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4 years ago

Does sugar dissolve faster in cold water or hot water? Explain your answer.

Physics

1 answer:

gladu [14]4 years ago

6 0

Sugar dissolves faster in hot water because, the higher the temperature the faster the molecules move.

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define atmospheric pressure, prove that presence of atmospheric pressure with the help of an activity

Anton [14]

I don understand this?

8 0

3 years ago

Two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere if the magnit

Snowcat [4.5K]

Answer:

894 electrons

Explanation:

The electrostatic force between the two charges is given by:

$F=\frac{k q_1 q_2}{r^2}$

where we have

$F=4.57\cdot 10^{-21} N$ is the force

k is the Coulomb's constant

q1 = q2 =q is the magnitude of the charge on each sphere

r = 20.0 cm = 0.20 m is the distance between the two spheres

Substituting and solving for q, we find the charge on each sphere:

$q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(4.57\cdot 10^{-21} N)(0.20 m)^2}{9\cdot 10^9 Nm^2C^{-2}}}=1.43\cdot 10^{-16} C$

And since each electron has a charge of

$e=1.6\cdot 10^{-19}C$

the net charge on each sphere will be given by

$q=Ne$

where N is the number of excess electrons; solving for N,

$N=\frac{q}{e}=\frac{1.43\cdot 10^{-16}C}{1.6\cdot 10^{-19}C}=894$

7 0

4 years ago

Clearly distinguish between mass, weight, and volume.

USPshnik [31]

The mass tells you the amount of matter or substance that makes up an object.

The weight tells you the measure of the matter.

The volume tells you the amount of space/size taken up

6 0

4 years ago

the gravitational force exerted on a baseball is 2.21 N down, a pitcher throws the ball horizontally with velocity 18.0 m/s by u

Ilia_Sergeevich [38]

To have a weight of 2.21N., the ball's mass is (2.21/9.8) = .226kg.
a) d = 1/2 (vt), = 1/2 (18 x .17), = 1.53m. 
b) Acceleration of the ball = (v/t), = 18/.17, = 105.88m/sec^2. 
f = (ma), = .226 x 105.88, = 23.92N.

8 0

4 years ago

Read 2 more answers

Black smokers are hot volcanic vents that emit smoke deep in the ocean floor. Many of them teem with exotic creatures, and some

erica [24]

If the density of water does not vary and the vents range in depth from about 1500 m to 3200 m below the surface, then the gauge pressure at a 2452-m deep vent is 224.268 atm.

Calculation:

Step-1:

It is given that the vents range in depth from about 1500 m to 3200 m below the surface. If we are assuming that the density of water does not vary. Then it is required to calculate the gauge pressure at a 2452-m deep vent.

The gauge pressure at a particular depth of ocean water is calculated as:

$P=\rho g h$

Here $\rho$ is the density of water, P is the required pressure, h is the depth of water, and g is the gravitational acceleration.

Step-2:

Now we are substituting the values to calculate the pressure at the depth of 2452-m.

$\\\begin{aligned}\\P&=\rho gh\\&=1030 (\text{ kg/m}^3)\times 9.8 (\text{ m/s}^2)\times 2452 \text{ m}\\&=24.75\times 10^6 \text{ Pa}\times\frac{1 \text{ atm}}{10.1325 \times10^4 \text{ Pa}}\\&=224.268 \text{ atm}\\\end{aligned}\\$

Learn more about gauge pressure here,

brainly.com/question/14012416

#SPJ4

5 0

2 years ago