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
Crank
3 years ago
13

The study of alternating electric current requires the solutions of equations of the form i equals Upper I Subscript max Baselin

e sine 2 pi ft comma for time t in​ seconds, where i is instantaneous current in​ amperes, Imax is maximum current in amperes and f is the number of cycles per second. Find the least positive value of​ t, given the following data. i=180, Imax=200, f=50
Physics
1 answer:
KiRa [710]3 years ago
8 0

Answer:

Explanation:

i = Imax sin2πft

given i = 180 , Imax = 200 , f = 50  , t = ?

Put the give values in the equation above

180 = 200 sin 2πft

sin 2πft = .9

sin2π x 50t = .9

sin 360 x 50 t = sin ( 360n + 64 )

360 x 50 t = 360n + 64

360 x 50 t =  64 ,  ( putting n = 0 for least value of t )

18000 t = 64

t = 3.55 ms  .

You might be interested in
Why does it matter if a material is amorphous or crystalline? How does the arrangement of atoms affect the properties of materia
Rashid [163]

Answer:

<em>It matters because crystalline and amorphous materials have different properties. The arrange affects the melting point (defined in crystals and a larger range in amorphous) and shape (geometrical in crystals, no geometrical in amorphous). </em>

Explanation:

The particles that compose a solid material are held in place by strong tractive forces between them when we analyze solids we consider the position of the atoms (molecules or ions) rather than their motion (which is important in liquids and gases). This positioning can be arranged in two general ways:

  • Crystalline solids have internal structures that in turn lead to distinctive flat surfaces or face, these faces intersect at angles that are characteristic of the substance, crystals tend to have sharp, well defined and high melting points because of the same distance from the same number and type of neighbors. They generally have geometric shapes, some examples are diamonds, metals, salts.
  • Amorphous solids produce irregular or curved surfaces when broken and they have poorly defined patterns when exposed to x rays because of their irregular array. In contrast with crystal solids, amorphous solids soften over a wide temperature range due to the different amounts of thermal energy needed to overcome different interactions. Some examples of these solids are gels, plastics, and some polymers.

I hope you find this information useful and interesting! Good luck!

8 0
3 years ago
A polo player hits a ball with a mass of 0.42 kg with a force of 7.35 Newtons.
Serga [27]
Due to the law of conservation of momentum, the force exerted on the mallet is equal and opposite to the force exerted on the ball, so the answer is C.
4 0
3 years ago
Read 2 more answers
Regular __________ disturbances that carry<br> energy through matter or space
Anna35 [415]
Yessssssssssssssssssssssss
3 0
3 years ago
Read 2 more answers
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball
Aleksandr [31]

Answer:

the velocity (magnitude and direction) of the ball)  just before the collision is v_i = 5.144 \ m/s

The  velocity (magnitude and direction) of the ball)  just after  the collision is v_f = - 1.129  \ m/s

Explanation:

According to the law of conservation of energy;

m__{ball}} gh = \frac{1}{2}m__{ball}}v_i^2\\\\2* m__{ball}} gh = m__{ball}}v_i^2\\\\v_i^2 = \frac{2*m_{ball}gh}{m_{ball}}\\\\v_i^2 = 2gh\\\\v_i = \sqrt{2gh} \\\\v_i = \sqrt{2*9.8*1.35}\\\\

v_i = 5.144 \ m/s

Thus; the velocity (magnitude and direction) of the ball)  just before the collision is v_i = 5.144 \ m/s

Since, Air resistance is negligible, and the collision is elastic.

The equation for the conservation of momentum and energy can be expressed as:

v_f = [\frac{m_1 -m_2}{m_1+m_2}]v_i\\\\v_f =  [\frac{m_{ball} -m_{block}}{m_{ball}+m_{block}}]v_i\\\\v_f = [\frac{1.6 -2.5}{1.6+2.5}]*5.144\\\\

v_f = - 1.129  \ m/s

The  velocity (magnitude and direction) of the ball)  just after  the collision is v_f = - 1.129  \ m/s

8 0
3 years ago
What does a pshycometer measure
erma4kov [3.2K]
It measures<span> the relative humidity in the atmosphere through the use of two thermometers. The first, a dry bulb thermometer, is used to </span>measure<span> the temperature by being exposed to the air. The second, a wet bulb thermometer,</span>measures<span> temperature by having the bulb dipped in a liquid.</span>
5 0
3 years ago
Other questions:
  • The energy emitted from the sun is a product of ________.
    9·1 answer
  • What is the spring constant for a supermarket scale that stretches 0.01 m when a force of 4 N is applied
    9·2 answers
  • Explain how the earth is round and not flat
    14·2 answers
  • Suppose the activity of a sample of radioactive material was 100Bq at the start. What would you divide 100Bq by to obtain the ac
    10·1 answer
  • Which example provides the most complete description of an object's motion?
    8·2 answers
  • Is a person believes that dreams have hidden meaning how or she would agree with Freud's ideas about _ content?
    5·2 answers
  • Which of the following is a result of gravitational forces in the Solar System?
    9·1 answer
  • Calculate the net force on the right charge due to the other two. Enter a positive value if the force is directed to the right a
    15·1 answer
  • If the star Alpha Centauri were moved to a distance 10 times farther than it is now, its parallax angle would
    5·1 answer
  • Which of the following are vector quantities? Select all that apply.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!