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3 years ago

If anyone could answer my question , please help -,- xD

2 answers:

6 0

Kinematics is the branch of mechanics concerned with the motion of objects without the reference to the forces which cause the motion.

Paraphin [41]3 years ago

5 0

Kinematics is the study of motion, without any reference to the forces that cause the motion. It basically means studying how things are moving, not why they're moving. It includes concepts such as distance or displacement, speed or velocity, and acceleration, and it looks at how those values vary over time.

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Which kind of intermolecular force attracts the stearate ion to the oil drop?

Alchen [17]

The intermolecular force attracts of the stearate ion in the oil drop.

Explanation:

Dispersion force is the intermolecular force that attracts the stearate ion to the oil drop. The weak force with temporary dipoles. This force is referred to as induced dipole attraction.
The Dispersion is meant as an electron in two atoms occupies the position and this force is called induced dipole attraction.
The Dispersion force depends on the atomic and molecular weight of the material.

5 0

2 years ago

At t =0 one toy car is set rolling on a straight track with intial position 17.0 cm , intial velocity -3 cm/s, and constant acce

Katena32 [7]

Answer:

a) 5.65 s

b) 5cm/s

c) They will pass each other at both 1.1168 s and 5.84s

d)15.084cm and 38.7 cm

Explanation:

For part A, you need to keep in mind that acceleration is the rate of change of velocity per unit of time. For a constant acceleration, this can be told in this way:

$a = \frac{v - v_o}{t}$

Reordering this equation, we can get v in terms of the initial velocity, the acceleration, and the time elapsed:

$v = at + v_o$

Now, we can get the expressions for velocity of each toy car, and equalize them:

$v_1 =a_1t + v_o_1\\v_2 =a_2t + v_o_2\\v_1 = v2\\a_1t +v_o_1 =a_2t + v_o_2\\(a_1 - a_2)t = v_o_2 - v_o_1\\t = \frac{v_o_2 - v_o_1}{a_1 - a_2} = \frac{5cm/s - (-3cm/s)}{2.3 cm/s^2 - 0 cm/s^2}= 3.47 s$

As toy car has no acceleration and, therefore, constant speed, both car will have the same speed when toy car 1 reaches this velocity = 5cm/s

c) The position of car 1, as it follows a constant acceleration motion, is given by this equation:

$x_1 = \frac{1}{2}a_1t^2 + v_o_1t + x_o_1$

The position for car 2, as it has constant velocity, is given by this equation:

$x_2 = v_2t + x_o_2$

We equalize both equation to find the time where the cars pass each other:

$x_1 = x_2\\\frac{1}{2}a_1t^2 + v_o_1t + x_o_1 = v_2t+x_o_2\\\frac{1}{2} a_1t^2 + (v_o_1 - v_2)t + x_o_1 - x_o_2 = 0\\\frac{1}{2}2.3m/s^2t^2 +(-3cm/s-5cm/s)t+ 17cm - 9.5cm = 0\\1.15t^2 -8t + 7.5 = 0 | a = 1.15, b = -8, c = 7.5\\t = \frac{-b +-\sqrt{b^2 - 4ac}}{2a} = 5.84s | 1.1168 s$

The car will pass each other at both 1.1168s and 5.84s.

For the positions, we solve any of the position equation with the solutions:

$x = v_2*t + x_o_2 = 5cm/s *5.84s + 9.5cm = 38.7 cm\\x = 5cm/s * 1.1168s + 9.5cm = 15.084 cm$

4 0

3 years ago

How many changes of state are shown? 0 1 2 3

ivann1987 [24]

Answer: 2

I just took the test.

You’re welcome

7 0

2 years ago

Read 2 more answers

These are equal and opposite forces that do not cause a change in position or motion. True or False

Contact [7]

Answer:

TRUE

Explanation:

Balance forces are usually defined as the two distinct force that acts on an object but in opposite directions. These two acting forces are equal in size or magnitude. When this type of force is applied on any object, it signifies that the object is stationary or it is moving at a constant speed and in the same direction.

This force is comprised of two most important properties namely the strength and direction. When any of the two forces is higher then it result in the motion of the object.

Thus, the above given statement is TRUE.

3 0

3 years ago

5. A current of 3.00 A flows through a resistor when it is connected

viktelen [127]

I think it is D
Hope my answer help you?

7 0

2 years ago