3. You are walking at a 1m/s velocity and carrying a tray with a ball at rest on the tray. You come to a brief stop and the ball rolls off the tray. What causes the ball to roll off the tray?
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If the time is doubled to reach the same final velocity, then the acceleration will be half the acceleration before.

The rate of change of an object's velocity with respect to time is defined as acceleration. Vector quantities are accelerations.

Let's assume the final and the initial velocity of the object is v and u, respectively. Also, the time it takes is represented by t. Therefore, the acceleration can be written as,

a₁ = (v-u)/t

Now, if the time is doubled then the acceleration can be written as,

a₂ = (v-u)/2t

    = (1/2) × [(v-u)/t]

    = 0.5 × a₁

a₂ = 0.5a₁

Hence, If the time is doubled to reach the same final velocity, then the acceleration will be half the acceleration before.

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Answer:

6.03 m/s

Explanation:

Average speed = total distance traveled/total time taken

7 = 450 + 100/total time

total time = 550/7 = 78.57 s

Speed of camel on the bicycle = distance/time

25 = 100/time

time = 100/25 = 4 s

Total time = 78.57 s

Time spent riding bicycle = 4 s

Time spent walking = total time - time spent riding bicycle

                                  = 78.57 - 4 = 74.57 s

Speed of walking = distance walked/time spent walking

                             = 450/74.57

                                 = 6.03 m/s

Answer: In statistics, a perfect positive correlation is represented by the ... variables in question move together by the exact same percentage ... Positive correlation is a relationship between two variables in which both variables move in ... other variable decreases, or one variable increases while the other increases.

Explanation:

make me a brainlist and like and rate

Percent error is a mathematical way of showing accuracy, dependent variable is what is measured and affected during the experiment, independent variable is what is changed by the researcher.

Percent error is the difference between the estimated value and the actual value in comparison to the actual value of the experiment and is expressed as a percentage value. In other words, the percent error is the relative error multiplied by the number 100.

Direct relationship is a relationship between any two variables whereby both the variables increase or decrease together. Directly affect each other.

Inverse relationship is a relationship between any two variables whereby one variable increases and the other variable decreases. The variables affect each other but inversely.

An independent variable is the variable which is changed by the researcher through the experiment.

A dependent variable is the variable which is measured and affected during the experiment and it often described as being dependent on the independent variable of the experiment.

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Answer:

Explanation:

No external force is acting on uranium nucleus so we can apply law of conservation of momentum . If M and m be the mass of bigger and smaller fragments respectively and V and  v be their velocity after fission , Total momentum after fission  = total momentum before fission

MV - mv = 0 , since the nucleus was at rest , its momentum before fission is zero . negative sign of mv is taken because smaller fragment  will move in opposite direction to that of bigger fragment .

MV = mv

M / m = v / V

M > m

Hence,

v > V

So velocity of smaller fragment will be higher .

Answer:

a) mass=density x volume= 2400 x 0,20=480 Kg

b) weight= 480 x 9,81 = 4708,8 N

(5 L/m)x(1,440 m/da)x(365 da/yr)x(20yr)

That's 52,560,000 Liters, or 52,560 m^3.

Answer:

2.2 m/s

Explanation:

use the formula to find meters per second

Explanation:

We know that :

[tex]P = \frac{V^{2} }{R} [/tex]

Resistance of Bulb :

[tex]R = \frac{ V^{2} }{P } = \frac{ {(240)}^{2} }{280} = 205.71 \: ohms[/tex]

As per Ohms laws :

Current when (V = 200)

[tex]i \: = \frac{ V}{ R} = \frac{200}{205.71} = 0.97 \: A[/tex]

Answer:

3

Explanation:

just did it

Answer:

The correct option is the second option with horizontal bars at a =  6, a = -1, and a = 4 m/s²

Please find attached the table of values and a graph representing the correct option

Explanation:

The given data can be presented as follows;

Time (s),                 Velocity (m/s),               Acceleration (m/s²)

0,                                    -1,                                        6

0.5,                                   2,                                       6

1,                                       5,                                        6

0,                                      5,                                       -1

0.5,                                  4.5,                                     -1    

1,                                       4,                                       -1

1.5,                                    3.5,                                     -1

2,                                     3,                                        -1

2.5,                                 2.5,                                      -1

3,                                     2,                                         -1

0,                                     2,                                          4

0.5,                                   4,                                         4

1,                                        6,                                        4

1.5,                                    8,                                         4  

2,                                     10,                                         4

From the data, and the graph the acceleration for the period from the time t = 0 to t = 1 is 6 m/s²

From t = 1 to t = 4, the acceleration is constant and equal to -1

From t = 4 to t = 6 the acceleration is also constant and equal to 4

Answer:

It will take the person 10 seconds to run a 30-meter city block.

