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
stira [4]
3 years ago
13

The angular velocity of a process control motor is (13−12t2) rad/s, where t is in seconds. Part A At what time does the motor re

verse direction? Express your answer to two significant figures and include the appropriate units. tt = nothing nothing Request Answer Part B Through what angle does the motor turn between t =0 s and the instant at which it reverses direction? Express your answer to two significant figures and include the appropriate units. ΔθΔ θ = nothing nothing Request Answer
Physics
1 answer:
mihalych1998 [28]3 years ago
4 0

Answer:

Explanation:

Given

\omega =13-\frac{1}{2}\cdot t^2

Motor reverse its direction when \omega =0

13-0.5t^2=0

26=t^2

t=\sqrt{26}=5.099\approx 5.1 s

(b)

\frac{\mathrm{d} \theta }{\mathrm{d} t}=\omega

\int d\theta =\int_{0}^{5.1}\omega dt

\int d\theta =\int_{0}^{t}(13-.05t^2)dt

\theta =(13t-0.1667\times t^3)_0^{5.1}

\theta =44.192^{\circ}

You might be interested in
You are vacationing in Iceland and exploring one of its famous volcanoes, Eyjafjallajokul, which erupted in April 2010. While si
Natasha2012 [34]
Igneous rock is the correct answer I hope this helps 
8 0
3 years ago
Read 2 more answers
Whose geocentric model was accepted for 1400 years
zysi [14]
<span>IDK the answer but I think it was "Ptolemy" whose geocentric model of the solar system was accepted for 1,400 years, and was embraced by the the Church until Galileo called it into question.</span>
8 0
3 years ago
A typical running track is an oval with 74-mm-diameter half circles at each end. A runner going once around the track covers a d
lisabon 2012 [21]

The centripetal acceleration a is 4.32 \times 10^-4 m/s^2.

<u>Explanation:</u>

The speed is constant and computing the speed from the distance and time for one full lap.

Given, distance = 400 mm = 0.4 m,       Time = 100 s.

Computing the v = 0.4 m / 100 s

                         v = 4 \times 10^-3 m/s.

radius of the circular end r = 37 mm = 0.037 m.

            centripetal acceleration a = v^2 / r

                                                        = (4 \times 10^-3)^2 / 0.037

                                                    a = 4.32 \times 10^-4 m/s^2.

6 0
3 years ago
TRUE OR FALSE? earth revolves around the sun tilted on its axis
Alex777 [14]

The axis of the Earth's rotation is tilted relative to the plain of the Earth's revolution around the Sun.

The question is worded very poorly, but you'd have to say it's TRUE.  

6 0
3 years ago
Read 2 more answers
50 POINTS !!!
shepuryov [24]

Answer:

a) I = 464 kg m²,  b)  K = 631 .6 J, c)  v = 8.25 m / s

Explanation:

a) the moment of inertia of point particles is

          I = ∑ m_i r_i²

in this case

          I = 8 5² + 3 (-2) ² + 7 (-6) ²

          I = 464 kg m²

b) The kinetic energy is

          K = ½ I w²

          K = ½ 464 1.65²

          K = 631 .6 J

c) linear and angular velocity are related

          v = w r

          v = 1.65 5

          v = 8.25 m / s

8 0
2 years ago
Other questions:
  • An outside thermometer reads 57°F. What is this temperature in °C? Round your answer to the nearest whole number.
    9·2 answers
  • If it took 10sec to climb the ladder what was your power in watts nd kilowatt?
    7·1 answer
  • What does scientific theory mean​
    12·2 answers
  • Which of the following is a risk associated with texting?
    13·1 answer
  • Which chart provides the correct number of neutrons for each isotope of tin (Sn)?
    14·1 answer
  • A solenoid has a length , a radius , and turns. The solenoid has a net resistance . A circular loop with radius is placed around
    8·1 answer
  • a bus is moving with the velociity of 36 km/hr . after seeing a boy at 20 m ahead on the road, the driver applies the brake and
    11·1 answer
  • A car travels at 20km/h for 60 mins how far does it travel
    9·1 answer
  • State Newton's first law of motion .​
    15·1 answer
  • How long does it take for a bicycle traveling 7.0 m/s to come to a stop if the
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!