**Answer:**

C). Dinosaurs

**Explanation:**

A football team lost 3 yards on their first play. On the second play, 10 yards were gained. On the third play the quarterback got tackled behind the line of scrimmage and lost 6 yards. What was their net gain or loss after the three plays?

+1yd

Explanation:

Kfgjjh

**Answer:**

+1 YD

**Explanation:**

-3 + 10 - 6 = 1

Two protons are a distance 3 10-9 m apart. What is the electric potential energy of the system consisting of the two protons

**Answer:**

**The electric potential energy of the system is 7.87x10⁻²⁰ J.**

**Explanation:**

The electric potential energy is given by:

[tex]E = \int{Fdr} = \frac{Kq_{1}q_{2}}{r}[/tex]

Where:

q₁ = q₂ is the charge of the protons = 1.62x10⁻¹⁹ C

r is the distance = 3x10⁻⁹ m

K: is the electrostatic constant = 9x10⁹ Nm²/C²

[tex] E = \frac{Kq_{1}q_{2}}{r} = \frac{9\cdot 10^{9} Nm^{2}/C^{2}*(1.62 \cdot 10^{-19} C)^{2}}{3\cdot 10^{-9} m} = 7.87 \cdot 10^{-20} J [/tex]

**Therefore, the electric potential energy of the system is 7.87x10⁻²⁰ J.**

I hope it helps you!

The **electric potential energy** of the **system** should be **7.87x10⁻²⁰ J.**

SInce We know that

fdr = kq1q2/r

Here

q₁ = q₂ i.e. is the **charge** of the **protons** = 1.62x10⁻¹⁹ C

r should be the **distance **= 3x10⁻⁹ m

K should be the **electrostatic constant **= 9x10⁹ Nm²/C²

Now electric potential energy should be

= (9x10⁹ Nm²/C² * 1.62x10⁻¹⁹ C) / 3x10⁻⁹ m

= 7.87x10⁻²⁰ J.

hence, The **electric potential energy** of the **system** should be **7.87x10⁻²⁰ J.**

learn more about **energy** here: https://brainly.com/question/17384612

a Venus fly trap is an......... plant.

**Answer:**

A Venus flytrap is a perennial carnivorous plant.

I hope it helps

**plant that eats meat**

a box with a Constance velocity has a 5 N of force applied to it from all sides and direction. what will happen to the motion of the box as result?

A-the object will come to rest

b-the velocity of the object will remain the same

c- the velocity of the object will decrease

d- the velocity of the object will increase

**Answer:**

b-the velocity of the object will remain the same

**Explanation:**

Forces from opposite sides cancel each other, so there is no net force on the box that would affect its motion. The velocity of the box will remain unchanged.

__

(The box may be crushed, but it will continue in the same direction at the same speed.)

**Answer:**

**b the velocity of the object will remain the same **

**Explanation:**

use your brain:)

Suppose a signal from a vibrating motor is to be sampled discretely with a digital data acquisition system to determine the RPM of the motor. It is known that the maximum possible RPM is 1800. What is the minimum sampling frequency (in Hz) with which the signal can be sampled in order to measure the RPM of the motor

**Answer:**

**f > 60 Hz**

**Explanation:**

[tex]f = \frac{1800 rev}{min} * \frac{1 min}{60 sec} = 30 Hz[/tex]

Per Nyquist, fs > 2*30 Hz ⇒ **fs > 60 Hz**

On a hot day, you sit on the edge of a pool and dip your feet into the water, causing changes to occur that are related to the physical and thermal properties of your feet and of the water. Select the statements that accurately describe what is happening, in terms of the heat and temperature of the objects and substances. There may be more than one accurate statement.

The **true statements** are;

Heat from your feet **raises **the temperature of the water.

Your feet** transfer heat **into the surrounding water, reducing the temperature of your feet. B and C

The term** thermal changes** has t do with the changes in the heat properties of the substance. We know that when you put your leg in water there is a **thermal exchange** between the water and your leg.

