3 years ago

Which vector is the sum of the vectors shown below?

Physics

1 answer:

qaws [65]3 years ago

4 0

Where is the picture??

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Someone help pleaseeee

SSSSS [86.1K]

Answer:

C. resonating

an object being forced to vibrate at its natural frequency creates resonance

5 0

3 years ago

A mass of 150 g stretches a spring 1.568 cm. If the mass is set in motion from its equilibrium position with a downward velocity

nadezda [96]

Answer:

$u(t)=\frac{1}{5} sin\ (25t)$

Explanation:

Given:

mass of the body stretching the spring, $m=150\ g$

extension in spring, $\Delta x=1.568\ cm$

velocity of oscillation, $u'(0)=20\ cm.s^{-1}$

initial displacement position of equilibrium, $u(0)=0$

<u>According to given:</u>

$m.g=k.\Delta x$

$150\times 980=k\times 1.568$

$k=93750\ dyne.cm^{-1}$

<u>we know frequency:</u>

$\omega=\sqrt{\frac{k}{m} }$

$\omega=\sqrt{\frac{93750}{150} }$

$\omega=25$

Now, for position of mass in oscillation:

$u= A.sin\ (\omega.t)+B.cos\ (\omega.t)$

$u= A.sin\ (25.t)+B.cos\ (25.t)$

at $t=0;\ u(0)=0\ \Rightarrow A=0$

∴ $u(t)=B.sin\ (25.t)$

∵ at $t=0;\ u'(0)=20\ cm.s^{-1}\ \Rightarrow B=\frac{1}{5}$

$u(t)=\frac{1}{5} sin\ (25t)$

7 0

3 years ago

Explain what a coulomb is and be able to change from electron to coulomb and vice versa

torisob [31]

Answer:

Cuolomb is SI unit of charge

1 e=1.6022E-19 C

1 C = 6.2415E+18 e

Explanation:

Coulomb(C) is the SI unit for measuring electric charge and is given as the product of current and time. To convert Cuolomb to electron, we multiply each cuolomb of charge by 1 C = 6.2415E+18 e while to convert electron into charge, we multiply the electrons by 1e=1.6022E-19 C

4 0

3 years ago

The particles of an ice cube at 0°C (represented by the blue circles) come in contact with the particles of Juan’s hand at 37°C

dezoksy [38]

Answer:

its b

Explanation:

4 0

3 years ago

Read 2 more answers

A box weighing 4.0 N is lifted 3.0 meters. How much work is done on the box?

Rashid [163]

The answer is 12 J

because you have to multiply the two together. hope it helps

6 0

3 years ago