a ball is thrown upwards at an unknown speed. in a time of
.5 second the ball has a height of 6 meters.

what is the initial speed of the ball?

what is the balls speed at a height of 6 meters?

what would be the balls maximum height? (hint: you dont know the time to reach maximum height)

Answer:

 The velocity of a falling object

Explanation:

  The positive X axis is towards right and positive Y axis is towards up, so North direction is positive

  A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.

  Any vector whose magnitude is greater than 1 is never be a negative vector.

  The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.

B. Y,W,X,Z is the answer, Hope it helps

Answer : Y > W > X > Z

Explanation :

The electrostatic force is given by :

[tex]F=k\dfrac{q_1q_2}{d^2}[/tex]

k is the electrostatic constant

q₁ and q₂ are charges

d is the distance between them

We will calculate forces one by one :

[tex]F=k\dfrac{q.q}{d^2}=\dfrac{kq^2}{d^2}[/tex]

[tex]W=k\dfrac{q.2q}{d^2}=\dfrac{2kq^2}{d^2}=2F[/tex]

[tex]X=k\dfrac{q.q}{(2d)^2}=\dfrac{kq^2}{4d^2}=\dfrac{F}{4}[/tex]

[tex]Y=k\dfrac{3q.q}{d^2}=\dfrac{3kq^2}{d^2}=3F[/tex]

[tex]Z=k\dfrac{q.q}{(3d)^2}=\dfrac{kq^2}{9d^2}=\dfrac{F}{9}[/tex]

So, the force from greatest to least will be :

Y > W > X > Z

So, the correct option is (B)

0 kg m/s

Momentum is a force that a thing has when it is moving which means when an object is moving only then it will have a non-zero momentum. If an object is stationary, then its momentum is zero.

Formula to calculate the momentum of a moving object multiply the mass of the object times it's velocity.

Momentum = 0 m/s * 4000kg

Momentum = 0 kg m/s

The symbol for momentum is a small p.

The momentum is defined as the product of mass and the velocity of the body. The momentum of the truck will be zero.

The momentum is defined as the product of mass and the velocity of the body. It is denoted by the letter p. It occurs due to the applied force. Its unit is Kg m/s².

The given data in the problem is;

v is the velocity of truck = not given

m is the mass of truck=4000 Kg

p is the momentum of the truck=?

We can not calculate the momentum of the body at rest. Because the momentum of the body at the rest will be zero.

Hence the momentum of the truck will be zero.

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Answer A

Cars A, B, C, D, and E are moving on tracks from left to right. The lengths of the tracks are the same. Assuming each car started at the beginning of its track, which cars are moving at a constant velocity?

A) A and C  

B) B and D  

C) C and E  

D) D and A

The cars A and C are moving with a constant velocity. The correct option is A.

The diagram attached, is a motion diagram, which marks the positions of an object measured at equal time intervals by means of dots.

If the dots are evenly spaced, it shows that the object is making equal displacements in equal intervals of time, which means that the object has a constant velocity.

In the attached diagram, it can be seen that the dots for the cars A and C are equally spaced, showing that these cars are moving with a constant velocity.

The cars B and D are accelerating, since the space between the dots appears to increase.

The car E is decelerating, as the distance between the dots progressively decreases.

Hence only the cars A and C are moving with constant velocities, with A having a greater velocity than C.

id have to say its thunder

10km/10min is a legitimate speed. So is meters/sec, km/hour (kph), etc.  

Kph is very common for vehicles:  

10 km/10 min (60 min/hr) = 60 kph

E =mc²

   = (5.0-kg)(3 x 10^8 m/s)²

   = (5.0-kg) (9×10^16m²/s²)

   E =4.5×10^17 J

Answer:

Its energy equivalent in Joules is

E = 4.5 × 10^17Joules

Explanation:

The Einstein energy equation is expressed as shown

E = mc² where:

m is the mass of the stone

c is the speed of light

Given:

m = 5.0kg

c = 3 x 10^8 m/s

E = 5×(3 x 10^8)²

E = 5×(9×10^16)

E = 45 × 10^16

E = 4.5 × 10^17Joules

Answer: Option A: The number of trees sampled.

The accuracy can be understood as how close is the measured value to the true value.   The aim is to monitor the population size of the insect pest in a 50 square kilometer. Random trees are selected, and number of eggs and larvae are counted. So, the measured value would be closer to actual value when the number of trees sampled are increased. More the number of trees sampled, less would be the chances of error and the accuracy of the estimate would increase.