Owing to the fact that heat is transferred from your leg to the water, your leg will **feel cool** while the temperature of the water will **increase **slightly.

Having said all these, the **true statements** are;

Heat from your feet **raises **the temperature of the water.

Your feet** transfer heat **into the surrounding water, reducing the temperature of your feet.

Learn more about **thermal exchange**:https://brainly.com/question/7230756

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Missing parts;

On a hot day, you sit on the edge of a pool and dip your feet into the water, causing changes to occur that are

related to the physical and thermal properties of your feet and of the water. Select the statements that

accurately describe what is happening, in terms of the heat and temperature of the objects and substances.

There may be more than one accurate statement.

A. Cold from the water reduces the temperature of your feet.

B. Heat from your feet raises the temperature of the water.

C. Your feet transfer heat into the surrounding water, reducing the temperature of your feet.

D. Cold from the water moves into your warm feet.

I WILL GIVE BRAINLIEST

In which of the following locations would most likely find parenchyma cells? Leaves roots flowers bark

**Answer:**

I would guess its leaves

**Answer:**

Leaves

**Explanation:**

Help me please :)

Answer the following questions to explain the relationship between electricity and magnetism.

• What are the critical components of an electromagnet and what purpose do they each serve?

• How can the strength of an electromagnet be changed?

• Why is an electromagnet considered a temporary magnet?

Answer the following questions about motors and generators.

• What components are needed for a generator to produce electric current?

• Describe motors and generators in terms of energy input and output.

HELP MEEEEEEEE

Decide if the following statements would be found in the Motor or Generator. Answers can be found at the end of the 3.07 Reading.

Statement Motor or Generator?

**Answer:**

R u from k12?? i am XD add me on discord my username is Hot Boy#1650

**Explanation:**

Why is our (a person's) gravitational pull NOT as strong as the Earth's gravitational pull

on us?

Gravity doesn't act on us

The Earth is closer to us than the Moon

Our mass doesn't change so the pull is really the same

We are much smaller than the Earth.

**Answer:With gravity, two things with mass will want to move toward each other. However, we humans don't feel our gravity pulling on another person because it's not very big, but we do all feel the pull of Earth's gravity all the time - we're not all floating in the air, because that would be happening without Earth's gravity!**

**Explanation:**

BRAINLIEST. Agraph is probelow. The graph shows the speed of a car traveling east over a 12 second period. Based on the information in the graph, it can be

that in the first second

Answer:speeding up constantly

Explanation:

The **graph **between the **time **and the **speed **of the car shows that the speed is **increasing **constantly, so, option C is **correct**.

A **moving **object's rate of change in **distance **traveled is measured as **speed**. Speed is a **scalar**, which implies it is a measurement with a magnitude but no **direction**.

A thing that moves quickly and with high speed, covering a lot of ground in a short time. On the other hand, a slow-moving object traveling at a low speed covers a comparatively small distance in the same amount of time. An object with zero speed does not move at all.

**Given**:

The graph shows the speed of a car traveling east over a 12-second period,

As you can see from the graph, at time t = 0 sec the speed is 10 m/s,

At t = 3 sec, the speed = 15.3 m/s

At t = 6 sec, the speed = 20.3 m/s

Thus, speed is increasing constantly.

To know more about **Speed**:

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What is your role in motivating yourself?

**i typically focus on motivating others.. i wanna be a motivational speaker someday. tbh if anyone needs anyone to talk to id be happy to listen and i would give the best advice i can. heres my discord: ionknow22#2868**

Pressure and temperature ______ with depth below Earth’s surface.

**Answer:**

Pressure increases as you move deeper below earth's surface.

Tempurature increases as you move deeper below earth's surface.

Hope this helps!

**Explanation:**

block of mass m sits at rest on a rough inclined ramp that makes an angle with the horizontal. What must be true about normal force F on the block due to the ramp

Answer:

Explanation:

For a body on a ramp with mass m, the forces acting on the body along the vertical component are the weight and the normal reaction.

