Someone please help me! Please help

Someone Please Help Me! Please Help

Answers

Answer 1

Answer:

Explanation:

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Related Questions

While driving his sports car at 20.0 m/s through a residential neighborhood, Royston
comes up behind a slow-moving grandma and decides to pass her on the left. If
Royston can accelerate at 6.00 m/s2, how long will it take for him to reach a velocity of
30.0 m/s?

Answers

Answer:

1.67s

Explanation:

Given parameters:

Initial velocity  =  20m/s

Acceleration  = 6m/s²

Final velocity  = 30m/s

Unknown:

Time taken  = ?

Solution:

Acceleration is the rate of change of velocity with time. It is mathematically expressed as;

 Acceleration = [tex]\frac{v - u }{t}[/tex]  

v is the final velocity

u is the initial velocity

 t is the time taken

            6  =[tex]\frac{30 - 20}{t}[/tex]  

            6  = [tex]\frac{10}{t}[/tex]  

              10  = 6t

              t  = 1.67s

I had to show a screenshot of this because brainly thinks it detects a bad word​

which statements describe kinetic and potential energy? check all that apply.

Answers

Answer:

ACDE

Explanation:

Energy is generally described as the ability to do work by a body. There are two main forms of energy which are the kinetic energy and the potential energy.

Other energy forms stems from these two energy types.

Potential energy expressly deals with the position of a body. It is mathematically given as:

             Potential energy  = mass x acceleration due to gravity x height

It is the energy stored based on the position of particles within a medium

These description satisfies options A, C

Kinetic energy is the energy due to the motion of body. It is mathematically given as:

             Kinetic energy  = [tex]\frac{1}{2}[/tex] x mass x velocity²

Also, kinetic energy is directly proportional to the velocity of a body.

The description satisfies DE

please help! you are amazing! brainliest too!

NASA helps fund science education.

Which statement about scientific knowledge is false?

A. Understanding science can help people make wiser purchases.
B. People with more knowledge of science are always healthier.
C. People with college degrees in science often earn high salaries.
D. Science education can help people understand the universe.

Answers

I think it’s B hope it helps:)

Answer:

I think its B and I don't know why my words are like this

Explanation:

Find the electric field E⃗ (r⃗ )E→(r→)E_vec(r_vec) inside the sphere (for rrr< aaa) in terms of the position vector r⃗ r→r_vec. Express your answer in terms of r⃗ r→r_vec, rhorhorho (Greek letter rho), and ϵ0ϵ0epsilon_0.

Answers

Solution :

Using the Gauss law, the electric field intensity of a sphere is given by :

[tex]$E. 4 \pi r^2 = \frac{Q_{enc}}{\epsilon_0}$[/tex]

[tex]$E = \frac{Q_{enc}}{4 \pi r^2 \epsilon_0}$[/tex]

Now the enclosed charge inside the sphere (r<a) is

[tex]$Q_{enc}= \rho V$[/tex]

[tex]$Q_{enc}= \rho \left( \frac{4}{3} \pi r^3 \right)$[/tex]

Hence, the electric field intensity becomes as follows :

[tex]$E= \frac{\rho \left(\frac{4}{3} \pi r^3\right)}{4 \pi \epsilon_0 r^2}$[/tex]

[tex]$E =\frac{\rho r}{3 \epsilon_0}$[/tex]

Thus, the electric field inside the sphere is given by :

[tex]$\vec {E} = \frac{\rho \vec{r}}{3 \epsilon_0}$[/tex]


A bag weighing 20 N is pushed horizontally a distance of 35 m across a
level floor by a force of 10 N, How much work is done on the bag in
Joules? W=Fd *

Answers

Answer:

350J

Explanation:

Given parameters:

Weight of bag  = 20N

Distance moved horizontally  = 35m

Force applied  = 10N

Unknown:

Work done on the bag  = ?

Solution:

Work done is the force applied to move a body through given distance.