Answer:

a.) the number of tress sampled

Given

initial position = Xi= 19.9m

Final position Xf = 5.4m

Average velocity= Va = -0.418m/s

it shows displacement is reverse.

To find  t=?

As   Va = (Xf- Xi) / t

t = (Xf-Xi) / ( Va)

t = ( 5.4-19.9) / (-0.418)

t = (-14.5 ) / (-0.418)   (-ve sign cancel out at numerator and denominator)

t =34.69 s

Ball leaves the table of height 0.60 m

Initial speed of the ball is in horizontal direction which is 2.4 m/s

Now here we can say that time taken by the ball to hit the ground will be given by kinematics equation in vertical direction

[tex]\Delta y = v_y*t + \frac{1}{2}at^2[/tex]

here in y direction we can say

[tex]\Delta y  = 0.60 m[/tex]

[tex]v_y = 0[/tex]

[tex]a = 9.8 m/s^2[/tex] due to gravity

now from above equation we have

[tex]0.60 = 0 + \frac{1}{2}*9.8*t^2[/tex]

[tex]t = 0.35 s[/tex]

Now in the same time the distance that ball move in horizontal direction is given as

[tex]d = v_x* t[/tex]

given that

[tex]v_x = 2.4 m/s[/tex]

[tex]d = 2.4 * 0.35[/tex]

[tex]d = 0.84 m[/tex]

So it will move a total distance of 0.84 m where it will land

The time required for the pool ball to hit the ground is approximately 0.35 seconds and it would cover a horizontal distance of about 0.84 meters from the edge of the table to the landing location.

Your question involves the physics concept of projectile motion. Here, we can use the concepts of horizontal velocity and vertical displacement to calculate the time it would take the pool ball to hit the ground and the horizontal distance it would cover.

Firstly, solving for the fall time, we use the equation of motion: h = 0.5gt², where h is the height, g is the gravity constant (9.8 m/s²), and t is the time. Given the height h = 0.60m, we find t≈0.35s.

Secondly, to find the horizontal distance (the distance between the table's edge and the ball's landing location), we use the formula d = vt, where d is distance, v is horizontal velocity, and t is time. So, d ≈ 2.4m/s * 0.35s = 0.84m.

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Experimenting to determine the fundamental properties of x-rays would be an example of basic research. The experimental primary analysis tries to determine the laws of the events. The primary analysis is expected to know the stuff, its sort, its characteristics and its performance. It examines to get the speculation. To obtain wherewith the stuff performance yet not how to practice these forms for a firm determination.

The research of the characteristics of the particle to explain whatever it is, how it combines with other atoms, how it determines the characteristics of the material are some instances of primary analysis. For example examining to ascertain the basic features of x-rays. Spencer's research on WWII radar technology that drove to the discovery of the microwave furnace.

Edison's research and application of other scientists task is to create the light bulb, and Morrison and Franscioni's research was made to build the Frisbee models of applied research science.  

Basic research is driven by scientific curiosity, with the aim to enhance the understanding of fundamental principles. In the given choices, B) Experimenting to determine the fundamental properties of x-rays is an example of basic research, as it is looking to better understand these electromagnetic waves.

Basic research, also known as fundamental research or pure research, is designed to extend the knowledge base without a specific application in mind. It is driven by curiosity or interest in a scientific question. The aim is to increase understanding of fundamental principles and has the potential to lead to new inventions or technologies. In the given choices, an example of basic research would be B) Experimenting to determine the fundamental properties of x-rays. This study seeks basic understanding about the nature and properties of these electromagnetic waves, which is the very essence of basic research.

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Answer:

3.2

Explanation:

Answer:

18.6 m/s

Explanation:

The frictional force acting on the car is given by:

[tex]F_f = \mu m g=(0.40 )(1200 kg)(9.81 m/s^2)=4709 N[/tex]

But the frictional force also corresponds to the centripetal force that keeps the car in circular motion in the turn:

[tex]F_f = F_c = m \frac{v^2}{r}[/tex]

Where v is the maximum speed the car can achieve remaining in the turn. Substituting r=88.0 m and re-arranging the formula, we can find the value of v:

[tex]v=\sqrt{\frac{Fr}{m}}=\sqrt{\frac{(4709 N)(88.0 m)}{1200 kg}}=18.6 m/s[/tex]

The maximum speed a 1200kg car can round a turn of radius 88m on a flat road given a friction coefficient of 0.40, is around 18.7m/s. This considers the principles of centripetal force and static friction with the assumption of an ideal case scenario.

