1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mote1985 [20]
3 years ago
5

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means th

at unrealistically large currents are needed to produce noticeable torques. Suppose a 20-cm-diameter loop of wire is oriented for maximum torque in the earth's field.What current would it need to carry in order to experience a very modest 1.0?
Physics
1 answer:
fiasKO [112]3 years ago
8 0

Answer:

636.619772368 A

Explanation:

\tau = Torque = 1\times 10^{-3}\ N/m

B = Magnetic field of Earth = 5\times 10^{-5}\ T

A = Area

d = Diameter = 20 cm

Current is given by

I=\dfrac{\tau}{BA}\\\Rightarrow I=\dfrac{1\times 10^{-3}}{5\times 10^{-5}\times \dfrac{\pi}{4}\times 0.2^2}\\\Rightarrow I=636.619772368\ A

The current is 636.619772368 A

You might be interested in
A student is trying to calculate the density of an ice cream cone. She already knows the mass, but she needs to determine the vo
vladimir2022 [97]
V= 1/3 π r²h 
this is the formula for a cone hope this helps :) 

5 0
3 years ago
Read 2 more answers
The horizontal surface on which the objects slide is frictionless. If M = 1.0 kg and the magnitude of the force of the small blo
sweet-ann [11.9K]

Answer:

The force is 7.8 N.

Explanation:

Given that,

Mass of small object = 2M

Mass of large object = 4M

Here, M = 1.0 kg

Force of the small block = 5.2 N

We need to calculate the acceleration of 4 kg block

Using formula of force

F=ma

a=\dfrac{F}{m}

a=\dfrac{5.2}{4}

a=1.3\ m/s^2

The 2 kg block is also accelerating at 1.3 m/s², making a total of 6 kg.

We need to calculate the force

Using formula of force

F=ma

Put the value into the formula

F=6\times1.3

F=7.8\ N

Hence, The force is 7.8 N.

5 0
3 years ago
The velocity vector of an object with a centripetal acceleration is never tangent to the circular path.
Veseljchak [2.6K]

<em>The velocity vector of an object with a centripetal acceleration is never tangent to the circular path is False.</em>

Answer: <em>False</em>

Explanation:

Centripetal acceleration is a feature of objects in uniform circular motion. In that case velocity is along the tangent drawn to the circular path. For an object to be called accelerating its velocity should be variable but speed needn’t.  

Even when the speed is constant an object can be accelerating. The direction of velocity of an object in uniform circular motion keeps changing  continuously. This change in velocity in uniform circular motion is equal to the centripetal acceleration.

5 0
3 years ago
Planet A and planet B are in circular orbits around a distant star.
evablogger [386]

Answer:

\frac{v_A}{v_B}=0.402

Explanation:

The speed that planets must have in order for their orbit to be stable, is given by:

v=\sqrt{\frac{GM}{r}}

Here v It is called orbital speed, G is the gravitational constant, M is the mass of the star and r is the radius of the orbit. In this case we have:

r_A=6.2r_B

So, the ratio of their speed is:

\frac{v_A}{v_B}=\frac{\sqrt{\frac{GM}{r_A}}}{\sqrt{\frac{GM}{r_B}}}\\\frac{v_A}{v_B}=\sqrt{\frac{r_B}{r_A}}\\\frac{v_A}{v_B}=\sqrt{\frac{r_B}{6.2r_B}}\\\frac{v_A}{v_B}=\sqrt{\frac{1}{6.2}}\\\frac{v_A}{v_B}=0.402

8 0
3 years ago
If a car can go from 0.0 to 60.0 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its
o-na [289]
a =  \frac{60 }{8}  = 7,5 \ mph \ gained \ each\ second \\ final \ speed: 97.5 \ mph \ [ 50 + 7,5 * 5]
4 0
3 years ago
Other questions:
  • The force of gravity is an inverse square law. this means that, if you double the distance between two large masses, the gravita
    7·1 answer
  • How can people who live near rivers control flodding
    15·2 answers
  • Using energy considerations, calculate the average force (in N) a 67.0 kg sprinter exerts backward on the track to accelerate fr
    8·2 answers
  • A wooden block contains some nails so that its density is exactly equal to that of water. If it is placed in a tank of water and
    6·1 answer
  • FILL IN THE BLANKS here on earth, the pull of gravity on a mass of 1 kg is ......... newtons​
    15·1 answer
  • Read this excerpt from Through the Looking-Glass by Lewis Carroll.
    13·1 answer
  • A big red fish with a mass of 20 kg swims with a velocity of 2 m/s toward a small, stationary green fish which has a mass of 10
    13·1 answer
  • 2. A book with a mass of 2 Kg is resting on a shelf 1.5 m off the floor. How much gravitational
    14·2 answers
  • A 20 Ohm resistance is connected
    10·1 answer
  • What is the value of n in the balmer series for which the wavelength is 410.2 nm.?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!