NaCl solid is an example of a/an<br> A. Insulator<br> B. Conductor<br> OC. Nonmetal<br> D. Metalloid

After fixing a flat tire on a bicycle you give the wheel a spin. If its initial angular speed was 6.36 rad/s and it rotated 14.7

lesya692 [45]

To solve this problem we will apply the concepts related to the cinematic equations of angular motion. On these equations, angular acceleration is defined as the squared difference of angular velocity over twice the radial displacement. This is mathematically:

$\alpha = \frac{\omega^2-\omega_0^2}{2\theta}$

Our values are,

$\text{Initial angular velocity} = \omega_0 =6.36 rad/s$

$\text{Final angular velocity} = \omega =0$

$\text{Angular displacement} = \theta = 14.7rev = 29.4\pi rad$

Replacing,

$\alpha = \frac{- 6.36^2}{29.4\pi}$

$\alpha = -0.43rad/s^2$

Therefore the angular acceleration is $-0.43rad/s^2$

4 0

3 years ago

A ball is thrown upward. After reaching a

Triss [41]

Answer:

9.0 m/s

Explanation:

The problem can be solved by using the following suvat equation:

$v=u+at$

where

v is the final velocity

u is the initial velocity

$a=g=-9.8 m/s^2$ is the acceleration of gravity

t is the time

When the ball reaches the maximum height, the velocity becomes zero. If we consider this as initial point of the motion, we can write

u = 0

The time it takes for the ball to go down from the maximum heigth to the ground is half the total time, so

$t=\frac{1.84s}{2}=0.92 s$

And solving the formula for v, we find the final velocity:

$v=0+(-9.8)(0.92)=-9.0 m/s$

So, the final speed is 9.0 m/s.

3 0

4 years ago

Determine if the object would move or not

lorasvet [3.4K]

I don't see a picture

4 0

3 years ago

One person drives 60,000 miles in a car that averages 30 miles per gallon (mpg), while another person drives 60,000 miles in a c

Solnce55 [7]

Answer:

20000 pounds

Explanation:

Generally 1 gallon of fuel burnt gives of 20 pounds of CO₂

Difference in the gallons of fuel burnt

$\dfrac{60000}{20}-\dfrac{60000}{30}=1000\ gal$

The 20 mpg car burns 1000 gallons of fuel more than the 30 mpg car

The amount of CO₂ would be

$1000\times 20=20000\ pounds$

The fewer pounds that the 30 mpg car would release is 20000 pounds

4 0

3 years ago

Consider the following forces. (1) frictional (2) gravitational (3) tension (4) strong nuclear (5) normal (6) electroweak which

Scorpion4ik [409]

The forces listed are considered fundamental forces (2) gravitational (4) strong nuclear (6) electroweak.

Fundamental force, also called fundamental interaction, in physics, is any of the four primary forces—gravitational, electromagnetic, sturdy, and weak—that govern how gadgets or particles interact and how certain particles decay. All of the regarded forces of nature may be traced to those essential forces.

Now, physicists say they have discovered viable symptoms of a fifth essential force of nature. The findings come from studies performed at a laboratory near Chicago. The four fundamental forces govern how all of the objects and particles inside the Universe engage with each other.

The strong nuclear pressure pulled definitely and negatively charged quarks collectively to form undoubtedly charged protons and neutrally charged neutrons. The strong nuclear force also binds protons and neutrons within the nucleus of atoms. The weak nuclear force enabled complicated atoms to form through nuclear fusion.

Learn more about the fundamental forces here brainly.com/question/910002

#SPJ4

4 0

2 years ago

NaCl solid is an example of a/an A. Insulator B. Conductor OC. Nonmetal D. Metalloid