80 POINTS, BRAINLIEST, AND QUESTION IS MULTIPLE CHOICE!!! (please answer quickly)

question:

If all matter has a gravitational force, why don’t two tennis balls on the ground move towards each other on their own?

A. The force of gravity from the tennis balls is too small.
B.The tennis balls are outside of each other’s gravity field.
C.The tennis balls are too small to produce any gravity.
D.There is too much friction between the balls and the ground
(the picture is just of the question)

Answer:

Part A

The distance travel by the rock is approximately 132.496 m

Part B

The speed when the rock hits the ground is approximately 50.96 m/s

Explanation:

Part A

The question is focused on the kinetics equation of a free falling object

The given parameter is the time it takes the rock to hit the ground, t = 5.2 s

For an object in free fall, we have;

h = 1/2·g·t²

Where;

h = The height from which the object is dropped

g = The acceleration due to gravity ≈ 9.8 m/s²

t = The time taken to travel the distance, h = 5.2 s

∴ h = 1/2 × 9.8 m/s² × (5.2 s)² ≈ 132.496 m

The distance travel by the rock, h ≈ 132.496 m

Part B

The speed, 'v', when the rock hits the ground, is given by the following kinematic equation,

v = g·t

∴ v = 9.8 m/s² × 5.2 s = 50.96 m/s

The speed when the rock hits the ground, v ≈ 50.96 m/s.

Answer:

D. Wind and solar energy help save money and reduce air pollution.

Explanation:

Answer:

d

Explanation:

edge 2021

Answer: A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.

Answer:

1400joules

Explanation:

work(j)= force × distance.

Distance is from 5m to 12 that is 7m

Force, we weren't given, and the formula is mass × acceleration due to gravity. mass is 20kg and a is 10 or 9.8

f= 20×10

f=200

work= 200 × 7

work= 1400joules

Hope it helped(...and is correct )

Answer:

See Explanation

Explanation:

The question is incomplete, as there are no diagrams or options to provide more information to the question.

The general explanation is as follows:

For the object not to move

(1): The forces acting on the object must opposite each other. i.e. if force A acts at the right (or positive direction), force B will act at the left (or negative direction).

(2) The two forces must be equal.

So, for instance:

If the pair of forces are 5N and 5N in opposite directions, the object wil not move.

However, if one of the forces is greater, the object will move towards the direction of the greater force.

Answer:

Look below.

Explanation:

If additives are having negative effects on health and the environment, it would be wise to not use detergents containing these additives. These additives could threaten living things such as humans and animals.

There is concern that extra additives in detergents can have negative health and environmental impacts, then it would be very unwise to use detergents containing these additives

It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.

There are several types of pollution that exist in our nature depending on the state and composition of the contaminant, for example, water pollution can exist due to the eutrophication process.

It would be quite unwise to use surfactants that include these additional ingredients since there is fear that they might have a harmful influence on your well-being and the environment.

To learn more about pollution from here, refer to the link;

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Answer:

option A

Explanation:

the diameter is twice the length of the radius

hope it helps

Answer:

friction force

Explanation:

friction forces a force that opposed the relative motion of two bodies in contact or when sliding

Answer:

0.36 J

Explanation:

[tex]PE = \frac{1}{2} kx^{2} \\PE = \frac{1}{2} (200 N/m)(0.06 m)^{2} \\PE = 0.36 J[/tex]

Answer:

Harish went 1.92 Km in 2 minutes.

Explanation:

Harish is running at 16 m/s (Meters per second) and we need to find how far he goes in 2 minutes.

We can use this formula to calulate the distance:

m/s x time

We know that Harish is going 16m/s so let's plug that in:

16 (m/s) x time

We also should know that 2 minutes is 120 seconds - Let's plug that in too:

16 (m/s) x 120 (Seconds)

Now we calculate:

16 x 120 = 1920

Harish went 1,920 meters in 2 minutes.

Even though we have a correct answer, we can still make it easier to read by converting meters into kilometers.

