Which force is always directed toward the center of a circle?A. normal force
B. nuclear force
C. centrifugal force
D. centripetal force
Answers
This definition of centripetal force is a force acting towards the center of an object moving in a circular motion. Acceleration is the rate of which velocity changes over a period of time. If you pick a point on say a rotating circle and find the tangential velocity at each point it goes through, the acceleration would be towards the middle.
Related Questions
When a substance changes from any state of matter to another it is calleda. sublimation. b. condensation. c. absolute zero. d. a phase change.
Write the different between the fall of a parachute on earth and its fall on the moon?on what condition does a body have free fall?
2x+4y GCF for the polynomial
A parallel-plate air capacitor is made from two plates 0.210 m square, spaced 0.815 cm apart. it is connected to a 120 v battery. if the plates are pulled apart to a separation of 1.63 cm , suppose the battery remains connected while the plates are pulled apart. part a what is the capacitance?
14 m/s
6.0 m/s
16 m/s
Answers
Answer:
Explanation:
Linear Momentum
Two objects of masses and moving in a linear path at speeds and respectively have a total momentum of
When the objects collide, a change of conditions occurs and they start to move at different speeds. The necessary condition to find the after-colliding speeds is the conservation of linear momentum that states the total momentum of an isolated system doesn't change regardless of the internal interactions of the objects. Thus, the new momentum is
And they must be the same, thus
We know both cars stick together after the collision, so the final speed is common to both, and the above formula becomes
Solving for v'
Plugging in the values, we have
Correct option (closest to the computed speed): 14 m/s
ethyl alcohol
water
ammonia
Answers
Answer;
Potassium chloride
Explanation;
- Potassium Chloride is an ionic compound and has ionic bond which is stronger than covalent bond in ethyl alcohol,water ,ammonia, and thus has the highest boiling point .
- ionic bond is a type of bond that results from the transfer of electrons between metallic atoms and non-metallic atoms.
Answers
Explanation:
Uniform velocity is when an object goes an equal amount of space in an equal amount of time whereas non uniform velocity is when the object covers an unequal amount of distance in an equal amount of time.
O static fluid
O fluid friction
O sliding friction
O rolling friction
Answers
The friction which acts on the object that is not moving is static friction, so, option A is correct.
What is friction?
Between two surfaces that are sliding or attempting to slide over one another, there is a force called friction. For instance, friction makes it challenging to push a book down the floor. Friction always moves an object in a direction that is counter to the direction that it is traveling or attempting to move.
Static friction is 0 for an object at rest on a level surface. Static friction generates an equal and opposite force that holds the book at rest if you push horizontally with a small force.
The static friction force grows to meet the force as you push harder. The book eventually moves when the maximum static friction force is reached.
Thus, the friction is static.
To know more about friction:
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hope this helps
Answers
Answer;
The comparison that would be best is;
They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.
Explanation;
- Beryllium (Be) is an element is the periodic table with an atomic number of 4, which means it has 4 protons in the nucleus and also 4 electrons in the energy levels, since the number of protons is equal to the number of electrons.
- Beryllium has an electron configuration of 2: 2, which means it has two valence electrons, and has two energy levels which means it occupies period two of the periodic table, and group two of the periodic table.
- Barium (Ba) on the other had, has an atomic number of 56, which means it has 56 protons and 56 electrons. Thus it has an electron configuration of; 2;8;18;18;8;2; this shows that it has 6 energy levels thus occupies period 6 and is in group two since it has two valence electrons.