The table below compares the solubility of two substances in 100 milliliters (mL) of water.


SOLUBILITY OF SUBSTANCES

Solubility Temperature l Sucrose l Hydrochloric acid
l Grams/100mL water l Grams/100mL water
--------------------------------------------------------------------------------------------------------
Solubility at 20°C l 204 l 720
--------------------------------------------------------------------------------------------------------Solubility at 100°C l 488 l 989


Based on the table, which of the following statements is true?



The solubility of sucrose increases if more is dissolved.



The solubility of sucrose decreases as temperature increases.



The solubility of hydrochloric acid increases if more is dissolved.



The solubility of hydrochloric acid increases as temperature increases.

Answer: By moving heat from the equator toward the poles, ocean currents play an important role in controlling the climate. Ocean currents are also critically important to sea life.

Explanation: Plzz mark me as brainliest !!

Answer:

Away from the normal

Explanation:

Answer:

I think it's false

Explanation:

clouds also help regulate the Earth's energy balance by reflecting and scattering solar radiation and by absorbing the Earth's infrared radiation.

Answer:

false

Explanation:

Answer:

There are [tex]3.779\times 10^{23}[/tex] atoms when the sample of cerium is 20 seconds old.

Explanation:

The decay of isotopes is modelled after the following exponential expression:

[tex]N(t) = N_{o}\cdot e^{-\left(\frac{\ln 2}{t_{1/2}}\right)\cdot t }[/tex] (1)

Where:

[tex]N_{o}[/tex] - Initial number of atoms, dimensionless.

[tex]N(t)[/tex] - Current number of atoms, dimensionless.

[tex]t[/tex] - Time, measured in seconds.

[tex]t_{1/2}[/tex] - Half-time, measured in seconds.

Now we clear the half-time within (1):

[tex]\ln \frac{N(t)}{N_{o}} = -\frac{t\cdot \ln 2}{t_{1/2}}[/tex]

[tex]t_{1/2} = -\frac{t\cdot \ln 2}{\ln \frac{N(t)}{N_{o}} }[/tex]

If we know that [tex]N_{o} = 5\times 10^{23}[/tex], [tex]N(t) = 2\times 10^{23}[/tex] and [tex]t = 66\,s[/tex], then the half-life of the isotope is:

[tex]t_{1/2}=-\frac{(66\,s)\cdot \ln 2}{\ln \frac{2}{5} }[/tex]

[tex]t_{1/2}\approx 49.927\,s[/tex]

And the decay equation for the sample is described by:

[tex]N(t) = (5\times 10^{23})\cdot e^{-0.014\cdot t}[/tex]

Lastly, if we get that [tex]t = 20\,s[/tex], then the activity of the sample of cerium is:

[tex]N(20) = (5\times 10^{23})\cdot e^{(-0.014)\cdot (20)}[/tex]

[tex]N (20) \approx 3.779\times 10^{23}[/tex]

There are [tex]3.779\times 10^{23}[/tex] atoms when the sample of cerium is 20 seconds old.

Answer:

Height of cliff = S = 20 m (Approx)

Explanation:

Given:

Initial velocity = 8 m/s

Distance s = 16 m

Starting acceleration (a) = 0

Computation:

s = ut + 1/2a(t)²

16 = 8t

t = 2 sec

Height of cliff = S

Gravitational acceleration = 10 m/s

S = 1/2a(t)²

S = 1/2(10)(2)²

Height of cliff = S = 20 m (Approx)

Answer:D is correct

Explanation:

The purpose for which home computer scanners use electromagnetic waves is to convert sound waves into electromagnetic waves. Thus, the correct option is B.

Electromagnetic radiation consists of waves of the electromagnetic field spectrum, which propagate through the space and carry out momentum and electromagnetic radiant energy. Electromagnetic radiation includes range of waves such as radio waves, microwaves, infrared rays, light, ultraviolet, X-rays, and gamma rays.

The home computer scanners also uses electromagnetic radiation such as radio waves for the conversion of sound waves into electromagnetic waves into signals which can be detected easily through the machine.

Therefore, the correct option is B.

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Answer: true

because the small truck is going fast and has momentum, so the bus and the truck have the same amount of momentum.

