why are dams have broader walls at the bottom?

Answers

Answer 1
A dam has broader walls at the bottom than at the top to withstand the great pressure of water which increases with increase in depth.

Related Questions

How does space exploration affect the economy of Florida?
A) Since rockets launched from Florida are paid for by the federal government, there is a positive effect on Florida's economy.
B) Since rockets launched from Florida pull tourists away from Disney World and local beaches, there is a negative effect on Florida's economy.
C) Since rockets launched from Florida must be purchased from companies located outside of Florida, there is a negative effect on Florida's economy.
D) Since rockets launched from Florida require hundreds of scientists and engineers to move to the area, there is a positive effect on Florida's economy.

Answers

Answer:

How does space exploration affect the economy of Florida?

A) Since rockets launched from Florida are paid for by the federal government, there is a positive effect on Florida's economy.

A Normal force of 16N is distributed uniformly on top surface of a cube of edge 6cm. The
pressure on this surface is Rx104Pa. Find the value of R​

Answers

Answer:

approx. 0.43

Explanation:

Area of the side of the cube is 36 cm or 0.36 m, P= F/A, so R*104=16/0.36, R*104≅44.44, R≅0.43

Tom used 75 N of force to push a box 3 meters across the floor. How much work did he do?
0.12 J
25 J
1
78J
225 J

Answers

Answer:

It must be 225 J.

Explanation:

According to

Work done = Force × distance travelled

                    =  75      × 3

                    = 225 J

This answer is taken so since no angles are stated in the question.

PLEASE HELP THIS IS BIG. ITS 2ND GRADE WORK BTW. HELP FOR CROWN AND POINTS!!!!

What did Ben Franklin show with his famous kite experiment?
that lightning is electricity
how sounds could be recorded
that electromagnetic waves could be found and turned into sound energy
how to create a battery

Answers

Answer:

your answer is A

Explanation:

brainliest plzzzz

Answer:

c is the correct answer

4. When a key on piano is pressed, a sound is heard. What produces this sound?
A. the vibrating key of the piano
B.
The Vibrating String Of Piano
C. the finger pressing the piano key
D. the air molecules inside the piano

Answers

Answer:

D

Explanation:

since we press the key , air molecules ate presented and sound wave is formed what we hear.

Answer:

B

Explanation:

the vibrating string of piano

This graph shows how the reaction rate of a chemical reaction changed as concentration of reactant changed. Which sentence best describes how the reaction rate changed.​

Answers

Answer:

A

Explanation:

The Reaction rate is going down which is why its at 0 And the concetration line is going up which means increasing,

Two trucks have the same mass. Which truck will have a greater amount of kinetic energy? b. The truck with less mass d. The trucks will have the same kinetic energy c. The truck with greater speed a. The truck with more mass​

Answers

Answer:

c. The truck with greater speed

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

[tex] K.E = \frac{1}{2}MV^{2}[/tex]

Where;

K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents speed or velocity measured in metres per seconds square.

From the above formula, we can deduce that the kinetic energy of an object is directly proportional to the square of the value of its velocity or speed.

Hence, the truck with greater speed would have a greater amount of kinetic energy.

Answer:

The trucks will have the same kinetic energy.

Explanation:

Both of the trucks have the same mass, so they have the same kinetic energy. Hope this helps!

What do wind energy, hydro-energy, and fossil fuel energy have in common?

Answers

Answer:

Fossil fuels store energy from the sun as

Explanation:

What type of lens is used in the viewfinder of a simple camera and why? (Concave or convex)

Answers

Answer:

convex

sorry if this is wrong

According to the law of reflection, what is the angle of incidence?

It is the angle the incident ray makes with a line drawn perpendicular to the viewer.

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface.

It is the angle the incident ray makes with a line drawn parallel to the reflecting surface.

