If you took a balloon of gas and then warmed the balloon in a sunny window, what can now be said about the density of the gas in the balloon

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[tex]\boxed{\text{Her angular velocity decreases.}}[/tex]

Recall the conservation of angular momentum:

[tex]L_i = L_f\\\\I_iw_i = I_fw_f[/tex]

When this person extends her arms, her moment of inertia increases.

According to the conservation of angular momentum, if the moment of inertia increases, the angular velocity must DECREASE.

Silk,wool, DNA, cellulose and protein

Answer:

125N

Explanation:

force =mass×acceleration

50 =mass×8m/s2

mass=6.25kg

Answer:

No

Explanation:

The rate of diffusion defines the gas that passes through some area over the course of time.

Answer:

Journey A average speed is 19.86 meters per second

Journey B average speed is 13.68 meters per second

Explanation:

The average speed is defined as the distance divided by the time, so that's what we have to do. But first, let's convert the time in seconds and the distance in meters, because we have to answer in meters per second:

Journey A:

2 hours = 120 minutes. Each minute have 60 seconds, so 120•60= 7200 seconds.

143 km = 143000 meters

143000/7200 = 19.86 m/s

Journey B:

3 hours = 180 minutes + 15 minutes = 195 minutes

195•60 = 11700 seconds

160 km = 160000 meters

160000/11700 = 13.68 m/s

Answer:

C

Explanation:

Fusion and fission are similar in that they both release large amounts of energy. Nuclear fusion is a process in which two nuclei join to form a larger nucleus. Nuclear fission is a process in which a nucleus splits into two smaller nuclei.

Answer:   Our notation is as follows : the mass of the original body is M=20.0kg ; its initial velocity is  

ν

0

​

=(200m/s)  

i

^

 ; the mass of one fragment is m  

1

​

=10.0kg ; its velocity is  

ν

1

​

=(100m/s)  

j

^

​

 ; the mass of the second fragment is m  

2

​

=4.0kg ; its velocity is  

ν

2

​

=(−500m/s)  

i

^

 ; and , the mass of the third fragment is m  

3

​

=6.00kg . Conservation of linear momentum requires  

          M  

ν

0

​

=m  

1

​

ν

1

​

m  

2

​

ν

2

​

+m  

3

​

ν

3

​

 .  

The energy released in the explosion is equal to ΔK , the change in kinetic energy .  

(a) Using the above momentum -conservation equation leads to  

ν

3

​

=  

m  

3

​

M  

ν

0

​

−m  

1

​

ν

1

​

−m  

2

​

ν

2

​

​

             =  

6.00kg

(20.0kg)(200m/s)  

i

^

−(10.0kg)(100m/s)  

j

^

​

−(4.0kg)(−500m/s)  

i

^

​

          =(1.00×10  

3

m/s)  

i

^

−(0.167×10  

3

m/s)  

j

^

​

.  

The magnitude of  

ν

3

​

 is  

                        ν  

3

​

=  

(1000m/s)  

2

+(−167m/s)  

2

​

=1.01×10  

3

m/s  

It points at θ=tan  

−1

(−167/1000)=−9.48  

∘

 (that is at 9.5  

∘

 measured clockwise from the +x axis) .  

(b) The energy released is ΔK :  

             ΔK=K  

f

​

−K  

i

​

=(  

2

1

​

m  

1

​

ν  

1

2

​

+  

2

1

​

m  

2

​

ν  

2

2

​

+  

2

1

​

m  

3

​

ν  

3

2

​

)−  

2

1

​

Mν  

0

2

​

=3.23×10  

6

J

Explanation:

Answer:

Increase 9 times

Explanation:

(a) The normal force on the sleigh is 596.36 N.

(b) The magnitude and direction of acceleration of the sleigh is 3.2 m/s² upwards.

The given parameters;

The normal force on the sleigh is calculated as follows;

[tex]F_n = mg \times cos(\theta)\\\\F_n = 63 \times 9.8 \times cos(15)\\\\F_n = 596.36 \ N[/tex]

The magnitude and direction of acceleration of the sleigh is calculated as follows;

[tex]\Sigma F= ma\\\\F - mgsin(\theta) - F_f = ma\\\\F - mgsin(\theta) - \mu F_n = ma\\\\510\ - \ 63 \times 9.8 \times sin15 \ -\ 0.25\times 596.36 = 63a\\\\201 .11 = 63a\\\\a = \frac{201.11}{63} \\\\a = 3.2 \ m/s^2 \ upwards[/tex]

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Answer:

The water would rise because of displacement in the water

Explanation:

Inner-belt asteroids tend to be rich in SILICATE, whereas outer-belt asteroids tend to be rich in CARBON. An asteroid is a rocky object (much smaller than a planet), which orbits around the Sun.

The asteroids are composed of different elements (e.g., carbon, nitrogen, hydrogen, oxygen, silicate, etc).

The asteroid belt is a region in the Solar System, located between the orbits of Mars and Jupiter.

The size of the asteroids localized in the asteroid belt range from a few meters to almost 1000 kilometers (km) wide.  

Approximately half mass of the asteroid belt is composed of only four asteroids (i.e., Ceres, Vesta, Pallas, and Hygiea).

