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3 years ago

The core muscles stabilize and protect the spine.

Physics

2 answers:

Aleksandr [31]3 years ago

4 0

True. yes the core muscles stabilize and protect the spine.

zhenek [66]3 years ago

3 0

the answer will be true

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Which of the following statements are true and supported by kinetic molecular theory?

Margarita [4]

Answer:

I,II, III are true

Explanation:

1. Yes

low pressure reduces the inter molecular attraction force and cause non-ideality

at high temperature frequency of collision is increase that causes loss of energy.

2. yes

$v_{rms}=\sqrt{\frac{2RT}{M} }$

T is temperature , more the T more will be the velocity of molecules and hence more kinetic energy.

3. Yes

Polar gases contain stronger inter molecular forces from reliable, measurable partial charges, which implies that they are more permanent, long-lasting, and therefore more prominent forces.

4. No

higher the temperature higher will be the pressure as the frequency of collision will increase and thus increasing the pressure.

6 0

4 years ago

Objects 1 and 2 attract each other with a electrostatic force

daser333 [38]

Electrostatic force changes like the inverse square of the distance (just like gravity).

If you double the distance, you change the force to 1/4 of what it used to be.

After the move, Objects 1 and 2 attract each other with a force of (18/16) = 1.125 units .

6 0

3 years ago

Read 2 more answers

Find the magnitude of the electrostatic force between a Na+ ion and a Cl− ion separated by 0.46 nm. N (b) Would the answer chang

adell [148]

Answer:

electrostatic force = 1.08 × $10^{-9}$ N

and if sodium ion replace by Li+ and chloride by Br− then there will be no change in electrostatic force

magnitude of electrostatic force will be same

Explanation:

given data

separation d = 0.46 nm = 4.6 × $10^{-10}$ m

to find out

electrostatic force between Na+ and Cl− ion

and if sodium ion replace by Li+ and chloride by Br−

solution

we know electrostatic force formula that is

electrostatic force = K ×Q1×Q2 / d² .........................1

here k is coulombs constant that is = 9 × $10^{9}$ and Q1 and Q2 is

charge that is Q1 = + 1.6 × $10^{-19}$ C

and Q2 = - 1.6 × $10^{-19}$ C

so put all these value in equation 1

electrostatic force = K ×Q1×Q2 / d²

electrostatic force = 9 × $10^{9}$ ×1.6 × $10^{-19}$ × -1.6 × $10^{-19}$ / (4.6 × $10^{-10}$ )²

so electrostatic force = 1.08 × $10^{-9}$ N

and if sodium ion replace by Li+ and chloride by Br− then there will be no change in electrostatic force

so magnitude of electrostatic force will be same

3 0

4 years ago

If a car takes a banked curve at less than a given speed, friction is needed to keep it from sliding toward the inside of the cu

zubka84 [21]

Answer:

minimum speed is 15.35 m/s

frictional coefficient is 0.26

Explanation:

given data

radius = 84 m

angle = 16°

speed = 16 km/h = 4.43 m/s

to find out

minimum speed and minimum coefficient

solution

we will apply here formula for velocity that is

velocity² = radius × g × tanθ

v² = 84 × 9.8 × tan16

v² = 236.04

v = 15.35 m/s

and

we find first friction force here

friction force 1 = m v² /r

friction force 1 = m (15.35)² / 84 = 2.80 m

and

friction force 2 = m v² /r

friction force 2 = m (4.43)² / 84 = 0.245 m

so total friction force = f1 - f2

total friction force = 2.80 - 0.245 = 2.55 m

so frictional coefficient = friction force /g

frictional coefficient = 2.55 / 9.8

so frictional coefficient is 0.26

4 0

3 years ago

Read 2 more answers

Which type of reaction is shown here? 2KClO3 + heat —> 2KCl + 302 endothermic reaction exothermic reaction

melamori03 [73]

The answer is "A" Endothermic. Hope that helped :)

7 0

3 years ago