Attachment Lab:Conservation of Linear Momentum

A) Heritability is NOT a requirement of a good test. Option A is correct.

Validity, Standardization, and Reliability are commonly considered requirements of a good test.

A)  Heritability refers to the proportion of variability in a trait that can be explained by genetic factors. It is a statistical concept used in the field of genetics and is not a requirement for a good test.

B) Validity refers to the extent to which a test measures what it is intended to measure.

C) Standardization refers to the process of administering a test in a standardized manner to ensure that the results are comparable across different people or groups.

D) Reliability refers to the consistency of the results obtained from a test, i.e., the extent to which a test gives consistent results when repeated under the same conditions.

These three (B, C, and D) are commonly considered requirements of a good test.

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Answer:

C. Atoms and molecules in the body can be ionized.

Explanation:

The exposure to X-rays or gamma rays can ionized the atoms and molecules present in the living things like humans.

X-rays are a type of radiation called electromagnetic waves. X-ray imaging creates pictures of the inside of your body.

A gamma ray, also known as gamma radiation, is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.

Gamma rays can pass completely through the human body; as they pass through, they can cause ionizations that damage tissue and DNA.

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Answer:

It should be normal force if it's not right plz forgive me.

Explanation:

The force of gravity between the puggle and the puma is  7.7×10⁻¹¹ Newton.

Given parameters:

Mass of the puggle; m =45 kg

Mass of the puma : M = 130 kg.

Distance between them; r = 70 m.

Then,  the magnitude of the force of gravity between the puggle and the puma is; F = GmM/r²

Where, G = universal gravitational constant = 6.6×10⁻¹¹ Si unit.

So, Gravitational force; F = ( 6.6×10⁻¹¹ )×130×45 ÷ (70)² N = 7.7×10⁻¹¹ Newton.

Hence, the magnitude of the force of gravity between the puggle and the puma is  7.7×10⁻¹¹ Newton.

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Answer:

The correct option is;

D. There is not enough information to answer this question

Explanation:

The universal gravitational constant = 6.67408 × 10⁻¹¹ 3³/(kg·s²)

For an in between distance of 1 m and equal masses of 60 kg, we have;

[tex]F = G \times \dfrac{m_{1} \times m_{2}}{r^{2}} = 6.67408 \times 10^{-11} \times \dfrac{60 \times 60}{1^{2}} \approx 2.403 \times 10^{-7} N[/tex]

The gravitational attraction ≈ 2.403 × 10⁻⁷ N, which does not correspond with the answers, therefore, the best option is that there is not enough information to answer this question.

Answer:

Explanation:

The mass of the car can be found by using the formula

[tex]m = \frac{p}{v} \\ [/tex]

p is the momentum

v is the velocity

From the question we have

[tex]m = \frac{60000}{30} = \frac{6000}{3} \\ [/tex]

We have the final answer as

Hope this helps you

The identification of the correct color of the light with the proper justification would be by student 4: violet, because it has the highest frequency, therefore the correct answer is option D.

It can be understood in terms of the distance between any two similar successive points across any wave for example wavelength can be calculated by measuring the distance between any two successive crests.

As given in the problem, students in a science class were provided with this image and asked to identify which color of light would refract the most if white light was passed through a prism.

Student 4 would correctly identify and justify violet as the appropriate hue of the light since it has the greatest frequency, making option D the right response.

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Answer:

heat energy is the form of energy produced by heat

when we burn heat a type of enery is came

Answer:

Current, I = 8 Amps

Explanation:

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex] V = IR[/tex]

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Given the following data;

Resistance, R = 30 ohms

Voltage, V = 240V

To find the current;

[tex] I = \frac {V}{R} [/tex]

[tex] I = \frac {240}{30} [/tex]

Current, I = 8 Amps

Therefore, the current of the dryer is 8 Amperes.

Answer:

5.0 kg

Explanation:

use the equation; (m1v1i) + (m2v2i) = (m1v1f) + (m2v2f)

Answer:

If I'm right it bends away

Explanation:

I learned this in class before it was fun to me

Answer:

(a) h = 16.53 m (b) t = 1.83 s

Explanation:

Given that,

The initial velocity of a ball, u = 18 m/s

When it reaches to the maximum height, its final velocity v will be 0. Let it goes to a maximum height of h meters.

Finding t using first equation of motion as follows :

v = u +at

Here, a = -g and v = 0

[tex]t=\dfrac{u}{g}\\\\t=\dfrac{18}{9.8}\\\\t=1.83\ s[/tex]

The time needed for the ball to reach its max height is 1.83 s.

Let h is the maximum height. Using second equation of motion to find it :

[tex]h=ut-\dfrac{1}{2}gt^2\\\\h=18(1.83)-\dfrac{1}{2}\times 9.8\times (1.83)^2\\\\h=16.53\ m[/tex]

So, it will go to a maximum height of 16.53 m.

Explanation:

A vehicle frame, also known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.

Until the 1930s, virtually every car had a structural frame separate from its body. This construction design is known as body-on-frame. Over time, nearly all passenger cars have migrated to unibody construction, meaning their chassis and bodywork have been integrated into one another.

Nearly all trucks, buses, and most pickups continue to use a separate frame as their chassis

Answer:

i want to say flip the coins but im not really sure sry

Explanation:

Answer:

Explanation:

KHAN ACADEMY

The correct free body diagram is option (B). There will only be two forces acting on cheese B.

By representing the tensional forces by the ropes 1 and 2 as [tex]F_{T1}[/tex] and [tex]F_{T2}[/tex] respectively, the correct free body diagram will be option B.

