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
marin [14]
3 years ago
6

22. Cindy created a solenoid by coiling a copper wire and attaching it to a battery.

Physics
2 answers:
olga55 [171]3 years ago
8 0

Answer:

its b

Explanation:

trust me

wel3 years ago
4 0
The best answer to go with is b
You might be interested in
A flywheel in a motor is spinning at 590 rpm when a power failure suddenly occurs. The flywheel has mass 40.0 kg and diameter 75
Gnom [1K]

Answer:

Explanation:

Hello,

Let's get the data for this question before proceeding to solve the problems.

Mass of flywheel = 40kg

Speed of flywheel = 590rpm

Diameter = 75cm , radius = diameter/ 2 = 75 / 2 = 37.5cm.

Time = 30s = 0.5 min

During the power off, the flywheel made 230 complete revolutions.

∇θ = [(ω₂ + ω₁) / 2] × t

∇θ = [(590 + ω₂) / 2] × 0.5

But ∇θ = 230 revolutions

∇θ/t = (530 + ω₂) / 2

230 / 0.5 = (530 + ω₂) / 2

Solve for ω₂

460 = 295 + 0.5ω₂

ω₂ = 330rpm

a)

ω₂ = ω₁ + αt

but α = ?

α = (ω₂ - ω₁) / t

α = (330 - 590) / 0.5

α = -260 / 0.5

α = -520rev/min

b)

ω₂ = ω₁ + αt

0 = 590 +(-520)t

520t = 590

solve for t

t = 590 / 520

t = 1.13min

60 seconds = 1min

X seconds = 1.13min

x = (60 × 1.13) / 1

x = 68seconds

∇θ = [(ω₂ + ω₁) / 2] × t

∇θ = [(590 + 0) / 2] × 1.13

∇θ = 333.35 rev/min

8 0
3 years ago
The escape velocity of any object from Earth is 11.2 km/s. (a) Express this speed in m/s and km/h. (b) At what temperature would
natima [27]

Answer:

a ) 11.1 *10^3 m/s = 39.96 Km/h

b) T_{o2} =1.58*10^5 K

Explanation:

a)v_{es} =v_{rms}= 11.1 km/s =11.1 *10^3 m/s = 39.96 Km/h

b)

M_O2 = 32.00 g/mol =32.0*10^{-3} kg/mol

gas constant R = 8.31 j/mol.K

v_{rms} = \sqrt{ \frac{3RT}{M}}

So, v_{rms,o2} =\sqrt{ \frac{3RT_{o2}}{M_{o2}}}

multiply each side by M_{o2}, so we have

v_{rms,o2}^2 *M_{o2} =3RT_{o2}

solving for temperature T_{o2}

T_{o2} = \frac{v_{rms,o2}^2 *M_{o2}}{3R}

In the question given,v_{rms} =v_{es}

T_{o2} = \frac{(11.1*10^3)^2 *32.0*10^{-3}}{3*8.31}

T_{o2} =1.58*10^5 K

7 0
3 years ago
to skiers are headed downhill along a very icy part of the Health one person is moving at 10m/s and has a mass of 50 kg  and
hjlf

Answer:

hmm sorry but ill answer it later

Explanation:

7 0
2 years ago
Accelerated depreciation has an advantage for profitable firms in that it moves some cash flows forward, thus increasing their p
scZoUnD [109]

Answer: A. True

Explanation:

6 0
3 years ago
The diagram shows the forces acting on a cart.
ahrayia [7]

Answer:

c) the speed of the cart is changing

7 0
2 years ago
Read 2 more answers
Other questions:
  • Cardiorespiratory fitness improves the efficiency of the cardiovascular and the respiratory systems in delivering oxygen to the
    11·1 answer
  • Gina is driving her car down the street. She has a teddy bear sitting on the back seat. A dog runs in front of Gina's car, so sh
    11·1 answer
  • Which of the following equals the change in velocity divided by the time?
    14·2 answers
  • What must happen to an atom of magnesium in order to become a magnesium ion Mg+2?
    10·2 answers
  • Which term is the rate at which work is done? energy power joules force
    9·1 answer
  • Why is the Mid-Atlantic Ridge an ideal place for SWARM to collect electrical conductivity data?
    6·2 answers
  • Typically, a bullet leaves a standard 45-caliber pistol (5.0-in. barrel) at a speed of 262 m/s. If it takes
    9·1 answer
  • What type of Circuit do they use in a home? WHY ? (Simple circuit / Parallel circuit / Series circuit) helpp
    7·1 answer
  • Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of 4930 km .
    10·1 answer
  • the ability of torricelli's hypothesis about atmospheric pressure to suggest the design of the barometer is an illustration of:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!