t} } \atop {19.1t-38.2t=0.135}} \right. \ => \ \left \{ {{a=-5404.6} \atop {t=0.007}} \right.[/tex]

finally, a≈-5404.6 [m/s²].

2. Determine the force applied by Alejandro.

the energy is:

[tex]E=\frac{mv^2}{2}; \ or E=FS, where \ m-the \ mass; \ v-velocity; \ F-required \ force; S-distance;[/tex]

According to these two equations, the required force is:

[tex]F=\frac{E}{S}=\frac{mv^2}{2S};[/tex]

F=0.145*38.8²/2/0.135≈785.75 [N].

note, the suggested way is not the shortest one and not the only one.

P.S. if it is possible, check the arithmetic operations and the provided answers in other sources.

Question 2 (1 point)
Potential energy depends on...

Speed and velocity

Position or shape

Length and color

Density and volume​

Answers

Answer:

potential energy depends on position or shape

Different between sound wave and water wave

Answers

Water waves shake energy over the surface of the sea, while sound waves thump energy through the body of the air. Sound waves are compression waves. They're also called longitudinal waves because the air vibrates along the same direction as the wave travels.

Which of the following are equivalent to 1 Newton?

Answers

Answer:

1 kilogram meter per second squared?

help me out plssssssssssss

Answers

Answer:

1.b

2.c

have a good day bro

Cuáles son las diferencias, con respecto al proceso de extracción y tratamiento, entre

el gas propano y el gas metano.

Answers

Answer:

la burguesía era de clase alta y en su mayoría rica. La gente de clase trabajadora generalmente trabajaba con un salario mínimo y solo tenía suficiente dinero para poner comida en la mesa. En este momento, la gente veía a los trabajadores de clase media como menos que otras personas.

Explanation:

what is the main difference between a substance going through a physical change and one going through a chemical ?

Answers

Answer: Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Answer:

just give the other person brainlyest

Explanation:

Explain how potential and kinetic energy are at play when we talk about Newton’s second law of motion?

Answers

Answer:

represents the energy the object possesses by virtue of its motion. ... This type of energy is generally known as kinetic energy. Thus, Equation (16) states that any work done on point object by an external force goes to increase the object's kinetic energy.

Explanation:

     

   The relation between some bodies are involved by Object's position and motion, i.e., through potential and kinetic energy in which it actually explained by Newton's second law of motion.

What is Newton's second law of motion?

Definition:

      Newton's second law states that force is equal to the rate of change of momentum, i.e., the mass and velocity.

It can be written as F = mv where m is mass and v is velocity. Potential energy can be described by a body's position while kinetic energy is possessed by a body's  motion. Both forms of energy are influenced by forces and are equal to the total momentum. Momentum can be described by explaining the mass and velocity of the object.

Learn more about Newton's second law of motion,

https://brainly.com/question/28176686

#SPJ2

the homogenvity of s=ut+1/2at^2

Answers

s = ut+(1/2)at² is dimensionally homogeneous.

Determine the kinetic energy of a 1500 kg roller coaster car that is moving with a speed of 35.0 m/s.

Answers

Answer:

kinetic energy equation is 85,714.2857 kg.

Explanation:

You increase your walking speed from 1 m/s to 3 m/s in a period of 1 s.

What is your acceleration?

5 m/s2
3 m/s2
2 m/s2
4 m/s2

Answers

Answer:

2 m/s2

Explanation:

|acceleration| = (change in speed) divided by (time for the change)

Change in speed = (end speed) minus (start speed)

Initial speed of walking = 1 m/s

Final speed of walking = 3 m/s

Change of speed in walking = (3 - 1) m/s

                                            = 2 m/s

Time in which the change of speed occurred = 1 sec

Then

Acceleration = Change of Speed/ Time taken

                    = 2/1 m/s^2

                    = 2 m/s^2

Therefore the answer is 2 m/s2.

The acceleration is 2 m/s².

What is acceleration?

Acceleration can be defined as the rate of change of velocity.

The acceleration can be calculated using the formula below.

Formula:

a = (v-u)/t................... Equation 1

Where:

a = accelerationv = Final velocityu = Initial velocityt = time.

From the question,

Given:

v = 3 m/su = 1 m/st = 1 seconds

Substitute these values into equation 1

a = (3-1)/1a = 2 m/s².

Hence, The acceleration is 2 m/s².
Learn more about acceleration here: https://brainly.com/question/605631

Determine the work done by the force Fx=(6x-4)N as the object moves from x1=0 to x2=3 m.

Answers

Answer:

15J

Explanation:

Let's assume force and motion have the same direction, so the dot product between the two reduces to the product of magnitudes.