Answer:

1.13 m/s right

Explanation:

Momentum before = momentum after

p₀ = p

p₀ = m₁ v₁ + m₂ v₂

4.9 kg m/s = (5.0 kg) (-0.15 m/s) + (5.0 kg) v

4.9 kg m/s = -0.75 kg m/s + (5.0 kg) v

5.65 kg m/s = (5.0 kg) v

v = 1.13 m/s

Answer: 1.13 m/s equivalent to 1.1 m/s

Explanation:

Answer:

38Watts

Explanation:

Given parameters:

Mass = 75kg

height  = 8.5m

time  = 165s

Unknown:

Power = ?

Solution:

Power is the rate at which work is done.

 Power  = [tex]\frac{work done}{time}[/tex]

 Work done = mgh

m is the mass

g is the acceleration due to gravity = 9.8m/s²

 h is the height

Now insert the parameters and solve;

     P  = [tex]\frac{75 x 9.8 x 8.5}{165}[/tex]   = 38Watts

Answer:

2as=v2-u2

2000=v2

V=44

V=u+at

44/10=t

T=4.4seconds

Explanation:

Answer:

The electric charge on the brush is now positive. This means that if the object it light enough (like a balloon) it would stick to the wall.

This is fun science actually.

Explanation:

May I have brainliest please? :)

1. Heat transfer from a hot burner on the stove into a pot or pan

2. A metal spoon that gets hot from the boiling water

3. Chocolate candy in your hand that melts because of the heat

4. The wires in your house that conduct electricity

5. Roasting marshmallows, the heat will soften the marshmallow

Answer:

the engine heat from a car you just turned on.

a heater

a pad warmer

a hot pot

using a campfire to roast hot dogs

The option that can be considered a limited resources is A: fertile soil.

Therefore, option A is correct.

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Answer:

fertile soil

Explanation:

trust

The book has potential energy (Pe) and the bike has kinetic energy (Ke).

Answer:

C

Explanation:

The book has potential energy and the bike has kinetic energy.

Answer:

The acceleration that the jet liner that must have is 2.241 meters per square second.

Explanation:

Let suppose that the jet liner accelerates uniformly. From statement we know the initial ([tex]v_{o}[/tex]) and final speeds ([tex]v_{f}[/tex]), measured in meters per second, of the aircraft and likewise the runway length ([tex]d[/tex]), measured in meters. The following kinematic equation is used to calculate the minimum acceleration needed ([tex]a[/tex]), measured in meters per square second:

[tex]a = \frac{v_{f}^{2}-v_{o}^{2}}{2\cdot d}[/tex]

If we know that [tex]v_{o} = 0\,\frac{m}{s}[/tex], [tex]v_{f} = 82\,\frac{m}{s}[/tex] and [tex]d = 1500\,m[/tex], then the acceleration that the jet must have is:

[tex]a = \frac{\left(82\,\frac{m}{s} \right)^{2}-\left(0\,\frac{m}{s} \right)^{2}}{2\cdot (1500\,m)}[/tex]

[tex]a = 2.241\,\frac{m}{s^{2}}[/tex]

The acceleration that the jet liner that must have is 2.241 meters per square second.

Answer:

unmmm u can say that it is going mt 15s

Answer: Did you get the answer?

Explanation:

Answer:

Balanced forces: When a number of forces acting on a body do not cause any change in its state of rest or of uniform motion along a straight line then the forces are said to be balanced forces. In other words, a body is said to be underbalanced forced when the resulting force acting on the body is zero.

The balanced forces:

⋅ Cannot set any stationary body into motion.

⋅ May change the shape and size of soft objects.

⋅ Cannot change the speed/velocity of a moving body.

Unbalanced forces:

When the resultant of all the forces acting on a body is not zero, then forces are called unbalanced forces.

Example:

⋅ Game of tug of war: When the forces exerted by both the teams are equal, then the rope does not move. But, if the force applied by team A is greater than team B, then the rope, as well as members of the weaker team, i.e., B, will be pulled towards A. The unbalanced force can (a) Set a stationary body in motion.

⋅ Set a moving body at rest.

⋅ Change the direction of motion.

Explanation:

give me an one thanks please

Answer:

[tex]\displaystyle \vec u_A=\frac{4}{5}\hat i +\frac{3}{5}\hat j[/tex]

Explanation:

Unit Vector

The unit vector associated with a given vector [tex]\vec a[/tex] is another vector pointing in the same direction of [tex]\vec a[/tex] and with magnitude 1.

