Rosa uses a spring scale to pull a cart along a track for 2 meters. The spring scale shows the force exerted on the cart while being pulled. She uses metal plates to vary the mass of the cart, and motion sensors to calculate the average speed and acceleration of the cart.

She records the results in a table.

Rosa claims that the force needed to accelerate an object is proportional to the mass of the object. Which statement BEST supports or disproves Rosa’s claim using the data from the table?

A- Rosa’s claim is false. When the mass of the cart increases by 1.0 kg, the force on the cart increases by more than 1.0 kilogram.

B- Rosa’s claim is false. Even though the mass and the force increase in each trial, the acceleration of the object remains the same.

C-Rosa’s claim is true. The acceleration for each trial is the same. Doubling the mass of the cart causes the force to double in order to maintain the same rate of acceleration.

D-Rosa’s claim is true. Each time the mass increases by 1.0 or 2.0 kilograms, the force increases by 1.0 or 2.0 newtons respectively. This causes the rate of acceleration to remain constant.

Answer:

Im pretty sure its 7.5

Explanation:

your initial ( starting) velocity was 75. Your final velocity was 0. 75 / 0 = 0 m/s.

BUT you are calculating your acceleration, so it would be 75 - 0 divided by 10 = 7.5

Answer:4.38 X 10^10 diapers.

Explanation:

[3 diapers / 1day] X [365 day / year] X 1 year X 40million (rough guess of 1-2.5 year olds)  = 4.38 X 10^10 diapers.

if we assume that between birth and 2.5 y of age a child uses 3 diapers per day then the total number of disposable diapers used per year in us would be 1095 diapers

Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.

as given in the problem if we assume that between birth and 2.5 y of age a child uses 3 diapers per day

The number of diapers used in a day = 3

as there are 365 days in a year

The total number of diapers used in a year = 3×365

The total number of diapers used in a year = 1095 diapers

Thus, The total number of disposable diapers used in the United States each year would be 1095 diapers if we assume that a child uses 3 diapers per day between birth and 2.5 years of age.

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Answer:

Yes it is

Explanation:

the sum moles at the left side equals the sum of moles at the right side

jacob first stack is 1

Answer:

help

Explanation:

me

Answer:

Explanation:

let's use kinematics to solve for max height above the hand.

At the top of its arc, the sword has zero vertical velocity.

v² = u² + 2as

s = (v² - u²)/2a

s = (0² - 5.0²) / (2(-9.8))

s = 1.2755...m

call it 1.3 m

to this we must adjust for the height of the hand at release which is

18.0 + 1.0 = 19.0 m above ground

19.0 + 1.3 = 20.3 m above ground

Answer:

Always wear a lab coat and safety goggles when performing an experiment

✓ Behavior in the lab needs to be purposeful. Exercise caution when using the hot plate, as it can cause burns.

X Ice used in this lab can melt quickly. Be sure to insulate your containers.

✓ Label your glassware and paper cups clearly and appropriately. Many chemicals appear to be the same.

✓ Check glassware, such as beakers and test tubes, for cracks and chips prior to use.

X A fume hood should be used to collect any potentially harmful vapors.

✓ Wear the right gear, such as chemically resistant gloves and oven mitts, when performing the experiment.

A, C, D, F

genotype is the complete set of genes in an living organism

Answer:

The release of energy from fuels is used to make other forms of energy. When gasoline burns in a car engine, some of the chemical energy in the gasoline is converted into heat. The heat is converted into mechanical energy. The mechanical energy moves the car.

Answer:

[tex]\huge\boxed{\sf Average\ speed = 16\ km/hr}[/tex]

Explanation:

Given:

Distance = S = 8 km

Time = t = 30 minutes = 30/60 = 0.5 hours

Required:

Average Speed = ?

Formula:

Average speed = total distance covered / total time taken

Solution:

Average Speed = 8 / 0.5

Average speed = 16 km/hr

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!

Harry cycles 8 kilometers in 30 minutes and the Harry's average speed obtained is 6 kilometers per hour.

Given:

Total distance covered by the Harry= 8 kilometers

Total time is taken by the Harry= 30 minutes

Convert total time to hours, the total time taken is obtained as:

Total time (hours) = 30 minutes / 60 minutes/hour = 0.5 hours

The average speed of the Harry is given by:

Average speed = Total distance / Total time

Average speed = 8 km / 0.5 hours

Average speed = 16 km/h

Therefore, Harry's average speed is 16 kilometers per hour when Harry cycles 8 kilometers in 30 minutes.

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The defined friction force allows you to find which is the correct result for what type of wax you should use:

        B. One where the coefficient of static friction is larger.  

The friction force is a macroscopic force that opposes the relative movement of bodies, it is the sum of many interactions at the microscope level.

In general for solid bodies the expression of the out of friction is

             [tex]fr = \mu N[/tex]

Where fr is the friction force, μ the friction coefficient and N the normal.

The friction coefficient can be of two types:

In general, the dynamic coefficient is less than the static one.

In this case, as the temperature increases, the friction coefficient  decreases, so the skier begins to slide downwards. To prevent this sliding, he must use a wax with a higher friction coefficient.

If you only want to stand on the hill, a wax with a static coefficient must be used, while standing if you want to advance on the hill you must use a wax with a dynamic coefficient since there is a relative movement between the skier and the hill.

Let's examine the different alternatives:

A. False. The friction coefficient must be higher, so that there is more friction force.

B. True. The friction increases and can be stopped on the hill and move up the hill.

C. False In this case, you can go up the hill, but if you stop, you can go back.

D. False. The coefficient must be higher, to increase friction.

Consequently we see that the only type of wax that will allow you to stand or advance on the hill is

       B.  A wax with a higher statutory coefficient.

In conclusion, using the defined friction force we can find the correct result for what type of wax to use is:

         B. One where the coefficient of static friction is larger.

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Answer:

One where the coefficient of static friction is larger

Explanation:

Answer:

increasing the temperature of the object

Answer:

A

Explanation:

water released then sunlight splits it into oxygen and hydrogen ions

Cho e xin câu trả lời được không ạ?