If you studied calculus:  [tex]w= \int \limits^3_0 6x-4dx[/tex], by definition. Some "easy" math, that's [tex](3x^2-4x)\limits^3_0=27-12 - 0 = 15 J[/tex]

Else. we have to take the long way.  if the force was constant, and you plotted magnitude of the force vs position in a graph, you would get an horizontal line, and your work would be the area between the line and the x axis. And there is no reason why it shouldn't be the same for a variable force - if you think about it, it's the same way they justify the position formula for an accelerated motion. Let's graph it and start debating - sorry for my paint skills. We can easily say that in the green triangle the force is opposing the motion, so its work is negative, while in the blue area force and displacement go in the same direction, thus work is positive. Now it's just to calculate the area of two triangles

For the green one, it's a right triangle with side lengths 4 and 2/3, whose area is [tex]\frac12(4)(\frac23) = \frac43[/tex].

For the blue triangle, it's again a right triangle with side lengths 14 and 3-2/3= 7/3, whose area is [tex]\frac12(14)(\frac73) = \frac{49}3[/tex]

Our total work is the difference between the two, or [tex]w= \frac{49}3-\frac43 = \frac{45}3 = 15[/tex]

Density of water is-

Answers

Answer:

The density of water is around 997 kg/m³ of 1 gran per millilimeter

PLEASE PLEASE PLEASE HELP ME!!!

Answers

Answer: Levers

Explanation: Levers lifte

the machines arm

Any vector can be expressed as the sum of two components, usually
referred to as what?

Answers

Two vectors can be added together to determine the result (or resultant). ... computing the vector sum of all the individual forces acting upon that object.

i hope u understand

The kinetic energy of an object can sometimes be greater than a potential energy a originally possessed, true or false?

Answers

Answer:

true

Explanation:

Energy stored in the nuclei of atoms can be used to generate electricity. ... Most of the energy of food is converted to heat.

I think it’s true because potential energy can be converted into kinetic energy so, the energy stored in the nuclei of atoms can be used to generate electricity. Ofc the kinetic energy will be greater than the potential energy !

The energy transferred per unit electric charge in a circuit is .
A current
B charge
C power
D potential difference​​

Answers

i believe it’s power, but i could be wrong!

Entomology is the application of__________ to be used in a criminal investigation??
A/ soil science
B/insect science
C/plant science
D/glass science

Answers

B insect science. Like several of the other fields that are categorized within zoology, entomology is a taxon-based category; any form of scientific study in which there is a focus on insect-related inquiries is, by definition, entomology.

A piece of wood has a mass of 8g and a volume of 10cm³. Work out the density of the wood in /3 .
no links please just explain how you got the answer.​

Answers

Answer:

8×10^-3÷10×10^-6=8×10^2=800 kg/m^3

Answer:

2.4/3

Explanation:

first we make 8g/10cm then 0.8 so the only number that can fit for /3 is 2.4

hope helped!


Which statement about a HORIZONTAL projectile is false?

The horizontal velocity is constant.

The horizontal acceleration is constant.

The vertical velocity is constant.

The vertical acceleration is constant.

Answers

Answer:

the vertical velocity is constant.

Explanation:

The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical acceleration caused by gravity; thus, the vertical velocity of a projectile changes. and the horizontal motion of a projectile is independent of its vertical motion.

when two waves in the same medium hit each other, the resulting displacement of the medium is

Answers

Explanation:

The resulting displacement of the medium during complete overlap is -1 unit. This is still destructive interference since the two interfering pulses have opposite displacements.

what is the purpose of delivering medical aid through drones

Answers

Drones can help overcome transport challenges and delays in the delivery of small, low weight supplies, through the re-supply of essential medicines and delivery of medical diagnostic kits and return samples.

Explain how coral reefs alter the weathering and erosion of shorelines.

Answers

Answer: Coral reef structures also buffer shorelines against 97 percent of the energy from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion. When reefs are damaged or destroyed, the absence of this natural barrier can increase the damage to coastal communities from normal wave action and violent storms.

A ball is falling toward the ground. Which of the following statements are false? (a) The force that the ball exerts on Earth is equal in magnitude to the force that Earth exerts on the ball. (b) The ball undergoes the same acceleration as Earth. (c) The magnitude of the force the Earth exerts on the ball is greater than the mag- nitude of the force the ball exerts on the Earth.

Answers

Hi there!

(A) The force that the ball exerts on Earth is equal in magnitude to the force that Earth exerts on the ball.

Gravitational force is an example of an action-reaction pair:

[tex]F_{1,2} = -F_{2,1}[/tex]

Gravitational force is given by the equation:

[tex]F_g = \frac{Gm_1m_2}{r^2}[/tex]

Plugging in the masses of the Earth and ball, gravitational constant, and radius will result in the SAME GRAVITATIONAL FORCE exerted by both objects on each other.

What is the kinetic energy of a 100kg ship moving along the water at a rate of 10m/s?

Answers

Answer:

5000 J

Explanation:

The kinetic energy of an object can be found by using the formula

[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]

m is the mass in kg

v is the velocity of the object in m/s

From the question

m = 100 kg

v = 10 m/s

We have

[tex]k = \frac{1}{2} \times 100 \times {10}^{2} \\ = 50 \times 100 \\ = 5000 \: \: \: \: \: \: \: \: [/tex]

We have the final answer as

5000 J

Hope this helps you

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