write a paragraph describing your evaluation of the experiment and describing how to modify an experiment. plssss Science 8 B - Unit 5, Lesson 9: Non-Contact Forces Portfolio 3

Answer:

7 hours.

Explanation:

This is because you are traveling 5 kilometers per hour so 5 multiplied by 7= 35.

Answer:

B: C + O2 = CO2

Explanation:

In Chemistry,a synthesis reaction is one that occurs when two or more reactants combine in such a manner that they form a single product.

Looking at the options, the only one where 2 reactants combine to form a single product is option C where Carbon reacts with Oxygen to form carbon (IV) oxide.

Answer:

Pascal (Pa)

Explanation:

the si for pressure is the pascal pa equal to one newton per sqaure meter (N/m^2, or kgxm-^1xs-^2)

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Answer:

\(K.E=29.403125J\)

Explanation:

From the question we are told that

Mass \(M=100\)

Height \(50-20=30m\)

Generally the equation for velocity before impact is is is mathematically given by

\(v=\sqrt{2gh}\)

\(v=\sqrt{2*9.8*30}\)

\(v=24.25\)

Generally the equation for Kinetic Energy is is mathematically given by

\(K.E=\frac{1}{2}mv^2\)

\(K.E=\frac{1}{2}*100*(24.25)^2\\\)

\(K.E=29403.125J\)

\(K.E=29.403125J\)

The man will cover the horizontal distance with the velocity of efflux. And the required kinetic energy associated with the motion of man is

29.40 J.

When an object is in motion along a linear or curvilinear path, having some magnitude of velocity, then the energy associated with the object in that state is known as kinetic energy.

Given data -

The mass of the man is, m = 100 kg.

The height of the cliff is, H = 50 m.

The distance from the water surface is, h' = 20 m.

We can use the concept of efflux. When water comes out to some horizontal distance, then the velocity associated with the flow is known as the velocity of efflux.

Then mathematical expression for the velocity of efflux is,

\(v=\sqrt{2g(H-h')}\)

Here, g is the gravitational acceleration.

Solving as,

\(v=\sqrt{2 \times 9.8(50-20)}\\\\v = 24.25 \;\rm m/s\)

Now, the expression for the kinetic energy of man is given as,

\(KE = \dfrac{1}{2}mv^{2}\)

Solving as,

\(KE = \dfrac{1}{2} \times 100 \times 24.25^{2}\\\\KE = 29.40 \;\rm J\)

Thus, we can conclude that the kinetic energy of man diving out at 20 m from water is 29.40 J.

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Answer:

none

Explanation:

stranger mid mid mid mid

Answer:

My favorite stranger things character is Eleven also known as Millie Bobby Brown

Explanation:

I hope this helps and have a good day!

The net force exerted on a car traveling in a circular path at constant speed is A) directed toward the center of the curve. So, correct option is A.

The force which is acted on the car and responsible to move a car towards the center of the curve is called as centripetal force. A centripetal force is a force that causes a body to follow a bended way. Its course is dependably symmetrical to the movement of the body and towards the decent place of the quick focus of shape of the way. Isaac Newton portrayed it as "a force by which bodies are drawn or prompted, or in any capacity tend, towards a point regarding a center". In Newtonian mechanics, gravity gives the centripetal force causing galactic circles.

Hence, correct option is A.

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This soccer technology fair challenge serves to acquaint college students with simple records of how the quantity of air in a football ball can have an effect on the distance it travels while kicked with the regular force.

Velocity / (vɪˈlɒsɪtɪ) / noun plural ties the pace of movement, motion, or operation rapidity; swiftness. physics is a degree of the charge of the movement of a frame expressed as the price of alternate of its role in a specific route with time.

Now that the variety of projectile is given by R = u 2 sin ⁡ 2 θ g, while could be most for a given preliminary speed velocity is the directional velocity of an item in movement as a demonstration of its fee of change in position as observed from a particular body of reference and as measured by using a specific trendy of time.

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Answer:

he will not be drowned

Explanation:

Question says , the height of the student = 4 feet,

Depth of the pool( in feet ) be x ( say ) which is less than  4 feet,

Clearly, the depth of the pool < height of the student,

This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.

