An object of mass 30 kg is falling in air and experiences a force due to air resistance of 50 newtons. Determine the net force acting on the object:

Answer:

A. Liquid becomes a gas.

Answer:

A

Explanation:

Water changes to liquid because hydrogen bonds are constantly formed and broken as the water molecules slide past each other. The breaking of these bonds is caused by the motion (kinetic energy) of the water molecules due to the heat contained in the system.

Answer:

t = 8.82 minutes

Explanation:

The average speed of an object is given bu the total distance covered divided by total time taken.

The average speed of a kid is 6.8 mi/h

Let t is the time taken by this kid to run a mile, d = 1 mile

[tex]v=\dfrac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{1\ \text{miles}}{6.8\ \text{mi/h}}\\\\t=0.147\ \text{hour}[/tex]

or

t = 8.82 minutes

So, it will take 8.82 minutes to run a mile.

The  positive feedback influence the stability of a system is:  It can cause the system to remain stable as long as inputs are constant. Hence, option (A) is correct.

A body's capacity to return to its initial static equilibrium after being slightly shifted is referred to as stability.

A body in equilibrium doesn't suffer linear acceleration or a turning effect, and unless a force from the outside disturbs it, it will stay in that state forever. (The First Law of Newton)

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Answer:c

Explanation:got it wrong bc the other person didn’t know bc their small minded

Answer:

Because it is made by two different unit force (F) and displacement(s)

Answer:

[tex] \fbox{ \sf { \: Solid \: , \: Liquid \: and \:Gas}}[/tex]

Explanation:

[tex] \star[/tex] Let's learn about matter.

We see different kinds of things around us. Some of these are wood , book , salt , beaker , sugar , water , milk , oil, rubber and water vapour. All these things occupy space and have mass as they are matter. Anything that occupies space and has weight is called matter.

[tex] \star[/tex] States of Matter

Solid , liquid and gas are the three states of matter.

[tex] \hookrightarrow{ \text{ \underline{ Solid}}}[/tex]

Different things have different sizes and shapes but a particular thing has a fixed shape and size. The things which have definite size and definite shape are solids. Stone , word , ice , glass etc are some examples of solid.

[tex] \hookrightarrow{ \text{ \underline{ Liquid}}}[/tex]

The things having a definite volume but no definite shape of their own are called liquids. Water ,milk , petroleum , oil etc are as common examples of liquid.

[tex] \hookrightarrow{ \underline{ \text{Gas}}}[/tex]

The things which have neither a definite volume not a definite shape of their own are called gases. The bases take the shape and the size of the vessels in which they are enclosed. Air , smoke , water vapours , hydrogen gas are some examples of gases.

[tex] \sf{Hope \: I \: helped !}[/tex]

[tex] \sf{Best \: regards !!}[/tex]

~[tex] \text{TheAnimeGirl}[/tex]

D.

They don't have directions.

The quantities with only magnitude and no direction are called scalar quantities. Therefore, option D is the correct answer.  

Scalar quantities have only magnitude but vector quantities have both magnitude and direction. Some examples of scalar quantities are,

• Mass

• Temperature  

• Speed

• Density

Thus, we conclude that the quantities with only magnitude and no direction are scalar quantities. Hence option D is the correct pair.

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Answer:

Different classes of levers

Explanation:

The main difference between a pair of scissors and nailcutters is that they are different classes of levers. Scissors are made from two class 1 levers, meaning that the effort is exerted at one end and the load at the other with the fulcrum in the middle. This is because we press one end together (the handles) so we are applying the effort, and the other side closes from the fulcrum in the middle.

Nailcutters on the other hand, consist of two class 2 levers. This means that the fulcrum is on the opposite end to the effort with the load in the middle. This is because we press down on one side and the two parts move closer together.

Hope this helped!

Answer:

1.#potential energy = PE, m = mass in kg, g = force of gravity, h= vertical height above the ground.  ** means to the power of ie exponent. * means multiply.

PE = mgh

300 = m(10)(15)

m = 300/(10)(15)

m= 2kg

2. KE = 1/2 mv**2

     = 1/2(50)(50)**2

     = 2500 joules

Explanation

Is as in solution

Answer:

10 ohm

Explanation:

Since the resistors are arranged in series, their total resistance is their sum.

