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
tiny-mole [99]
3 years ago
9

CAN ANY OF YALL ANSWER DIS PLS!!!!!!!! I AM GIVING 20 POINTS BTW!!!!!!!

Physics
1 answer:
sveticcg [70]3 years ago
4 0
PHYSICAL CHANGES :
Melting an ice cube.
Boiling water.
Mixing sand and water.
Breaking a glass.
CHEMICAL CHANGES :
Digesting food.
Cooking an egg.
Heating sugar to form caramel.
You might be interested in
Which statement best describes the polarization of light
QveST [7]
The wave oscillates in a single plane. so the answer would be (c) i think
8 0
3 years ago
g Consider a (12.5 A) cm long metal bar moving horizontally across a vertical magnetic field at a speed of (2.40 B) m/s. The mag
Misha Larkins [42]

Answer:

Explanation:

emf   due to movement of a rod of length L in a perpendicular to magnetic field B with velocity v is given as

emf = BLv

Putting in the given values ,

E = 2.45 x 12.5 x 10⁻² x 2.4

= .735 V

This emf produces current in resistance . Power consumed by resistance

V² / R where R is resistance , V is emf induced .

Power = .735² / 1.2

= .45 W .

7 0
2 years ago
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they
nadezda [96]

Since no external torque is acting on the system you can use the conservation of angular momentum. I derived the final angular speed below and shown my work on how I did it. It’s now just a matter of plugging in the numbers and using correct placement of negative sign for direction of angular velocity. L in the picture stands for angular momentum. Hope it helps

4 0
3 years ago
The communications system has evolved greatly in the last 20 years. People are now able to communicate more quickly and easily u
Leya [2.2K]

Answer:

Explanation:

transportation might be affected if there's an increase of populatio in canada

3 0
2 years ago
Read 2 more answers
A 250 kg flatcar 25 m long is moving with a speed of 3.0 m/s along horizontal frictionless rails. A 61 kg worker starts walking
Anna11 [10]

Answer:

x=31.09m

Explanation:

p1=p2

The momentum of flatcar and the momentum of the worker so

The velocity of the worker is:

m_{f}*v_{f}=m_{w}*v_{w}\\\\v_{f}=\frac{m_{f}*v_{f}}{m_{w}}\\v_{f}=\frac{61kg*3.0\frac{m}{s}}{250kg}\\v_{f}=0.732\frac{m}{s}

The total motion has a total velocity and is

Vt=v_{w}+v_{f}\\Vt=0.732\frac{m}{s}+3.0\frac{m}{s}\\Vt=3.732\frac{m}{s}

The time the worker take walking is

t=\frac{x}{v_{w}}\\t=\frac{25m}{3\frac{m}{s}}=8.33s

Now the total time and the total velocity determinate the motion of tha flatcar how far has moved

x=t*Vt\\x=8.33s*3.732\frac{m}{s} \\x=31.09m

5 0
3 years ago
Other questions:
  • Which of the following is a mixture?<br><br> A. steel<br> B. water<br> c. oxygen<br> D. gold
    14·1 answer
  • A battery-operated car utilizes a 12.0 V system. Find the charge the batteries must be able to move in order to accelerate the 7
    9·1 answer
  • The position of a particle for t &gt; 0 is given by ????⃗ (????)=(m.
    5·1 answer
  • When a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is
    13·2 answers
  • 3. A -4.00-uC charge lies 20.0cm to the right of a 2.00-uC charge on the x axis. What is the force on the 2.00-uC charge?
    13·1 answer
  • Use this scenario to answer the four following questions. A person is on a sled on top of a snow covered hill. The vertical dist
    11·1 answer
  • A doctor is examining a child with a red, inflamed ear
    10·1 answer
  • Plz help i dont understand
    11·1 answer
  • Introduction for Home economics project​
    12·2 answers
  • How energy efficiency can reduce energy consumption?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!