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
KatRina [158]
2 years ago
7

f an earthquake’s magnitude is measured based on the richter scale, how is this abbreviated? a. mr b. ms c. ml d. mb

Physics
1 answer:
zhannawk [14.2K]2 years ago
5 0
The answer is A. Hope this helps!
You might be interested in
Assume that block A which has a mass of 30 kg is being pushed to the left with a force of 75 N along a frictionless surface. Wha
Veronika [31]

Answer:

The force of friction acting on block B is approximately 26.7N.  Note: this result does not match any value from your multiple choice list. Please see comment at the end of this answer.  

Explanation:

The acting force F=75N pushes block A into acceleration to the left. Through a kinetic friction force, block B also accelerates to the left, however, the maximum of the friction force (which is unknown) makes block B accelerate by 0.5 m/s^2 slower than the block A, hence appearing it to accelerate with 0.5 m/s^2 to the right relative to the block A.

To solve this problem, start with setting up the net force equations for both block A and B:

F_{Anet} = m_A\cdot a_A = F - F_{fr}\\F_{Bnet} = m_B\cdot a_B = F_{fr}

where forces acting to the left are positive and those acting to the right are negative. The friction force F_fr in the first equation  is due to A acting on B and in the second equation due to B acting on A. They are opposite in direction but have the same magnitude (Newton's third law). We also know that B accelerates 0.5 slower than A:

a_B = a_A-0.5 \frac{m}{s^2}

Now we can solve the system of 3 equations for a_A, a_B and finally for F_fr:

30kg\cdot a_A = 75N - F_{fr}\\24kg\cdot a_B = F_{fr}\\a_B= a_A-0.5 \frac{m}{s^2}\\\implies \\a_A=\frac{87}{54}\frac{m}{s^2},\,\,\,a_B=\frac{10}{9}\frac{m}{s^2}\\F_{fr} = 24kg \cdot \frac{10}{9}\frac{m}{s^2}=\frac{80}{3}kg\frac{m}{s^2}\approx 26.7N

The force of friction acting on block B is approximately 26.7N.

This answer has been verified by multiple people and is correct for the provided values in your question. I recommend double-checking the text of your question for any typos and letting us know in the comments section.

6 0
3 years ago
Read 2 more answers
Where is paramcium normally found?
Scilla [17]
Paramecium<span> can be found in aquatic environments, usually in stagnant, warm water.</span>
8 0
3 years ago
Read 2 more answers
How much tension must a rope withstand if it is used to accelerate 70.0 skier behind a boat at 1.50m/s^2?
SIZIF [17.4K]
It will  be stand 46.67 all i did was divide both numbers but im not sure if im right but i hope i am hope i helped:)
6 0
3 years ago
A soccer player is running upfield at 10m/s and comes to a stop in 3 seconds facing the same direction. What is his acceleration
Mekhanik [1.2K]
The players acceleration is 3.33 m/s/s

Acceleration= Velocity/Time

A =10/3
4 0
3 years ago
Read 2 more answers
The basic methods and techniques used by psychologists to investigate human behavior?
Stels [109]
Telepathy duhh like when SpongeBob stared at Patrick he know they where thinking the same thing or maybe that was because they are both idiots i dont know  <span />
6 0
3 years ago
Other questions:
  • The human ear canal is about 2.9 cm long and can be regarded as a tube open at one end and closed at the eardrum. What is the fu
    13·1 answer
  • Magnetism at the centre of a bar magnet is
    15·1 answer
  • What are the units for mass and volume
    8·1 answer
  • PLZ HELP!!!!
    9·2 answers
  • Momentum of the 2 kg mass moving with velocity 10 m/s is *
    7·1 answer
  • A trough is filled with a liquid of density 810 kg/m3. The ends of the trough are equilateral triangles with sides 8 m long and
    11·1 answer
  • Jan ran 4 miles north in 28 minutes. What was Jan's average velocity?
    8·1 answer
  • four forces act on an object of mass 100kg, they are 12N(N), 70N(S), 33N(E), 10N(w). calculate the reseulting acceleration of th
    5·1 answer
  • The photo shows a pair of figure skaters performing a spin maneuver. The
    9·1 answer
  • When a cannon fires a cannonball we observe Newton's third law. Which is the reaction force? A) The cannon moving forward B) The
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!