All categories

4 years ago

Which one of the following statements is true? Explain.

Physics

1 answer:

Makovka662 [10]4 years ago

5 0

Answer:

All the given option is false.

Explanation:

This is not true for all the materials like composite because the Poisson ratio for composite material can be negative that is why positive tensile stress may produce positive lateral strain.

This is not true for all the material because the Poisson ratio for some material can be positive that is why positive tensile stress may produce negative lateral strain.

The explanation is same as option A.

This is not true for all the materials ,It is valid only up to elastic limit .After the elastic limit the strain and stress does not follow linear path.

This is not true for all the materials because some materials like composite is having negative value of Young's modulus.

Therefore all the given option is false.

You might be interested in

Two children, Ahmed and Jacques, ride on a merry-go-round. Ahmed is at a greater distance from the axis of rotation than Jacques

Alex

Answer:

A. Ahmed has a greater tangential speed than Jacques.

D. Jacques and Ahmed have the same angular speed.

Explanation:

Kinematics of the merry-go-round

The tangential speed of the merry-go-round is calculated using the following formula:

v = ω*R

Where:

v is the tangential speed in meters/second (m/s)

ω is the angular speed in radians/second (rad/s)

R is the angular speed in meters (m)

Data

dA = RA : Ahmed distance to the axis of rotation

dJ = RJ : Jacques distance to the axis of rotation

Problem development

We apply the formula (1)

v = ω*R

vA= ω*RA : Ahmed tangential speed

vJ= ω*RJ : Jacques tangential speed

Ahmed is at a greater distance from the axis of rotation than Jacques, then,

RA ˃ RJ and Ahmed and Jacques have the same speed ω, then:

vA ˃ vJ

6 0

3 years ago

Can someone plz help me with this question, who ever answers I will give brainliest............

liberstina [14]

50 millimeters i think...

3 0

3 years ago

FM radio stations use different frequencies. For

Ratling [72]

Answer:

89.5 Hz

Explanation:

The relationship between the frequency and the wavelength is given by the following formula:

$\lambda = \frac{c}{f}\\\\$

where,

f = frequency

c = speed of light

λ = wavelength

Since the speed of light is constant. Therefore the formula suggests an inverse relationship between the frequency and the wavelength. Hence, the station with the lowest frequency will have the longest wavelength.

Therefore, the answer is:

8 0

3 years ago

draw conclusions on the relative densities of liquid water and ice . which is more dense and how do you know . what non-mathemat

adoni [48]

Well ice would be less dense, as water freezes it expands which would reduce density and you can tell just by putting ice cubes in water

7 0

4 years ago

The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at it

aleksklad [387]

Answer:

The total Mechanical energy will be zero

Explanation: Escape velocity is the velocity required by a free object in order to overcome the impact of the force of gravity. The total mechanical energy of an object is the total energy possessed by an object which includes its kinectic and potential energy.

since the object is moving at an escape velocity which is 11.2m/s the object will be assumed to be weightless

Etotal = kinetic energy + potential energy

kinetic energy= 1/2*M*V*V

Potential energy=MGH

Etotal=1/2*0*11.2*11.2+0*0*0

Etotal=0+0

Etotal=0.

3 0

3 years ago