Knife

Has a sharp edge and can cut bread or fruit and can spread butter or jam

Has a sharp edge and can cut bread or fruit and can spread butter or jam

Use the sentence to answer the question.

Light is affected by gravity.

Which inference can be made based on this fact?

(1 point)

Light behaves differently in space than on Earth.

Light behaves differently in space than on Earth.

Gravity causes light to refract.

Gravity causes light to refract.

Light moves faster in space than on Earth.

Light moves faster in space than on Earth.

Stronger gravity causes an increase in light.

**Answer:**

Light behaves differently in space than on Earth.

**Explanation:**

Because the gravity field is greater near earth than in most of space. Not the areas near stars, black holes, pulsars, and such but in the vast emptyness between the clumpy spots.

The number of wavelengths that pass a fixed point on a wave is called ______?

**Explanation:**

it's called a wave frequency

im pretty sure but than again I'm in Middle School but just trust me

**Answer:**

wave frequency i think. hope its helps

Scenario 3: You are driving through a rain storm talking to your family but you can only hear every other word. What 2 medias are the waves passing in this scenario?

The sound waves are passing through the sound of the rain and the air around you

A student takes the temperature of a bottle of liquid water and a tub filled with ice. The student then places the bottle of liquid water into the tub of ice. After 15 minutes, which of the following best describes what happens to the temperature of each?

There will be **exchange of heat in the system**, the tub filled with ice will **gain heat,** while the bottle of liquid will **lose heat.**

The flow is made possible by means of **convection** which implies heat flow from region of higher concentration to region of low concentration

by actual **movement of material particles**

There are basically three modes of heat transfer

RadiationConvectionConductionLearn more:

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**Explanation:**

if you go to connexus and are doing the science

Thermal Energy Unit Test 10 qestions 8th grd unit 5 test lesson 12 here are the correct answers

1. A. metal is heated from room temperature to 200'C.

2. B. The particles will have more space between them as steam, but they will be moving at the same speed in both states.

3. C. The potential energy decreases due to the tighter arrangement of the particles.

4. B. an increase in heat and an increase in kinetic energy until a phase change occurs.

5. C. thermometer

6. B. 4.

7. D. convection

8. C. Air moves from the areas of higher temperature to areas of lower temperature.

9. C. The temperature of the ice increases, while the temperature of the water decreases

10. A. heat transfer by radiation.

i hope this helps and please let me know if it does! = ) <3

The columns in the periodic table are called groups. What do the elements in group 18 have in common￼￼￼

A. They are found only in compounds in nature

B. They tend to form ions of a -1 Electric charge

C. They tend to form ions with a +1 electric charge

D. They rarely react with any other elements

**Answer: D**

**Explanation:**

they are all odorless, colorless, monatomic gases with very low chemical reactivity.

Brainliest?

The **elements** in group 18 that they **rarely** **react** with any other elements. The correct option is **D**.

The periodic table, also known as the **periodic** **table** of the elements, is an arrangement of chemical elements in **rows** and **columns**.

It is widely used in chemistry, **physics**, and other sciences, and is widely regarded as a **chemistry** icon.

The periodic table is worked upon by **scientists** to quickly refer to information about an element, such as its **atomic** **mass** and chemical **symbol**.

The **arrangement** of the periodic table also allows scientists to detect trends in element properties such as **electronegativity**, ionization energy, and **atomic** **radius**.

The **noble** **gases** are found at the far right of the periodic table and were previously known as "**inert** **gases**" due to their filled valence shells, which make them extremely **nonreactive**. In comparison to other element groups, noble gases were discovered relatively late.

Thus, the correct option is **D**.

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A 20 metric ton train moves toward the south at 50 m/s. At what speed must it travel to have four times its original momentum

**Answer:**

200 m/s

**Explanation:**

as momentum is a product of mass and speed, and mass is not changing, four times the speed will result in four times the momentum.

p = mv

4p = m(4v)

At **200m/s velocity** of the train, the momentum of the train will be four times its original momentum. This is because the velocity is directly proportional to the **momentum **of an object.