Answers

the angle of incidence is always equal to the angle of reflection,

Explanation:

Important Information. When light is reflected from a surface, the angle of incidence is always equal to the angle of reflection, where both angles are measured from the path of the light to the normal to the surface at the point at which light strikes the surface. This equality is known as the law of reflection.

Answer:

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface

A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled's potential energy?
(Formula: PE = mgh)

Answers

Answer:

PE = 882 J

Explanation:

Through the International System we know that the gravity of the earth is 9.8 m/s², so...

Data:

m = 45 kgg = 9.8 m/s²h = 2 mPE = ?

Formula:

[tex]\boxed{\bold{PE=m*g*h}}[/tex]

Replace and solve:

[tex]\boxed{\bold{PE=45\ kg*\ 9.8\frac{m}{s^{2}}*2\ m}}[/tex][tex]\boxed{\boxed{\bold{PE=882\ J}}}[/tex]

The potential energy of the sled is 882 Joules.

Greetings.

According to the law of reflection, what is the angle of incidence?

It is the angle the incident ray makes with a line drawn perpendicular to the viewer.

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface.

It is the angle the incident ray makes with a line drawn parallel to the reflecting surface.

Answers

Answer:

It is the angle the incident ray makes with a line drawn perpendicular to the reflecting surface

If two balls have the same amount of mass and the red ball is resting at a height of 2m and the blue ball is resting at a height of 4m, which has more potential energy?
A) red ball
B) blue ball

Answers

I think it would be the blue ball so B)

Which material is a conductor?
A. chalk
B. lead
C. leather
D. paper
E. rubber

Answers

B. Lead is a conductor....

que es el periodo de un pendulo

Answers

Answer:

what

Explanation:

Answer:

El periodo del péndulo simple, para oscilaciones de poca amplitud, viene determinado por la longitud del mismo y la gravedad.

Explanation:

No influye la masa del cuerpo que oscila ni la amplitud de la oscilación. Donde: T: Periodo del péndulo.

25. Suppose there is no unbalanced force acting on a moving object. How will
the object's motion continue?
A. The speed of the object will decrease.
B. The speed of the object will increase.
C. The speed of the object will remain the same.
D. The direction of the object's velocity will change.

Answers

Answer:

C

Explanation:

Grammar is probably one of the most important components of the sciences besides math.

no unbalanced forces means that there is no force left over that cause an acceleration. All the forces are balanced.

So the Speed will not decrease. Not A.

The speed will not increase. Not B

The direction will not be affected. Not D    

The answer is C

You should set a reward for yourself for achieving a goal. A. True B. False

Answers

Answer:

A

Explanation:

Answer:

true

Explanation:

sup

A mother has the genotype Bb for brother green eyes, the months did heterozygous hair, what is the genotype of the father ?

Answers

Assuming brown hair (B) color is completely dominant over blond hair (b), then the father's genotype must be bb.

How many valence electrons does the hydrogen and oxygen have in the following picture?

Answers

Answer:

can u make the picture less blurry pls

Explanation:

How does a recessive allele “show up” to be seen?

Answers

Answer:

Recessive alleles only show their effect if the individual has two copies of the allele.  

Explanation:

Dominant and Recessive Alleles If your allele pair is FF or Ff, you will have freckles. The only way you can escape a freckled face is to inherit the recessive gene from each parent, giving you the ff allele pair. In general, recessive alleles show up in your phenotype only if you have two of them.

The voltage in a battery is 9 volts. The resistance is 3 ohms. What is the current? USE CORRECT UNITS!

Answers

Answer: Lol “USE CORRECT UNITS!” I GOT YOU BABES: 9/3=3 current is 3 amperes.

Explanation:

which type of star cluster forms from tightly packed groups or older stars ?
binary
eclipse
globular
open

Answers

the answer is globular :)

Globular star clusters form from tightly packed groups and/or older ancient stars.

What are globular star clusters?

Globular star clusters can be defined as ancient stars packed in a spherical and/or symmetrical shape.

