A ball is projected horizontally from the top of a hill with a velocity of 30m/s if it reaches the ground 5sec later the height of the hill is???

The two horizontal forces that are present as a car is pushed down the driveway are push and friction.

A force refers to that which produces or opposes motion. When force(s) is/are acting on a body, they either cause motion to occur or prevent motion from occurring. An example of a force which opposes motion is friction.

For a car being pushed along a driveway, the two possible horizontal forces that act on it are push which moves it forward and friction which resists its motion.

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Answer:

Push and friction

Explanation:

As per Newton's third law

Here the car is pushed so the force applied is pushing force

The opposition force is frictional force

Option D

Answer: Equilibrium is the state in which market supply and demand balance each other, and as a result prices become stable. The balancing effect of supply and demand results in a state of equilibrium.

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Answer:

C

Explanation:

because C should be the correct one

Explanation:

q= n e

6 × 10^-11 = n (1.6 × 10^-19)

n = 6×10^-11 / 1.6 × 10^-19

n= 3.75 × 10⁸ electrons

Answer:

A, B, C is the answer

Explanation:

A is cut off from all the other light, as well as B so it cant be either, that leaves us with B C and D, Since the 3rd answer is ABC that means your can put a light switch in all 3 of the location so at B and A there will be a light switch and at C there will be a light switch to activate D.

Answer:

with what? ..................

The frictional force opposes the forward motion of the crate. The coefficient of static friction is 0.2.

Using the formula;

Fa = - Ff + mgsinθ

but Ff = μsFN and N = mgcosθ

Hence;

Fa = mgsinθ - μsmgcosθ

μsmgcosθ = mgsinθ - Fa

μk =  mgsinθ - Fa/mgcosθ

μk =  coefficient of static friction = ?

Fa = horizontal force = 100N

m = mass = 30.6 kg

θ = angle = 30°

g = acceleration due to gravity = 10 m/s^2

Substituting values;

μk =  [(30.6 × 10) sin 30°] - 100 / (30.6 kg × 10) cos 30°

μk = 153 - 100/265

μk = 0.2

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Answer: section 2 and 4

Explanation:

I had this problem before and that was the answer.

Answer:

His average speed is 0.15 kilometer per minute or 2.5 meters per second.

Explanation:

average speed = distance/time

x = 3 km/20 minutes

x = 0.15

—

x = 3000 m/1200 s

x = 2.5

If a  student walks a distance of 3 km in 20 minutes then the average speed of the student would be 9 kilometers per hour.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to calculate the average speed of the student if a  student walks a distance of 3 km in 20 minutes.

The distance traveled in 20 min = 3 kilometers

The distance traveled in 60 min = 3 × 3

                                                      = 9 kilometers

Thus, If a  student walks a distance of 3 km in 20 minutes then the average speed of the student would be 9 kilometers per hour.

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Answer:

For the first picture the answer is A. and the second picture answer is also A

Explanation:

Answer:

Part 1

C. 10 Coulombs

Part 2

A. The strength of the magnet increased as the amount of current increased.

Explanation:

1. When a voltage is applied to these plates an electrical current flows charging up one plate with a positive charge with respect to the supply voltage and the other plate with an equal and opposite negative charge.

If the capacitors are connected by a conductor they must have equal potentials. If their charges are not +/- Q there will be a potential difference and charges will flow until they are +/- .

2. Based upon the results of the experiment which is graphed, an increase in current increases the number of paperclips picked up. The increase in current produced a stronger magnetic field from the electromagnet created. The ability to pick up paperclips testifies to the strength of the magnet and this strength is because of the current emitted to the coils which in turn magnetizes the nail

Answer and Explanation:

Water and power come from external sources is the answer.

Open systems are processes that interact with other systems other than itself, including the outside environment.

A washing machines needs to taken in water and power (external sources) for the machine/system to be able to function.

#teamtrees #PAW (Plant And Water)

I hope this helps!