Answer:

(i) C=3Co

(ii) V=Vo/3

(iii) Decrease

Explanation:

(i) capacitance increase K times.

(ii) As charge remain constant so by using Q=CV

you will get potential decrease by K time.

(iii) Decrease due to induced electric field inside

dielectric material..

E=Eo-Eind

Explanation:

heyaaa hope it helps ☺️✌️

Answer:

Explanation:

KE = ½mv² = ½(6.8)8² = 217.6 J

round as appropriate because that result is way too much precision for the inputs provided. Arguably should be 200 J based on the single significant digit of the velocity.

Answer:

How Do Mass and Distance Affect the Force of Gravity Between Two Objects?  

The force of gravity between two objects is determined by the mass of each object and the distance between their centers. Objects with a greater amount of mass will exert a greater degree of gravitational pull, but as the distance between two objects increases, the gravitational force between them lessens.

Explanation:

An example of the significance of distance in Newton's law is how a person's weight decreases when they are further away from the center of the Earth, such as in an orbiting space station. The gravitational force, experienced as weight, is decreased, even through the person's mass and that of the Earth remain the same.

Answer:

Approximately [tex]9.9\; \rm m\cdot s^{-1}[/tex], assuming that this object started from rest, [tex]g = 9.81\; \rm m \cdot s^{-2}[/tex], and that air resistance on this object is negligible.

Explanation:

If the effect of drag on this object is negligible, the acceleration of this object would be constantly equal to [tex]g[/tex], the gravitational field strength ([tex]g \approx 9.81\; \rm m\cdot s^{-2}[/tex] near the surface of the earth.)

Since acceleration is constant, it would be possible to find the final velocity of this object using SUVAT equations.

The following SUVAT equation would apply:

[tex]v^{2} - u^{2} = 2\, a\, x[/tex].

Rearrange to find an expression for [tex]v[/tex]:

[tex]\begin{aligned}v^{2} &= 2\, a\, x + u^{2}\end{aligned}[/tex].

[tex]\begin{aligned}v &= \sqrt{2\, a\, x + u^{2}}\end{aligned}[/tex].

Substitute in the values [tex]u = 0\; \rm m\cdot s^{-1}[/tex], [tex]a = 9.81\; \rm m\cdot s^{-2}[/tex], and [tex]x = 5\; \rm m[/tex]. Evaluate the expression to find the value of [tex]v[/tex]:

[tex]\begin{aligned}v &= \sqrt{2\, a\, x + u^{2}} \\ &= \sqrt{2 \times 9.81\; \rm m\cdot s^{-2} \times 5\; \rm m} \\ &\approx 9.9\; \rm m\cdot s^{-1}\end{aligned}[/tex].

Therefore, under these assumptions, the velocity of this object would be approximately [tex]9.9\; \rm m\cdot s^{-1}[/tex] right before it hits the ground.

Explanation:

A parasitic plant with yellow, slender and branched stem is called Cuscuta (Amarbel).

hope this helps you.

Answer:

Write two important of physical state

Answer:

To convert from denary to binary, start by subtracting the biggest place value you can from the denary number, then place a 1 in that place value column. Next, subtract the second biggest place value you can, and place a 1 in the column. Repeat this process until you reach zero.

Answer:

The factors that affect an object's gravitational potential energy are its height relative to some reference point, its mass, and the strength of the gravitational field it is in.

Answer:

so2 is Sulfur dioxide.

Answer:

10

Explanation:

1*2+2+1+5=10

1x2+2+1+5=10

Answer:

Explanation:

μ = 0.05 is hardly a "rough surface", More like very slick ice. But OK

Forces acting parallel to the ramp with UP RAMP being positive direction.

                                  F = ma

Tension minus weight minus friction will equal mass acceleration

T - mgsinθ - μmgcosθ = ma

                                  T = m(a + g(sinθ + μcosθ))

                                  T = 200(1 + 9.8(sin25 + 0.05cos25))

                                  T = 1,117.14995

Which is closest to answer A.

Understand that answer precision to 3 or 4 significant digits as exampled by our solution options CANNOT be justified by input numbers with only a single significant digit as in this question.

In fact, we cannot get the 1136 N result unless we also use gravity to a single significant digit of 10 m/s²

Answer:

D. MECHANICAL ENERGY

SANA MAKA TULONG

Answer:

the answer is D

Explanation:

because I know it is D

S.A of sphere = 4πr²

r = 2m

S.A = 4π *4

S.A = 50.26m²

The surface area is 50.26m²

The surface area exists as the amount of space surrounding the outside of a three-dimensional shape.

The surface area of a solid object exists as a measure of the total area that the surface of the object settles.

The surface area of a figure (in square units) exists the number of unit squares it brings to cover the entire surface without gaps or overlaps. If a three-dimensional figure includes flat sides, the sides are named faces. The surface area exists as the total of the areas of the faces.

A radius of a circle or sphere exists in any of the line segments from its center to its perimeter, and in additional modern usage, it exists also its length.

S.A of sphere = 4πr²

r = 2m

S.A = [tex]4\pi *4[/tex]

S.A = 50.26m²

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Answer:

sun, earth, capitol building, human, atom

Explanation:

Gravity is directly proportional to the size of an object. Therefore, the object with the most mass will have the greatest force of gravity. We know this from the equation. [tex]F = G\frac{m_1m_2}{r^2}[/tex]