As a light wave strikes a shiny surface like a piece of polished metal, it will be
refracted
reflected
absorbed
Please help!!!!!

Answer: ΔPEg = mgh

Explanation: Increases in height and the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.

Answer:

B I'm Pretty Sure :DDD

Explanation:

Balanced Forces

In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force. You observed that the object did not move. When the forces on an object are equal and in opposite directions, the forces are balanced, and there is no change in motion.

Answer:

If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called?

A. delta point

B. distance system

C. coordinate system

D. reference point

hope it helps :)

Answer:

279 m/s

Explanation:

Answer:

2m/s^2

Explanation:

A=(u-v)/t

where u=final velocity and v=initial velocity and t=time

therefore u =70 and v=0 because the question said velocity of rest and finally t=35

so, (70-0)/35= 70/35=2

Explanation:

using Charles law

V1/T1 = V2/T2

2/ T1 = 4/300

cross multiply

4 X T1 = 2 X 300

T1 = 600/4 = 150

T1 = 150°k

Answer:

The gas, which is usually a hydrocarbon fuel, provides the energy. So when the fuel burns with oxygen in the air, it creates heat energy.

Explanation:

Therefore, chemical energy in carbon is released during the combustion process. Carbon dioxide is created, because the carbon-oxygen chemical bonds in the carbon dioxide form which releases heat.

Hope this helps! Have a good day :)

Explanation:

what is asked give brief explanation about question

Answer:

2:Venus is often named as Earth's twin because both worlds share a similar size, surface composition and have an atmosphere with a complex weather system. ... Both planets have almost the same size and density and Venus is only a 30% closer to the Sun than Earth 1:116d 18h 0m 3: The atmosphere of Venus is made up almost completely of carbon dioxide. It also includes small doses of nitrogen and clouds of sulfuric acid. ... This composition causes a runaway greenhouse effect that heats the planet even hotter than the surface of Mercury, although Venus lies farther from the sun.

Explanation:

Answer:

The answer is in my picture.

Explanation:

I hope you have a nice day and please mark me bye(:

Answer:

There is 18

Explanation:

Answer:

The normal force must equal the weight.

Explanation:

Hope this helps..

Hi there!

Because of Newton's Third Law, the force exerted by the sprinter on the track is equal and opposite to the force exerted by the track on the sprinter.

We can begin by calculating the sprinter's acceleration. Use the equation:

vf² = vi² + 2ad

Rearrange for acceleration:

(vf² - vi²)/2d = a

Plug in values:

(8² - 2²)/2(2.5) = 60/5 = 12 m/s²

Calculate the force:

∑F = ma

∑F = 60 × 12 = 720 N. This is the amount of force exerted by the track on the sprinter in causing him to accelerate forward.

Thus, the backward force exerted by the sprinter on the track is the opposite, or -720 N.

The characteristics of the ionic bonds allows to find the results for the question about which compound are ionic is:

    d) Compounds D and A.

Chemical compounds are formed by atoms linked by electrostatic forces, where one of the elements gave up some electrons and the other element acquired these electrons, the two atoms being in an ionic state, consequently the bond is strong and has several characteristics:

In these characteristics, let's analyze the compounds in the table.

Let's review the different alternatives:

a) False. Compound A and B has a low melting point.

b) False. The B and C compounds have low melting points.

c) False. Compound C has a low melting point.

d) True. The two compounds meet all the characteristics of ionic compounds.

In conclusion with the characteristics of the ionic bonds we can find the results for the question about which compound are ionic is:

       d) Compounds D and A are ionics.

Learn more about ionic bonding here:  brainly.com/question/13526463

Answer: Gravity has an effect of a gravitational pull, which keeps things on the ground instead of floating around like we are in space.

Answer:

hello

The sun's gravity keeps Earth in orbit around it, keeping us at a comfortable distance to enjoy the sun's light and warmth

Explanation:

hope it helps

good day

tysm ☀❤✅✌

Answer:

Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn)

Explanation:

hope this helps

Answer:

Ep=mgh

Ep=419000×9.8×30

Ep=123,186,000 J

the gravitational potential energy is 123 186 000 joules

Answer:

In most plants, the leaves are the main food factories. They capture the sun's energy with the help of chlorophyll in the leaf cells. The chlorophyll traps and packages the energy from the light of the sun in a process called photosynthesis. Leaves usually have a large surface so they can collect the most sunlight.

Explanation:

Hope this helps...maybe

Answer:

C

Explanation:

The horizontal distance that the cannonball will travel is 383.33m

In order to find the horizontal distance, we will use the formula for calculating the range expressed as:

[tex]R = u\sqrt{\frac{2H}{g} }[/tex] where:

u is the velocity

H is the height

g is the acceleration due to gravity

[tex]R = 120\sqrt{\frac{2(50)}{9.8} }\\R = 120\sqrt{\frac{100}{9.8} } \\R=120\times 3.1943\\R=383.33m[/tex]

Hence the horizontal distance that the cannonball will travel is 383.33m

Learn more here: https://brainly.com/question/19028766

Answer:

The physical activity pyramid helps in organizing the person's daily life routine. It separated the exercises into different levels and helps the person to inherit a fit and healthy life style.

Answer:

D. Measurements are taken in a way that is the same every time

Explanation: I took the quiz and got it right.

Answer:

3

community

4

ecosystem

1

organism

2

population

Explanation:

i did it other guy worng

The average velocity of the car traveling south and later returned to the starting point is 0.

Average velocity is defined as the change in displacement per change in the time of motion.

Average velocity is calculated as follows;

[tex]v = \frac{\Delta x}{\Delta t} = \frac{x_2 - x_1}{t}[/tex]

Let the initial displacement of the car, x₁ = 20 m

Let the final displacement of the car, x₂ = 20 m (since the car returned to the starting point).

The average velocity is calculated as;

[tex]v = \frac{x_2 - x_1}{t} = \frac{20 - 20}{5} = 0[/tex]

Thus, the average velocity of the car traveling south and later returned to the starting point is 0.

Learn more here:https://brainly.com/question/18153640

Answer:

PE = 58.8J

Explanation:

potential energy = mgh

mass = 2kg

g = 9.8m/s^2

h = 3m

Answer:

7 feet because 2 feet and 5 feet make seven.

Answer:

equal

Explanation:

both pursue same amount of weight

Answer:

O scientific method

Explanation:

Answer:

definition of force

Explanation:

It states that "the rate of change in momentum is proprtional to the force applied"

[tex]{ \rm{momentum = mass \times velocity}} \\ [/tex]

• from the law stated:

[tex]{ \rm{ \frac{ \delta momentum}{time} = force}} \\ \\ { \rm{ \frac{mv - mu}{time} = force}} \\ \\ { \rm{ \frac{mass(v - u)}{time} = force}} \\ \\ { \rm{mass \times \frac{(v - u)}{time} = force }}[/tex]

• from first newton equation:

[tex]{ \boxed{ \tt{ \frac{v - u}{t} = acceleration}}} \\ [/tex]

• therefore

[tex]{ \rm{mass \times acceleration = force}} \\ \\ { \boxed{ \rm{force = mass \times acceleration}}}[/tex]

The Answer would be Indo - Europeans

[tex]\\ \sf\longmapsto 5.5t=1.2t^2[/tex]

[tex]\\ \sf\longmapsto t^2=\dfrac{5.5}{1.2}[/tex]

[tex]\\ \sf\longmapsto t^2=4.58[/tex]

[tex]\\ \sf\longmapsto t=\sqrt{4.58}[/tex]

[tex]\\ \sf\longmapsto t=2.1[/tex]