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3 years ago

Which of the following is a phase change?

1 answer:

4 0

An events could be considered as a phase change if it got a transformation between liquid, solid, and gas.

From the option above, the one that is a phase change is : Ice melting ( from solid to liquid)

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Name one contact force and one force that acts through a force field

nirvana33 [79]

A contact force is a type of force which act on an object by coming in contact with the object. Examples of contact force that acts through a force field are: applied force, frictional force, air resistance force, tension, spring force, etc.
Examples of forces that act through a force field are gravitational force, electromagnetic force, the weak interaction and the strong interaction.

5 0

3 years ago

What are the set of equations called that can be used to quantify motion in the case of uniform acceleration?

KATRIN_1 [288]

The kinematic equations are used to <span>quantify motion in the case of uniform acceleration.

The other name is : SUVAT equations, where the letters signify:
displacement (s),
initial velocity (u),
final velocity (v),
acceleration (a), and
time (t).

There are three equations are attached in the picture: </span>

7 0

3 years ago

BARSIC [14]

Answer:

The correct answer is Tor buni aga daka pagli Tor buda mu tor buni kaitam chai ami

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2 years ago

During the launch from a board, a diver's angular speed about her center of mass changes from zero to 8.10 rad/s in 240 ms. Her

Artemon [7]

Answer:

Part a)

$\alpha = 33.75 rad/s^2$

Part b)

$\tau = 391.5 Nm$

Explanation:

Part a)

Average angular acceleration is given as rate of change in angular speed

so it is given as

$\alpha = \frac{\omega_f - \omega_i}{\Delta t}$

$\alpha = \frac{8.10 - 0}{240\times 10^{-3}}$

$\alpha = 33.75 rad/s^2$

Part b)

average external torque is given as

$\tau = I\alpha$

here we know that

$I = 11.6 kg m^2$

$\tau = 11.6 \times 33.75$

$\tau = 391.5 Nm$

6 0

2 years ago

The Atomic Mass of an element is

dedylja [7]

Answer:

C) A ratio based on the mass of a carbon-12 atom

Explanation:

For each element, there is a characteristic number of protons, this number represent a type of atom and its called the atomic number

On the other hand we have the number of neutrons, and for one element which difers only on the number of neutrons, we have different isotopes from one element.

Together, protons and neutrons define the mass number

One property linked with the mass number, is the atomic mass, which is formerly expressed as "uma" (atomic mass unit)

By definition, one atom of carbon-12 (with 6 neutrons) has an atomic mass of 12 umas

6 0

3 years ago

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