Ask question

Ask question

All categories

3 years ago

14

At the end of the passage, Sarah says to Emma, “You’re not the only one with tricks up your sleeves.” Explain what Sarah means b

y this. Use information from the passage to support your answer.

1 answer:

IrinaK [193]3 years ago

6 0

Answer:

Sarah plans to use trickery and cunning to get back at Emma. Sarah thinks she is smarter than Emma.

Explanation:

i think this is right i dont know tho

You might be interested in

Humans and fish brains are similar because they both have a?

velikii [3]

Answer:

it is because they can store and retrieve informatiion just like human beings

4 0

3 years ago

We have an Atwood device, two blocks connect by a string strung over a pulley, but the twist this time is that both blocks are o

Zanzabum

The Acceleration of the system is 6.41 m/s².

Given,

α= 15°, m₁ = 7kg

β= 65°, m₂ = 11 kg

Let, a be the acceleration and T is the tensions at the end it's the cord.

Let, the mass m₂ be coming down along the inclined plane along the inclined surface towards downward m₂g sin β and the tension in the upward direction,

Resultant force, m₂a=m₂g sin β -T

11a=((11) ×g sin 65°) -T ...(i)

Now, considering the motion of m₁ which moves downwards, the forces are m₁g sinα, and T both are acting downwards.

Resultant force m₁a = m₁g sin α+T

7a =7g sin 15°+T ...(ii)

Solving both the equations by adding them,

18a=11gsin 65°+7g sin 15°-T+T

18a=11gsin 65°+7g sin 15°=115.45

a=115.45/18=6.41 m/s²

Hence, the Acceleration of the system is 6.41 m/s².

Learn more about the acceleration here:

brainly.com/question/22048837

#SPJ10

6 0

2 years ago

A cylindrical conductor with a circular cross section has a radius a and a resistivity p and carries a constant current I. (Take

Lady bird [3.3K]

Answer:

Explanation:

a)

Using Ohms Law

$R= \rho \frac{l}{\pi a^2 }
\\V = IR = E l = I \rho \frac{l}{\pi a^2 }
\\E = \frac{I \rho}{\pi a^2 }
\\E = J \rho
$

Where J is the current density $J = \frac{I}{\pi a^2 }
$

and the direction of E is the same as the direction of the current. Since J is uniform throughout the conductor $E = \rhoJ$ just inside at a radius a (and anywhere else).

b)

Since we have no changing electric fields we can use Ampere’s law in it’s simplest form without displacement current

$\oint B .dl = B 2 \pi a = \mu_{o} I
$

such that

$B = \frac{\mu_{o} I}{2 \pi a }
$

and by the right hand rule, since the current is going to the right, the magnetic field is circling around the conductor such that it’s pointing out of the page at the top and into the page at the bottom.

c)

The Poynting vector is given by

$S = \frac{1}{ \mu_o} |E \textrm{x}B| = \frac{\rho I^2}{2 \pi^2 a^3}
$

and by the right hand rule it’s always pointing in towards the center of the conductor.

d)

Note: directions of these three vectors are mentioned along with their magnitudes in above 3 parts a , b and c

7 0

3 years ago

How much energy is contained in the mass of a 60-kilogram person?

Ratling [72]

I could tell you the energy if you can tell me the acceleration and height above earth's surface.

5 0

3 years ago

Read 2 more answers

A sports car and a minivan run out of gas and are pushed to the side of the road. Which is easier to push, and why?

astraxan [27]

Answer:

The correct option is;

The sports car, because it has less mass and therefore less inertia

Explanation:

Newton's first law of motion states that an object will continue in its state of rest or uniform motion in a straight line unless acted on by a force. The property exhibited by the object is known as inertia

Newton's second law states that force is directly proportional to the rate of change of momentum produced

The rate of change of momentum of an object is directly proportional to the resultant force applied and is in the direction of the resultant force. The resultant force is equal to the rate of change of momentum.

Therefore, we have;

F = m·dv/dt = m×a

Given that the force required to move an object is directly proportional to its mass therefore, the inertia or the object resistance that requires a force to bring change is directly proportional to the mass of the object.

The mass of a sports car being considered lesser than the mass of the minivan will require less force to push and therefore has less inertia.

7 0

3 years ago