  Work done  = Force applied x distance

So;

 Work done  = 10 x 35  = 350J

what is the foemula for this problem

Answers

The formula of this problem is 450 divided by 35

what voltage produces a current of 100 amps with a resistance of 50 ohms

Answers

[tex]\bf{ \underline{Given:- }}[/tex]

[tex] \sf• \: Current \: (I) = 100 \: Amps.[/tex]

[tex] \sf• \: Resistance \: (R) = 50 \: ohms[/tex]

[tex] \\ [/tex]

[tex]\bf{ \underline{To \:  Find:- }}[/tex]

[tex] \sf• \: Voltage \: (V)[/tex]

[tex] \\ [/tex]

[tex] \huge\bf{ \underline{Solution:- }}[/tex]

[tex] \bf \red{ \bigstar{ \: The \: formula \: of \: Voltage \: (V) = IR}}[/tex]

[tex] \rightarrow \sf V = 100 \times 50[/tex]

[tex] \rightarrow \sf V = 5000[/tex]

[tex] \\ [/tex]

[tex] \bf \purple{Therefore, \: Volatage \: is \: 5000 \: v.}[/tex]

a girl pushes her little brother down a snowy hill on a sled and he rides quickly to the bottom of the hill

which one of Newton's Laws is this ​

Answers

Answer:

Newton's First Law of Motion.

Explanation:

Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.

In physics, Sir Isaac Newton's First Law of Motion is known as law of inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.

In this scenario, a girl pushes her little brother down a snowy hill on a sled and he rides quickly to the bottom of the hill. The push from the little boy's sister is the external force acting on him and consequently, causing him to be in motion down the snowy hill.

examine this diagram of the human heart. what is the structure indicated by the arrow?

I unfortunately can't post a picture because I am uploading this question from my computer but I will do my best to describe the image.
It's a normal picture of a human heart, but there is an artery going down and there is an artery going to the right, I need the name of the artery going to the right because that is what the arrow is pointing at.

A. The Pulmonary Artery
B. The Pulmonary Vein
C. The Superior Vena Cava
D. The Aorta

Answers

Answer:

Right coronary artery

Explanation:

Right coronary artery (RCA). The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes, which regulate the heart rhythm.

Answer:

A.) Pulmonary artery

Explanation: Someone told me Aorta and i got it wrong....

Calculate the momentum of a boat with a mass of 95kg moving at 2m/Ss

Answers

Answer:

190 kg m/s

Explanation:

Momentum = Velocity × Mass

→ Substitute in values

2 × 95 = 190 kg m/s

The momentum of the boat of mass 95 Kg moving at 2 m/s will be 190 Kg m/s.

What is Momentum?

Momentum is defined as the product of mass of velocity. Momentum is a vector quantity. Mathematically, we can write momentum as -

p = mv

It is also the measure of the impact force imparted by any moving object, when it comes in contact with some other body.

Given is a boat with a mass of 95 Kg moving at 2 m/s.

Mass [m] = 95 Kg

Velocity [v] = 2m/s

We can write the momentum as -

p = mv

Substituting values, we get -

Momentum [p] = 95 x 2 = 190 Kg m/s

p = 190 Kg m/s

Therefore, the momentum of the boat of mass 95 Kg moving at 2 m/s will be 190 Kg m/s.

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When we stretch a spring, which two factors affect how much elastic
potential energy is stored in it

Answers

mass and gravitational field

A highway speed limit is posted as 90 km/hr. Is this average speed or instantaneous speed? Explain your answer.

Answers

Answer: instantaneous speed.

Explanation: A highway speed limit posted as 90km/hr would be the instantaneous speed because it’s just the speed for that moment.

what force acts between earth and the moon

Answers

Explanation:

Gravity

Gravity is one major force that creates tides. In 1687, Sir Isaac Newton explained that ocean tides result from the gravitational attraction of the sun and moon on the oceans of the earth (Sumich, J.L., 1996).

Martha, a first-grade teacher, is worried that if doesn't stay In at work to grade papers her principal will think she is lazy She is also worried that if she stays late at work her partner will be angry. This of conflict is known as

Answers

The type of conflict Character vs self

Answer:

Character vs self

Explanation:

The reason is because Martha is thinking to much about the negative things and it is making her feel like she is fighting her own body for control.

3,000ml of an unknown liquid has a mass of 3 kg. What is its density?

Answers

Answer:

Ro = 1000 [kg/m³]

Explanation:

We must remember that density is defined as the relationship between mass and volume.