Hence, Total R = 2+3+5 = 10 ohm

The water. Take the specific heat of steel, estimate the volume of the nail, you know the volume of the water, which has a specific heat of one. Or be obvious. If you dropped a red hot nail into a liter of cold water, what would happen?

Answer:

Water

☆One litre boiling water has more amount of heat because it has much more greater mass than iron nail

I am not sure if its wrong,sorry

but here is the iron nail explanation also

☆A red hot nail has more amount of heat because the density of iron is more than that of water

Answer:

2.5 seconds.

Explanation:

Time equals speed divided by acceleration. gravitational acceleration is equal to 9.8 [tex]\frac{m}{s^{2} }[/tex]. You know that the speed is equal to 24.5 m/s, so plug those values into the equation.

24.5 / 9.8 = 2.5 seconds.

Hope this helps!

Answer:  2.5 s

Time=speed/acceleration

Gravitational Acceleration=9.8 m/s^2

Speed=24.5 m/s

Time=24.5/9.8=2.5 s

hopes this helps UwU

and if like my answer can you please mark me as brainliest please

thank you

and sorry it took so long i was trying to catch up with my missing assignments  

Answer:

c

Explanation:

though c is wider it has more water.

The answer is *C* Because The C Jar is Wider than others so it holds more water

Answer:

maintaining internal balance

Explanation:

this question is in biology not physics

Answer:

Symbol N

Explanation:

The SI unit of force is the newton, symbol N

The units of mass, length, and time are.

The combination is the unit of force, called the "Newton".

1 Newton is the force that accelerates 1 kilogram of mass at the rate of 1 meter per second every second.

Answer: its taking him 100s to run around the track once

Explanation:

Answer:

The noble gases are a group of chemical elements that make up Group 18 on the periodic table. These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity.

Answer:

D

Explanation:

Study habits include, how you prepare for assignments, what questions you ask your teacher, and How you take tests, all of these come under study habits, therefore the correct answer is option D.

The deliberate evidenced based quest and application of information and comprehension of the natural implications for society is what is known as research.

Science is a methodology of discovering more about the world.

People may contribute to the development of new knowledge through science and utilize it to promote their objectives.

A student's study habits include factors like how they approach tasks, questions they ask their professors, and how they prepare for the exam

Thus, the correct answer is option D.

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Answer:

W = 222 N.

Explanation:

The qiestion says" If the acceleration of gravity on the surface of the planet Mercury is 3.7 m / s2, then what would be the weight of a person with mass 60 kg on its surface? "

Mass of the person, m = 60 kg

The acceleration due to gravity on the surface of gravity is 3.7 m/s²

We need to find the weight of a person on the surface of Mercury.

Weight of an object is given by :

W = mg

So,

W = 60 kg × 3.7 m/s²

W = 222 N

Hence, the person will weigh 2222 N on the surface of Moon.

Answer:

precise

Explanation:

im pretty sure

Answer: It's D.

Explanation:

I just did it.

The system has parts that sense the amount of output, allows negative feedback to control a system. Option D is correct.

A system is a collection of interconnected or interacting pieces that follow a set of rules to produce a coherent whole.

The limits, structure, and purpose of a system, which is surrounded and impacted by its environment, are characterized and expressed in its functioning.

A feedback system helps the system to work in the productive way. Negative comments might help you get back on track. It allows you to view projects and activities in a new light.

It allows you to learn, grow, and improve anything from your own talents to the project you're working on right now.

The system has parts that sense the amount of output, allows negative feedback to control a system.

Hence, option D is correct.

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Answer:

It will maintain its state of motion

Explanation:

The object would maintain its state of motion.

If the size and direction of the forces acting on an object are exactly balanced, then there is no net force acting on the object and the object is said to be in equilibrium.

Equilibrium, in physics, the condition of a system when neither its state of motion nor its internal energy state tends to change with time.

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Answer:

90.4 m/s

Explanation:

Take down to be positive.  For objects in free fall, the acceleration is 9.8 m/s².

Given:

Δy = 354 m

v₀ = 35 m/s

a = 9.8 m/s²

Find:

v² = v₀² + 2aΔy

v² = (35 m/s)² + 2 (9.8 m/s²) (354 m)

v = 90.4 m/s

Answer:

epithelial, muscle, nervous, and connective tissues.