The weight of the body acts in the negative y direction while the normal reaction acts in the positive y direction

Taking the sum of forces along the y component

Sum Fy = -W+R = ma

Since acceleration is zero

-W+R = m(0)

-W+R = 0

-W = -R

W = R

Hence the Normal reaction force acting on the on the body is equal to normal force

During which process of the water cycle does water change from a gas to liquad

Condensation is the process by which water vapor in the air is changed into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.

Who ever answers first get Brainliest!

How is power passed down in a dynasty?

through a family bloodline

through a religious council

through an arranged marriage

through a military commander

Through a family bloodline

Your answer should be Through a family bloodline ;)

Hope this helps ..

Hope this helps ..

A car starts from rest and accelerates for 7.2 s with an acceleration of 1.4 m/s2. How far does it travel? Answer in units of m.

**Answer:**

xn = 36.28 [m]

**Explanation:**

To solve this problem we must use the following equation of kinematics, which is ideal for a body that moves with constant acceleration.

[tex]x=x_{0}+(v_{o} *t)+(\frac{1}{2} )*a*t^{2}[/tex]

where:

x - xo = displacement of the car [m]

Vo = initial velocity = 0

t = time = 7.2 [s]

a = acceleration = 1.4 [m/s^2]

The initial velocity is zero, as the car begins its movement from rest.

xn = (x - xo), Now replacing

xn = (0*7.2) + 0.5*1.4*(7.2^2)

xn = 36.28 [m]

A car at the top of a ramp starts from rest and rolls to the bottom of the ramp, achieving a certain final speed. If you instead wanted the car to achieve twice as much speed at the bottom of the ramp, how high should the ramp be compared to the first case

**Answer:**

**It must be 4 times high.**

**Explanation:**

⇒ [tex]m*g*h = \frac{1}{2} * m*v^{2}[/tex]

Let's call v₁, to the final speed of the car, and h₁ to the height of the ramp.So, at the bottom of the ramp, all the gravitational potential energy

must be equal to the kinetic energy of the car (Defining the bottom of

the ramp as our zero reference for the gravitational potential energy):

[tex]m*g*h_{1} = \frac{1}{2} * m*v_{1} ^{2}[/tex] (1)

Now, let's do v₂ = 2* v₁Replacing in (1) we get:[tex]m*g*h_{2} = \frac{1}{2} * m*(2*v_{1}) ^{2}[/tex] (2)

Dividing (2) by (1), and rearranging terms, we get:The Intensity level of a loud saw is 100 db at a distance of 5m. At what distance would the level be 80 db

**Answer:**

50 m

**Explanation:**

The relationship between the intensity of sound in dB and distance is given by the formula:

[tex]B_2=B_1+20log(\frac{R_1}{R_2} )\\\\Where \ B_2\ is \ the\ sound\ intensity\ at\ distance\ R_2\ and\\B_1\ is \ the\ sound\ intensity\ at\ distance\ R_1\ \\\\Given\ that: B_1=100\ dB, R_1=5\ m, B_2=80\ dB\\\\B_2=B_1+20log(\frac{R_1}{R_2} )\\\\80=100+20log(\frac{5}{R_2} )\\\\-20=20log(\frac{5}{R_2} )\\\\log(\frac{5}{R_2} )=-1\\\\\frac{5}{R_2}=10^{-1}\\\\\frac{5}{R_2}=0.1\\\\R_2=5/0.1=50\ m[/tex]

A chef places an open sack of flour on a kitchen scale. The scale reading of

40 N indicates that the scale is exerting an upward force of 40 N on the sack. The magnitude of this force equals the magnitude of the force of Earth’s gravitational attraction on the sack. The chef then exerts an upward force of

10 N on the bag and the scale reading falls to 30 N.Draw a free-body diagram of the latter situation.

**Answer:**

**Explanation:**

Given

Initial reading on scale =40 N

So, we can conclude that weight of the sack is 40 N

After this a 10 N force is applied upward on the sack such that the net force becomes (40-10) N downward (because downward force is more)

This net downward force is the resultant of earth graviational pull and the applied upward force.

