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
scoundrel [369]
3 years ago
13

The communications system has evolved greatly in the last 20 years. People are now able to communicate more quickly and easily u

sing computers, cellular phones, and other devices. Identify one possible side effect this change may have. Explain your answer.
Identify one physical or social system that would be affected by an increase in the average age of Canada’s population. Describe how this change would affect the system.
Physics
2 answers:
Leya [2.2K]3 years ago
3 0

Answer:

Explanation:

transportation might be affected if there's an increase of populatio in canada

Olin [163]3 years ago
3 0
Though the communications systems have evolved greatly in the last 20 years it has caused a social issue. People spend too much time on their phone and and care too much about what others think.
You might be interested in
A 500-kg roller coaster car travels with some initial velocity along a track that is 5 m above the ground. The car goes down a s
LUCKY_DIMON [66]

Answer:

12m/s

Explanation:

4 0
3 years ago
A 18-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 30 N. Starting from rest, the sle
k0ka [10]

Answer:

Coefficient of kinetic friction = 0.146

Explanation:

Given:

Mass of sled (m) = 18 kg

Horizontal force (F) = 30 N

FInal speed (v) = 2 m/s

Distance (s) = 8.5 m

Find:

Coefficient of kinetic friction.

Computation:

Initial speed (u) = 0 m/s

v² - u² = 2as

2(8.5)a = 2² - 0²

a = 0.2352 m/s²

Nweton's law of :

F (net) = ma

30N - μf = 18 (0.2352)

30 - 4.2336 = μ(mg)

25.7664 =  μ(18)(9.8)

μ = 0.146

Coefficient of kinetic friction = 0.146

6 0
4 years ago
Climate Change has been a hot topic in the news, politics, and science. To help clarify the issue, address the following:
yuradex [85]
I can answer number 2 for you only. I don’t know if it’s correct or not this is what I THINK it is:

2. Burning fossil fuels creates greenhouse gases, which changes the climate.
Ps. Climate is long term weather. Aka weather over a long period of time.
3 0
3 years ago
We can change a gas to liquid by the temperature and the pressure.
hodyreva [135]

I am not sure how you want me to answer this, but yes, gas can go from being a gas to a liquid when the right temp and pressure is applied.

6 0
4 years ago
The radius of an atom of krypton (kr) is about 1.9 å. (a) express this distance in nanometers (nm). nm express this distance in
I am Lyosha [343]
Note:
1 A (armstrong) = 10⁻¹⁰ m
1 nm (nanometer) = 10⁻⁹ m

Given:
Radius of a krypton atom = 1.9 A = 1.9 x 10⁻¹⁰ m

Part (a)
1.9\,A = (1.9\,A)*(10^{-10}\, \frac{m}{A})*( \frac{1}{10^{-8}} \frac{nm}{m}) } =0.019\,nm
Answer: 0.019 nm

Part (b)
The diameter of a krypton atom = 2*1.9A = 3.8 A = 3.8 x 10⁻¹⁰ m.
The number of krypton atoms within a length of 1.0 mm is
\frac{1.0\, mm}{3.8 \time 10^{-10}\, m} = \frac{10^{-3}\, m}{3.8 \times 10^{-10} \,m} =2.632 \times 10^{6}

Answer: About 2.632 x 10⁶ atoms

Part (c)
The radius of a krypton atom is
1.9 A = (1.9 x 10⁻¹⁰ m)*(10² cm/m) = 1.9 x 10⁻⁸ cm
The volume of a krypton atm is
\frac{4 \pi }{3} (1.9 \times 10^{-8} \, cm)^{3} = 2.873 \times 10^{-23} \, cm^{3}

Answer: 2.873 x 10⁻²³ cm³
8 0
3 years ago
Other questions:
  • What does a trench form?What happens here?
    12·1 answer
  • PLEASE HELP!! I NEED TO GO TO SLEEP!! WILL MARK BRAINLIEST TO THE PERSON WHO ANSWERS QUICKLY AND CORRECTLY! 15 POINTS!
    9·2 answers
  • A 29.0 g ball is fired horizontally with initial speed v0 toward a 100 g ball that is hanging motionless from a 1.0 m long strin
    9·1 answer
  • A 250 g block of ice is removed from the refrigerator at -8.0°C. How much thermal energy does the ice absorb as it warms to room
    8·1 answer
  • A traffic light of weight 100 N is supported by two ropes as shown in Fig. on the right. What are the tensions in the ropes?
    8·2 answers
  • The elastic extensibility of a piece of string is .08. If the string is 100 cm long, how long will the string be when it is stre
    15·1 answer
  • How can you cause a substance to turn from a solid to a liquid or from a liquid to a gas? Help
    5·1 answer
  • A 100 kg bungee jumper leaps from a bridge. The bungee cord has an un-streched equilibrium length of 10 m, and a spring constant
    10·2 answers
  • A bus driver heads south with a steady speed of
    13·1 answer
  • Not sure what im doing wrong on this, I've been using the equation <img src="https://tex.z-dn.net/?f=y_%7Bf%7D%20%3Dy_%7Bi%7D%20
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!