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3 years ago

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Physics

1 answer:

densk [106]3 years ago

3 0

Answer:

Energy=3.1times 10^-17 J

Rest mass: 6.2 kg

Speed: 47.5 m/s

Wavelength: 2.659 times 10^-6

Momentum: 67.3 kg(m/s)

Explanation:

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A mass is bobbing up and down on a spring. If you increase the amplitude of the motion, how does this affect the time for one os

NikAS [45]

Answer:

It will not change

Explanation:

The period of oscillation of a mass-spring system is given by

$T=2\pi \sqrt{\frac{m}{k}}$

where

T is the period

m is the mass hanging on the spring

k is the spring constant

As we see from the formula, the period of oscillation does not depend on the amplitude of the motion: therefore, if we change the amplitude, the time for one oscillation will not change.

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3 years ago

A uniform disk with a mass of 5.0 kg and diameter 30 cm rotates on a frictionless fixed axis through its center and perpendicula

Marina86 [1]

Answer: $\alpha =10.66 rad/s^2$

Explanation:

Given

mass of disk $m=5 kg$

diameter of disc $d=30 cm$

Force applied $F=4 N$

Now this force will Produce a torque of magnitude

$T=F\cdot r$

$T=4\dot 0.15$

$T=0.6 N-m$

And Torque is given Product of moment of inertia and angular acceleration $(\alpha )$

$T=I\cdot \alpha$

Moment of inertia for Disc $I= \frac{Mr^2}{2}$

$I=0.05625 kg-m^2$

$0.6=0.05625\cdot \alpha$

$\alpha =10.66 rad/s^2$

3 0

2 years ago

A 2.0-kg block sliding on a rough surface is attached to one end of a horizontal spring (k = 200 N/m) which has its other end fi

earnstyle [38]

Answer:

The speed is 3.87 m/s

Explanation:

The total work is equal to the change to kinetic energy:

Wtotal = ΔEk

Wspring + Wfriction = Ekf - Eki

Eki = 0

$-(\frac{1}{2} kd^{2} )-(fk*m*g*d^{2} )=\frac{1}{2} m(v^{2} -v_{i} ^{2} )$

Where

k = 200 N/m

d = 10 cm = 0.1 m

fk = 0.15

m = 2 kg

g = 9.8 m/s²

vi = 4 m/s

Replacing and clearing v:

$-(\frac{1}{2} *200*0.1^{2} )-(0.15*2*9.8*0.1^{2} )=\frac{1}{2} *2*(v^{2} -4^{2} )\\-1-0.0294=v^{2} -16\\v=\sqrt{-1-0.0294+16} =3.87m/s$

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2 years ago

The effect of a catalyst on a chemical reaction is to provide a new reaction pathway that results in a different

BabaBlast [244]

Answer:

Activation energy

Explanation:

Catalysts are organic substances that speeds up the rate of a chemical reaction.

Catalysts employs the mechanism of lowering the activation energy of the reaction. The lowered activation energy then makes the particles of the reactants to collide faster which makes the reaction happen fast.

Catalysts provide a new reaction pathway that results in a new and lowered activation energy.

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3 years ago

Consider a bathtub filled with water, with a plug in the drain. How long would this be considered a closed system? A. a few s

MatroZZZ [7]

Is this a trick question?

 . . a closed system doesn't exchange any matter with its surroundings and isn't subject to any external force, it is essentially an isolated system.

In the case of a bathtub, it is open immediately to evaporation, so the truth is this system is never closed

the correct answer is E.) none of the above

3 0

3 years ago

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