**Momentum **is the tendency of an object to remain in motion. It is the product of the mass of the object and the velocity of the object. It is denoted by "p". Momentum is a **vector quantity** because it has both the magnitude and direction. The **unit **of Momentum is **g.m/s.**

The **momentum** can be calculated with the formula:

**p = m × v**

where, p = momentum of the object,

m = mass of the object,

v = velocity of the object.

The **momentum** is directly proportional to the mass and velocity of the object. Hence, to increase the momentum of the train by four times the mass or velocity of the train needs to be increased by four times.

The** increase **in the **velocity **of the train by four times will increase the **momentum** of the train.

Original Velocity of the train = 50 m/s

**Increased Velocity** of the train = 50 × 4 = 200 m/s

Increased new Momentum of the train = mass × new velocity

Increased Momentum = 20 metric ton × 200m/s

**Increased Momentum **= 4000 metric ton. m/s

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what is the value of acceleration due to gravity g at the pole of earth

**Answer:**

**Explanation:**

Answer: about 9.832 m/s2:

In combination, the equatorial bulge and the effects of the surface centrifugal force due to rotation mean that sea-level gravity increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles, so an object will weigh approximately 0.5% more at the poles than at the Equator

Bye, have a wonderful Christmas!

In combination, the equatorial bulge and the effects of the surface centrifugal force due to rotation mean that sea-level gravity increases from about 9.780 m/s2 at the Equator to about 9.832 m/s2 at the poles, so an object will weigh approximately 0.5% more at the poles than at the Equator

Bye, have a wonderful Christmas!

When shopping for margarine what information should you look for on the label

**Answer:**

When buying a margarine, people should look for trans fat and saturated fat content. If it is over 2%, then it is not healthy. If it is lower that means it is healthy and fresh!

**Explanation:**

Marks: 1

What is the power of a light that uses 300 joules of energy in 60

seconds?

18,000 W

50 W

5 W

0.2 W

**Answer:**

W = 5W

**Explanation:**

1W = 1J/s

W = Watts

J = Joules

s = seconds

W = J/s

W = 300J/60s

W = 5W

True or False: When looking at kinetic vs. thermodynamic products the kinetic product predominates at low temperature.

**Answer:**

true answer this question

Calculate the change in the kinetic energy (KE) of the bottle when the mass is increased. Use the formula

KE = one half.mv2, where m is the mass and v is the speed (velocity). Assume that the speed of the soda bottle falling from a height of

0.8 m will be 4 m/s, and use this speed for each calculation.

Record your calculations in Table A of your Student Guide.

When the mass of the bottle is 0.125 kg, the KE is

✔ 1

kg m2/s2.

When the mass of the bottle is 0.250 kg, the KE is

✔ 2

kg m2/s2.

When the mass of the bottle is 0.375 kg, the KE is

✔ 3

kg m2/s2.

When the mass of the bottle is 0.500 kg, the KE is

✔ 4

kg m2/s2.

Answer included in Question

**Answer:**

kinetic energy is given as KE = (0.5) m v²given that : v = speed of the bottle in each case = 4 m/s when m = 0.125 kg KE = (0.5) m v² = (0.5) (0.125) (4)²

**Explanation:**

**Answer:**

1. 0.5 2. 2 3. 3.75 4. 5

**Explanation:**

Air currents escape room level 3 how to do it

**Answer:**

just do it. it's simple be smart friends

A ball is launched as a projectile with initial speed v at an angle Î¸ above the horizontal. using conservation of energy, find the maximum height hmax of the ball's flight. express your answer in terms of v, g, and Î¸Î¸.

**Answer:**

**Explanation:**

I will us θ as the angle above horizontal as I don't know how to make your chosen symbol for angle.

KEy = PE

½m(vsinθ)² = mgh

** h = (vsinθ)²/2g**

WILL GIVE BRAINLIEST!!! NO LINKS PLZ!!!!

A 225 g hockey puck is sliding on ice in an arena towards the end boards that are 15.7 m away. The puck is travelling 12.0 m/s when it slides into some rough ice (coefficient of kinetic friction= 0.550).

Determine:

a) the acceleration of the puck on the rough ice.

b) the distance from the end boards the puck is when it comes to a stop.

Please show work.