1 Kilometer (Km) is equal to 1,000 meters.

All we need to do now is divide 1,920 by 1,000 and that will gove us our simplified answer of:

1.92 Km

Answer:

1.92 km

Explanation:

I will explain you:

2×60=120

we have to take 16×120=1920km bro

Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases.  The correct option is B.

Convection is a method of heat transfer that occurs in fluids (liquids and gases) and involves the movement of material carrying thermal energy. In convection, heat is transferred by the movement of hot fluid from one place to another, which then causes the transfer of heat from the hot fluid to the cooler fluid or surface it comes into contact with.

Convection can occur in two ways:

Natural convection: It occurs due to the density differences caused by temperature variations within a fluid. When a fluid is heated, its density decreases, making it lighter and causing it to rise. As it rises, it cools, becomes denser and falls back down, creating a cycle that is known as a convection current.

Forced convection: In this type of convection, a fluid is forced to flow over a surface or through a channel, by an external agent like a fan or pump. The forced flow enhances the rate of heat transfer from the surface or through the channel, as compared to natural convection, where the fluid flow is driven only by buoyancy forces.

Convection is a very important process for heat transfer in many natural and industrial applications, including heating and cooling systems, meteorology, oceanography, and more.

Here in the Question,

Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases. As the sun heats up the surface of the ocean, the air above it also heats up and rises. This creates a low pressure area that draws in cooler air from over the land, resulting in a breeze that blows from the ocean towards the shore. This is why sea breezes are generally felt during the day, when the land is warmer than the sea, and why they tend to die down at night, when the opposite occurs.

Therefore, The correct answer is B i.e convection.

To learn about the difference between conduction and convection click:

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I think the word would be increases. I don't know what the options are though.

Explanation:

The SI unit of measurement for speed is metres per second (m/s) .

Speed : The distance travelled by a body per unit time is know as speed.

Hope it will help.

Answer:

Momento = 170.8 Kgm/s

Explanation:

Dados los siguientes datos;

Masa = 3,05 kg

Velocidad = 56 m/s

Para encontrar el impulso;

El momento se puede definir como la multiplicación (producto) de la masa que posee un objeto y su velocidad. El momento se considera una cantidad vectorial porque tiene magnitud y dirección.

Matemáticamente, el momento viene dado por la fórmula;

[tex] Momento = masa * velocidad [/tex]

Sustituyendo en la fórmula, tenemos;

[tex] Momento = 3.05 * 56 [/tex]

Momento = 170.8 Kgm/s

Answer:

2500 and kg its is very easy do with method

Answer:

d

Explanation:

Answer:

the thermal energy absorbed is 46,893 J

Explanation:

Given;

mass of the water, m = 145 g = 0.145 kg

initial temperature of the water,  t₁ = 23 ⁰C

final temperature of the water, t₂ = 100 ⁰C

specific heat capacity of water, c = 4,200 J/kg.⁰C

The thermal energy absorbed is calculated as;

H = mcΔt

H = 0.145 x 4,200 x (100 - 23)

H = 46,893J

Therefore, the thermal energy absorbed is 46,893J

Answer: The amplitude is 0. (assuming that the amplitude ot both initial waves is the same)

Explanation:

When two monochromatic light waves of the same wavelength and same amplitude undergo destructive interference, means that the peak of one of the waves coincides with the trough of the other, so the waves "cancel" each other in that point in space.

Then if two light waves undergo destructive interference, the amplitude of the resultant wave in that particular point is 0.

Answer:

No, the resulting wave in the diagram does not demonstrate destructive interference. The resulting wave in the diagram shows a bigger wave than Wave 1 or Wave 2. If it demonstrated destructive interference, it would be a smaller wave or a horizontal line. With destructive interference, waves break down to form a smaller wave, or cancel each other out, resulting in no wave formation.

Explanation:

edge

Answer:

7.33 kg

Explanation:

F = ma

88 N = m(12 m/s^2)

m = 7.33 kg

Answer:

in ine experiment the teacher determined

Answer: 0,96 m

Explanation: speed in concrete is 4300 m/s

According to wave equation speed v = lambda × frequency

Lambda = speed /frequency

Answer:

i cant do your whole assignment for you man

Explanation:

Answer:

the answer is kinetic energy

Answer: The items listed in the attached file is correctly matched below.