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guaranteeing freedom of speech, press, assembly, and exercise of religion

Answer:

For example, an earthquake of magnitude 5.5 releases about 32 times as much energy as an earthquake measuring 4.5. Another way to look at this is that it takes about 900 magnitude 4.5 earthquakes to equal the energy released in a single 6.5 earthquake.

Explanation:

Answer:

1.D 2.A 3.A 4.B 5.C 6.A 7.A 8.A

Explanation:

Answer:

Question one is: kinetic energy

Question two is: tin

Question three is: zinc

Question four is: compression stroke

Question five is: second law of thermodynamics

Question six is: Convection

Question seven is: refrigerater

Explanation:

The next page called use vocabulary

the answers:

Question twenty three is: Heat engine

Question twenty four is: Thermodynamics

Question twenty five is: solar collector

Question twenty six is: specific heat capacity

Question twenty seven is: a conductor

Question twenty eight is: it's total energy increasing

Question thrity is: internal combustion engine

Question thrity one is: Exhaust stroke

Question thrity two is: plastic

Question thrity three: I don't know this one sorry!

Question thrity four is: Temperature

Question thrity five is: Heat

Hope his helps!!! <3

Answer: An object weights 1000N on the earth's surface. ... Calculate its mass ... strength is 10 N/kg how many newtons does a 30kg object weigh.

Explanation:

Please find attached photographs for your answer.

Hope it helps.

Do comment if you have any query.

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

mass = 1100 kg

acceleration = 0.5 m/s²

We have

force = 1100 × 0.5 = 550

We have the final answer as

Hope this helps you

Answer:

If your filling in the blank on edge then its 550

Explanation:

Force of air and gravitational force are acting on the ball when launched from the slingshot.

When a ball is launched from a slingshot, during its travel force of air as well as gravitational force are acting on the ball because there is air which moves opposite to the motion of a ball whereas the force of gravity attracts the ball downward.

The force of air slows down the motion of the ball while on the other hand, the force of gravity brings the ball to the ground due to attraction. If these two forces are not present then the ball continues its motion forever so we can conclude that force of air and force of gravity are acting on the ball when launched from the slingshot.

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Answer:

[tex]W=Fd \\ 50 = 25d \\ d = \frac{50}{25} \\ \color{yellow} \boxed{d = 2m}[/tex]

Answer:

C. 0.2 m/s west

Explanation:

Dont ever open the links that bots send you, it is a virus..Trust me, i speak from experience.......

The number of heaters that can safely be operated in the circuit is 5 heaters.

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

Power of heater = 300 W

Voltage (V) = 110 V

Current (I) = 15 A

Voltage (V) = 110 V

Current (I) = 15 A

P = IV

P = 15 × 110

Thus, the power that can be drawn from the circuit is 1650 W

Power of heater = 300 W

Power of Circuit = 1650 W

[tex]Number \: of \: heaters \: = \frac{power \: of \: circuit}{power \: of \: heater} \\ \\ = \frac{1650}{300} \\ \\ = 5.5[/tex]

From the calculation made above, the number of heaters that can be operated safely in the circuit is 5 heaters.

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Answer:

15m²

8.6m²

lcm²

6000cm²

0.1km²

40cm²

5210 mm²

500m²

0.0087mm²

500cm²

Answer:

Having more plants performing photosynthesis could help reduce the amount of carbon dioxide in the atmosphere.

Explanation:

sample answer

The plants can be used in the future to help counteract some human

emissions they absorb carbon dioxide from the air and release oxygen.

It is a process carried out by photosynthetic autotrophic organisms, such as plants, algae and some prokaryotes. These organisms capture sunlight, convert it into chemical energy, which will be used to produce organic compounds, based on water and carbon dioxide.

Trees, like other plants, in the process called photosynthesis, absorb carbon dioxide from the air and release oxygen. They also make the air wetter and cooler. In this way, plants contribute to the good quality of the air we breathe.

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Answer:

scientists often prefer to measure mass rather than weight because weight is affected by gravity while mass is not. Mass is always the same.

Explanation:

Weight is a force rather than a measure of the amount of matter something contains. The same amount of matter can have different weights depending on where it is. Mass directly measures the amount of matter present and remains the same no matter where it's measured.

Answer:

6,000 minutes

Explanation:

To calculate distance u multiply speed and time or speed and rate

This question involves the concepts of centripetal force and centripetal acceleration.

a) The centripetal acceleration for the piece of gum stuck to the outside edge of the record will be "6.67 m/s²".

b) The gum will have to overcome "0.033 N" centripetal force to remain stuck to the vinyl.

a)

The centripetal acceleration of the gum can be found using the following formula:

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

where,

[tex]a_c[/tex] = centripetal acceleration = ?

v = linear speed of record = 1 m/s

r = radius of the record = [tex]\frac{diameter}{2}=\frac{0.3\ m}{2}=0.15\ m[/tex]

Therefore,

[tex]a_c=\frac{(1\ m/s)^2}{0.15\ m}\\\\a_c = 6.67\ m/s^2[/tex]

b)

Now, the centripetal force can be given as follows:

[tex]F_c=ma_c\\F_c=(0.005\ kg)(6.67\ m/s^2)\\F_c=0.033\ N[/tex]

Learn more about centripetal force here:

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The attached picture shows the centripetal force.