Explanation:

Answer:

A.) 4.81 seconds

B.) 44.6 m/s

Explanation:

He begins his dive by jumping up with a velocity of 5 (m/s).

Let us first calculate the maximum height reached by using third equation of motion

V^2 = U^2 - 2gH

At maximum height, V = 0

0 = 5^5 - 2 × 9.8H

19.6H = 25

H = 25 /19.6

H = 1.28 m

The time taken for the diver to reach the water from the maximum height can be calculated by using second equation of motion.

Where height h = 1.28 + 100 = 101.28 m

h = Ut + 1/2gt^2

As the diver drop from maximum height, U = 0

101.28 = 1/2 × 9.8 × t^2

4.9t^2 = 101.28

t^2 = 101.28/4.9

t^2 = 20.669

t = sqrt ( 20.669)

t = 4.55s

As the diver jumped up, the time taken to reach the maximum height will be

Time = 1.28 / 5 = 0.256

The time taken for him to hit the water below will be 0.256 + 4.55 = 4.81 seconds

B.) Velocity right before he hits the water will be

V^2 = U^2 + 2gH

But U = 0

V^2 = 2 × 9.8 × 101.28

V^2 = 1985.09

V = 44.6 m/s

A.) The time taken should be 4.81 seconds

B.) The velocity should be 44.6 m/s

Here we used third equation of motion

V^2 = U^2 - 2gH

At maximum height, V = 0

Now

0 = 5^5 - 2 × 9.8H

19.6H = 25

H = 25 /19.6

H = 1.28 m

Here the second equation of motion.

Here height h = 1.28 + 100 = 101.28 m

So,

h = Ut + 1/2gt^2

Since the diver drop from maximum height, U = 0

So,

101.28 = 1/2 × 9.8 × t^2

4.9t^2 = 101.28

t^2 = 101.28/4.9

t^2 = 20.669

t = sqrt ( 20.669)

t = 4.55s

Now

Time = 1.28 / 5 = 0.256

Finally the time should be

=  0.256 + 4.55

= 4.81 seconds

B.)

We know that

V^2 = U^2 + 2gH

But U = 0

So,

V^2 = 2 × 9.8 × 101.28

V^2 = 1985.09

V = 44.6 m/s

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Answer:

b) G.P.E = Mgh

300j = M x 10 m/s² x 15 m

300 j/ 10 m/s² x 15 m = M

300j/ 150 s² = M

2kg = M

c) K.E = 1/2 m v²

K.E = 1/2 (50) (50)²

K.E = 1/2 (50) (2500)

K.E= 125000/2

K.E = 625 000 J

Answer:

Structures that are tall or skinny are generally less stable, making them more likely to fall when exposed to lateral forces, whereas ones that are shorter or wider (at the base) are generally more steadfast.

Explanation:

Answer:

Explanation:

Let us calculate the time of flight first using the formula;

Velocity = Displacement/Time

Time = Displacement/speed

Time = 10.0/3

Time = 3.33secs

Next is to calculate how far out from the edge of the cliff it will hit the water. To get that, we will use the equation of motion;

S= ut+1/2gt²

u is the initial velocity = 0m/s

g is the acceleration due to gravity = 9.81m/s

S = 0 + 1/2(9.81)(3.33)²

S = 4.905*3.33*3.33

S = 54.39m

Hence it will hit the water at 54.39m from the edge of the cliff

Answer:

Explanation:

Applying kinematic relations along vertical direction

[tex]y = V_0t + \frac{1}{2}a_yt^2[/tex]

where,

[tex]a_y = g[/tex]

therefore,

[tex]y = 0 + \frac{1}{2}gt^2[/tex]

The time taken

[tex]t = \sqrt{\frac{2y}{g}}\\\\t = \sqrt{\frac{2*10}{9.8}}\\\\t = 1.428s[/tex]

The horizontal distance

[tex]x = V_yt\\\\x = 3*1.428\\\\x = 4.28m\\\\[/tex]

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Wavelength =(speed)/(frequency)

Wavelength =(20 m/s) / (20/s)

Wavelength = 1 meter