Explanation:

51.) Temperature --> ( Kelvin). This is the correct option as the standard international unit of temperature is measured in Kelvin.

52.) Needle --> ( wedge). An example of a wedge is a needle as they are simple machine designed to make work easier.

53.) Wood --> ( non - magnetic material). This is the correct option as wood can not be attracted by a magnet.

54.) Door knob--> (wheel and axle). The door knob is a type of wheel and axle as it has a wheel portion which is the knob and an axle which is the rod in the door that turns the same axis.

55.) Ramp --> (inclined plane). A ramp is an inclined plane which has a sloping surface.

56.) Like forces --> (repels each other). In an electrostatic field, two charged objects repels each other if they have like forces.

57.) Mass --> ( kilogram). This is the correct option as the standard international unit of mass is measured in kilogram.

58.) Friction --> ( oppose motion). This is correct as friction is the force that poses resistance to a moving object.

59.) Cobalt coin -->( magnetic material). This is the correct option as cobalt coin can be attracted by a magnet.

60.) Lemon crusher --> ( Class 2 lever). This is correct as the lemon (load) is at the middle of the fulcrum ( squeezer) and the effort (hand)

61.) Sew saw -->( Class 1 lever). This is correct as in first class lever type of machine, the fulcrum is in-between the load and the effort.

62.) Wheel and axle --> ( Grooved wheel with rope around)

63.) Unlike forces --> ( attracts each other). In an electrostatic field, two charged objects attracts each other if they have unlike forces ( that is, one is positive and the other is negative).

64.) Earth pulls everything towards --> (Gravitational force). This is correct as stated by Newton's law of universal gravitation. This law states that every massive particle in the universe attracts every other massive particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

65.) Wedge --> (Device to split object apart). This is correct as wedge is a type of simple machine which is used to split objects apart.

Answer:

The items with their corresponding match is presented as follows;

51. Temperature ↔ Kelvin

52. Needle ↔ Wedge

53. Wood ↔ Non-magnetic material

54. Door knob ↔ Wheel and axle

55. Flange ↔ Grooved wheel with a rope around

56. Like forces ↔ Repels each other

57. Mass ↔ Kilogram

58. Friction ↔ Oppose motion

59. Cobalt coin ↔ Magnetic material

60. Lemon crusher ↔ Device to split objects apart

61. See saw ↔ Class I lever

62. Wheel and axle ↔ Class II lever

63. Unlike forces ↔ Attract each other

64. Earth pulls everything towards ↔ Gravitational force

65. Wedge ↔ Inclined plane

Explanation:

Answer:b

Explanation:

i just did the quiz i was look for it too then got it

The point on this graph do reactants begin to produce products as they collide is B.

The chemical reaction is the reaction between two reactants which led to the formation of products.

The products are substances which forms after reaction. The reactants are the substances which are original materials.

This graph shows how the reactants are reacted and products are formed in a chemical reaction.

As the reaction proceeds, the potential energy is higher when reactants begin to produce products.

Thus, the point on this graph do reactants begin to produce products as they collide is B.

Learn more about chemical reaction.

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Answer:

d. changing refractive index of gases in the atmosphere

Explanation:

light from a star passes through the atmosphere to reach our eyes. however, the layers of gases in the atmosphere are in constant motion, so the light gets bent and appears to be flickering.

i hope this helps! :D

Answer:

A bomb that is dropped from a moving helicopter doesn't fall directly downward rather it follows the parabolic path as it were thrown horizontally from a height with certain initial velocity. Therefore, the bomb should be dropped from farther distance equal to the horizontal range before the helicopter reaches above the target.

Answer:

In terms of the light spectrum, blue is a primary color, which means that it is one of the base colors that exist in the universe and it cannot be created by combining different colors together. The primary pigment colors are cyan, magenta, and yellow. Cyan absorbs red, yellow absorbs blue, and magenta absorbs green.

Explanation:

Hope this helped Mark BRAINLEST!!!

Answer:

it's C a pull friction

Explanation:

because it's all said in the explained

Answer:

c. 20 amps.

just divide the watts by the volts