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
Nezavi [6.7K]
3 years ago
14

Why is the crust less dense than the core

Physics
1 answer:
kirill115 [55]3 years ago
5 0
The crust is less dense than the core because the crust isn't under pressure like the core is.
You might be interested in
Two forces are applied to a car in an effort to accel-
mestny [16]

Answer:

R=2F

Explanation:

As the forces are in same direction so the resultant force will be:

R=F+F

R=2F

4 0
3 years ago
A bike travels 4 miles in half an hour, what is its speed?
omeli [17]

Answer:

8 mph

Explanation:

4 miles in half hour so you add 4 more for the second half

3 0
3 years ago
A small box of mass m1 is sitting on a board of mass m2 and length L. The board rests on a frictionless horizontal surface. The
Nadusha1986 [10]

Answer:

The constant force with least magnitude that must be applied to the board in order to pull the board out from under the box is \left( {{m_1} + {m_2}} \right){\mu _{\rm{s}}}

Explanation:

The Newton’s second law states that the net force on an object is the product of mass of the object and final acceleration of the object. The expression of newton’s second law is,

\sum {F = ma}

Here, is the sum of all the forces on the object, mm is mass of the object, and aa is the acceleration of the object.

The expression for static friction over a horizontal surface is,

F_{\rm{f}}} \leq {\mu _{\rm{s}}}mg

Here, {\mu _{\rm{s}}} is the coefficient of static friction, mm is mass of the object, and g is the acceleration due to gravity.

Use the expression of static friction and solve for maximum static friction for box of mass {m_1}

Substitute  for in the expression of maximum static friction {F_{\rm{f}}} = {\mu _{\rm{s}}}mg

{F_{\rm{f}}} = {\mu _{\rm{s}}}{m_1}g

Use the Newton’s second law for small box and solve for minimum acceleration aa to pull the box out.

Substitute  for , [/tex]{m_1}[/tex] for in the equation .

{F_{\rm{f}}} = {m_1}a

Substitute {\mu _{\rm{s}}}{m_1}g for {F_{\rm{f}}} in the equation {F_{\rm{f}}} = {m_1}a

{\mu _{\rm{s}}}{m_1}g = {m_1}a

Rearrange for a.

a = {\mu _{\rm{s}}}g

The minimum acceleration of the system of two masses at which box starts sliding can be calculated by equating the pseudo force on the mass with the maximum static friction force.

The pseudo force acts on in the direction opposite to the motion of the board and the static friction force on this mass acts in the direction opposite to the pseudo force. If these two forces are cancelled each other (balanced), then the box starts sliding.

Use the Newton’s second law for the system of box and the board.

Substitute for for in the equation .

{F_{\min }} = \left( {{m_1} + {m_2}} \right)a

Substitute for in the above equation .

{F_{\min }} = \left( {{m_1} + {m_2}} \right){\mu _{\rm{s}}}g

The constant force with least magnitude that must be applied to the board in order to pull the board out from under the box is \left( {{m_1} + {m_2}} \right){\mu _{\rm{s}}}g

There is no friction between the board and the surface. So, the force required to accelerate the system with the minimum acceleration to slide the box over the board is equal to total mass of the board and box multiplied by the acceleration of the system.

5 0
3 years ago
Which action best demonstrates the transformation of mechanical energy to heat energy and sound energy?
MrMuchimi

Answer:

striking a hammer on a nail

7 0
3 years ago
How would you solve for x I cant remember right now 4x+6x=9x-10
-Dominant- [34]
Combine all of the x's on one side of the equation and then finish the problem!
8 0
2 years ago
Read 2 more answers
Other questions:
  • A twig from a tree drops from a 200m high cliff on to a beach below.during its fall 40% twig's energy is converted into thermal
    10·1 answer
  • In order for a reaction to begin, what is required?
    5·2 answers
  • How could the position data from a motion sensor be used to create a velocity--time graph?
    8·1 answer
  • A man pulls a sled at a constant velocity across a horizontal snow surface. if a force of 80 n is being applied to the sled rope
    6·2 answers
  • If an object is accelerating, can the net force acting on it be zero?
    10·2 answers
  • If an upstairs room is warmer than downstairs, is that a example of convection, conduction, or radiation?
    14·1 answer
  • A generator makes 3.45 kilojoules (kJ) of energy during each minute of
    11·1 answer
  • A student is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline. What are
    7·1 answer
  • Suppose you find yourself in a spaceship in a uniform circular orbit around a star. Suppose also that that star is going to lose
    5·1 answer
  • A chef fills 50cm3 container with 250g of cooking oil what is the density of the oil?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!