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
Elis [28]
3 years ago
14

Breaking a pencil in half is an example of: options:

Physics
2 answers:
Licemer1 [7]3 years ago
8 0

Answer:

b

Explanation:

IRISSAK [1]3 years ago
8 0
Answer
physical change

explanation
breaking the pencil is only changing the physical form and you can always sharpen it to fix it

hope this helps and have a wonderful day :)
You might be interested in
A record turntable is rotating at 33 rev/min. A watermelon seed is on the turntable 4.0 cm from the axis of rotation. (a) Calcul
Annette [7]

Answer:

a) a = 0.477 m/s^2

b) u = 0.04862

Explanation:

Given:-

- The rotational speed of the turntable N = 33 rev/min

- The watermelon seed is r = 4.0 cm away from axis of rotation.

Find:-

(a) Calculate the acceleration of the seed, assuming that it does not slip. (b) What is the minimum value of the coefficient of static friction between the seed and the turntable if the seed is not to slip

Solution:-

- First determine the angular speed (w) of the turntable.

                   w = 2π*N / 60

                   w = 2π*33 / 60

                   w = 3.456 rad/s

- The watermelon seed undergoes a centripetal acceleration ( α ) defined by:

                   α = w^2 * r

                   α = 3.456^2 * 0.04

                   α = 0.477 m / s^2

- The minimum friction force (Ff) is proportional to the contact force of the seed.

- The weight (W) of the seed with mass m acts downwards. The contact force (N) can be determined from static condition of seed in vertical direction.

                   N - W = 0

                   N = W = m*g

- The friction force of the (Ff) is directed towards the center of axis of rotation, while the centripetal force acts in opposite direction. The frictional force Ff = u*N = u*m*g must be enough to match the centripetal force exerted by the turntable on the seed.

                    Ff = m*a

                    u*m*g = m*a

                    u = a / g

                    u = 0.477 / 9.81

                    u = 0.04862

8 0
2 years ago
: The truck is to be towed using two ropes. Determine the magnitudes of forces FA and FB acting on each rope in order to develop
Sholpan [36]

Answer:

Fa=774 N

Fb=346 N

Explanation:

We will solve this problem by equating forces on each axis.

  1. On x-axis let forces in positive x-direction be positive and forces in negative x-direction be negative
  2. On y-axis let forces in positive y-direction be positive and forces in negative y-direction be negative

While towing we know that car is mot moving in y-direction so net force in y-axis must be zero

⇒∑Fy=0

⇒Fa*sin(50)-Fb*sin(20)=0

⇒Fa*sin(50)=Fb*sin(20)

⇒Fa=2.24Fb

Given that resultant force on car is 950N in positive x-direction

⇒∑Fx=950  

⇒Fa*cos(20)+Fb*cos(50)=950

⇒2.24*Fb*cos(20)+Fb(50)=950

⇒Fb*(2.24*cos(20)+cos(50))=950

⇒Fb=\frac{950}{2.24*cos(20)+cos(50)}

⇒Fb=\frac{950}{2.24*0.94+0.64}

⇒ Fb=\frac{950}{2.75}=345.5

⇒Fa=2.24*Fb

      =2.24*345.5

      =773.93

Therefore approximately, Fa=774 N and Fb=346 N

5 0
3 years ago
1. A force acting on an object in the upward direction is 3 N. The force that would
DENIUS [597]

Answer:

See the explanation below

Explanation:

We must perform a sum of forces on the body, that sum of forces is equal to zero. That is, the body is in balance and does not move.

ΣF = 0

3 - 3 = 0

This force is negative and acts by pointing downwards.

4 0
3 years ago
Read 2 more answers
What are three things you already know about the game of baseball?
Tatiana [17]

Answer:

Positions

Batting

Pitching

Explanation:

4 0
3 years ago
consisting of an electric coil on a small paddle held over an area of the brain, __________ deactivates areas of the brain, allo
SCORPION-xisa [38]

Answer:

transcranial

Explanation:

pls mark brainliest

3 0
2 years ago
Other questions:
  • A student walks 24 m from her math class and then turns 90° and walks 10 m to her locker, which is directly north of her class.
    15·2 answers
  • Describe what happens, at a microscopic level, when an object is charged by rubbing. For instance, what happens when a plastic p
    14·1 answer
  • Physics help! I really need this homework done:
    8·1 answer
  • Which one of the following accurately pairs the device with its function?
    10·2 answers
  • Turning the barrel of a 50-mm-focal-length lens on a manual-focus camera moves the lens closer to or farther from the sensor to
    5·1 answer
  • A rocket accelerates straight up from the ground at 12.6 m/s^2 for 11.0 s. Then the engine cuts off and the rocket enters free f
    11·1 answer
  • 7. A student walks 3 blocks east, 4 blocks north, and 3 blocks west. What is the displacement of the student? (5 points)
    10·2 answers
  • How does sea floor spreading provide an explanation for how continents may move over earths surface?(I know this isn't Physics,
    14·1 answer
  • What's the effect of mass and speed on kinetic energy
    5·1 answer
  • Please help thank you!
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!