This problem is a physics scenario that involves centripetal force and static friction. The maximum speed can be calculated using the formula for the centripetal force (F), which in this case is provided by the static friction: F = μN, where μ is the friction coefficient and N is the normal force. In a situation where a car is rounding a turn on a flat road, the normal force N equals to the weight of the car, which is mass (m) times gravity (g). Thus, the equation F = μmg can be used to solve for the centripetal force. The centripetal force equation on the other hand is F = mv² / r, where m is the mass of the car, v is the speed of the car, and r is the radius of the turn. Equating these two equations gives μmg = mv² / r. The mass cancels out resulting to v = sqrt(μgr). Substituting the given values results to maximum speed, v, which is around 18.7 m/s.

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The conversions are as follows

60.°C = 333 Kelvin

212 F = 373 K

200 C = 273 K

27 C = 300 K

This question involves matching temperatures in differing scales: degrees Celsius, Kelvin, and Fahrenheit. However, only the first match (60°C to 333K) can be made with the given options. The remaining options don't correspond correctly.

The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:

The question involves converting and matching different temperature scales, namely degrees Celsius (°C), Kelvin (K), and degrees Fahrenheit (°F). Here are the matched equivalent temperatures:

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SPJ3

The correct answer is D. Transportation Security Administration.

-Willow I know U might not bealive me but I am Correct.

And here Is my Proof. They are an agency that organizes numerous things that are related to transportation security. Among other things, they regulate things such as quality of roads or railroads, or they participate in establishing safety standards for various types of vehicles, from cars to boats and airplanes and trucks, and they do various other things.

Answer:

D.

Explanation:

I believe your answer is Waste Exchange

OH. I just answered this question yesterday too! E: electrons

Why by Mimiwhatsup: When a atom gains or loses an electron, it will attain a net charge and become an ion.

hey again :)

answer: neutrons

why?: neutrons have a negative charge with a mass of - 1 amu. but trust me it's C.

hope this helps! ❤ from peachimin

Answer:

A) 33-newton force pointing upward

Explanation:

Hope this help!

Hey there!

You cannot cut through steel with a plastic knife. As fun as it sounds, it is not a good idea to try, and 99.9% of the time it would not work.

Hope this helps!

It is impossible to cut through steel with a plastic knife because steel is much harder than plastic, and trying to do so could lead to injury.

Steel is a very hard material that requires special tools to cut through effectively due to its high hardness level. Plastic knives are not capable of cutting through steel because they are not hard or sharp enough to overcome the material's resistance. Therefore, It is virtually impossible to cut through steel with a plastic knife due to the significant difference in hardness between the two materials. The hardness of a material dictates how resistant it is to being scratched or cut. For example, steel used in a pocketknife blade has a hardness value of around 5.5, which is considered sufficient to separate between hard and soft minerals. On the other hand, plastics used for items such as plastic cutting boards or plastic knives are much softer.

Answer:yess the correct answer is A

Explanation:

fast moving and long intervals , light but quick movements, usually with light weight

Cardiovascular activities are characterized by significant cardiac output, compliance, volume of the blood, and viscosity of the blood. These activities affect how much blood the heart pumps, and can contribute to overall heart health.

Cardiovascular activities are characterized by four primary attributes. First, they involve a significant Cardiac Output, which is the volume of blood the heart pumps per minute. Second, they incorporate varying levels of Compliance, referring to the ability of a vessel to stretch and increase its volume with increasing transmural pressure. The third characteristic is the Volume of the Blood in the body, meaning that cardiovascular activities affect how much blood the heart pumps with each beat. The final characteristic is the Viscosity of the Blood, which refers to the thickness and stickiness of the blood, a factor that can impact blood flow and pressure. Participating in regular cardiovascular activities can help maintain and improve these factors, contributing to overall heart health.