**Answer:**

**Explanation:**

a) the acceleration of the puck on the rough ice.

a = μg = 0.550(9.81) = 5.3955 = **5.40 m/s²**

(comes from μ = F/N = ma/mg = a/g)

b) the distance from the end boards the puck is when it comes to a stop.

v² = u² + 2as

0² = 12.0² + 2(-5.40)s

s = 13.3 ft

so distance from the boards is

15.7 - 13.3 = **2.4 m**

by the way...that's some VERY rough ice...more like sand.

You illuminate the surface of some metal with green laser and observe the photocurrent. If you decrease the intensity of laser, the stopping potential will

Remain the same.

**Explanation****:**

The kinetic energy of the ejected electrons, and thus the resulting photocurrent, does not depend on the intensity of the incident radiation. Instead, it depends on the frequency. So since the stopping potential is used to reduce the photocurrent to zero and the photocurrent does not depend on the intensity, the stopping potential remains the same.

which of the following are ways in which energy can be transferred to or from a substance?

a.) heat and internal energy

b.) work and internal energy

c.) heat and work

d.) heat and kinetic energy

**Answer:**

a

**Explanation:**

the answer is a because it is feasible

help with this please

**Answer:**

I think that those are all true but I'm not completely sure.

A section of a rollercoaster is shown below. If the 17,500 kg rollercoaster momentarily comes to rest at point A, where it is 19 m in the air, how fast is it going at point D?

**Answer:**

**Explanation:**

Impossible to say without knowing how high point D is.

If we ignore friction, the energy converted from potential energy will exist as kinetic energy.

let d be the height in meters of point D "in the air"

mg(19 - d) = ½mv²

m is common so divides out

g(19 - d) = ½v²

v = √(2g(19 - d))

no sense in making g any more precise than the height. g = 9.8

v = √(2(9.8)(19 - d))

**v = √(19.6(19 - d))**

Kyle, a 23-year-old-male, feels as if he is always on the “edge of his seat,” as if something is going to happen. He also has problems sleeping. Kyle feels nervous continuously and cannot seem to relax. When asked if he is nervous about something in particular, he can’t pinpoint the source of his anxiety.

Based on the information given, it can be posited that Kyle has a** general anxiety disorder.**

**Generalized Anxiety Disorder **is a **disorder** that is characterized by persistent and excessive worry about different things. People with the disorder may anticipate **disaster** and are concerned about money, health, family, or other issues.

Some of the effective ways of** treatment** are spending more time with family and friends, doing regular **exercises
,** enough sleeping, etc.

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A 5 kilograms bowling ball is dropped out a window. It hits the ground, and bounces upward. The velocity change of the ball is noted to be 15 m/s downward and 12 m/s upward. What is the contact time for the ball if the force applied on the ball from the ground is equal to 10 N?

**Answer:**

13.5

**Explanation:**

Mass: 5kg

Initial Velocity: -15

Final Velocity: 12

Force: 10

We can use the equation: Vf = Vi + at

We need to find acceleration, and we can use the equation, F=ma,

We have mass and the force so it would look like this, 10=5a, and 5 times 2 would equal 10, so acceleration would be 2.

Now we have all the variables to find time.

Back to Vf = Vi + at, plug the numbers in, 12 = -15 + 2(t)

Plugging them in into desmos gives 13.5 for time.

Question 4 of 10

What is thermodynamics?

A. The movement of matter

B. The flow of fluids

C. The movement of particles

D. The flow of energy, heat, and work

SUBMIT

**Answer:**

**Explanation:**

D.

Thermodynamics is the study of how different types of energy is transferred through the chemical systems

**Answer: Thermodynamics is the flow of energy, heat, and work.**

**Explanation: This is seen in the formula for the first law of thermodynamics, U = Q - W, or “The change of the internal energy of a system (U) is equal to the heat absorbed (Q) minus the work done by that system (W).”**

the distance between two charges q a and q b is r and the force between them is F. What is the force between them if the distance between them is doubled?

The force will be reduced to 1/4 of the original

**Explanation:**

According to Coulomb's law, the force between two charges [tex]q_a\:\text{and}\:q_b,[/tex] separated by a distance *r** * is given by

[tex]F = k\dfrac{q_aq_b}{r^2}[/tex]

where k is the Coulomb constant.

