PLEASE HELP ME!!!!!!!!!!!!

Velocity is defined as rate of change of displacement wit respect to time.

tangential velocity is  (11/10)πr , where r is radius of circular track.

Since, tangential velocity is,  [tex]=\frac{distance}{time}[/tex]

In one revolution, distance travelled is circumference of circular track.

If radius of circular track is r , then distance travelled in one revolution is, = 2πr  

So, 11 revolutions = 11(2πr) = 22πr

Time taken = 20 second

So, tangential velocity = 22πr/20 = (11/10)πr  meter per second.

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Answer:

20Kilowatt

Explanation:

Power is the rate of work done per time. It can be calculated using the formula:

Power = Energy/time

Energy = mass × acceleration due to gravity × height ÷ time

Power = mgh/t

Where;

m = mass (1000kg)

g = acceleration due to gravity (10m/s²)

h = height (10m)

t = time (s)

Power = 1000 × 10 × 10 ÷ 5

Power = 20000 watt

In kilowatt = 1000watt, the power is:

20Kilowatt or 20Kw

Answer:

protistia

Explanation:

Answer:

I think It's induced magnet

Explanation:

Because a magnet and non magnet can be chicken nuggets

If a magnet causes the atoms in a non-magnetic metal to line up and act like a magnet, the non magnet is said to be an induced magnet by the magnetic induction by a permanent magnet.

A permanent magnet is made of ferromagnetic materials which are having permanent magnetic properties. The magnetic field lines from permanent magnet always align with an applied magnet.

As in the case of dipole molecules capable of inducing a polarity to a nonpolar molecule, a magnetic field by a strong magnet can induce a magnetic property to a nonmagnet.

The induced magnetic field only reside in the object as long as the induction source is there. For example the a rotating electric filed causes magnetic moment in a nonmagnet.

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Answer:

either its 12 or 0.402

Explanation:

Answer:

Hydraulic systems work by using pressurized fluid to power an engine. These hydraulic presses put pressure on a small amount of fluid in order to generate a large amount of power. That pressure forces it against a piston on the other side of the container.

Answer:

1.Sea breeze

2. False

3.

a)Gold nugget

b)Silica sand

Explanation:

1.

The movement of air / wind blowing from the sea to the land is called sea breeze. This occurs due to high temperature differences between the water body and the land. The land is at its maximum heating, causing low pressure zones. High pressure zones in the adjacent water body causes the air to from from the sea to the land to occupy the zones of low pressures created.

2.

Air blows from areas with high pressures to those with low pressures. When an area experiences high temperatures, it causes the environment to have low pressure, creating voids , which are empty spaces that require to be filled. Additionally, the high temperatures heat the air around to cause it to rise creating the voids. Due to low pressure created, air from high pressure zones move in to occupy these zones. Hence air flows from areas with high air pressures to those with low pressures.

3.The ore for Gold is Gold nugget where as that for silicon is silica sand.

Answer:

the solid steel ball...more mass more weight more gravity

Explanation:

Answer:

Solid steel ball. It has more mass therefore more force will be acting on it.

Explanation:

Answer: This is the graph we are supposed to fill out.

Explanation:

Answer:

Explanation:

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

force = mass × acceleration

From the question we have

force = 438 × 2.55

We have the final answer as

Hope this helps you

Answer:

true matter takes up space and is anything that is around us

Answer:

A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs.

Explanation:

Answer:

D. Increases from pole to equator

Explanation:

I majored in Science

Answer:

Well it'll change our way of knowledge and more than likely, labor type of jobs that need people will no longer need them, as they don't get hurt, you don't have to pay them or anything like a human being. We'll probably have school online, our shopping online. It'll be a both good and bad thing for us.

Explanation:

Answer:

450 g =0.9921 lb

Explanation:

Answer:

The water hits the wall at a height of 5.38 m

Explanation:

Projectile Motion

It's the type of motion that experiences an object projected near the Earth's surface and moves along a curved path exclusively under the action of gravity.

The object describes a parabolic path given by the equation:

[tex]{\displaystyle y=\tan(\theta )\cdot x-{\frac {g}{2v_{0}^{2}\cos ^{2}\theta }}\cdot x^{2}}[/tex]

Where:

y   = vertical displacement

x   = horizontal displacement

θ   = Elevation angle

vo = Initial speed

The hose projects a water current upwards at an angle of θ=40° at a speed vo=20 m/s.

The height at which the water hits a wall located at x=8 m from the hose is:

[tex]{\displaystyle y=\tan40^\circ\cdot 8-{\frac {9.8}{2*20^{2}\cos ^{2}40^\circ }}\cdot 8^{2}}[/tex]

Calculating:

y = 5.38 m

The water hits the wall at a height of 5.38 m

Answer:

B

Explanation:

I hope this helps!!! <3

Answer:

B.......

