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
Brut [27]
3 years ago
14

-

Physics
1 answer:
Paha777 [63]3 years ago
5 0

Answer:

=140 cm²

Explanation:

1

____ ×20x 14

2

=1

___ x base × height

is the formula have a gr8 day :)

2

You might be interested in
How many DAYS occur between a new moon and a first quarter moon?
N76 [4]

Answer:

About 29.5

Explanation:

4 0
3 years ago
Read 2 more answers
How can the frequency with which the direction of a current changes be regulated?
sesenic [268]

Answer:

In an inductive circuit, when frequency increases, the circuit current decreases and vice versa.

Explanation:

5 0
3 years ago
A flywheel turns through 40 rev as it slows from an angular speed of 1.5 rad/s to a stop.
Lynna [10]

Answer:

-0.0047 rad/s²

335.103 seconds

99.18 seconds

Explanation:

\omega_f = Final angular velocity

\omega_i = Initial angular velocity = 1.5 ra/s

\alpha = Angular acceleration

\theta = Angle of rotation = 40 rev

t = Time taken

Equation of rotational motion

\omega_f^2-\omega_i^2=2\alpha \theta\\\Rightarrow \alpha=\frac{\omega_f^2-\omega_i^2}{2\theta}\\\Rightarrow \alpha=\frac{0^2-1.5^2}{2\times 2\pi \times 40}\\\Rightarrow \alpha=-0.0047\ rad/s^2

Acceleration while slowing down is -0.0047 rad/s²

t=\frac{\omega_f-\omega_i}{\alpha}\\\Rightarrow t=\frac{0-1.5}{-0.0047}\\\Rightarrow t=335.103\ s

Time taken to slow down is 335.103 seconds

\theta=\omega_it+\frac{1}{2}\alpha t^2\\\Rightarrow 20\times 2\pi=1.5\times t+\frac{1}{2}\times -0.0047\times t^2\\\Rightarrow 0.00235t^2-1.5t+125.66=0

Solving the equation

t=\frac{-\left(-1.5\right)+\sqrt{\left(-1.5\right)^2-4\cdot \:0.00235\cdot \:125.66}}{2\cdot \:0.00235}, \frac{-\left(-1.5\right)-\sqrt{\left(-1.5\right)^2-4\cdot \:0.00235\cdot \:125.66}}{2\cdot \:0.00235}\\\Rightarrow t=539.11, 99.18\ s

The time required for it to complete the first 20 is 99.18 seconds as 539.11>335.103

4 0
3 years ago
Using the ideas from this section and the periodic table, choose the more reactive metal. Cs or Na
Elodia [21]
Cs would be most reactive.
3 0
3 years ago
Read 2 more answers
You spill a bucket of soapy water on a marble floor accidentally.Would it make it easier or difficult for you to walk on the flo
stiks02 [169]

Answer:

Of course harder

Explanation:

Just imagone the floor is wet and you walk on it, do u feel it hard or easy to walk? :D

7 0
3 years ago
Read 2 more answers
Other questions:
  • An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?
    10·1 answer
  • A resistor and a capacitor are connected in series across an ideal battery having a constant voltage across its terminals. Long
    11·1 answer
  • What is the smallest particle of the element iron (fe) that can be as iron ?
    9·1 answer
  • At a certain time a particle had a speed of 18 m/s in the positive x direction, and 2.4 s later its speed was 30 m/s in the oppo
    12·1 answer
  • A test charge of +4 µC is placed halfway between a charge of +6 µC and another of +2 µC separated by 20 cm. (a) What is the magn
    12·1 answer
  • Which of these is a TRUE statement
    12·2 answers
  • A insect is resting on the rim of a rotating table topper the topper is stopped after covering 125° and 1.3s later. What was the
    15·1 answer
  • What type of charge will an object have if the object contains less protons than electrons?
    13·1 answer
  • A race car traveling at 44m/s slows at a constant rate to a velocity of 22m/s over 11 seconds , how far does it move during this
    12·1 answer
  • a car mass 1500kg traveling at a uniform velocity of 30 m/s due east .the driver applies the brake to slow down the car to a vel
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!