3 years ago

Which could be true about an unknown sample with a pH of 7?

Physics

1 answer:

Lynna [10]3 years ago

3 0

Answer:

It's neutral.

Explanation:

Neutral has an equal proportion of acid and alkali which makes the pH between 0-14 which is 7.

You might be interested in

An object has an acceleration of 6.0 m/s/s. if the net force acting upon this object were doubled, then its new acceleration wou

Flauer [41]

F has direct relation with a
then doubling F cause acc. to get double i:e 6×2=12

5 0

4 years ago

What charge do electrons have?<br> A. no charge<br> B. a positive charge<br> C. a negative charge

Mandarinka [93]

Electrons have a negative charge.

5 0

2 years ago

PLZ HELP I HAVE NO TIME AND NEED SOMEONE WHO KNOWS ABOUT THE BOOK CALLED THE LEGEND OF SLEEPY HOLLOW

kirza4 [7]

I know about sleepy hollow

3 0

3 years ago

Susan's 10.0kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30? above the f

elena-s [515]

Answer:

The speed after being pulled is 2.4123m/s

Explanation:

The work realize by the tension and the friction is equal to the change in the kinetic energy, so:

$W_T+W_F=K_f-K_i$ (1)

Where:

$W_T=T*x*cos(0)=32N*3.2m*cos(30)=88.6810J\\W_F=F_r*x*cos(180)=-0.190*mg*x =-0.190*10kg*9.8m/s^{2}*3.2m=59.584J\\ K_i=0\\K_f=\frac{1}{2}*m*v_f^{2}=5v_f^{2}$

Because the work made by any force is equal to the multiplication of the force, the displacement and the cosine of the angle between them.

Additionally, the kinetic energy is equal to $\frac{1}{2}mv^{2}$ , so if the initial velocity $v_i$ is equal to zero, the initial kinetic energy $K_i$ is equal to zero.