Answer:

Explanation:

The density of gold is 19.3 g/cm³. Thus, you can determine the density of the unknown cube by doing the following. Get a measuring cylinder (marked in cm³) that contains a certain volume of water (preferably above average but not close to been filled up). Get a weighing balance (that can read in grams) also.

Measure the mass of the unknown stone (using the weighing balance) and record. Take the initial volume of the water in the measuring cylinder and record (in cm³) and then drop the unknown stone inside the measuring cylinder gently (avoid splashes). Record the final volume of the cylinder after the unknown stone was dropped.

Then calculate the density of the stone by using the formula; mass ÷ change in volume

The change in volume can be determined by; Final volume - initial volume

If the answer obtained from the calculation (of the density of the stone) is not around 19.3 g/cm³ (say 19.3 ± 0.2), then the stone is not gold but if it is around 19.3 g/cm³, then the stone is gold.

Answer:

50.3N

Explanation:

Work done = force x distance

422J. = force x 8.39m

÷8.39 both side to get force

Force is 50.3N to 1 d.p.

Check:

50.3 x 8.39=422.017J

Same as 422J to 1 d.p

Answer:

heartbroken

Explanation:

just failed my test cause i typed my answers in Caps. Acellus a scam . leave a heart if you feel for me :(  (Answers above were right btw)

Answer:

B Newton's second law

Explanation:

An empty grocery cart is easier to move because there is less mass in an empty cart compared to a full cart. Newton's second law state that an object's acceleration depends on the mass of the object and the force applied.

The concept of the pendulum is used in pendulum clocks to keep time. The pendulum swings back and forth in a continuous motion at a fixed rate that is determined by the length of the pendulum and the force of gravity.

This motion is used to regulate the movement of the clock's gears, which control the hands on the clock face.The mechanism of a pendulum clock is such that when the pendulum swings in one direction, it pushes a toothed wheel or gear, which in turn moves the other gears, causing the clock's hands to move forward.

When the pendulum swings back in the opposite direction, it again pushes the gear, causing the hands to move further forward. This cycle continues, with each swing of the pendulum causing the hands to move forward by a set amount. The length of the pendulum determines the rate at which the hands move forward, with longer pendulums causing the hands to move more slowly.

In a pendulum clock, the pendulum swings back and forth in a continuous motion at a fixed rate that is determined by the length of the pendulum and the force of gravity. This motion is used to regulate the movement of the clock's gears, which control the hands on the clock face. The pendulum clock is an improvement on the original verge escapement clocks, which were prone to errors due to the uneven force of the mainspring.The pendulum is a simple yet effective device that can keep accurate time. Its motion is governed by the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred from one form to another.

When the pendulum is pulled to one side and released, it swings back and forth, converting potential energy into kinetic energy and back again. The period of the pendulum, or the time it takes to complete one full swing, is determined by the length of the pendulum and the force of gravity. By adjusting the length of the pendulum, the rate at which it swings can be altered, allowing it to keep accurate time.

To keep the pendulum clock running accurately, it needs to be adjusted periodically. This is done by altering the length of the pendulum, either by moving a weight up or down along the pendulum rod or by turning a screw at the bottom of the pendulum bob. This alters the period of the pendulum, which in turn changes the rate at which the clock runs.

The pendulum clock is a testament to the ingenuity of humanity. By using the simple yet effective concept of the pendulum, clockmakers were able to create accurate timepieces that revolutionized the way we keep time. Today, the pendulum clock may have been superseded by more advanced technologies, but its legacy lives on in the modern clocks and watches we use every day.

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Complete Question

Consider the heaviest box of 68 kg that you can push at constant speed across a level floor, where the coefficient of kinetic friction is 0.50, and estimate the maximum horizontal force that you can apply to the box. A box sits on a ramp that is inclined at an angle of 50.0 ∘ above the horizontal. The coefficient of kinetic friction between the box and the ramp is 0.50.If you apply the same magnitude force, now parallel to the ramp, that you applied to the box on the floor, what is the heaviest box (in pounds) that you can push up the ramp at constant speed? (In both cases assume you can give enough extra push to get the

Answer:

The force on the heaviest mass  is   \(F = 333.2 \ N\)

The mass on the inclined ramp is  \(M = 76.47 \ kg\)  

Explanation:

From the question we are told that

   The mass of the heaviest box is  \(m = 68 \ kg\)

   The coefficient of kinetic friction is  \(\mu_k = 0.50\)