Answer:

can u repost the question properly

Answer:

It's a fact

Explanation:

There are different types of sciences for every problem that could happen on earth

Answer:

copper wire

Explanation:

copper wire is a good conductor because it can pull electricity other than dry wood an the others

Answer:

25

Explanation:

(1 + 3 + 5 + 7 + 9) orbitals = 25 orbitals

Work= Distance × Force

15 metre × 20 N

300 Joule

Now ,

Power,

2 seconds = 300/2

150 watt

We know that

Unit of Work is Joule

Unit of Power is watt

So,

Work - 300 joule

Power= 150 watt

I don't know I can't read that sorry I mean don't understand

Answer:

the density of seawater is thousand kg

Explanation:

Answer :Glaciers cause erosion by abrasion and  

plucking

. The sediment deposited by glaciers is called till.

When a chunk of ice left behind by a receding glacier melts, the water stays in the kettle, forming a kettle lake.

Explanation:

I took the test

A) Glacier causes erosion by abrasion and plucking.  

B) The sediment deposited by glaciers is called a moraine.

C) When a chunk of ice remained behind by a receding glacier melts, the water stays in the kettle, forming a kettle lake.

Abrasion contains the wear, polishing, and scratching produced in the bedrock by the thicker rock fragments brought by the ice, and in that way, grooves are formed.

Plucking generally takes place when advancing ice will push against fractured bedrock. Additional breaks can produce stress, while warmer temperatures and friction from glacier movement can bring the melting.

Moraine is the deposit of trawls of material fragmented by glaciers, which create mountain ranges because of their accumulation.

Glaciers are contacted by ice deposits due to continental glaciation. These forms develop with the glacier outwash and leave ice deposits. It generates a kettle lake when a large chunk of ice left a depression in the glacial drift when the ice melts a kettle-like hole is formed.

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Answer:

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Answer:

They contain genetic information needed to produce more viruses in the form of DNA or RNA.

Explanation:

Viruses are extremely small infectious agents that invade cells of all types. Once inside another cell, viruses become hijackers, using the cells' machinery to produce more viruses. Whether viruses constitute living organisms or merely conglomerations of molecules has been a source of debate for many years. One of the fundamental hallmarks of life is the ability to reproduce. Whether viruses have this ability is key to a debate over their status as living things. Some argue that since viruses cannot reproduce independently, they are not alive. However, similar to viruses, there are a few prokaryotes that are obligate parasites and cannot reproduce without a host. But these prokaryotes show another hallmark of life that viruses lack: growth. Once assembled, a virus does not change in size or chemical composition. They lack the machinery for producing energy to drive such biological processes. This makes them radically different from any known organism. Viruses do, however, show some characteristics of living things. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA. They evolve to adapt to their hosts. So while it is doubtful viruses are truly alive, they are clearly very similar to living organisms. There is more diversity among viruses than among all groups of living organisms combined. New varieties are constantly being described. It would be nearly impossible to describe all of the groups of viruses and their characteristics briefly. Instead, we will look at the characteristics shared by all viruses, such as their basic structure and general replicative cycle. Then we will discuss the features used to classify new viruses, such as shape and form of genetic material.

Answer:

cell-based life.

Explanation:

Still, viruses have some important features in common with cell-based life. For instance, they have nucleic acid genomes based on the same genetic code that's used in your cells (and the cells of all living creatures). Also, like cell-based life, viruses have genetic variation and can evolve

Answer:

Virtually all the mass of an atom resides in its nucleus, according to Chemistry

Explanation:

Answer: Acceleration = Force/Mass

Explanation:

F = ma

a = F/m

Acceleration = Force/Mass

Answer: #2

Explanation:

Vectors are described by both magnitude and direction

Answer:

B

Explanation:

Correct Answer: B — 8.20 seconds

Explanation: Assuming no spin, the flight of a golf ball is symmetrical; it takes the same amount of time to go up as it takes to come down. Since it took 4.10 seconds to rise to the top of it's trajectory, it will take another 4.10 seconds to descend, for a total hang time of 8.20 seconds.

Answer:

2

Explanation:

Answer:

Explanation:

Hope this helps :)  

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And have an amazing day <3

Answer:

I believe you are asking a true or false question, which in that case means the answer is false.

Explanation:

You should always swim in areas patrolled by lifeguards. Even if you're a strong swimmer you can have accidents in the ocean. Lifeguards are there to take care of you in case of an emergency.

Answer: False

Explanation: Edg 2021

Answer:

B

Explanation:

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We know that,

Mass of skier is 25 kg