So, this downward force acts on the machine which inturn applies an upaward force of same magnitude called Normal reaction.

This situation can be diagramatically represented by figure given below

**Answer:**

40N

**Explanation:**

trust

Peter is running laps around a circular track with a diameter of 100 meters. If it takes Peter 12 minutes to run 4 laps, how quickly is he running (in meters per second)?

**Answer:**

v = 1.74 m/s

**Explanation:**

Given that,

Diameter of a circular track, d = 100 m

Distance covered for the 4 laps,

[tex]D=4\pi d\\\\D=4\pi \times 100\\\\D=1256.63\ m[/tex]

Time, t = 12 minutes = 720 s

**We need to find the velocity of the peter. It can be calculated as follows :**

[tex]v=\dfrac{D}{t}\\\\v=\dfrac{1256.63\ m}{720\ s}\\\\v=1.74\ m/s[/tex]

**So, the speed is running with a velocity of 1.74 m/s. **

**Peter **is **running **at** 1.7453 m/sec.**

Given to us,

**Diameter **of the **circular track, D **= 100 meters,

**Number **of **laps Peter run**, L = 4 laps,

**Time taken **by **Peter**, t = 12 minutes,

1 lap = **circumference **of the **circle,**

4 laps = 4 x **circumference **of the **circle,**

As we know, the **circumference **of a **circle **is **given **by **πD.**

So, 4 **laps **= 4 x **circumference **of the **circle,**

[tex]\begin{aligned}4 laps &= 4\times \pi \times D\\&= 4 \times \pi \times 100\\& = 1,256.6370\ meters\\\end{aligned}[/tex]

Also, we know that** 1 minute** has **60 sec.**

so, 4 minutes = (4 x 60) **seconds**

Further, **speed **is given [tex]\bold{(\dfrac{Distance}{Time} )}[/tex]

Thus,

[tex]\begin{aligned}speed &= \dfrac{Distance\ coverd\ by\ Peter}{Time\ taken\ by\ Peter}\\&=\dfrac{1,256.6370}{12\times 60}\\&=1.7453\ m/sec \end{aligned}[/tex]

Hence, **Peter **is **running **at** 1.7453 m/sec.**

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A fountain shoots a jetof water straight up. The nozzle is 1 cm in diameter and the speed of the water exiting the nozzle is 30 m/s. What is the force exerted by the water jet

**Answer:**

**Explanation:**

mass of water coming out per second = A x v where A is area of cross section of the nozzle and v is velocity of water

A = 3.14 x .005²

= 785 x 10⁻⁷ m²

mass of water coming out per second = 785 x 10⁻⁷ x 30 = 23.55 x 10⁻⁴ kg

momentum of this mass = 23.55 x 10⁻⁴ x 30 = 706.5 x 10⁻⁴ kg m /s .

Rate of change of momentum = 706.5 x 10⁻⁴

Let force be F

F - mg = 706.5 x 10⁻⁴

F = mg + 706.5 x 10⁻⁴

F = 23.55 x 10⁻⁴ x 9.8 + 706.5 x 10⁻⁴

= 937.3 x 10⁻⁴ N .

A recipe gives the instructions below

After browning the meat pour off fat from the pan to further reduce fat use a strainer.

what type lf separation methods are described in the recipe

A decantation and screening

B distillation and screening

C decantation and centrifugation

D distillation and filtration

**Answer:**

**A. decantation and screening
**

**Explanation:**

Decantation is the one of the process of separating the mixture. In this process the precipitated liquid is separated from the solid. According to the given instruction for the recipe, the fat which is in liquid state is separated from meat. In the process of screening, more liquid is separated by placing the mixture on the screen. Here, the gravity plays an important role for the process of separation.