Globular star clusters represent the most common types of groups (i.e., clusters) of ancient stars.

These groups of stars (globular) are characterized to be densest in the center of the cluster.

In conclusion, globular star clusters form from tightly packed groups and/or older ancient stars.

Learn more about globular star clusters here:

https://brainly.com/question/21379923

Three dogs scout sparky and dusty are playing with a teddy bear. Scout and sparky are pullung the teddy bear to the left

Answers

Answer:

To the left side.

Explanation:

The teddy bear will move towards the left side because more force is applied by scout and sparky than dusty. The reason for this movement of teddy bear  to the left is due to more force is applied by the two dogs present at the left side of the teddy bear while on the other hand, one dog is present at the right side of teddy bear which applied less force so that's why we can say that the teddy bear moves to the left side rather than to the right side.

what is matter explain​

Answers

Matter is the Stuff Around You
Matter is everything around you. Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).

How do the nuclei of covalently bonded atoms help keep the bond together?

Neutral particles in the nucleus provide enough mass that the force of gravity holds the atoms together.
Neutral particles in the nucleus can become positive or negative in order to balance the charges.
Positive particles in the nucleus change into negative particles that enter electron shells.
Positive particles in the nucleus are attracted to shared electrons, so the atoms stay close together.

Answers

Answer: D.

Explanation:

Answer: The answer is D

Explanation: I got it right on my test

A marble is dropped into a graduated cylinder that is filled with water. Use the words

from the word bank to describe the speed and forces. Words may be used more than

once.

Point A: Speed

force

A

Point B: Speed

force

ml

Point C: Speed

force

30

B

20

is constant

increases

decreases

balanced

unbalanced

C

Answers

Answer:

v_t = [tex]\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }[/tex]

Explanation:

Let's describe the motion and forces on the marble when it falls into the graduated cylinder filled with water.

Initially, the marble in the air falls under the influence of its weight (gravity force), when it enters the water, a friction force appears that INCREASES with SPEED and opposes the movement, this force is called Stokes force.

             

              Fr = 6π R η v

where η is the viscosity of water

also because of this in a liquid it has an upward thrust, given by Archimedes' law, this thrust is CONSTANT

              B = ρ_l g V_l

in that case the volume of liquid(V_l)  is equal to the volume of the marble.

Constant force of gravity

               W = mg

using the concept of density

                ρ_body = m / V

                W = ρ_body g V_body

we apply Newton's second law

                Fr + B - W = ma

the friction force increases and the other two are constant, so acceleration decreases until reaching zero, at this point the forces are in BALANCE

                Fr + B - W = 0

and the speed remains constant, being called TERMINAL SPEED

                v_t = [tex]\frac{2 g \ ( \rho_b - \rho_l ) r^2 }{9 \ \eta }[/tex]

from this point on, the displacement is proportional to the time

What is rising temperatures

Answers

Answer:

i don't know but have a good day

5. What structure did Friedrich Kekule discover that allowed carbon atoms can bond
with up to four other atoms at the same time?

Answers

benzene was a ring of six carbon atoms! This was the structure that made him well known around the world

The Universal Space Agency wants to know the results of your Sim investigation. Write your report to the lead chemist, explaining why the staff can smell the chocolate bar. Use evidence from your investigation in your explanation.

Answers

Answer:

Condensation can also produce water droplets on the outside of soda cans or glasses of cold water. When warm air hits the cold surface, it reaches its dew point and condenses. This leaves droplets of water on the glass or can. When a pocket of air becomes full of water vapor, clouds form.

Explanation:

Which shows that energy is being transformed?
A. A swinging pendulum
B. A ream of paper inside a box
C. A candle resting on a table
D. A glass inside a cabinet​

Answers

Answer:

A

Explanation:

I think it's A, sorry if I'm wrong

Answer:

I think its (A)

Explanation:

correct me if im wrong

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