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
Anton [14]
3 years ago
7

How can knowing a chemical property such as flammability help you to use a product safely?

Physics
1 answer:
aleksandrvk [35]3 years ago
5 0

Answer:

When a substance burns, it produces new substances during a chemical change. Therefore, whether or not a substance is flammable is a chemical property. Knowing which substances are flammable helps you to use them safely. Another chemical property is how compounds react to light

You might be interested in
Which particle is commonly used to initiate a fission chain reaction
Snezhnost [94]
Neutron is commonly used to initiate a fission chain reaction.
5 0
3 years ago
Given a particle that has the velocity v(t) = 3 cos(mt) = 3 cos (0.5t) meters, a. Find the acceleration at 3 seconds. b. Find th
DiKsa [7]

Answer:

a.\rm -1.49\ m/s^2.

b. \rm 50.49\ m.

Explanation:

<u>Given:</u>

  • Velocity of the particle, v(t) = 3 cos(mt) = 3 cos (0.5t) .

<h2>(a):</h2>

The acceleration of the particle at a time is defined as the rate of change of velocity of the particle at that time.

\rm a = \dfrac{dv}{dt}\\=\dfrac{d}{dt}(3\cos(0.5\ t ))\\=3(-0.5\sin(0.5\ t.))\\=-1.5\sin(0.5\ t).

At time t = 3 seconds,

\rm a=-1.5\sin(0.5\times 3)=-1.49\ m/s^2.

<u>Note</u>:<em> The arguments of the sine is calculated in unit of radian and not in degree.</em>

<h2>(b):</h2>

The velocity of the particle at some is defined as the rate of change of the position of the particle.

\rm v = \dfrac{dr}{dt}.\\\therefore dr = vdt\Rightarrow \int dr=\int v\ dt.

For the time interval of 2 seconds,

\rm \int\limits^2_0 dr=\int\limits^2_0 v\ dt\\r(t=2)-r(t=0)=\int\limits^2_0 3\cos(0.5\ t)\ dt

The term of the left is the displacement of the particle in time interval of 2 seconds, therefore,

\Delta r=3\ \left (\dfrac{\sin(0.5\ t)}{0.05} \right )\limits^2_0\\=3\ \left (\dfrac{\sin(0.5\times 2)-sin(0.5\times 0)}{0.05} \right )\\=3\ \left (\dfrac{\sin(1.0)}{0.05} \right )\\=50.49\ m.

It is the displacement of the particle in 2 seconds.

7 0
4 years ago
A skateboarder is moving 5.25 m/s when he starts to roll up a frictionless hill. How much higher is he when his velocity has red
Taya2010 [7]
Mechanical energy E = mgh + 1/2mv²

When he starts, let h = 0 ⇒ E₁ = 1/2mv₁²
When he reaches height h ⇒ E₂ = mgh + 1/2mv₂²

Without friction, energy is conserved at all times.

E₁ = E₂
     ↓
1/2mv₁² = mgh + 1/2mv₂²
     ↓
1/2v₁² = gh + 1/2v₂²
     ↓
gh = 1/2(v₁² - v₂²)
    ↓
h = (v₁² - v₂²) / (2g)


5 0
4 years ago
Read 2 more answers
how are the laws of superposition and cross-cutting relationships used to determine the related ages of rocks
Naily [24]
So you say that is it came to the world and its vanished to the world
6 0
3 years ago
average cost of of 7cent per kilowatt hour what would be the cost of burning a 40 W bulb for 8 hours per night for 14 nights sho
nordsb [41]
40 Watts @ 8hrs x 14 = 4480/1000 = 4.48
4.48 * 0.07 = 0.3136 cents.

7 0
4 years ago
Other questions:
  • A radioisotope is place near a radiation detector, which registers 80 counts per second. Eight hours later, the detector registe
    12·1 answer
  • A capacitor is connected to an ac generator that has a frequency of 2.3 kHz and produces a rms voltage of 1.5 V. The rms current
    14·1 answer
  • Find the radius R of the orbit of a geosynchronous satellite that circles the Earth. (Note that R is measured from the center of
    10·1 answer
  • And aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second taking the speed of sound as 1100 km/h at the air
    12·1 answer
  • Tycho Brahe built telescopes better than anyone and used them for astronomical
    9·2 answers
  • What would happen if there were no decomposer?
    13·2 answers
  • What particular problem is the topic of the essay and what is the author’s main contention about how the Constitution addresses
    12·1 answer
  • A car that increase its speed from 20 km/h to 100 km/h undergoes -------acceleration,
    6·1 answer
  • The process of testing a hypothesis by collecting data is called
    13·2 answers
  • Explain how the magnitude of the gravitational force between the earth and the sun changes as the earth moves from position 'A'
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!