**Answer:**

a

**Explanation:**

A person following a liberal ideology would likely approve of

i’m

not sure sorry :5

not sure sorry :5

A "lovesick" individual wants to throw a bag of candy and love notes into the open window of their significant other’s bedroom 10.0 m above. Assuming it just reaches the window, they throw the gift at 60.0o to the ground: At what velocity should they throw the bag? How far from the house are they standing when they throw the bag? (Answer: A. 16.2m/s B. 11.5m)

**Answer:**

**Explanation:**

Let the velocity be v .

vertical component of the velocity = v sin 60 = √3 v /2

it reaches maximum height of 10 m .

v² = 2 gh

( √3 v/2 )² = 2 x 9.8 x 10

3 v² = 196 x 4

v² = 65.33 x 4

v = 16.2 m /s

Let time taken to reach height of 10 m

v = u - gt

v sin 60 = 9.8 t

16.2 x √3 /2 = 9.8 t

t = 1.43 s

horizontal distance covered = v cos 60 x t

16.2 x .5 x 1.43 = 11 .5 m

How do I proton and and electron compared

What’s the question?

waht is science

wjwissbsskdldmndndnd

**Answer:**

the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

**Explanation:**

Calculate the effective charges on the H and F atoms of the HF molecule in units of the electronic charge, e.

**Answer:**

**Explanation:**

Hydrogen fluoride (HF) is an ionic/electrovalent compound that dissociates into ions when dissolved in water. It's dissociation is as seen below

HF ⇄ H⁺ + F⁻

There is a transfer of electron from the hydrogen atom which produces the hydrogen ion (H⁺), while the fluorine atom receives the donated ion to become negatively charged (F⁻). The amount of charge in one electron is generally given as 1.602 × 10⁻¹⁹ coloumbs.

The required value of **effective charge** on **HF** molecule, due to** H** and **F** is **1.602 × 10⁻¹⁹ Coulombs**.

The given problem is based on the concept of **effective charges**. The net positive charge carried out by the electrons of atomic species, after forming a **polyelectronic atom** is known as **Effective charge**.

As per the given problem, the Hydrogen fluoride (HF) is an **ionic/electrovalent** compound that **dissociates** into ions when dissolved in water. It's dissociation is given as,

**HF ⇄ H⁺ + F⁻**

There is a transfer of electron from the **hydrogen** atom which produces the **hydrogen ion (H⁺)**, while the fluorine atom receives the donated ion to become negatively charged (F⁻). The amount of **charge** in one **electron** is generally given as **1.602 × 10⁻¹⁹ Coulombs**.

Thus, we can conclude that the required value of **effective charge** on HF molecule, due to H and F is ** 1.602 × 10⁻¹⁹ Coulombs**.

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Please provide explanation!!!

Thank you.

**Answer:**

(a) 102 cm/s

(b) 0.490 cm²

**Explanation:**

(a) Use Bernoulli equation.

P₁ + ½ ρ v₁² + ρgh₁ = P₂ + ½ ρ v₂² + ρgh₂

0 + ½ ρ v₁² + ρgh₁ = 0 + ½ ρ v₂² + 0

½ ρ v₁² + ρgh₁ = ½ ρ v₂²

½ v₁² + gh₁ = ½ v₂²

½ (25.0 cm/s)² + (980 cm/s²) (5.00 cm) = ½ v²

v = 102 cm/s

(b) The flow rate is constant.

v₁ A₁ = v₂ A₂

(25.0 cm/s) (2.00 cm²) = (102 cm/s) A

A = 0.490 cm²

3 For this force system the equivalent system at P is ___________ A FRP 40 lb along x dir and MRP 60 ft lbB FRP 0 lb and MRP 30 ft lbC FRP 30 lb along y dir and MRP 30 ft lbS FRP 40 lb along x dir and MRP 30 ft lb

This question is incomplete, the complete question is;

For this force system the equivalent system at P is ___________

A) FRP = 40 lb (along +x-dir.) and MRP = +60 ft.lb

B) FRP = 0 lb and MRP = +30 ft.lb

C) FRP 30 lb (along +y-dir.) and MRP = -30 ft.lb

D) FRP 40 lb (along +x-dir.) and MRP = +30 ft.lb

**Answer:**

**D) FRP 40 lb (along +x-dir.) and MRP = +30 ft.lb**

**Explanation: **

From the figure in the image i uploaded along this answer;

FRP = ( 40 lb i + 30 lb j ) + [30 lb (-j)]

Where i and j are the unit vectors along X & Y axis respectively.

