All categories

3 years ago

What is the mass of 2.00 L of pure water?

1 answer:

7 0

In order to determine the mass of a given volume, it is important to know the density of the substance. <span>Density is a physical property of a substance that represents the mass of that substance per unit volume. For water, we can assume 1000 g/ L. Therefore, the mass is 1000 g/L ( 2.00 L ) = 2000 g.</span>

You might be interested in

How much energy is required to increase the temperature of

Basile [38]

Explanation:

Q=msdt

= 2 x 128 x (7-4)

=256 x 3

= 768 J

6 0

3 years ago

An electron is released from rest at the negative plate of a parallel-plate capacitor. If the distance across the plate is 2.0 m

ddd [48]

Answer:

Velocity of electron will be $1.325\times 10^6m/sec$

Explanation:

We have given distance across the plate d = 2 mm $=2\times 10^{-3}m$

Potential difference V = 6 volt

We know that potential difference at any distance is given by

V = Ed , here V is potential difference, E is electric field and d is distance

So $E=\frac{V}{d}=\frac{6}{2\times 10^{-3}}=3000N/C$

Charge on electron $e=1.6\times 10^{-19}C$

We know that expression of velocity is given by $v=\sqrt{\frac{2qEd}{m_e}}$ , here q is charge on electron, E is electric field and d is distance

So $v=\sqrt{\frac{2\times 1.6\times 10^{-19}\times 3000\times 3000}{9.11\times 10^{-31}}}=1.325\times 10^6m/sec$

8 0

4 years ago

What does the spinal cord on a sheep brain do

Leviafan [203]

Cerebellum: controls balance and muscle coordination; located caudal to the cerebrum in the sheep brain. ... Gray matter: areas of the brain and spinal cord containing neuronal cell bodies, dendrites, and unmyelinated axons. Found in the cerebral cortex of the brain and inner area of the spinal cord

7 0

3 years ago

Read 2 more answers

Consider the reaction X mc022-1.jpg Y + 2Z . If the molar solubility of X is multiplied by 2, the value of Ksp will be multiplie

Alex777 [14]

X -> Y + 2Z

So there are 2 different particles. 1 mol of X produces 1 mol of Y and 2 moles of Z.

Kps = [Y] [Z]^2

We will call “s” (solubility) the molarity of X

So the molarity of Y+ is also “s” (same number)

And the molarity of Z is “2s” (twice as much)

Kps = s*(2s)^2 = s*4s^2=4s^3

If s is multiplied by 2:

Kps = 4*(2s)^3=4*2^3*s^3=4*8*s^3

So Kps is multiplied by 8.

4 0

4 years ago

g A has all the mass at the rim, while wheel B has the mass uniformly distributed, like a solid disk. The wheels have the same m

marishachu [46]

Answer:

The second wheel

Explanation:

The torque is given by

$\tau=I\alpha$ (1)

where I is the moment of inertia and a is the angular acceleration. If we take into account the moment of inertia of a disk and a ring ()for the first wheel) we have:

$I_r=mR^2\\I_d=\frac{1}{2}mR^2$

where we used that both wheel have the same mass. By replacing in (1) we obtain:

$\alpha_r=\frac{\tau}{I_r}=\frac{\tau}{mR^2}\\\alpha_d=\frac{\tau}{I_d}=\frac{\tau}{\frac{1}{2}mR^2}=2\alpha_r\\$

Hence, the second wheel (the disk) has a greater acceleration.

hope this help!!

5 0

4 years ago

Read 2 more answers