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
Montano1993 [528]
4 years ago
8

a class of seventh grade students conducted various scientific investigations throughout the year. which statement is the best e

xample of repetition? ​
Physics
1 answer:
MArishka [77]4 years ago
5 0

Answer:

c

Explanation:it is

You might be interested in
What Happens when a warm fluid cools down
tiny-mole [99]
Energy is released to the environment. 
7 0
3 years ago
A simple generator has a square armature 6.0 cm on a side. The armature has 85 turns of 0.59-mm-diameter copper wire and rotates
FrozenT [24]

Answer:

f=15.5 Hz

Explanation:

Let's determine the internal resistance:

R=\frac{(p*L)}{A}

ρ = 1.68*10^-8 Ω m

L=0.060m*4*60 = 14.4m

A=\pi*r^2\\A= \pi*(5.9x10^-4m/2)^2=2.734*10^-7m^2

R=(1.68*10^-8)*(14.4m)/(2.734*10^-7m^2)= 0.884Ω

Since the bulb is rated at 12.0 V and 25.0 W,

Current

I=\frac{25W}{12.0v}=2.08 A

Therefore, voltage drop inside generator =

V=(2.08 A)*(0.88)=2.35v

Actual EMF required is

E_{mf}=12.0v+2.35v=14.35v

Note that this is an RMS value.  

The peak voltage is

v_{peak}=14.15v*\sqrt{2} =20.29v

For a generator, by Faraday's Law,

E_{(max)}=N*B*A*w

20.29v=(60)*(0.650T)*(0.06m)^2*ω

ω=144.5\frac{rad}{s}

f=ω/(2π)=

f=144.5 rad/s/(2π)

f=23.001 Hz

6 0
3 years ago
Which of the four containers represents a compound?<br><br>A)ClB)H2OC)N2D)Na
vfiekz [6]

the answer is A compound is represented by two or more elements in a definite proportion. That is represented by H2O.

8 0
3 years ago
Read 2 more answers
All of the following are basic need of young children, except
deff fn [24]

Answer:

C

Explanation:

Coz its like that (ye ik probs wrong ans but ye)

5 0
3 years ago
Read 2 more answers
What is meant by sundial???​
Fofino [41]

Answer:

Sundial is an instrument showing the time by the shadow of a pointer cast by the sun on to a plate marked with the hours of the day.

4 0
2 years ago
Read 2 more answers
Other questions:
  • NEED HELP QUICK
    14·1 answer
  • A car of mass m = 1030 kg is traveling down a θ = 13-degree incline. When the car's speed is v0 = 14 m/s, a mechanical failure c
    14·1 answer
  • (a) If half of the weight of a small 1.00×103kg utility truck is supported by its two drive wheels, what is the magnitude of the
    11·1 answer
  • Sinusoidal water waves are generated in a large ripple tank. The waves travel at 20 cm/s and their adjacent crests are 5.0 cm ap
    13·1 answer
  • According to Ohm's law what would happen if the current was increased and the resistance was held constant?
    7·1 answer
  • A weight of 12.0 N hangs motionless from a spring, with a spring constant of 10.0 N/m. How far is the spring stretched from its
    9·2 answers
  • Eruption of a large volcano on a tropical island releases ash and gases into the atmosphere. after the eruption, the air tempera
    11·1 answer
  • Find the tension in cord A in the figure if the weight of the suspended object is 250 N. the cord is at a 30 degree angle
    11·1 answer
  • She walks 50 yards north 20 yards east 50 yards south what is total displacement
    7·1 answer
  • A 7.30 kg sign hangs from two wires. The
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!