So, FRP = 40 lb i

that is, FRP = 40 lb along +X direction

MRP = [ 30 lb x ( 1 ' + 1' ) ] +( -30 lb x 1 ' )

= (30 lb x 2 ' )- 30 lb ft

= 60 lb ft - 30 lb ft

** = 30 lb ft**

**Therefore option(D) is correct **

(iii) Why do right angle mirrors produce three images of the object?

**Explanation:**

**The two mirrors inclined to each other formed the first two images with are of the same size as the object while the third mirror is produced from the intersection of rays that emanated during the production of the first two images to produce a third image which is smaller than the object and there making the total number of images to be 3.**

**Hence this mirrors produces 3 images due to the third image formed from the intersection of the rays that produces the first two images.**

The formula that relates the image produced by inclined mirror and the angle of inclination is expressed as:

number of images n = 360/θ - 1

θ is the angle of inclination of the two mirrors

n is the number of images

If the mirrors are inclined at right angles, then θ = 90°

Substitute into the formula;

n = 360/90 -1

n = 36/9 -1

n = 4-1

n = 3

Under Khrushchev, how did the USSR proceed in the arms race with the US?They developed new and powerful weapons.They used weapons to invade other countries.They attacked dissenters with advanced weapons.They manufactured more weapons than other countries.
When did Alexander the Great take the throne?O 536 BCE0 436 BCE0 336 BCE 236 BCE
Which of the following groups would have most strongly objected to the plansoutlined in the portions of the Treaty of Paris (1783) included in this passage?A. Poor American farmers in the Appalachian MountainsB. Members of the Patriot movement in New EnglandC. Native Americans in the Ohio River ValleyD. Political and military leaders in France
Driving automobiles and burning coal for electricity are examples of two human activities that negatively impact _______.
Write the proportional equation that represents the table below.
State Hess' law of constant heat summation.(b) Calculate the enthalpy of formation of CH4 from the following data:i) C(s) + O2(g) CO2(g); H = -393.7 kJ/molii) H2(g) + 12 O2(g) H2O(l); H = -285.8 kJ/moliii) CH4(g) + 2 O2(g) CO2(g) + 2H2O(l); H = -890.4 kJ/mol
12. The table shows the height in feet of a stack of medium sized moving boxes. What is the height of a stack of 14 boxes
Cualquiera de las dos rectas puede ser la de pendiente 1 o pendiente 2, slo hay queconservarla hasta el final de la operacin.BLOFrmula que vamos a aplicar:m-m1+m-mtan 0=Pendiente de la recta 3x - 4y + 8 = 0Pendiente de la recta 2x + 3y - 23 = 0Sustitucin de datostan 0 =Al realizar la operacin de la frmula se obtiene la tangente del ngulo, por lo que hayque buscar el inverso de la tangente, que es el valor del ngulo de interseccin entrelas rectas dadas.tan 8 =El valor del ngulo e es
True or False: Squires were servants to medieval peasants.
A mi madre ___gusta bailar en el club.
Choose the correct verb:The feeder (use, used) to be under a big tree in our backyard. o use o used
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Guys pls answer this for me in a minute it is really hard
WILL GIVE BRAINLST FOR WHOEVER ANSWERS FIRST Which of the following equations is equivalent to 6(3p 2) = 20?Group of answer choices9p 4 = 209p 8 = 2018p 12 = 2018p 2 = 20
How was DNA evidence used to prove that Dr. Sam Sheppard did not murder his wife?
what are the main pros of cloning
In a factor market, firms deliver payments in all of the following forms EXCEPT:A.rentB.profitC.loansD.wages
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Marge's plan costs .14 cents per minute plus a monthly fee of $24. Dan's plan costs .12 cents per minute plus a monthly fee of $28. How many minutes (m) are required for both plans to cost the same for the month?