Why does a ball not bounce back up to its original height?

Answer:

[tex]u = 4.56m/s[/tex]

[tex]T = 0.94s[/tex]

Explanation:

See comment for complete question

Given

[tex]h = 106cm[/tex] --- Height

Solving (a): The initial speed

To do this, we make use of the third equation of motion

[tex]v^2=u^2+2ah[/tex]

In this case:

[tex]v = 0m/s[/tex] --- final velocity at the maximum height

[tex]a = -g = -9.8m/s^2[/tex]

[tex]h = 106cm[/tex]

Convert height to metres

[tex]h = 1.06m[/tex]

Substitute these values in [tex]v^2=u^2+2ah[/tex]

[tex]0^2 = u^2 +2 *(-9.8) * 1.06[/tex]

[tex]0^2 = u^2 -20.776[/tex]

Collect Like Terms

[tex]u^2 =20.776[/tex]

Take the positive square root of both sides

[tex]u =\sqrt{20.776[/tex]

[tex]u = 4.55806976691[/tex]

[tex]u = 4.56m/s[/tex] --- approximated

Hence, the initial velocity is 4.56m/s

Solving (b): Time spent in the air.

This will be solved using the first equation of motion.

[tex]v = u + at[/tex]

Where:

[tex]v = 0m/s[/tex] --- final velocity at the maximum height

[tex]a = -g = -9.8m/s^2[/tex]

[tex]u = 4.56m/s[/tex]

So, we have:

[tex]0 = 4.56 - 9.8t[/tex]

Collect Like Terms

[tex]9.8t = 4.56[/tex]

Make t the subject

[tex]t = \frac{4.56}{9.8}[/tex]

[tex]t = 0.46530612244[/tex]

[tex]t = 0.47s[/tex] --- approximated

The above is the time it reaches the maximum height.

The time it stays in the air is:

[tex]T = 2t[/tex]

This gives:

[tex]T = 2*0.47s[/tex]

[tex]T = 0.94s[/tex]

Answer:

1.Radio waves from using your TV.

2. microwaves you are in satellites.

3.UV light waves come from sunlight

4.x ray waves used at the doctors office

5. infrared waves are in remote controls when sending signals.

I don't know if I can think of another 5 right now. but I hope this helps.

Answer:

v = 0 and  a = 9.8 m/s²

Explanation:

When an object reaches the highest point, its velocity is equal to 0. After reaching the highest point, it starts to decelerate. The acceleration is in the downward direction and it is equal to g i.e. 9.8 m/s².

So, the velocity and acceleration of the ball at the highest point in its path is 0 and 9.8 m/s² downward.

Hence, the correct option is (d).

Answer:

insect B by 12m

Explanation:

30min = 1800s (times by 60)

5m/min x 30min = 150m

9cm/s x 1800s = 16,200cm = 162m

162m - 150m = 12m

Answer:

A. Ultraviolet

Answer: A.Ultraviolet

Explanation:

just did it

Answer:

blackbody

Explanation:

Answer:

It turns out that an object's kinetic energy increases as the square of its speed

Explanation:

A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph.

basiclly the faster the more impact it has when it suddenly stops or hit somthing

Answer:

2 watts

Explanation:

Explanation:

the speed of the motor can be increased by increasing the strength magnetic field increasing the current flowing through the coil.

Answer:

i d k ok

Explanation:

Answer:

there are just a bit over 1.6 km in a mile so 7.5*1.6=12. something so there is just a little bit more distance in 7.5 miles

Explanation:

Answer:

False

Explanation:

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Answer:

[tex]\mu =0.169704 Ns/m^2[/tex]

Explanation:

From the question we are told that

Area of plate[tex]a=1m^2[/tex]

Angle of inclination [tex]\theta=60 \textdegree[/tex]

Velocity [tex]v=0.75m/s[/tex]

Thickness of oil [tex]t=2mm[/tex]

Weight of plate [tex]w=90N[/tex]

Generally the equation for shear force is mathematically given by

[tex]F=mgsin45 \textdegree[/tex]

[tex]F=90sin45 \textdegree[/tex]

[tex]F=63.639N[/tex]

[tex]F=\mu* \frac{v}{t}[/tex]

[tex]F=\mu* \frac{0.75}{2*10^-^3}[/tex]

[tex]\mu* \frac{0.75}{2*10^-^3}=63.639N[/tex]

[tex]\mu =\frac{63.639}{375}[/tex]

Therefore viscosity is given by

[tex]\mu =0.169704 Ns/m^2[/tex]

Answer:

applied force since she is pushing the box

maybe, I'm not 100% sure

Answer:

changes in displacement

Explanation:

Answer:

When the compass is placed below the wire, and the electric current switched on, the needle deflects in the opposite direction. If an electric current is passed through a long coil of wire (a solenoid ) a magnetic field is produced which is the same shape as that of a bar magnet.