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C

the unit of electric current is the ampere, often shortened to amp

For free fall motion the displacement can be found by graphically as well as by kinematics equation

Here acceleration of object is constant as it fall due to gravity so we can use

[tex]d = v_i * t + \frac{1}{2}at^2[/tex]

here if body starts with zero initial speed then we can say

[tex]d = 0 + \frac{1}{2}*9.8*t^2[/tex]

here we need to find the displacement from t = 0 to t = 6s

so we can say

[tex]d = \frac{1}{2}*9.8*6^2[/tex]

[tex]d = 176.4 m[/tex]

so the displacement will be 176.4 m

in order to find the displacement from the graph of velocity and time we need to find the area under the graph for given time interval that will also give us same displacement for given period of time.

Answer:

+360m

Explanation:

You are missing some parts of the question but I have found them else where. The graph will be shown below.

The formula for this is [ d = vt ] where v = velocity and t = time.

On the graph, we can see that the acceleration is constant. The line goes to a maximum velocity of 60m/s and a maximum time of 6 seconds.

Find the displacement with what we are given.

d = 60 * 6

d = 360m

Since we are going forward, we are going to add a "+" sign in front.

Best of Luck!

B) 7.7 x 10^-5 c, hope it helps

Answer:

Choice B is the answer

Explanation:

Answer: (1) Putrefaction

              (2) Biodegradable

               (3) Refuse.

Putrefaction refers to decomposition of organic substances usually dead plants' and animals' bodies by microorganisms.

Therefore, it matches with first definition that states the decay of organic matter caused by microorganisms.

Biodegradable substances are decomposed by living organisms such as microorganisms.

Therefore, it matches with the second definition that states susceptible to decomposition by living organisms.

Refuse refers to something which is no longer useful.

Therefore, it matches with the third definition of waste.

Final answer:

The vocabulary words 'putrefaction', 'biodegradable', and 'refuse' are matched with their definitions related to decomposition and waste, with putrefaction being the decay of organic matter by microorganisms, biodegradable indicating that a substance can decompose by living organisms, and refuse meaning waste.

Explanation:

When matching the vocabulary words with their definitions, we relate terms to their respective meanings concerning the breakdown of organic material and waste management. Here are the correct matches:

Decomposers, like bacteria and fungi, are vital because they break down dead organisms and wastes, transforming complex organic materials into simpler inorganic nutrients that can be reused by producers in the ecosystem. If a substance can be broken down by decomposers, it is termed biodegradable. Organic matter undergoes putrefaction as a result of microbial action, highlighting the role of decomposers in the natural recycling process.

The charge will most likely leave the electric field near C) Y

Answer:

Option (C)

Explanation:

The direction of electric field is upwards

The charge is negative is nature, so the force on the charge particle is in the opposite direction of electric field that means the force on the charged particle is downward. The relation between the force and the electric field is given by

F =  -q x E

So, the charged particle experience a force in the downward direction and then leaves the electric filed near point Y.

When object falls freely we can say

its initial speed will be ZERO

and its acceleration due to gravity must be

[tex]a = g = 9.8 m/s^2[/tex]

Now we need to find the distance of free fall in 3 s of time

So here we will use kinematics

[tex]y = v* t + \frac{1}{2} at^2[/tex]

now we will plug in all values in it

[tex]y = 0 + \frac{1}{2}* 9.8 * 3^2[/tex]

[tex]y = 44.1 m[/tex]

So it will fall by total distance of 44.1 m

Answer:

The brick will cover a distance of [tex]44.1\;\rm{m[/tex].

Explanation:

Given: A brick starting from rest fall freely in 3 seconds.

As mentioned in question,

When an object falls freely then its initial speed will be [tex](u)=0\; \rm{m/s[/tex].

Acceleration due to gravity is [tex]a=g=9.8\;\rm{m/s^{-2[/tex].

Time [tex](t)=3\; \rm{seconds[/tex]

Using the laws of motion: [tex]s=ut+\frac{1}{2}at^2[/tex]

Substiuting all the values we get:

[tex]s=0\times3+\frac{1}{2}\times9.8\times3^2\\s=0.5\times9.8\times 9\\s=44.1\;\rm{m[/tex]

Therefore, the brick will cover a distance of [tex]44.1\;\rm{m[/tex].

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If time (t), acceleration(a) and  initial velocity (Vi)  is given distance can be find by

S = (Vi)t + (1/2) at²

If both velocities initial velocity an final velocity is given then formula will be

2aS = (Vf)²- (Vi²)

Where S is the distance.