The proce ss by which a solid changes to a liquid is

at a certain instant an object is moving to the right with speed 1.0 m/s and has a constant acceleration to the left of 1.0 m/s^

chubhunter [2.5K]

For this problem, you would use the equation v=u+at. In this case, u=1 v=0 (when the object is at rest) a=-1
v=u+at
0=1+(-1)t
t=1 second

3 0

4 years ago

Unpolarized light passes through two ideal Polaroid sheets. The axis of the first is vertical and the axis of the second is at 3

andrew-mc [135]

Answer:

63.78%

Explanation:

The equation that relates the angle of the polarization and the intensity of ligth transmitted is I=Io*cos²(x), where I is the intensity of the incident light, Io is the intensity of the transmitted light, and x is the angle of polarization. The fraction of incident light will be I/Io, so the answer in given by cos²(37) = 0.6378

3 0

3 years ago

Which statement is supported by the information in the diagram and table below?

Natasha_Volkova [10]

Answer:

a

Explanation:

a

5 0

3 years ago

A plane is landing. It started at 400m/s and ended up at 50m/s after 30 seconds. What is it's acceleration?

quester [9]

Give u = start velocity

v = end velocity

v = u + at

50 = 400 + a*30

30a = -350

a = -116.67 m/ $s^{2}$

**Why the accecleration is negative number**

Because displacement, velocity, and acceleration are VECTOR QUANTITIES.

Vector Quantity must have direction.

4 0

3 years ago

It is important to understand the differences between chemical and physical changes. Chemical changes result in new substances,

sergiy2304 [10]

Explanation:

Other characteristics of these changes are:

Physical changes are easily reversible but chemical changes are not.

Physical changes involves no change in mass like chemical changes.

Physical changes require little energy unlike chemical changes.

Water turns to steam when boiled over a Bunsen burner Physical change

This is a physical change of state. It is called evaporation. Here, hydrogen bonds between each water molecules are broken and they turn to gases in steam phase.

H₂O $_{l}$ → H₂O $_{g}$

Carbon combines with oxygen to form carbon dioxide gas Chemical change

This is a typical chemical change":

C + O₂ → CO₂

A new product is formed and this reaction is not easily reversible.

Water breaks down into hydrogen and oxygen gases. Chemical change

This is also a chemical change in which new products are formed:

H₂O → H₂ + O₂

Limestone breaks down into lime and carbon dioxide when heated Chemical change

This is a chemical change as new product forms:

CaCO₃ → CaO + CO₂

Learn more:

Chemical change brainly.com/question/9388643

#learnwithBrainly

5 0

3 years ago