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Answer:

(C) Solar radiation

Explanation:

The water cycle is driven by solar energy that produces solar radiation and this drives water from ocean surface , rivers, lakes, soil and plants through transpiration , which then forms clouds and water falls back on earth as precipitation.  

Answer:

c i took the test

Explanation:

Answer:

a. The student's mistake was that the student did not swing the pendulum and start the watch at the same time.

b. 1.2 s per swing.

c. The likely effect of her reaction time is that they will should subtract two seconds off the time.

Explanation:

The pupil made the error of not simultaneously starting the watch and swinging the pendulum.

Pendulum is defined as a body that is suspended from a fixed point and moves back and forth while being pulled by gravity. The pendulum is used to gauge the gravitational pull because the force of gravity causes it to swing back toward its average position. A pendulum's time period can be used to tell the time because it is constant.

The swing of the pendulum is 1.2 sec. per swing. They should take two seconds off the timing due to her presumably slow reaction time. A pendulum's total time should be divided by the quantity of oscillations in order to determine its time period. When compared to a pendulum with a shorter string, the one back and forth cycle of a longer-stringed pendulum requires more time to complete.

Thus, the pupil made the error of not simultaneously starting the watch and swinging the pendulum.

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i think the answer is true i hope u get it correct

Answer:

balanced: a train moving at a constant speed, the moon orbiting the earth at a constant speed, a lamp sitting on a desk, an apple hanging on a tree

unbalanced: a skier coming down a mountain, a car accelerating from the start line, a soccer ball after it was kicked, a parachuter falling to ground

Explanation:

all the balanced ones are either moving at a constant speed or are skill

all the unbalanced ones were disturbed by some sort of force causing them to accelerate, go faster, blah blah blah

Answer:

Cumulus Congestus & Cumulonimbus Clouds

Answer:

The final speed is 75 m/s

Explanation:

Constant Acceleration Motion

It's a type of motion in which the velocity of an object changes uniformly in time.

Being a the constant acceleration, vo the initial speed, vf the final speed, and t the time, the following relation applies:

[tex]v_f=v_o+at[/tex]

The airplane comes from rest (vo=0) accelerating at a=25 m/s^2 for t=3 s.

The final speed is:

[tex]v_f=0+25~m/s^2\cdot 3~s[/tex]

[tex]v_f=75~m/s[/tex]

The final speed is 75 m/s

Answer:

the answer is c. hope this help you out

Answer:

Digestive = large instestine

respiratory = lungs

circulatory red blood cell

neurons=nerves

Explanation:

Answer:

Some people have went through some things, but people will be people. I've heard people are born neutral, but are affected by the environment they live in.

Explanation:

Answer:

0.5m/s²

Explanation:

Given parameters:

Initial velocity  = 0m/s

Final velocity  = 5m/s

Time taken  = 10s

Unknown:

Acceleration of the bicycle  = ?

Solution:

Acceleration is the rate of change of velocity with time.

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

v is the final velocity

u is the initial velocity

t is the time taken

  Insert the parameters and solve;

     Acceleration = [tex]\frac{5-0}{10}[/tex]   = 0.5m/s²

Answer:

5 cm

Explanation:

We are given that,

The density of metal = 8 g/cm^3

The Mass of the Solid Cube = Mass of the metal  = 1 kg = 1000 g

We know that,

Density = Mass / Volume

8 = 1000 / V

[tex]V = 1000/8\\V = 125 cm^3[/tex]

Hence, as the volume of the solid cube is 125 cm^3, its side will be the volume's cube root which is 5 cm

Answer:

a) The car travelled a distance of 15 centimeters.

b) The displacement of the car is -15 centimeters.

c) The new position of the car on the track is 65 centimeters.

Explanation:

a) From Mechanical Physics we know that the distance travelled is magnitude of the route covered by the vehicle. If this car travels in a straight line and at constant velocity, then we can calculate the distance traveled by the following expression:

[tex]\Delta s = v\cdot \Delta t[/tex] (Eq. 1)

Where:

[tex]v[/tex] - Speed of the car, measured in centimeters per second.

[tex]\Delta t[/tex] - Time, measured in seconds.

[tex]\Delta s[/tex] - Distance travelled by the car, measured in meters.

If we get that [tex]v = 5\,\frac{cm}{s}[/tex] and [tex]\Delta t = 3\,s[/tex], then the distance travelled by the car is:

[tex]\Delta s = \left(5\,\frac{cm}{s} \right)\cdot (3\,s)[/tex]

[tex]\Delta s = 15\,cm[/tex]

The car travelled a distance of 15 centimeters.

b) The displacement is the vectorial distance between final and initial position. Then, we find that initial and final positions of the car are, respectively:

Initial position:

[tex]s_{o} = 80\,cm[/tex]

Final position: ([tex]s_{o} = 80\,cm[/tex], [tex]\Delta s = 15\,cm[/tex])

[tex]s_{f} = s_{o} -\Delta s[/tex] (Eq. 1)

[tex]s_{f} = 80\,cm-15\,cm[/tex]

[tex]s_{f} = 65\,cm[/tex]

And the displacement of the car is: ([tex]s_{o} = 80\,cm[/tex], [tex]s_{f} = 65\,cm[/tex])

[tex]d = s_{f}-s_{o}[/tex] (Eq. 2)

[tex]d = 65\,cm-80\,cm[/tex]

[tex]d = -15\,cm[/tex]

The displacement of the car is -15 centimeters.

c) The position of the car is its location regarding a point of reference. From point b) we find that the new position of the car on the track is:

[tex]s_{f} = 65\,cm[/tex]

The new position of the car on the track is 65 centimeters.