Now let F' be the force between the two charges when their separation distance is doubled. We can write this force as

[tex]F' = k\dfrac{q_aq_b}{(2r)^2} = k\dfrac{q_aq_b}{4r^2}[/tex]

[tex]\;\;\;\;\;= \frac{1}{4}\left(k\dfrac{q_aq_b}{r^2}\right) = \frac{1}{4}F[/tex]

Therefore, the force will be reduced to a quarter of its original value.

Hope you could understand.

If you have any query, feel free to ask.

Help!

A man standing in front of a plane mirror finds his image to be at a distance of 6m from himself. The distance of man from the mirror is

**Answer:**

The distance of man from the mirror is 3 m

**Refer**** ****to**** ****the**** ****attachment**

[tex]\Large\textsf{Hope \: It \: Helped}[/tex]

The distance of the man from the **mirror **is **3m**

From the characteristics of image formed in a plane mirror,

Virtual and erectFormed behind the mirrorSame size as the objectLaterally inverted Distance of the image behind the mirror is the same as the distance of the object from the mirror.⇒ From the last point,

Let the distance of the image behind the mirror be xAlso the distance of the man from the mirror is x⇒ From the question,

x+x = 62x = 6x = 6/2x = 3 mHence, The distance of the man from the **mirror **is **3m**

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Word Bank:

Electrical

Mechanical

Chemical

Light

Thermal

Sound

**Answer:**

Light to

Electrical to

mechanical and sound

Important parts of stydi g physics

**Answer:**

put your question in proper way' i hope you understand.

**Explanation:**

What happens when an unstoppable force meets an immovable object?

the unstoppable object will stop regardless.

If you apply a net force of 100 N to the hoverboard, and it accelerates

2m/s/s, how much mass does it have?

**Answer:**

**Explanation:**

The mass of an object given only the force acting on it and it's acceleration can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force in N

a is the acceleration in m/s²

From the question

f = 100 N

a = 2 m/s²

We have

[tex]m = \frac{100}{2} = 50 \\ [/tex]

We have the final answer as

50 kgHope this helps you

Which of these is Newton's 3rd law of motion?

Equal and opposite forces

F = m x a

Inertia

Gravity

the answer is equal and opposite forces.

Marks: 1

How much does a man weigh if it takes 60J of energy to climb onto a

table that is 75cm tall?

4500 N

45 N

80 N

0.8 N

**Answer:**

**Explanation:**

E = mgh

mg = E/h

mg = 60/0.75 = **80 N**

As shown in the figure below, a uniform solid sphere rotates about a vertical support on a frictionless bearing. A light cord passes around the equator of the sphere, over a uniform solid disk, and is attached to a hanging mass. The sphere, disk and hanging mass all have equal mass M. The sphere and disk have the same radius R. Find the acceleration of the hanging mass if the string does not slip on the sphere or the disk. Express your answer in terms of M, R and g as needed...

**Answer:**

**Explanation:**

[tex] \boxed{ \sf \: better \: luck \: at \: your \: class}[/tex]

A **uniform solid** sphere revolves around a vertical support on a **frictionless** bearing.

A **solid disk **is covered with a light string that circles the sphere's equator, over which is suspended a **mass**. The mass M of the hanging mass, disk, and** sphere** is the same.

The **radius R** of the sphere and disk is the same. If the string does not slip on the sphere or disk, determine the **acceleration** of the hanging mass. If necessary, explain your** response** in terms of M, R, and g.

A **uniform solid **sphere revolves around a vertical support on a **frictionless** bearing, as seen in the illustration below. Around the sphere's equator, a thin cable travels over a** solid surface.**

Therefore, A **uniform solid** sphere revolves around a vertical support on a **frictionless** bearing.

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T vas a ________. la clase de ciencias la clase de matemticas la clase de estudios sociales la clase de ingls
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Explain The process of Photosynthesis according to the chemical formula: Identify: The reactants(input), the products(outputs), and the energy source. **(Hint: Carbon Dioxide + Water = Glucose + Water)
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