Answer: Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.
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by how much would 1500j of heat energy raise the temperature of 0.50kg of aluminum
pls what is the specific heat capacity of water
two different r resistors in parallel always have the same ____________; two resistors in series always have the same ______________.
Answer:two different r resistors in parallel always have the same U; two resistors in series always have the same I.
Explanation:
If two different r resistors in parallel always have the same voltage or potential difference across them and if two resistors in series always have the same electric current passing through them .
What is resistance?Resistance is the obstruction of electrons in an electrically conducting material .
The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law .
V = I × R
The voltage is the same if the resistance is connected in a parallel arrangement .
The current is the same if the resistance is connected in a series arrangement .
Thus , If the voltage or potential difference across two separate resistors connected in parallel is always the same, as well as the electric current flowing through two resistors connected in series .
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A boat does 500 joules of work as travels 50 meters in 5 second how much power was produced?
A-2500 watts
B-5000 watts
C-250 watts
D-500 watts
Answer:
Explanation:
A 2,500 watts
As you clear the sidewalk with a leaf blower, the blower pushes you away from the leaves. What is pushing on the blower so that it can push on you
So we want to find what causes the blower to push on you when you use it.
We will see that this happens because of Newton's third law, and the thing that is pushing the blower is the air itself.
Well, Newton's third law says that when two objects interact, they exert equal and opposite forces on each other.
In this case, the leaf blower is interacting with the air, pushing it so it can push away the leaves. But by this law, the air also exerts a force on the leaf blower (we have the interaction leaf blower- air) so the air is what "pushes" the blower, and because you are holding it, you feel that push.
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Need help! Thanks for whoever answers.
Hi there!
Finding the time taken to land deals with the VERTICAL motion of the object, so we can disregard the horizontal velocity.
Use the simplified kinematic equation:
t = √2h/g
Plug in given values. Let g = 9.8 m/s²
t = √2(75)/9.8 = 3.91 sec
Diego and Mika are trying to remove a tire from
Diego's car. When they pull together in the same
direction, Mika with a force of 23 N and Diego
with a force of 31 N, they just barely get the tire
to move off the wheel. What is the magnitude of
the force between the tire and the wheel?
The force is an additive quantity allows to find the result for the total force exerted by the two people is:
[tex]F_{total}[/tex] = 54 N
Newton's second law gives a relationship between the net force, the mass and the acceleration of the body, when the acceleration is zero, this expression is called the equilibrium condition.
∑ F = 0
Where F is the force that is a vector quantity and therefore additive.
They indicate that the two people pull with a force of 23 N and 31 N in the same direction.
[tex]F_{total} = F_1 +F_2[/tex]
Let's calculate.
[tex]F_{total}[/tex] = 23 +31
[tex]F_{total}[/tex] = 54 N
In conclusion, using that force is an additive quantity, we can find the total force exerted by the two people is:
[tex]F_{total}[/tex] = 54 N
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14 Select the correct answer. Which particles make up the nucleus of an atom? OA protons and electrons OB. neutrons and electrons O C. protons only OD. protons and neutrons СЕ. neutrons only
Answer:
The right answer is. protons and neutrons
"The slumped area in this model supports grassy vegetation. What does this say about the speed of the mass movement, and why are there no trees growing in the slumped area?"
Slumped area only supports grassy vegetation and no trees can be grow on it.
A slump is a form of mass wasting that occurs when a rock layer moves at a short distance down a slope, this type of area is called slumped area. The speed of the mass movement at slumped area is slow i.e. few cm per year or meter per year.
There are no trees growing in the slumped area because trees required fixed land but the land moves at the slumped area so we can conclude that slumped area only supports grassy vegetation and no trees can be grow on it.
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Answer:
The grassy vegetation in the slumped soil indicates slow movement of material, and it appears recently enough that trees have not had time to establish themselves.
Explanation:
It likely moved gradually over a period ranging from days to years. Grassy vegetaion has been able to establish on the surface without any breaks or open soil visible, this is evidence of the gradual movement.
Why does the rotation curve of a spiral galaxy increase with increasing distance near the galaxy's center
Answer: Because the encircled mass increases so fast that gravity increases with the radius.
Explanation:
which refers to the distance between two crests or two troughs on a transverse wave?