[tex]Ro=m/V\\[/tex]

where:

Ro = density [kg/m³]

m = mass = 3 [kg]

V = volume = 3000 [ml]

We must convert the volume of milliliters to cubic meters

[tex]3000[ml]*\frac{0.001Lt}{1ml}*\frac{1m^{3} }{1000Lt} = 0.003m^{3}[/tex]

Now replacing:

[tex]Ro=3/0.003\\Ro=1000[kg/m^{3} ][/tex]

The time for a sound wave to travel between two people is 0.80 s,
The people are 256 m apart
Calculate the speed of sound in air.

Answers

Answer:

Explanation:

Using the below formula

Speed of sound = ( distance between observers) *2/(total time taken)

Now putt the given values ,

time taken = 0.80 sec

distance = 256 m

hence

V of sound= 256*2/0.80

V of sound = 640 m/sec

Jeremy walked at an average rate of speed of 5 km/h. how far had Jeremy walked in 15 minutes?

Answers

Answer:

1 half kilometer is right answer

Well if we know he can walk 5km in one hour (or 60 minutes) we can do ratios,,,

Km : minutes
5 : 60
: 15


We can do 5 divided by 60 multiplied by 15 to get the unknown km

This will give us 5/4 or 1.25

So he can walk 1.25 km in 15 minutes.


Hope this helps! Any questions let me know :)

A car has a mass of 1500 kg and accelerates at a rate of 15 m/s^. What was the force applied?

Answers

Answer:

22500N

Explanation:

Given parameters:

Mass of the car  = 1500kg

Acceleration  = 15m/s²

Unknown:

Force applied  = ?

Solution:

From Newton's second law of motion:

  Force  = mass x acceleration

So

     Force  = 1500 x 15  = 22500N

Explain how are position time, velocity, and acceleration related to each
other?

Answers

I had this question before I think was it A or B.

An object of mass m is placed on Spring A, which is compressed by distance x. The spring is released and the velocity of the pushed object as it leaves the spring is measured. The experiment is repeated with the same object on Spring B, which is compressed by the same distance x. The object travels faster when pushed by Spring B. What can be concluded?

A .Spring A had a higher elastic potential energy than Spring B.
B. Spring A's spring constant is higher than Spring B's.
C. Spring A's spring constant is lower than Spring B's.
D. Spring A has more mass than Spring B.

Answers

Answer:

C

Explanation:

2. Which animal is a primary consumer in the Ethiopian Highlands?
walia ibex
tiger
black lion
prairie dog

Answers

Answer: Wallia Ibex

Explanation: Black lions and tigers are not primary consumers. However, the Wallia Ibex is a primary consumer, hope it helps :D.

Show the steps im confused.
The answer is 14 m/s

Answers

Answer:

14 m/s

Explanation:

KE=1/2mv^2

5880J= 1/2(60kg)v^2

5880J=(30)(V^2)

5880/30=V^2

196=v^2

square root of 196 is 14

So u divide the mass by two
Then KE/M and square root it
And u should end up with (image)
And solve

I’m not good at explaining
I hope this helps:)

A 2 cm object is 10 cm from a convex lens that has a focal length of 4.4 cm. The image is 8 cm from the lens.

The height of the image, to the tenths place, is
cm.

Answers

Answer:

-1.6

Explanation:

e2021

The Height of an Image for a Convex Mirror is calculated by using magnification equation

m = h(i) / h(o)  = − d(i) / d(o) ,where  

the magnification index of the mirror, m

the height of the object, h(o)

the height of the image, h(i)

the distance between the object and the mirror, d(o)

the distance between the image and the mirror, d(i)

h(i)/ 2 = -8 / 10

h(i) = -1.6 cm.

What is convex mirror ?

"Convex Mirror is a curved mirror where the reflective surface bulges out towards the light source. This bulging out surface reflect light outwards and are not used to focus light."

What is magnification equation ?

"The formula for magnification is m=h(i)/h(o)=-d(i)/d(o). m is the total magnification; h(i) is the height of the image; h(o) is the height of an object; d(i) is the distance from the lens to the in focus projected image; d(o) is the distance of the object to the lens. The negative sign represents that the image is inverted."

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Is a violin and battery potential energy?

