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3 years ago

The average kinetic energy of the particles in an object is

Physics

2 answers:

nalin [4]3 years ago

7 0

B. Heat temperature is a measure of the average kinetic energy.

yulyashka [42]3 years ago

7 0

Answer:

A. temperature

Explanation:

The average kinetic energy of the particles in an object is temperature.

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If pressurized air pressure is 350 kPa, atmospheric pressure is 100 kPa, initial atmospheric pressure is 100 kPa, initial accele

Travka [436]

Answer:

$d=8.657mm$

Explanation:

From the question we are told that

Pressurized air pressure is $P_{air}=350 kPa,$

Atmospheric pressure is $P_a=100 kPa$

Initial acceleration of the water rocket is $a_i=0.5g.$

Acceleration of the water rocket is $a_r=0.5g$

Mass of water is $M_w=0.5 kg$

Generally total mass is given mathematically given as

$T_M=0.5+0.5=>1kg$

Generally the tension on the rocket is given mathematically given as

$T=(P_{air}-P_a)A$

$T=(350-100) \frac{\pi d^2}{4}$

T is also

$T=\frac{3Mg}{2}$

Therefore

$T=>(350-100) \frac{\pi d^2}{4}= \frac{3Mg}{2}$

$T=>(350-100) \frac{\pi d^2}{4}= \frac{3*1*9.81}{2}$

$d^2= \frac{3*1*9.81*4}{2(350-100) \pi}$

$d=\sqrt{\frac{3*1*9.81*4}{2(350-100) \pi}}$

$d=8.657mm$

therefore diameter of nozzle is mathematically given as

$d=8.657mm$

8 0

3 years ago

When will an object accelerate in terms of force

GREYUIT [131]

Answer:

when an external force applied on an object

Explanation:

there will be a change in velocity this means it is accelerating

3 0

3 years ago

A lead ball is dropped 30 feet from a church tower. If the acceleration due to gravity is 9.8m s^-2, how long does it take the b

Alika [10]

final velocity of a falling object = 0

and acceleration of a falling object is negative

now using the expression ( Newton's 3rd equation of motion)

${v}^{2} = {u}^{2} - 2gs$

where the parameters have their usual meaning

making

${u}^{2} \: the \: subject$

thus

${u}^{2} = 2gs$

$u = \sqrt{2gs}$

from the question,

g= 9.8m/s^2

s = 30m

substitute them into the equation

$u = \sqrt{2(9.8 \times 30)}$

$u = \sqrt{588}$

u = 24.25m/s

but the question is demanding for time but not the initial velocity

so substitute them in the

Newton's first equation of motion

where

V = u - gt

but from the question,

v= 0 and the acceleration is negative because it's a free fall

substitute the values into the equation

0 = 24.24 -9.8t

making t the subject

9.8t = 22.24

dividing through by 9.8

9.8t/9.8 = 22.24/9.8

t = 2.3s . therefore, it would take 2.3s for the ball to hit the ground.

4 0

4 years ago

An engineer wants to set up simple password protection with no usernames for some switches in a lab, for the purpose of keeping

Andre45 [30]

Answer:

A. A login vty mode subcommand

Explanation:

since we are protecting co-workers from connecting to the switches from their desktop PCs, we would need a Telnet line which is used to connect to devices remotely from other network devices on the same network segment as the device we want to connect to. A login local vty subcommand configures a local username for login access but since our design constraint is to configure without usernames, option A is the correct answer.

8 0

4 years ago

Boat carrying people more than its capacity is attributes of sinking why

alisha [4.7K]

It will sink because of how much the max capacity a boat can have it will sink because it is over capacity that’s why it will sink.

Hope this helps :)

5 0

3 years ago

Read 2 more answers