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
docker41 [41]
2 years ago
8

In a tape recorder, the tape is pulled past the read-and-write heads at a constant speed by the drive mechanism. Consider the re

el from which the tape is pulled -- as the tape is pulled off it, the radius of the roll of remaining tape decreases. How does the torque on this reel change with time
Physics
1 answer:
Irina-Kira [14]2 years ago
6 0

Answer:

Torque decreases .

Explanation:

The tape is pulled at constant speed , speed v is constant , so there is

v = ω r where ω is angular speed and r is radius , As radius decreases , angular speed ω increases , So there is angular acceleration .

Let it be α . Let I be moment of inertia of reel .

Reel is in the form of disc

I = 1/2 m r²

I x α = torque

1/2 m r² x α =  torque

As the reel is untapped , its mass decreases , r also decreases , so torques also decreases .

You might be interested in
On topographic maps, contour lines that are farther apart indicate what ?
gladu [14]

Answer:

if I am correct, they indicate less steep terrain. think of it as the steeper the terrain the closer together the lines would be. hope that makes sense for you guys.

4 0
2 years ago
How do sports play a role in American Culture? Is this different from how sports play a role in other cultures?
Nikolay [14]

Answer: American sports culture has a much greater appreciation of and emphasis towards collegiate and high school sports. This may be the strongest difference between American sports culture and every other countries' sports culture.

4 0
2 years ago
If a current is two amps and the resistance is 3 ohms, how much voltage was needed?
Hunter-Best [27]

Answer:

6 V

Explanation:

We can solve the problem by using Ohm's law:

V=RI

where

V is the voltage in the circuit

R is the resistance

I is the current

In this problem, we know the current, I=2 A, and the resistance, R=3 \Omega, therefore we can find the voltage in the circuit:

V=RI=(3 \Omega )(2 A)=6 V

7 0
2 years ago
How do I do this problem?
lesya692 [45]
Add then divide the hint clearly backs it up two so yeahh
3 0
3 years ago
An object has a mass of 50.0 g and a volume of 10.5 cm3. What is the object's density?
seraphim [82]
Volume=mass/density

volume=455.6/19.3

volume=23.6 mL

4 0
2 years ago
Other questions:
  • Marus traveled on a motorcylce distance of 1,298meters north to get to the nearest shopping center. He then turned back south an
    7·1 answer
  • A heat release of 4800 J for 8 minutes is released in the conductor during the flow of electricity. What is the current in the c
    8·1 answer
  • A device that uses electricity and magnetism to create motion is called a _________motor,magnet,generator . In a reverse process
    6·2 answers
  • Name the non metal condut electricity​
    5·1 answer
  • Two forces, F⃗ 1F→1F_1_vec and F⃗ 2F→2F_2_vec, act at a point. F⃗ 1F→1F_1_vec has a magnitude of 9.20 NN and is directed at an a
    15·1 answer
  • On the Moon's surface, lunar astronauts placed a corner reflector, off which a laser beam is periodically reflected. The distanc
    15·1 answer
  • When drawing up liquid into a micropipette, put the tip in the liquid at a Choose... degree angle, push the plunger to the Choos
    5·1 answer
  • Television is becoming a more effective mass media outlet for advertising because so many more people own TV sets and have acces
    14·1 answer
  • Ever love a subject but then you realised the subject dosen't love you back..
    14·2 answers
  • How do you find the weight of an object when given the mass and acceleration?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!