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
Mashcka [7]
3 years ago
8

An electric motor rotating a workshop grinding wheel at 1.06 102 rev/min is switched off. Assume the wheel has a constant negati

ve angular acceleration of magnitude 2.10 rad/s2. (a) How long does it take the grinding wheel to stop
Physics
1 answer:
kvasek [131]3 years ago
6 0

Answer:

t = 106π / 30*2.1

Explanation:

w_{i} = 1.06*10^{2}    => 106

    => 106 x 2π/60

    => 106/30π

∝ = -2.1 rad/sec²

w_{f} => 0

w_{f} = w_{i} + ∝t

∴ (w_{f} - w_{i}) / ∝ = t

t = 106π / 30*2.1

You might be interested in
What is the tendency of a material to oppose the flow of charge?
Salsk061 [2.6K]
The answer is B. resistance
6 0
3 years ago
Read 2 more answers
A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.
Wittaler [7]

Answer:

600 mC

Explanation:

The charge of an electron is 1.6 x 10-19C so for a current with 10 mA, the charge going to screen in one second is 10 mC

so number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016  so in a minute the charge is 10 * 60 = 600 mC

4 0
2 years ago
Read 2 more answers
What is acceleration?​
jasenka [17]

Answer:

the rate of change of velocity per unit of time.

3 0
2 years ago
Read 2 more answers
An old clock has a spring that must be wound to make the clock hands move. Which statement describes the energy of the spring an
kondaur [170]

Answer:

D

Explanation:

When the spring is wound, then it gathers potential energy in the form of tension energy. As it slowly unwinds, the potential energy is converted to kinetic energy of the hands' movements of the clock. This energy is channeled through the use of cogs/gears in the clock.

7 0
3 years ago
Read 2 more answers
Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several ob
Alexxandr [17]

Answer:

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

Explanation:

The continuous flow of charges is known as electricity (current). The flow of these charges are due to free or mobile electron within the atoms of the conductors. The materials which will allow current to pass through them, must have free or mobile electrons which are loosely bound to their atoms.

Thus, the correction for this question is "D"

D. Electricity will flow if the electrons are bound loosely to their atoms in the material.

6 0
3 years ago
Other questions:
  • Vector a s is 2.80 cm long and is 60.0° above the x-axis in the first quadrant. vector b s is 1.90 cm long and is 60.0° below th
    12·1 answer
  • What is the weight of a 10 kg object on earth
    6·2 answers
  • A crest in a transverse wave corresponds to a in a longitudinal wave
    5·2 answers
  • The sun emits energy by converting hydrogen into helium. what is this process called?
    6·1 answer
  • a man exerts 3000.00N of force to push a car 35.00 meters in 90.00 seconds.... 1. what is the work done 2.what is the power gene
    7·1 answer
  • The refractive index of water is greater than that of air but is less than that of glass or a diamond. Under which condition can
    10·1 answer
  • For communication to take place, there has to be:
    15·1 answer
  • What nuclear process changes one element into another different element?
    8·2 answers
  • Un automóvil que va a 36Km/h acelera durante 8segundos hasta llegar a una velocidad de 108 Km/h y luego frena hasta detenerse en
    9·1 answer
  • Read the claim about caffeine. Caffeine improves mental alertness and motor coordination. A university research study was conduc
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!