The unit vector can be calculated as follows:

[tex]\displaystyle \vec u_a=\frac{\vec a }{||\vec a ||}[/tex]

Where [tex]||\vec a ||[/tex] is the magnitude of the vector.

If [tex]\vec a[/tex] is given as:

[tex]\vec a = x\hat i +y\hat j[/tex]

The magnitude of the vector is:

[tex]{||\vec a ||}=\sqrt{x^2+y^2}[/tex]

We have:

[tex]\vec A=4\hat i +3\hat j[/tex]

[tex]{||\vec a ||}=\sqrt{4^2+3^2}=\sqrt{25}=5[/tex]

Thus the unit vector is:

[tex]\displaystyle \vec u_A=\frac{4\hat i +3\hat j }{5}[/tex]

Simplifying:

[tex]\mathbf{\displaystyle \vec u_A=\frac{4}{5}\hat i +\frac{3}{5}\hat j}[/tex]

Answer:

delivery truck

Explanation:

All the objects such as delivery truck stopped at a light has no kinetic energy. Thus, the correct option is A.

Kinetic energy is the energy of motion, it is observable as the movement of an object or the subatomic particles of an object. Every moving object and particle have certain amount of kinetic energy. A person who is walking, a soaring baseball, a crumb falling from a table and a charged particle in an electric field are all examples of the kinetic energy at work.

The example in which the delivery truck stopped at a light is an example which has no kinetic energy. Kinetic energy is due to motion of the object.

Therefore, the correct option is A.

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Your question is incomplete, most probably the complete question is:

Which of the following objects has no kinetic energy?

a. delivery truck stopped at a light

b. eagle in flight over a park

c. cannonball fired from a cannon

d. diver falling from a diver board

Answer:

Explanation:

3.011 x 10^24 atoms

Answer:

jskskskssksksksskssksksksksks

Answer:

the normal human body temperature in Celcius is 37°C, in Fahrenheit is 98.6°F, in Kelvin is 310°K

Answer:

A. The applied force should be the same size as the friction force

Explanation:

Whenever we apply a force to an object it moves if the force applied to that object is unbalanced and there is no force or a lesser force to counter it. According to Newton's Second Law of motion, when an unbalanced force is applied to an object it produces an acceleration in the object in its own direction. So, the two forces acting on this box are the frictional force and the applied force in horizontal direction. In order to move the box at constant speed, the applied force must first, overcome the frictional force, so the object can start its motion. Since, the motion has constant velocity, it means no acceleration. So, the force must be balanced in order to avoid acceleration as a consequence of Newton's Second Law of motion. Therefore, the correction in this case will be:

A. The applied force should be the same size as the friction force

2*3.5 = 7m/s

You multiply the acceleration per the time (they both are in seconds, otherwise, you should set them in the same units).

Answer:

Where are the statements?

Explanation:

Answer: false

Explanation:

Nitrogen is actually the most abundant gas in the atmosphere.

The answer to the question is false. Hope this helps you!

Answer:

false.

Explanation:

The most abundant gas in the Earth's atmosphere is nitrogen.

Answer:

M_Train>> m_car    a_train <a_car

Explanation:

To start the movement of the train or the car, the motorcycle applies a force on the wheels, which starts the acceleration in the case of the train, it has a much greater mass than that of the car, for which to obtain the same acceleration necessary a much greater force

         a = F / m

as the mass of the train is greater than that of the car.

         a_train <a_car

Something similar happens when the vehicles stop, the engine stops applying force forward and the brakes apply a force backward that creates a negative acceleration that slows down, again as the mass of the train is much greater than the of the car its negative acceleration is much less.

It is good to clarify that to compensate for this the trains have a braking system on all wheels

Answer:

P.E =mgh

k.E =1/2mv^2

Explanation:

PE increases with increasing height whereas KE increases with increasing speed

Answer:

A. The number of valence electrons increases by 1.

Explanation:

As you move across any period on the periodic table, the number of valence electrons increases by a value of 1.

Answer:

READ YOUR QUESTION CAREFULLY:

If it says left to right, the answer is A. The number of valence electrons increases by 1.

If it says right to left, the answer is B. The number of valence electrons decreases by 1.

Good luck :)