Answers

Explanation:  

In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors. Common types of potential energy include the gravitational potential energy of an object that depends on its mass and its distance from the center of mass of another object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field. The battery is storing the energy but give it something to power and it'll give its energy to the object and a violin strings are like ruber band and if you play the violin it releases a new type of energy sound energy.

What was the name of the first oil well in the UAE?

A.Murban

B.ADNOC

C.Murhabba

D.OLPEC​

Answers

Answer:

B.ADNOC

Explanation:

the Abu Dhabi Petroleum Company

The first commercially viable oil discovery was made at Bab in 1960. In 1962, the company was renamed the Abu Dhabi Petroleum Company. Exports began to flow from the Jebel Dhanna terminal on December 14, 1963.

Answer:

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Which equation should be used to calculate the speed of a wave?

speed = frequency x wavelength
speed = frequency x hertz
speed = period x wavelength
speed = period x hertz

Answers

The equation should be used to calculate the speed of a wave is speed = frequency x wavelength.

What is the formula for wave speed?

The speed of a wave is calculated by the equations: V = λ . f or V = λ/T, and the unit of measurement is m/s. This speed depends on the medium: in gaseous media, the speed is lower than in solid media.

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The equation should be used to calculate the speed of a wave is speed = frequency x wavelength.

What is Speed of wave?

Wave speed is the movement of a progressive wave, which is an energy-moving disturbance that takes the shape of an oscillation and moves from one place to another.

The wavelength and frequency of a wave both affect its speed. A wave's speed is a crucial factor because it enables us to estimate how quickly the wave will disperse in the medium, which is the substance or material that will carry it.

This is the water in the case of ocean waves and the air in the case of sound waves. The kind of wave and the physical properties of the medium in which it is flowing also affect a wave's velocity.

Therefore, The equation should be used to calculate the speed of a wave is speed = frequency x wavelength.

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Romeo traveled by a 900 kg horse from Manitua to Verona accelerating at the rate of 20 km/hr. With what force is Romeo moving at?

Answers

Answer:

Force(Romeo moving) = 5,000 N

Explanation:

Given:

Mass of horse = 900 kg

Acceleration = 20 km/hr

Find:

Force(Romeo moving)

Computation:

Acceleration = 20 km/hr

Acceleration in m/s = 20 / 3.6 = 5.555556 m/s²

Force = m x a

Force(Romeo moving) = 900 x 5.555556

Force(Romeo moving) = 5,000 N

The Washington monument in our nations capital is 169 m high. What would be the speed of the penny as it hit the ground?

Answers

The new law and order to get a to be able to do it again in the future the first time I saw him to be the most important part of our family and I have been a little bit more about this one is the only one I had to go to a new study the first time I saw it as an opportunity for the first time since the last time you saw a lot of the people and the second half of the year for a while and then I was going to be a great way to get a better the first time I saw him to be a part of it was a great way ↕️ the first time I have to say I was in my life and the rest of us to do it again in a few days before I could not have been more than a year ago, I had a lot to do with this new version of the same time as a result of the world and I am not sure what the heck is the best your.

Which is a disadvantage of storing data digitally?
A.The parts of devices that store data are unstable compared to analog storage.
B. Other people can access personal data when a virus is copied with the data.
C. Noise makes digital data unreliable when copied.
D. The quality of copies stays the same as more copies are made.

Answers

Answer:

I thinks it’s b sorry if it didn’t help

Explanation:

One of the disadvantage of storing data digitally  is that,  other people can access personal data when a virus is copied with the data. Hence, security of data cannot be ensured.

What is digital storing?

Nowadays there are many technological ways to store our credentials and essential documents. These data can be stored in virtual space such as in computers phones like electronic gadgets.

Compared to the conventional storage methods or paper format, digital storage is easy and fast easily accessible from anywhere in any format and can be shared. These data cannot damaged as paper document.

However, the digital storing have some drawbacks. Sometimes these data goes insecure and other people can access personal data when a virus is copied with the data.

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The speed of the wooden bar is changed so that the bar hits the water fewer times each second.

What happens to the frequency of the waves produced?

A. Increases
B. Does not change
C. Decreases

Answers

Answer:

c - the frequency of the waves decreases

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