Answer: wavelength
hope this helps XD
A student is attempting to design a simple generator that is capable of generating the greatest amount of electric current. He created four prototypes each with a different number of turns of wire. Two of the prototypes used strong magnets and the other two used weak magnets. He tested each prototype by rotating the magnets inside the turns of wire and measured the current generated by each prototype. What conclusion can the student draw from the data he collected?
Answer:
uhm
Explanation:
Answer:its b
Explanation:
How is energy transferred between molecules?
(explain it like a middle schooler because my teacher is gonna expect something)
Answer:
Through vibrations between the molecules(amplify?)
Explanation:
PLEASE ANSWER NEED HELP!!!!!!!! PLEASE THE CORRECT ANSWER!!!!!!
Armando has been playing tennis for a few months. He appreciates the workout and, thanks to lessons, is getting much better. His series of lessons is coming to an end, so it is a good time for him to reflect on his experience. What kinds of questions should he ask himself?
A.
Is tennis actually a good use of his time or not?
B.
Could he ever become a professional tennis player?
C.
Is he as good as other people who play at the same court?
D.
Does he really enjoy it and does he have any future goals?
PLEASE NO LINKS
Answer:
D
Explanation:
D. Does he really enjoy it and does he have any future goals?
A light bulb is plugged into a wall outlet (220 V) and it uses 0.68 amps. What is the light bulb’s resistance?
Answer:
14.96 amps
Explanation:
The frequency of the middle d note on a piano is 293. 66 hz. What is the wavelength of this note in centimeters? the speed of sound in air is 343. 06 m/s.
Answer:
98
Explanation:
From=
Zorn and Porsha are ice skating. Porsha has a mass of 60 kg, and Zorn has a mass of 40 kg. As they face each
other, Porsha pushes off Zorn with a force of 168 N. Assume the friction between the skaters and the ice is
negligible.
Assuming the friction between the skaters and the ice is negligible, the magnitude of Porsha's acceleration is 2.8m/s².
Missing part of the question: determine the magnitude of Porsha's acceleration.
Given the data in the question;
Mass of Porsha; [tex]m_{porsha} = 60kg[/tex]Mass of Zorn; [tex]m_{zorn} = 40kg[/tex]Force of Porsha push; [tex]F_{porsha} = 168N[/tex]Magnitude of Porsha's acceleration; [tex]a = \ ?[/tex]
To determine the magnitude of Porsha's acceleration, we use Newton's second laws of motion:
[tex]F = m*a[/tex]
Where m is the mass of the object and a is the acceleration.
We substitute the mass of Porsha and the force he used into the equation
[tex]168N = 60kg * a\\\\a = \frac{168kg.m/s^2}{60kg}\\\\a = 2.8m/s^2[/tex]
Therefore, assuming the friction between the skaters and the ice is negligible, the magnitude of Porsha's acceleration is 2.8m/s².
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If a 6.0 kg bowling ball is rolled with a velocity of 3.5 m/s, what is the momentum of the ball? Show Work
Answer: 21 kgm/s
Explanation:
momentum
p=mv (mass*velocity )
m= 6kg
v=3.5 m/s
6*3.5= 21 kgm/s
A box has a force of 9000 N pulling to the right and 7000 N pulling to the left, Determine the resultant forces on the box
Answer:The horizontal forces can be summed as vectors in order to determine the net force. Fnet = ∑Fx = 5.20 N, right - 3.29 N, left = 1.91 N, right.
Explanation:
What type of energy is primarily associated with the random motion of the particles in a substance?
A. electrical energy
B. light energy
C. mechanical energy
D. thermal energy
Answer:
D. Thermal Energy
Explanation:
For a rotating object experiencing no net external torque, what happens to the rate of rotation if the moment of inertia of the object decreases by a factor of 2
Answer:
The rate of rotation increases by a factor of 2.
Explanation:
The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.
What will be the rate of rotation?The torque for the rotating body will be given by the formula
[tex]T= I\alpha[/tex]
Here,
T= Torque
I= Moment of inertia
[tex]\alpha=[/tex] Angular acceleration / Rate of rotation
Now from the question, it is given that a rotating object experiencing no net external torque, what happens to the rate of rotation if the moment of inertia of the object decreases by 2 times.
Here moment of inertia will be [tex]I'=\dfrac{I}{2}[/tex]
So the formula will become
[tex]T= \dfrac{I}{2} \times \alpha[/tex]
Now for making the Torque to be constant the acceleration should be two times [tex]\alpha'=2\alpha[/tex]
So for constant torque
[tex]T= \dfrac{I}{2} \times 2\alpha[/tex]
Thus The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.