     The angle at which the ramp is inclined is  \(\theta = 50^o\)

Generally at constant speed the acceleration is zero , which implies that

           \(F - F_f = 0\)

  Here  F is the horizontal  force applied to the heaviest box   and  \(F_f\) is the kinetic frictional  force which is mathematically represented as

        \(F_f = \mu_k * m * g\)

=>     \(F_f = 0.50 * 68 * 9.8\)

=>     \(F_f = 333.2 \ N\)

So

               \(F - 333.2 = 0\)

=>             \(F = 333.2 \ N\)

Considering the ramp inclined at an angle above the horizontal

         Generally apart from the force F  acting on the box in a direction parallel to the ramp the other force acting on the box parallel to the ramp is the net force due to frictional force on the object which is mathematically represented as

         \(F_f_h = \mu Mg cos (\theta )\)

and the weight of the object which is mathematically represented as

            \(F_w = Mg sin (\theta )\)

So the net force is  mathematically evaluated as

       \(F_n = F_w - F_{fh}\)

=>     \(F_n =Mg sin (\theta ) - \mu Mg cos (\theta )\)

=>     \(F_n =M [ 9.8 sin ( 50 )-0.50 * 9.8 cos (50 ) ]\)

=>     \(F_n = 4.3576M \ N\)

So the net force acting on the box parallel to the ramp is  mathematically represented as

      \(F_{net} = F - F_n\)  

=>    \(F_{net} = 333.2- 4.3575M\)  

=>    \(ma = 333.2- 4.3575M\)  

From the question we are told the velocity is  constant so the acceleration is zero  

   =>    \(333.2- 4.3575M = 0\)  

     =>    \(M = 76.47 \ kg\)  

Answer:

the answer is the rollar coster

Explanation:

because the rollar coster is

Answer:

Give me some time okkkk

Temporary magnets require electric current to produce magnetism and magnetic field lines B) Temporary magnets

In electromagnets, their magnetism is dependent on electricity  with an iron core in the center. If we add an iron core to a solenoid, we can increase its magnetic field strength . When we connect  a battery to a solenoid and wrap the sanded copper wire around a nail, a magnetic field is created. This force is generated by the magnetic field that's  created when current flows through the coil.

As long as there is a direct current running  through the coil, the nail will retain its magnetic properties. However, once the current stops, the magnetism of the nail is lost .  Creating electromagnets can be achieved by winding wire around the iron core.

The advantages of electromagnets are :

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Answer:

Explanation:

Work done = Force * Displacement

There is no displacement vertical so only the horizontal part of force did work.

The horizontal force = Force * cos(angle with floor)

Work done = 40*cos(40°)*2

= 61.28 J

As cos(65°) is less than cos(40°), work done will be less at 65°.

Answer: 65.25 J

Explanation:

Kinetic Energy K.E. = 1/2 * m * v^2 ; where m is the mass of the body and v is the velocity of the body ; K.E. = 1/2 * 0.145 * 30 * 30 = 65.25 Joules

To convert gr 1 (grain) to mg, you would multiply the number of grains by 64.8. Therefore, 1 grain is equal to 64.8 mg.

To convert a measurement from one unit to another, we need to use a conversion factor that relates the two units. In this case, we want to convert from grains (gr) to milligrams (mg).

The conversion factor between grains and milligrams is 1 gr = 64.8 mg. This means that for every 1 grain, there are 64.8 milligrams. We can use this conversion factor to convert any given number of grains to milligrams.

For example, if we have 5 grains and want to know how many milligrams that is, we would multiply 5 grains by 64.8 mg/gr. This gives us:

5 gr * 64.8 mg/gr = 324 mg

So, 5 grains is equal to 324 milligrams.

Similarly, if we want to convert 1 grain to milligrams, we just need to multiply 1 grain by the conversion factor of 64.8 mg/gr. This gives us:

1 gr * 64.8 mg/gr = 64.8 mg

So, 1 grain is equal to 64.8 milligrams.

Therefore, to convert any number of grains to milligrams, we simply multiply the number of grains by 64.8.

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a. The force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. The speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

a. To calculate the force acting on the astronaut by the moon, we can use Newton's law of universal gravitation:

F = G * (m1 * m2) / r^2

where:

F is the force,

G is the gravitational constant (approximately 6.67430 × 10^-11 m^3 kg^-1 s^-2),

m1 is the mass of the astronaut (75 kg),

m2 is the mass of the moon (7.35 × 10^22 kg), and

r is the distance between the astronaut and the moon's center (2.5 × 10^6 m).

