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Dafna1 [17]
3 years ago
15

Sound waves can travel through which mediums?

Physics
1 answer:
aksik [14]3 years ago
5 0

Answer:

B. Solids, liquids, and gases.

Explanation:

I have no explanation.

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A thin, horizontal square copper plate has a length of 6.35cm and is charged with 2.56 × 108 electrons. If the electrons are uni
Strike441 [17]
This is either a trick question or a very hard one. In the first case: An electric field cannot occur inside a conductor (or by using the superposition principle you find out that at this point your electric fields cancel each other out)... Or you must use the laplace equation and proper boundary conditions to solve for the electrostatic potential 

<span>Edit: Considering the center of mass of the plate is on the plate</span>
5 0
4 years ago
An example of an anaerobic exercise is what?
san4es73 [151]

Answer:

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6 0
3 years ago
WHAT- HOW WAS THIS NOT ACADEMIC? IT WAS A QUESTION ABOUT WHY BLACK HOLES ARE INVISIBLE LOL.
LenKa [72]

Answer:

brainly getting too strict smh...

Explanation:

5 0
3 years ago
A book of mass 3 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient o
bonufazy [111]

Answer: 24.7 degrees Max

Explanation:

m*g = 3 * 9.8 = 29.4 N. = Wt. of book.



Fp = 29.4*sin A = Force parallel to the
plank.



Fn = 29.4*Cos A = Force perpendicular to
the plank.



Fs = u*Fn = 0.46*29.4*Cos A

Fp-Fs = m*a


29.4*sin A - 0.46*29.4*Cos A = m*0 = 0


29.4*Sin A = 0.46*29.4*Cos A


Sin A = 0.46*Cos A


Divide both sides by Cos A:


Sin A/Cos A = 0.46


Replace Sin A/Cos A with Tan A:


Tan A = 0.46


A = 24.7 degrees Max.

8 0
3 years ago
The sports car has a mass of 1.5 Mg Mg and a center of mass at G. Determine the shortest time it takes for it to reach a speed o
mezya [45]

Answer:

\Delta t = 17.041\,s

Explanation:

The figure of the problem is included below as attachment. The equations of equilibrium are presented below:

\Sigma F_{x} = -\mu\cdot N_{1} = m\cdot a

\Sigma F_{y} = N_{1} + N_{2} - m\cdot g = 0

\Sigma M_{G} = N_{1}\cdot x_{1} - N_{2}\cdot x_{2} - \mu\cdot N_{1}\cdot y_{1} = 0

The system of equations are:

-0.2\cdot N_{1} = (1500\,kg)\cdot a

N_{1} + N_{2} - (1500\,kg)\cdot \left(9.807\,\frac{m}{s^{2}}\right) = 0

N_{1} \cdot [(0.75\,m)-0.2\cdot (0.35\,m)] - N_{2}\cdot (1.25\,m) = 0

The solution of the system is:

N_{1} = 9780.918\,N, N_{2} = 4929.582\,N and a = - 1.304\,\frac{m}{s^{2}}

The shortest time to reach a speed of 80 km/h is:

\Delta t = \frac{22.222\,\frac{m}{s}-0\,\frac{m}{s}}{1.304\,\frac{m}{s^{2}} }

\Delta t = 17.041\,s

7 0
4 years ago
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