ANSWER PLEASEEEEE!!!!!

250kg

                                        would have momentum that is being caried by the impact of the trow                                                                                                                    

Answer:

Explanation:

open pipe :

In open pipe , wavelength of tone produced =  2L / n where n is integer .

3 lowest tone or highest wavelength  = 2L / 1 , 2L / 2 , 2L / 3

= 2L , L , 2L/3

Closed pipe :

In closed pipe , wavelength of tone produced =  4L / n where n is odd integer

3 lowest tone or highest wavelength  = 4L / 1 , 4L / 3 , 4L / 5

= 4L  , 4L / 3 , 4L / 5

Answer:

the net force on the car is 8,000 N.

Explanation:

Given;

mass of the car, m = 800 kg

motive force of the car, F = 10,000 N

frictional force experienced by the car, Fk = 2,000 N

The net force on the car is calculated as;

∑F = F - Fk

∑F = 10,000 - 2,000

∑F = 8,000 N

Therefore, the net force on the car is 8,000 N.

This question is incomplete, the complete question is;

A driver takes 3.5 s to react to a complex situation while driving at a speed of 60 mi/h.

How far does the vehicle travel before the driver initiates a physical response to the situation (i.e., putting his or her foot on the brake)

Answer:

the distance travelled by the vehicle, before the driver initiates a physical response is 308 ft

Explanation:    

Given that;

Reaction time t = 3.5 sec

Speed S = 60 mi/h

we convert mile to foot and hour to seconds

so

Speed S = 60 mi/h =  (60×5280)/(60×60) = 316800/3600 = 88 ft/sec

Now, The distance travelled by vehicle before the driver  initiates physical response is equal to Lag distance. i.e

Lag distance = V × t

we substitute

Lag distance = 88 ft/sec  3.5 sec

Lag distance = 308 ft

Therefore, the distance travelled by the vehicle, before the driver initiates a physical response is 308 ft

Answer:

find it yourself too lazy for math but here's the step

Explanation:

it's the object mass multiplied by the velocity.

This question is incomplete, the complete question is;

The two 60 cm in diameter cylinders in Figure 13.15, closed at one end, open at the other, are joined to form a single cylinder, then the air inside is removed.

a) How much force does the atmosphere exert on the flat end of each cylinder?

b) Suppose one cylinder is bolted to a sturdy ceiling. How many 81 kg football players would need to hang from the lower cylinder to pull the two cylinders apart ?

Answer:

a) the atmosphere exert a force of 2.9 × 10⁴ N on the flat end of each cylinder

b) 36 football players each of 81 kg are needed to pull the two cylinders apart.

Explanation:

Given that;

diameter of cylinder is 60 cm = 0.6 m

then radius r will be 0.6/2 = 0.3 m

a)

How much force does the atmosphere exert on the flat end of each cylinder;

we know that; F = PA

inside its the flats end that its in question; Area A = πr².

We Know that, Pressure P due to atmosphere is 1.013 × 10⁵ Pa

so, F = 1.013 × 10⁵ Pa × π( 0.3 )²

F = 1.013 × 10⁵ Pa × 0.09π

F =  28641.9 N ≈ 2.9 × 10⁴ N

Therefore, the atmosphere exert a force of 2.9 × 10⁴ N on the flat end of each cylinder.

b) number of players needed to pull the two cylinders apart.

given that; m = 81 kg and g is 9.8 m/s²

n = F / mg

we substitute

n = 28641.9 / (81 × 9.8)

n = 28641.9 / 793.8

n = 36.08 ≈ 36

Therefore, 36 football players each of 81 kg are needed to pull the two cylinders apart.

Answer:

Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, Earth science, and astronomy.