Let's plug in the values and calculate the force:

F = (6.67430 × 10^-11 m^3 kg^-1 s^-2) * (75 kg) * (7.35 × 10^22 kg) / (2.5 × 10^6 m)^2

F ≈ 2.54 × 10^3 N

Therefore, the force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. To find the speed of the astronaut, we can use the centripetal force equation:

F = (m * v^2) / r

where:

F is the force (calculated in part a, approximately 2.54 × 10^3 N),

m is the mass of the astronaut (75 kg),

v is the speed of the astronaut (what we need to find), and

r is the distance between the astronaut and the moon's center (2.5 × 10^6 m).

Let's rearrange the equation to solve for v:

v^2 = (F * r) / m

v = √((2.54 × 10^3 N * 2.5 × 10^6 m) / 75 kg)

v ≈ 1.54 × 10^3 m/s

Therefore, the speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

a. The force acting on the astronaut by the moon is approximately 2.54 × 10^3 Newtons.

b. The speed of the astronaut orbiting the moon is approximately 1.54 × 10^3 meters per second.

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Answer:

220 seconds

Explanation:

The acceleration of the object with an applied force of 100N and a mass of 50kg is 2m/s².

Acceleration is defined as the change in velocity per unit time. Velocity is defined as the speed of the object in a particular direction. The acceleration is a vector quantity. The unit of acceleration is m/s².

According to Newton's second law, Force is directly proportional to the acceleration of the object. F = m×a, where F is the force of the object, m is the mass of the object and a is the acceleration of the object.

From the given,

Force, F = 100N

mass of the object, m=50kg

acceleration of the object, a=?

F = m×a

a =F/m

  = 100/50

  =2m/s².

Thus, the acceleration of the object is 2m/s².

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The final velocity of an object falling 1.25 meters from rest, just as it strikes the ground is 4.95\(\frac{m}{s}\).

The position of an object as a function of time at any point in time can be used to explain an object's motion. The equations describing the motion, which relate the initial and current velocities, acceleration, and displacement of the object, can be obtained in the form that excludes time in the case of uniformly accelerated motion. One example of a uniformly accelerated motion is free fall.

The following relationship exists between an object's velocity and its distance travelled:

Here

\(v^{2} -u^{2} =2as\)

The object's starting velocity is u

and final velocity is

Object acceleration is given by the symbol a;

The acceleration in free fall is the acceleration brought on by gravity:

a=g=9.8\(\frac{m}{s^{2} }\)

Initial velocity is 0 since the item started at rest;

When we solve for the final velocity, we get:

v = \(\sqrt{2as}\)

Calculating, we obtain:

v = \(\sqrt{2\times9.8\times1.25}\)

v=4.95\(\frac{m}{s}\)

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Answer:

it is positive feedback loop

Explanation:

It's a phenomenon scientists call a positive feedback loop: deforestation causes drought, which in turn, worsens deforestation, and so on, intensifying the effect. The study concluded that deforestation causes 4% of drought, while drought accounts for 0.13% of deforestation per millimeter of rain in the Amazon biome.

The rider is moving at a speed of 12.2 meters per second when she experiences 10 g's.

The speed at which a rider experiences 10 g's (10 times the acceleration due to gravity) on a centrifuge can be calculated using the formula:

speed = (g * r)

Where g is the acceleration due to gravity (9.8 m/s^2) and r is the radius of the centrifuge arm (in this case, 15.0 m).

Plugging in the numbers, we get:

speed = (9.8 * 15.0) = (146) = 12.2 m/s

It's important to note that high g-forces can have serious health effects, and centrifuges are often used to simulate conditions experienced by pilots, astronauts, and other people who are subjected to high g-forces.

The g-forces experienced on a centrifuge can be used to determine the limits of human tolerance and to develop measures to protect people from the harmful effects of high g-forces.

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Answer:

lighter ones will go faster

Explanation:

assuming you throw both bolwing ball with 10N of force. one is 3kg and the other is 5kg.

by using the equation: F = ma

a = F/m

a = 10/5 = 2m/s^2

a = 10/3 = 3.33333 m/s^2