Explanation:

Answer:

a changing electric field creates a magnetic field.

Explanation:

if you have a circuit and you send AC current through (AC = Alternating current) so that the electrons move back and forth, they will create a changing electric field.

This produces a magnetic field (because that's what the universe does).

Answer:

Kinetic energy, form of energy that an object or a particle has by reason of its motion. ... Kinetic energy is a property of a moving object or particle and depends not only on its motion but also on its mass.

Credits to britannica.com

Explanation:

Hope this helps

Kinetic energy of an object is the energy that it possesses due to its motion.

Answer:

Earth’s gravitational force is stronger

Explanation:

Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in earth; on the flip side, the moon’s gravity is weaker than the earth due to smaller in size as compared to the earth. Earth gravity is denoted by g; conversely, moon gravity is denoted by gm

Answer: The greater an object's mass, the more gravitational force it exerts. So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. That's why the moon isn't pulled out of Earth's orbit by the gravity of larger planets or by the sun.

Explanation:

Answer:

2.34

Explanation:

Answer:

2.34

Explanation:

Hope this helps! :D

Answer:

wasts materials such as cans. it can hit space crafts and satellites. no one has ever been killed by space debris, space vessels very rarely are seriously damaged.

Gravity influenced the formation of the solar system, with the planets orbiting the sun.

Gravitational force is force of attraction between two masses. Gravitational force(F) between two bodies is directly proportion to the product of masses(m₁,m₂) of two bodies and inversely proportional to square of distance(r) between them. mathematically it is written as,

F [tex]\alpha[/tex] m₁.m₂

F [tex]\alpha[/tex] 1/r²

F = G m₁,m₂÷r²

where G is gravitational constant, whose value is 6.6743 × 10⁻¹¹ m³ kg-1s⁻².

Force is expressed in Newton N in SI unit. its dimensions are [M¹L¹T⁻²].

According to Kepler's first law of motion, every planet is moving in an elliptical orbit with sun has situated at one of the foci of the orbit.

when a planet moves in the orbit around the sun, it moves in a stable orbit. in this orbit , centripetal force is equal to centrifugal force, in this case centripetal force appears as gravitational force. Means Gravitational force between sun and planet balances the centrifugal force which is outwards. In such a way gravity influenced the formation of the solar system.

Hence gravity plays crucial role in the formation of solar system.

To know more about Gravity :

https://brainly.com/question/14874038

#SPJ3.

Answer:

[tex]\boxed {\boxed {\sf v= 0.08 \ km/min \ North}}[/tex]

Explanation:

Velocity is found by dividing the displacement by the time.

[tex]v=\frac{s}{t}[/tex]

where s is the displacement and t is the time.

The displacement is 1.6 kilometers, but it needs a direction as well. The question notes you walked North. The time is 20 minutes.

[tex]s= 1.6 \ km \ North \\t= 20 \ min[/tex]

[tex]v=\frac{1.6 \ km \ North} { 20 \ min}[/tex]

Divide.

[tex]v= 0.08 \ km/min \ North[/tex]

Velocity is a vector quantity, so that is why it has the measurement and the direction.

The average velocity is 0.08 kilometers per minute North.

Answer:

Are there no moderators here?

Who are moderators here?

Well, the above answer is correct..

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Answer:

It is 32.9

Explanation:

Answer:

20km/h

Explanation:

Given parameters:

Distance moved  = 24km

Time  = 1.2hrs

Unknown:

Speed of her ride  = ?

Solution:

Speed is the distance covered per unit of time.

So;

   Speed  = [tex]\frac{distance}{time}[/tex]  

 Speed  = [tex]\frac{24}{1.2}[/tex]    = 20km/h

Answer:

In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.