Answer:

[tex]Y_A=277.128 \angle 30v[/tex]

[tex]Y_B=277.128 \angle (-150)v[/tex]

[tex]Y_C=277.128 \angle (90)v[/tex]

Explanation:

From the question we are told that

Voltage [tex]V_L_L =480v[/tex]

Generally in a case of Y_connection [tex]V_p_ h[/tex] is mathematical represented as

[tex]V_p_h=\frac{V_l_l}{\sqrt{3}} \angle (\phi-30)v[/tex]

Generally voltage drop across phase A

[tex]Y_A=\frac{408}{\sqrt{3}} \angle -(0-30)[/tex]

[tex]Y_A=277.128 \angle 30v[/tex]

Generally voltage drop across phase B

[tex]Y_B=277.128 \angle (-30-120)[/tex]

[tex]Y_B=277.128 \angle (-150)v[/tex]

Generally voltage drop across phase C

[tex]Y_C=277.128 \angle (-30+120)[/tex]

[tex]Y_C=277.128 \angle (90)v[/tex]

Answer:

[tex]V_R=5.80mph(-\hat j )[/tex]

Explanation:

From the question we are told that

Speed of man [tex]V_m=3.30mph[/tex]

Speed of wind  [tex]V_w=-2.70mph[/tex]

Generally the Relative wind speed V_R is mathematically given directly as

   [tex]V_R=V_w-V_m[/tex]

   [tex]V_R=-2.7-3.30[/tex]

   [tex]V_R=-5.80mph[/tex]

Therefore the relative wind speed will the person sense

   [tex]V_R=5.80mph(-\hat j )[/tex]

Answer:

5 m/s

Explanation:

Total distance = 300 + 100 = 400m

Total time = 60 + 20 = 80s

Velocity = 400/80 = 5m/s

Average velocity of man is 5 meter per second.

To find the average speed of an object we divide the total distance travelled by the total time time taken by object.

Total distance travelled by man = 300 + 100 = 400 m

Total time taken by man = 60 + 20 = 80 seconds

Average velocity,[tex]=\frac{400}{80} =5m/s[/tex]

Thus, Average velocity of man is 5 meter per second.

Learn more:

https://brainly.com/question/23856383

Answer:

The most likely answer is option C: She lost body mass during the flight due to a decrease in metabolism.

Explanation:

There are different theories regarding this. One of fact is that astronauts drink and eat considerably less than normal during the first day of flight (probably due to sickness before adaptation). It is thought that their bodies adapt to the changes in accelerations they suffer during the trip and in space.

Answer:

G. 6125

Explanation:

Step one:

given data

mass m=  2.5x10-3 kg

velocity v= 7000 m/s

Required

The kinetic energy

Step two:

The expression for the kinetic energy is

KE= 1/2m v^2

KE= 1/2*2.5x10^-3*7000^2

KE= 0.5*2.5x10^-3*7000^2

KE= 0.5*2.5x10^-3*49000000

KE= 0.5*122500

KE=6125J

Answer:

C

Explanation:

Answer:

the answer to this question is D

Explanation:

hope its helps

have a great day

Answer:

Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

Through nuclear fusion, the sun is constantly using up the hydrogen in its core: Every second, the sun fuses around 620 million metric tons of hydrogen into helium. At this stage in the sun's life, its core is about 74% hydrogen.

Answer:

Explanation:

As we know that ,

P=F/A

Where P=12 lb/in²  and A= 0.2 in²

Putt in formula to get F ( weight of body)

F=12*0.2

F=2.4 Ib

Question:

A high ____will have a short wavelength

Answer:

That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength. Light waves have very, very short wavelengths

Explanation:

Hope it help

Explanation:

Wave Is The Answer

HighWave

Answer:

D. The air we breathe is a homogeneous mixture because it has substances but the same appearance throughout.

Explanation:

The air we breathe is a homogeneous mixture.

Air is a mixture of many gases. A homogeneous mixture is one whose constituents exists in one phase.

Air is a gas - gas mixtures.

A mixture has indefinite composition. They consist of two or more elements and or compounds in any proportion by mass.

Constituents retain their identities i.e. physical properties are retained.

Answer:

The Answer is D

Explanation:

Hope this helps!!!

Answer:

Increasing the force acting on an object will increase its acceleration

Explanation:

The force acting on an object is given by the formula as follows :

F = ma

Where

m is mass and a is acceleration of the object

It can be seen that the force and the acceleration are directly proportional to each other.

It means if we increase the acceleration of the object, the force will increase and vice versa.

Hence, the correct option is (c) "Increasing the force acting on an object will increase its acceleration".

Answer:

i think Increasing the force acting on an object will increase its acceleration

Explanation:

Answer:

The centripetal acceleration of the child at the bottom of the swing is 15.04 m/s².