Explanation:

To solve this problem, we must remember the formula for velocity:

velocity = displacement/time

If we plug in the values that we are given, we get:

3 m/s = 30 m/time

We can see from the above equation that our answer should be in seconds, so we can get rid of the units to simplify the equation slightly.

3 = 30/t

Next, we can multiply both sides by t:

3t = 30

Then, we should divide both sides of the equation by 3 to get the variable t alone on the left side of the equation.

t = 10

Therefore, the correct answer is 10 s.

Answer:

Scientific Definition of Mass. Mass is the quantity of inertia (resistance to acceleration) possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion (force equals mass times acceleration). In other words, the more mass an object has, the more force it takes to get it moving.

Explanation:

Answer:

i believe its c

Explanation:

I took the test

The one  best illustrates a study done in psychology is a study that shows how Katrina’s stress levels contribute to her obsessive exercise habits. The correct option is C.

Psychology is the scientific study of human mind and his behavior on various situations. It includes the study of conscious and unconscious phenomena, feelings and emotions attached to some person or a habit.

The psychology deals with the stress levels which make up the wrong habits. This may be caused due to overthinking, one starts to push himself more and more. He wants to stress out to manage this stress and does the exercise obsessively.

So, the study how Katrina’s stress levels contribute to her obsessive exercise habits is an example of psychology study.

Thus, the correct option is C.

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Answer:

Sonar

Explanation:

Sonar is a technique that involves the use of sounds in viewing substances in a water medium to aid movement or communication. It makes use of the advantage of sound waves traveling faster and farther in water when compared to other types of waves such as light waves.

During World War II, the military employed the use of SONAR in imaging the seafloor by sending pulses of sound waves down through the water and measuring the time it took for the sound to bounce off the seafloor and return to the receiver.

Answer:

Explanation:

The kinetic energy of a body can be found by using the formula

where

m is the mass

v is the velocity

From the question

mass = 5 kg

velocity = 4 m/s

Substitute the values into the above formula and solve

We have

We have the final answer as

Hope this helps you

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

We know that, Newton's second law of motion states that Force is the product of mass and Accleration which is actually derived from the original statement, Rate of change of momentum is directly proportional to Force applied and acts in the same direction of force.

According to this,

[tex] \large{ \cdot{ \boxed{ \rm{f = m \times a}}}}[/tex]

Where,

So, By using formula,

➝ F = m × a

➝ 180 N = 15 kg × a

➝ 15a = 180

➝ a = 180/15 = 12 m/s²

❍ Accleration of the body = 12 m/s²

Hence, solved !!

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[tex]\tt {\pink{Given}}\begin{cases} \sf{\green{Force=180 \: newtons}}\\ \sf{\blue{Mass=15 \: kg}}\\ \sf{\orange{Acceleration= \: ?}}\end{cases}[/tex]

Answer:

[tex]\qquad \: \tiny\dag\:\underline{\tt By \: applying \: Newtons \: second \: law \: of \: motion \: we \: get : } \\ \\ [/tex]

[tex]:\implies\sf F = ma \\ \\ [/tex]

[tex]\tt {\pink{Where}}\begin{cases} \sf{\green{F=Force}}\\ \sf{\blue{m=Mass}}\\ \sf{\orange{a=Acceleration}}\end{cases}[/tex]

[tex]\qquad\tiny\dag\:\underline{\tt Now,substituting\: the \: given \: values \: in \: above \: Formula \: we \: get :} \\ \\ [/tex]

[tex]:\implies\sf 180 = 15 \times Acceleration \\ \\ \\ [/tex]

[tex]:\implies\sf Acceleration = \dfrac{180}{15} \\ \\ \\ [/tex]

[tex]:\implies \underline{ \boxed{\textsf{ \textbf{ Acceleration = 12 m/s$^2$ }}}} \\ \\ \\ [/tex]

[tex]\therefore\underline{\textsf{ Acceleration produced by the box is \textbf{12 m/s$^2$}}}. \\ [/tex]

Answer:

[tex] \boxed{\sf Focal \ length = 10 \ cm} [/tex]

Given:

Radius of curvature (R) of a spherical mirror = 20

To Find:

Focal length (f)

Explanation:

Formula:

[tex] \boxed{ \bold{\sf Focal \ length \ (f) = \frac{Radius \ of \ curvature \ (R)}{2}}}[/tex]

Substituting value of R in the equation:

[tex] \sf \implies f = \frac{20}{2} [/tex]

[tex] \sf \implies f = \frac{ \cancel{2} \times 10}{ \cancel{2}} [/tex]

[tex] \sf \implies f = 10 \: cm[/tex]

Focal length = 10 cm.

