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
solniwko [45]
4 years ago
8

Insulating materials are rated by their _____. specific heat heat index r-value temperature resistance

Physics
2 answers:
jeka57 [31]4 years ago
4 0

Answer: Option (c) is the correct answer.

Explanation:

The difference in temperature when per unit of heat flux is required by one unit of heat flux between a barrier of warmer and colder surface present in steady state condition is known as R-value.

Mathematically,       R-value = \frac{\text{Temperature difference}\times \text{Area}\times \text{Time}}{Heat loss}

Thermal resistance of insulating products or materials can be known with the help of R-value. As more is the r-value of a substance more will be its insulating power.

Therefore, we can conclude that insulating materials are rated by their r-value.

Leokris [45]4 years ago
3 0
That would be the R-value
You might be interested in
I’ll name u BRAINLIEST if u get this right
nekit [7.7K]
V = m1 u1 - m2 u2 / m1
v = 0.01 * 500 - 2 * 1.4 / 0.01
v = 220 m/s
7 0
3 years ago
1: A car traveling at 10 m acceleration uniformly at 2 m. Calculate its velocity after5 s.
s344n2d4d5 [400]

Answer:

20 m/s

Explanation:

v = u + at

v: final velocity

u: initial velocity

a: acceleration

t: time

v = 10 + 2(5)

v = 10 + 10

v = 20 m/s

4 0
4 years ago
3) A tolley of mass 4kg, moving with a velocity
Leokris [45]

Answer:

3.57 m/s

Explanation:

The sum of the 2 momentums Is equal the finale momentums. so if momentums Is q, v Is velocity and m Is Mass, q3=m1*v1+m2**v2=16+9=25 m*kg/s

q3=m3*v3

v3=q3/m3=25/(4+3)=3.57m/s

8 0
3 years ago
Vector A has magnitude 13.0 m and vector B has magnitude 16.0 m. The scalar product A.B is 116 m2. What is the magnitude of the
Elan Coil [88]

Answer:

\text{Vector product}=172.66\ m^2

Explanation:

Given that,

The magnitude of vector A, |A|=13\ m

The magnitude of vector B, |B|=16\ m

Scalar product of A and B, A{\cdot} B=116\ m^2

The formula for the scalar product is given by :

A{\cdot} B=|A||B|\cos\theta

Where, \theta is the angle between A and B.

\cos\theta=\dfrac{116}{13\times 16}\\\\\theta=\cos^{-1}\left(0.5576\right)\\\\\theta=56.11^{\circ}

The formula for the vector product is given by :

A\times B=|A||B|\sin\theta\\\\=13\times 16\times \sin56.11\\\\=172.66\ m^2

So, the vector product between these two vectors is 172.66\ m^2.

6 0
3 years ago
What type of wave vibrates parallel to the direction of travel
Irina-Kira [14]

Answer: Longitudinal waves

Explanation: For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport

5 0
3 years ago
Other questions:
  • The question and options are in the photo
    15·1 answer
  • In mathematics, the Nth harmonic number is defined to be 1 1/2 1/3 1/4 ... 1/N. So, the first harmonic number is 1, the second i
    9·1 answer
  • You are testing a new amusement park roller coaster with an empty car with a mass of 108kg. One part of the track is a vertical
    10·1 answer
  • Water has a density of 1.0 g/cm3. What is the mass of 10.0 cm3 of water?
    9·1 answer
  • a spring with an unknown force constant is compressed as shown. If the original length of the spring is 60cm, determine (a)the s
    13·1 answer
  • ANSWER ASAP . Which of the screws below requires the least amount of effort force to turn?
    8·2 answers
  • On the sonometer shown below, a horizontal cord of length 5 m has a mass of 1.45 g. When the cord was plucked the wave produced
    10·1 answer
  • 11. An object moves in circular path with constant speed
    6·1 answer
  • Power lines often carry high voltages. For example, a single power line may carry 100,000 volts. An outlet in a home only carrie
    10·2 answers
  • Explain 10 benefits of aerobic dances in essay form
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!