Explanation:

Hope this helped

Answer:

Friction is a force that opposes motion.

Answer:

0.1 L

Explanation:

From the question given above, we obtained the following data:

Initial volume (V₁) = 0.05 L

Initial Pressure (P₁) = 207 KPa

Final pressure (P₂) = 101 KPa

Final volume (V₂) =?

We can obtain the new volume (i.e the final volume) of the gas by using the Boyle's law equation as illustrated below:

P₁V₁ = P₂V₂

207 × 0.05 = 101 × V₂

10.35 = 101 × V₂

Divide both side by 101

V₂ = 10.35 / 101

V₂ = 0.1 L

Thus, the new volume of the gas is 0.1 L

Answer:

I searched it up:

Explanation:

"Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements"

Hope this helps ∞<3

Answer:

3hrs is the answer

Explanation:

time=d/t

t=15/5 hrs

t=3 hrs

Answer:

1. 12 g/cm³

2. 0.5 m

Explanation:

1.

The weight of the gold is 240 g

The volume is 20 cm³

Density = Mass/ volume

Density = 240 / 20 = 12 g/cm³

2.

The formula for moment of a force is ;

Force * distance perpendicular  between force and the turning point of force

Given that the moment of force is 12.5 Nm and force is 25 N  then the perpendicular distance between the force and the turning point will be;

12.5 = 25 * d

12.5/25 = d

0.5 = d

d= 0.5 m

Answer:

v₀ = 3.77 [m/s]

Explanation:

This problem can be solved in a simple way by means of the following equation of kinematics.

[tex]y=y_{o}+v_{o}*t+\frac{1}{2}*g*t^{2}[/tex]

where:

y - yo = 0.441 [m]

Vo = initial velocity [m/s]

g = gravity acceleration = 9.81 [m/s²]

t = time = 0.625 [s]

[tex]0.441 = v_{o}*(0.625)-\frac{1}{2} *9.81*(0.625)^{2} \\2.357 = v_{o}*0.625\\v_{o}=3.77[m/s][/tex]

Note: The sign of the acceleration is negative since the movement of the basketball player is against of the gravity acceleration.

Answer:

Nanomagnetic chips.

Explanation:

In a computer, the hard disk drive chips are magnetic.

A non-volatile data storage device is a computer hard disk drive (HDD). Non-volatile storage devices are those that retain data even after being turned off. HDDs are merely one form of storage device, yet they are required by all computers.

Desktop computers, mobile phones, consumer gadgets, and enterprise storage arrays in data centers are frequently equipped with HDDs. They can use magnetic disks to store operating systems, applications, and other things.

Hence, Hard disk drive is belongs to one of those chips which at magnetic in nature.

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Answer:

Explanation:

The formula for weight goes- Weight=Mass*Gravity

We need to re arrange the formula in order to find the mass

so, mass=w/g

~If the person is on Earth then we can substitue the official the value of gravity as 9.8m/s^2 (this value is fixed)

~ The weight given in this question is 7,056 kN , but we need the weight to be in Newtons for the formula to acc work. So converting  7,056 kN to newtons would give 7056000N. (Newton = Kilonewton * 1000)

Now all we need to do is compute these values-

M=  7056000/9.8

M=720000kg

Well, thats the ans

Answer:

x=45.92m

Explanation:

It's a pretty simple suvat linear projectile motion question, using the following equation and plugging in your values it's a pretty trivial calculation.

V^2=U^2+2*a*x

V=0 (as it is at max height)

U=30ms^-1 (initial speed)

a=-g /-9.8ms^-2 (as it is moving against gravity)

x is the variable you want to calculate (height)

0=30^2+2*(-9.8)*x

x=-30^2/2*-9.8

x=45.92m

With these questions it's best to just memorise the suvat equations and either draw or imagine the actions involved, that was you can tell what piece of given information translates to which variable. For example; I know that I am looking for max height, so when a ball is at its highest point, it can't be moving up anymore (thus V = 0). I also know that it is moving upwards against gravity, so gravity will be decelerating the ball (therefore a=-g). In a paper, it may as for assumptions with this question, a good answer would be no air resistance or movement due to any other external forces. I hope I helped :)

Answer:

By applying the law of conservation of energy, we can write the following equation.

Gain in potential energy =loss in kinetic energy.

mgh = 1/2(mu^2)

Where, the symbols represent usual quantities.

Hence, h = u^2/2g = 30^2/2x10 = 900/20

= 45 m

Hence, the maximum height attained is 45 m.

Alternative method:

v^2 = u^2 +2gh

0 = 30^2 +2(-10)h, at the highest point v=0

20h = 900

h = 900/20 = 45 m