Solution :

Given radius of curvature = 20 cm.

Formula :

Focal length = Radius of curvature/2

→ Focal length = 20/2

→ Focal length = 10 cm.

Answer : 10 cm.

Answer:

[See Below]

Explanation:

Your average speed would be 204.35 mph.

Answer:

Well it really depends because he found out about a lot of things in a lot of scientific fields actually. He is known for contributing Pascal's triangle and probability theory. He also invented an early digital calculator and a roulette machine. In the field of physics, Blaise contributed to the study of atmospheric pressure by discovering that vacuums are real and exist in the real world.

Answer:

Well it really depends because he found out about a lot of things in a lot of scientific fields actually. He is known for contributing Pascal's triangle and probability theory. He also invented an early digital calculator and a roulette machine. In the field of physics, Blaise contributed to the study of atmospheric pressure by discovering that vacuums are real and exist in the real world.

Explanation:

Answer:

Let's define the point A as our zero in the x-axis.

As the phone drops, it keeps the horizontal velocity that it had before, so the horizontal velocity is:

Vx = 3 mi/h.

Now, the only force acting on the phone is the gravitational force that acts in the vertical axis, then we have:

Ay = -g

where g = 9.8 m/s^2

It is dropped, so we do not have a vertical initial velocity, then for the vertical velocity we should integrate over time:

Vy = -g*t

And for the position again, we integrate over time, but now we have an initial position H, that is the height at which the phone is dropped.

Py = -(1/2)*g*t^2 + H

And the horizontal position can be found by integrating over time the horizontal velocity.

Px = (3mi/h)*t

This will be the two equations that describe the motion of the phone, and we can not solve it further because we do not know the initial height of the phone.

But in general, we have a linear equation in the horizontal axis and a quadratic equation with a negative leading coefficient in the vertical axis.

Position(t) = ( (3mi/h)*t,  -(1/2)*g*t^2 + H)

Answer:

yes he is running at 3 mph

Explanation:

because im the teacher

Answer: It goes inside filling most of it .

Explanation: This happens because the bottle is empty and the bucket is full of water.

Answer:

Average Acceleration = 0 m/s²

Explanation:

The average acceleration between t = 2 sec to t = 8 sec is given as follows:

Average Acceleration = (Final Velocity - Initial Velocity)/Total Time

From Graph,

Total Time = 8 sec - 2 sec = 6 sec

At t = 2 sec

Initial Velocity = 3 m/2 s = 1.5 m/s

At t = 8 sec

Final velocity = 12 m/8 s = 1.5 m/s

Therefore,

Average Acceleration = (1.5 m/s - 1.5 m/s)/ 6 s

Average Acceleration = 0 m/s²

a) Live wire

b) It has gained extra electrons.

c) Part of circuit can be turned off while other parts remain on.

d) [tex] R=\frac{V}{I}=60 \Omega[/tex]

Answer:

1.Power

2.warming

3.preserve

4.less

5.Paper

6.Fossil

7.ride cycle

8.Non renewable energy sources

Please check it once and reply

Answer:

Explanation:

In this problem we are expected to find the weight of the plastic tank and the weight of the equal volume of water

Given that

density of water = 1000 kg/m^3

volume of plastic tank is same as the volume of water= 0.18 m^3

we need to solve for the mass of the water

we know that density is = mass/volume

1000= mass/0.18

mass= 1000*0.18

mass= 180 kg

the total mass of the combined system is

4+180= 184 kg

the weight = mg (assuming g= 9.81 m/s^2)

weight = 184*9.81

weight= 1805.04 N

Answer: Autotrophs

Explanation: Autotrophs make their own food from nature. They do not depend on other creatures for food

B) Cooler materials are highly dense, causing them to sink to the outer core.

Answer:

the answer is B i did the test

Answer:

The density of the substance precisely is 2142.8571428571, but you could always round the answer to something else.

Explanation:

The formula for finding density is ρ (density) equals mass over volume.

75 grams over 35 mL = 2.1428571428571 gram/mL = 2142.8571428571 kilogram/cubic meter.

Hope this helped. :)

Answer:

-5/2

Explanation:

8-6/4-12+3^2

8-6/4-12+9

2/4-12+9

LCM =4

(2-48+36)/4

(-46+36)/4

-10/4

-5/2