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rusak2 [61]
3 years ago
15

What is similar and different about ionic and covalent bonds?

Physics
1 answer:
12345 [234]3 years ago
8 0
The similarity is that they both are types of bonds in molecules.
Ionic bonds are between a metal and a nonmetal.
Covalent bonds are between two nonmetals.
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A. microscopes !!!!!!!!!!
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2 years ago
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A Red Rider bb gun uses the energy in a compressed spring to provide the kinetic energy for propelling a small pellet of mass 0.
Kay [80]

Answer:

a.6.5025 J

b.6.5025 J

Explanation:

We are given that

Mass of pellet,m=0.27 g=0.27\times 10^{-3} kg

1 kg=1000 g

Spring constant,k=1800 N/m

x=8.5 cm=8.5\times 10^{-2} m

1m=100 cm

a.Potential energy stored in the compressed spring  is given by

P.E=\frac{1}{2}kx^2

P.E=\frac{1}{2}(1800)(8.5\times 10^{-2})^2

P.E=6.5025 J

b.By using law of conservation of energy

P.E of spring=K.E of the pellet

K.E of the pellet=6.5025 J

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3 years ago
When θ= 0 ̊, the assembly is held at rest, and the torsional spring is untwisted. if the assembly is released and falls downward
Georgia [21]
Rod is 450mm and disk has a radius of 75mm So there is a pin holding the assembly upwards which is when Θ=0 and at the pin there is a torsional spring with constant of k=20N m/rad. One end of the rod is attached to the pin and the other is attached to the disk.


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3 years ago
What causes the acceleration to increase or decrease?
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The amount of velocity and time in an object causes acceleration to increase or decrease.
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3 years ago
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If one of the masses of the Atwood's machine below is 2.9 kg, what should be the other mass so that the displacement of either m
Afina-wow [57]

Answer:

2.59 Kg, 3.25 Kg

Explanation:

Acceleration can be found using equation

s=0.5at^{2} where s is the release distance, a is acceleration and t is time

Making a the subject of the formula

a=\frac {2S}{t^{2}}

Substituting 0.28 for s and time for 1 second

a=\frac {2*0.28m}{(1s)^{2}=0.56 m/s^{2}

Acceleration formula for the Atwood machine is given by

a=\frac {g(m1-m2)}{m1+m2}  where m1 and m2 are first and second masses respectively

Two situations are possible

When m1>m2

Assuming m1 is 3.7kg which is heavier than m2

Substituting a for 0.56 m/s^{2}  and m1 as 2.9Kg and taking acceleration due to gravity as 9.81 m/s^{2}  

0.56 m/s^{2}=\frac {9.81 m/s^{2}*(2.9Kg-m2)}{2.9Kg+m2}  

(0.56 m/s^{2})*(2.9Kg+m2)=9.81(2.9Kg-m2)  

(0.56 m/s^{2}+9.81)*m2=(9.81*2.9)-(2.9*0.56)  

10.37m2=28.449-1.624

10.37m2=26.825

m2=\frac {26.825}{10.37}=2.5867888138  

m2=2.59 Kg

<u>When m1<m2</u>

a=\frac {g(m2-m1)}{m1+m2}  

Then m1=2.9Kg hence

0.56 m/s^{2}=\frac {9.81(m2-2.9Kg)}{2.9Kg+m2}

(0.56 m/s^{2})*(2.9Kg+m2)=9.81 m/s^{2}*(m2-2.9Kg)

(0.56 m/s^{2}-9.81 m/s^{2})*m2=(-2.9 Kg*9.81 m/s^{2})-(2.9 Kg*0.56 m/s^{2})  

-9.25m2=-28.449-1.624=-30.073

9.25m2=30.073

m2=\frac {30.073}{9.25}=3.2511351351

m2=3.25 Kg

8 0
3 years ago
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