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How many cells that are 0.5 V, 0.2 A each are required to create a 12 V battery that has a 0.5 A capability
24 cells 0.5V are required to create a 12volts battery
2.5 cells 0.2A is required to create a 12volts battery
Let the number of 0.5volts cells required to create a battery of 12Volts be x
Let the number of 0.2A cells required to create a current of 0.5A be y
To get the value of "x", we will use the expression:
[tex]0.5x = 12\\x=\frac{12}{0.5}\\x = 24[/tex]
This shows 24 cells 0.5V are required to create a 12volts battery
To get the value of "y", we will use the expression:
[tex]0.2y = 0.5\\y=\frac{0.5}{0.2}\\y = 2.5[/tex]
This shows 2.5 cells 0.2A is required to create a 12volts battery
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How to calculate the angle of a resultant
Answer:
The direction angle θ of the resultant in the Polar (positive) specification is then θ = α + 60°. The Law of Cosines is used to calculate the magnitude (r) and the Law of Sines is used to calculate the angle (α).
which part of the electromagnetic specturm has the lowest radiant energy?
An object of mass m and another object of mass 2m are each forced to move along a circle of radius 1.0 m at a constant speed of 1.0 m/s. The magnitudes of their accelerations are:
The magnitude of centripetal acceleration of the both bodies is 1 m/s^2.
The centripetal acceleration is given by the relation;
a = v^2/r
v = velocity
r = radius of the circular
We have the following information;
v = 1.0 m/s
r = 1.0 m
In each case, the magnitude of centripetal acceleration is;
a = 1^2/1 = 1 m/s^2
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determine the longest wavelength of light required to remove an electron from a sample of potassium metal, if the binding energy for an electron in k is 1.76 × 103 kj/mol.
Answer:
The wavelength of light is 68 nm
Explanation:
Investigate the ways architects and engineers increase the efficiency of climate control systems.
Answer:
sense we see what gases can do to earth we have made progress to keep it habitable buy solar panels water energy and using as lil of waste material as possible
Explanation:
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How does increasing the frequency of a wave affect the wavelength of the wave?
How does increasing the wavelength of a wave affect the frequency of a wave?
Answer:
How does increasing the frequency of a wave affect the wavelength of the wave?
The frequency is defined as the number of full wavelengths that may be completed in a given unit of time (f). The frequency (F) and energy (E) of a wavelength drop as the wavelength's size rises. As a result of these calculations, you may have noticed that the wavelength grows shorter as the frequency rises. The wavelength increases in length in proportion to the reduction in frequency.
Explanation:
How does increasing the wavelength of a wave affect the frequency of a wave?
The frequency (F) and energy (E) of a wavelength drop as the wavelength's size rises. As a result of these calculations, you may have noticed that the wavelength grows shorter as the frequency rises. The wavelength increases in length in proportion to the reduction in frequency.
Answer:
This isnt exactly an answer, but it should help if you need a general grip on the subject. Its simply an example or model.
Explanation:
It is sort of like being on the road. If you want to get to your destination, you have to follow the correct path or paths, meaning you dont want to steer out of lane because if you do it will be even harder to get where you were going. So as long as you can get a general direction of the frequency you can narrow it down you can find where you are going.
A 50 kg ball is sitting on a table and is pushed to the right with a force of 200 N what is the weight of this ball
Answer:
4 m/s^2
Explanation:
F = ma
a = F/m
a = 200/50
a = 4 m/s^2
Electric current moves from low voltage to
high voltage.
True
False
Kinetic energy is best described as
A. the energy of motion.
В. stored energy
C. the energy of particles.
D. wave-like energy
Answer:
Kinetic energy is best described as the energy of motion.
Explanation:
Just a cheerful teen willing to help,
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stay salty...
Kinetic energy is best described by the energy of motion. The correct option is option (A).
The kinetic energy is described as,
Kinetic energy = 1/2*mass*velocity²
The kinetic energy is the energy that acts when an object is in motion. It is characterized as the work necessary to move an object from a state of rest to its present velocity. From the equation, the square of the velocity and mass is directly proportional to the kinetic energy. The kinetic energy is a scalar quantity and its SI unit is joules.
Hence, the correct option is (A).
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