Explanation:

The centripetal acceleration is given by:

[tex] a_{c} = \frac{v^{2}}{r} [/tex]

Where:

[tex] v^{2}[/tex]: is the tangential speed = 9.50 m/s

r: is the distance = 6.00 m

Hence, the centripetal acceleration is:

[tex] a_{c} = \frac{v^{2}}{r} = \frac{(9.50 m/s)^{2}}{6.00 m} = 15.04 m/s^{2} [/tex]

Therefore, the centripetal acceleration of the child at the bottom of the swing is 15.04 m/s².

I hope it helps you!

Answer:

10.8n

Explanation:

For this case the centripetal force is given by:

Where,

m: mass of the object

v: tangential speed

r: rope radius

Substituting values in the equation we have:

Then, doing the corresponding calculations:

Answer:

The centripetal force exerted on the rope is:

Answer:

Wavelength

Explanation:

Velocity of a wave is given by

[tex]v=f\lambda[/tex]

where

[tex]f[/tex] = Frequency of wave = [tex]f=\dfrac{v}{\lambda}[/tex]

[tex]\lambda[/tex] = Wavelength of wave

We have the relation

[tex]f\propto \dfrac{1}{\lambda}[/tex]

Now, velocity of the wave in a given medium remains constant. So, if the frequency increases the wavelength must decrease in order to keep the velocity of the wave constant. Also if the frequency decreases the the wavelength increases.

Answer:

1. 75 N

2. 6.8351 N

3. 700 N

Explanation:

1. Determination of the weight of the bowling ball:

Mass (m) = 7.5 kg

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

Weight (W) =?

Weight = mass × acceleration due to gravity

W = m × g

W = 7.5 × 10

W = 75 N

2. Determination of the weight of the object.

Mass (m) = 683.51 g

Weight (W) =?

We'll begin by converting 683.51 g to kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

683.51 g = 683.51 g × 1 Kg / 1000 g

683.51 g = 0.68351 Kg

Thus, 683.51 g is equivalent to 0.68351 Kg.

Finally, we shall determine the weight of the object as follow:

Mass (m) = 0.68351 Kg

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

Weight (W) =?

Weight = mass × acceleration due to gravity

W = m × g

W = 0.68351 × 10

W = 6.8351 N

3. Determination of the weight of the KHS student.

Mass (m) = 154 lb

Weight (W) =?

We'll begin by converting 154 lb to Kg. This can be obtained as follow:

2.2 lb = 1 Kg

Therefore,

154 lb = 154 lb × 1 Kg / 2.2 lb

154 lb = 70 kg

Thus, 154 lb is equivalent to 70 kg.

Finally, we shall determine the weight of the KHS student as follow:

Mass (m) = 70 Kg

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

Weight (W) =?

Weight = mass × acceleration due to gravity

W = m × g

W = 70 × 10

W = 700 N

Answer:

High temperature of 108 million K

Explanation:

For the fusion reactor to be able to work optimally, then one of the most important conditions is the necessity of a very high temperature of about 108 million Kelvin. This is quite large, and is about six times hotter than the temperature existing at the core of the sun. At this temperature, the hydrogen state of the element is not a gas, but rather it is a plasma. Here, the atoms will be stripped of their electrons and are allowed to move freely. This condition is akin to the perfect condition for the reactor to function. It makes the hydrogen atoms gather enough energy for the reaction that takes place in the subsequent phases of this process.

Answer:

A, 1.25m/s^2

Explanation:

use formula v=v0+at to solve for a

a= v-v0/t

Plug in givens

30-15/12 to get 15/12 = 1.25m/s^2

Given :

A tourist drops (from rest) a ping pong ball from the top of the tower, which has a height of 174 meters.

To Find :

How long does it take for the ping pong ball to hit the ground ?

Solution :

We know, equation of motion of object doing free fall is :

[tex]s = ut + \dfrac{gt^2}{2}[/tex]           ....1)

Here, g = 9.8 m/s² ( acceleration due to gravity )

Also, u = 0 m/s ( its free fall )

Putting these values in equation 1), we get :

[tex]174 = 0 + \dfrac{9.8\times t^2}{2}\\\\t = \sqrt{\dfrac{174\times 2}{9.8} }\ s\\\\t = 5.96 \ s[/tex]

Therefore, ball will take 5.96 s to hit the ground.