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
vampirchik [111]
2 years ago
14

Never heard of this!!

Chemistry
1 answer:
Ksivusya [100]2 years ago
7 0

Answer:

See explanation

Explanation:

a) u= 60 m/s, v= 45 m/s, t = 7 secs

From;

v = u + at

a = v - u/t

a= 45 - 60/7

a = -2.14 m/s^2

b)

u = 200 m/s

v= 235 m/s

t = 30 secs

v = u + at

a = v-u/t

a = 235 - 200/30

a= 1.17 m/s^2

c)

i) Acceleration = 3 - 1/2-0 = 2/2  = 1 m/s^2

ii) The slope between 2 and 5 is zero because velocity was not changing with time.

iii) Within the time between 2 and 5 the speed remained at 3 m/s

iv) the slope between 5 and 8 is 2 - 3/8 - 5 = -1/3 = -0.33m/s^2

v) The negative slope means that velocity is decreasing with time(deceleration).

You might be interested in
What do you think explains why the larger elements are able to form in a supernova explosion? Use evidence from the Supernova 10
lubasha [3.4K]

Larger elements are able to form in a supernova explosion because the star releases very large amounts of energy as well as neutrons, which allows elements heavier than iron to be produced.

<h3>What is Supernova?</h3>

This is referred to the explosion of a star and it resulting in larger elements being formed through a process known as nucleosynthesis and is usually accompanied by an increase in the brightness of the star.

The elements produced are usually larger than elements such as iron and examples include uranium, gold etc.

This is therefore the reason why it was chosen as the most appropriate choice.

Read more about Supernova here brainly.com/question/27492871

#SPJ1

3 0
1 year ago
This graph shows a relationship between the height of a giraffe and its weight. Which term describe the dashed line shown in the
Evgesh-ka [11]

Answer:

line of best fit I guss soo

8 0
3 years ago
Read 2 more answers
in order to make tea, 32,000 J of energy were added to 100.0g of water. what was the temperature Chang of the water? ​
mina [271]

Answer:

ΔT  = 76.5 °C

Explanation:

Given data:

Amount of water = 100.0 g

Energy needed = 32000 J

Change in temperature = ?

Solution,

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Now we will put the values in formula.

Q = m.c. ΔT

ΔT  = Q / m.c

ΔT  = 32000 j/ 100.0 g × 4.184 j/g. °C

ΔT  =  32000 j / 418.4 j /°C

ΔT  = 76.5 °C

5 0
3 years ago
What is the dispersing medium in a colloid??
Alexxandr [17]

Explanation:

A colloid is a heterogeneous mixture whose particle size is intermediate between those of a solution and a suspension. The dispersed particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.

8 0
2 years ago
EXAMPLES OF PURE SUBSTANCES
ser-zykov [4K]

Answer: Water, tin, sulfur, sucrose, salt, and etc.

Explanation: The photo has more examples

3 0
2 years ago
Other questions:
  • One gram of __________ contains more than twice the amount of energy of a gram of glucose.
    13·1 answer
  • Lemonade is an example of a compound because the particles retain their original chemical properties and identity.
    7·1 answer
  • Complete the balancing of this equation ; which shows the reaction between iron and carbon :
    13·1 answer
  • when a solution of sodium chloride is added to a solution of copper(ii) nitrate, no precipitate is observed. Write the molexular
    15·1 answer
  • Sodium bromide equation
    6·1 answer
  • Which best describes the geologic time scale? (choose the best answer from below)
    7·1 answer
  • 83ef0c8
    14·1 answer
  • Which of the following answers correctly describes protons?
    8·2 answers
  • Question 2 Which models of the atom from task 1 are not supported by Rutherford’s experimental evidence? For each of these mod
    10·1 answer
  • The equation for photon energy, E , is
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!