3 years ago

Witch statement about polymers is true

Physics

1 answer:

Igoryamba3 years ago

3 0

What are the options

You might be interested in

What is a parellogram?

Sergio [31]

Answer:

a four-sided plane rectilinear figure with opposite sides parallel.

3 0

3 years ago

a tire rolls from rest to an angular velocity of 6 radians per second. the angle it turns through is 12 radians. what is the ang

True [87]

Answer:

$\alpha =1.5\ rad/s^2$

Explanation:

Given that,

Initial angular velocity, $\omega_i=0$

Final angular speed, $\omega_f=6\ rad/s$

Angular displacement, $\theta=12\ rad$

We need to find the angular acceleration of the tire. We can find it using the third equation of rotational kinematics. So,

$\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{6^2-0^2}{2\times 12}\\\\\alpha =1.5\ rad/s^2$

So, the angular acceleration of the tire is equal to $1.5\ rad/s^2$ .

7 0

3 years ago

What is the force that opposes motion and works against the downward pull? A) friction B) gravity C) weight D) acceleration

charle [14.2K]

I'm not entirely sure, but I believe it is A Friction. because gravity pulls down, weight isn't a force, and acceleration doesn't oppose motion

6 0

4 years ago

Whos 18 and a boy whos smart and plays sports i need your help<br>message me

zalisa [80]

Answer:

yes

Explanation:

6 0

3 years ago

Dorji weight 1500n.if the total surface area of soles of his feet is 0.5 m2 what is the pressure exerted by his body on the grou

Fantom [35]

Answer:

P = 3000 Pa

Explanation:

Weight of Dorji, W = F = mg = 1500 N

The total surface area of soles of his feet is 0.5 m²

We need to find the pressure exerted by his body on the ground. The pressure is equal to the force acting per unit area. So,

$P=\dfrac{1500\ N}{0.5\ m^2}\\\\=3000\ Pa$

So, the pressure exerted by his body on the ground is 3000 Pa.

3 0

3 years ago