Answer:
you can't go ice skating on it because if it just reached the temp then you need to wait for about 2 hours
Explanation:
What is the voltage drop across the 30 q resistor?
A. 120 v
B. 30 V
c. 2 v
D. 60 V
Answer:
120v 120v 120v 120v 120v
1. Explain and find the volume of the round pan rounded to the nearest tenth.
2. Explain and find the volume of the rectangular pan rounded to the nearest tenth.
3. Explain how the volume of the two cake pans compare.
4. The cake density is 0.454 ounce per cubic inch and the fair price is $0.20 per ounce. What should be a fair price for each cake?
Explanation:
1. Given,
Diameter of the round pan = 8in
Radius of the round pan = 8/2 = 4in
Height of the round pan = 2in
Therefore,
Volume of the round pan
[tex]\pi {r}^{2} h[/tex]
[tex] = 3.14 \times 4in \times 4in \times 2in[/tex]
[tex] = 100.48 {in}^{3} [/tex]
When rounded to nearest tenth,
[tex] = 100.5 {in}^{3} (ans)[/tex]
2. Given,
Dimensions of the rectangular pan = 12in, 8in, 2in
Therefore,
Volume of the rectangular pan = breadth × height × length
= 12in × 8in × 2in
[tex] = 192 {in}^{3} [/tex]
When rounded to nearest tenth,
[tex] = 192.00 {in}^{3} [/tex]
[tex] = 192.0 \: or \: 192 {in}^{3} [/tex]
3. Volume of round pan
[tex] = {100.5in}^{3} [/tex]
Volume of Rectangular pan
[tex] = 192 {in}^{3} [/tex]
Hence,
Their difference of volume will be ,
[tex] = (192 - 100.5) {in}^{3} [/tex]
[tex] = 91.5 {in}^{3} (ans)[/tex]
4. In this case we must know either the mass of the cake or its volume.
Given the case that we know the mass of the cake, it would be:
price = x * 0.2
where x is the mass of the cake in ounces, that is to say if for example a cake has a mass of 10 ounces, it would be:
price = 10 * 0.2 = 2
which means that each cake costs $ 2
Given the case of the volume, we must first multiply the density by this volume in order to calculate the mass and finally the price.
price = x * 0.454 * 0.2
where x is the volume of the cake in cubic inches, if for example the volume is 10 cubic inches it would be:
price = 10 * 0.454 * 0.2 = 0.908
which means that each cake costs $ 0.9
0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t 0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck ( magnitude and direction) after a force of 25.0 N directed to the right has been applied for 0.050 s. (b) If, instead, a force of 12.0 N directed to the left is applied from 0 tot 0.050s, what is the final velocity of the puck
Answer: [tex](a)10.812\ m/s\ (b)\ 0.75\ m/s\ \text{left}[/tex]
Explanation:
Given
Mass of hockey puck [tex]m=0.160\ kg[/tex]
Initial velocity of hockey puck is [tex]u=3\ m/s[/tex]
First a horizontal force of [tex]25\ N[/tex] is applied to the right for [tex]0.05\ s[/tex]
acceleration associated with it is
[tex]\Rightarrow a=\dfrac{25}{0.160}\\\\\Rightarrow a=156.5\ m/s^2[/tex]
Using equation of motion i.e.
[tex]\Rightarrow v=u+at\\\Rightarrow v=3+156.25\times 0.05\\\Rightarrow v=3+7.812\\\Rightarrow v=10.812\ m/s[/tex]
(b) When a force of [tex]12\ N[/tex] is applied for 0.05s
Using equation of motion i.e.
[tex]\Rightarrow v=3-\dfrac{12}{0.160}\times 0.05\\\\\Rightarrow v=3-75\times 0.05\\\Rightarrow v=3-3.75\\\Rightarrow v=-0.75\ m/s\\\Rightarrow v=0.75\ \text{towards left}[/tex]
What is the resistance of resistor R3?
Answer: 2.0
Explanation: I KNOW !
Which of the following characteristics were not included in John Dalton's description of the atom? A. In any element, all the atoms are the same. B. Atoms are smaller than quarks. C. All matter is made up of atoms. D. Atoms exist only on Earth. E. Elements in a compound are always in a constant ratio. NO LINKS OR VIRUSES PLS
Answer:
d
Explanation:
atoms exits everywhere
Answer: The correct choices to this question are, "B. Atoms are smaller than quarks," and "D. Atoms only exist on earth." Hope this helped.
6.) What is the missing element?
a. Hydrogen
b. Helium
c. Carbon
d. Nitrogen
Answer:
It's nitrogen. Specifically, this is the alpha emission of an N-15 isotope.
What is a specific heat capacity of air in calorie per gram Celsius?
Answer:
I dont know hehe
Explanation:
Sakit na ulo ko.
I will give the brainiest for the one who answers it first and CORRECTLY! (pls don't just randomly put any answer just to get points!) Select the correct answers. Which TWO statements are true about generators?
. They covert motion energy to electric energy
. They have a pair of magnets and a rotating metal coil
. They're powered by fossil fuels
.They convert electric energy to motion energy
.They use the relative motion of magnet and coil of wire
Answer:The true statements about generators would be :
They convert motion energy to electric energy
They use the relative motion of a magnet and a coil of wire.
Explanation:
Generators use the energy of the rotating coil in relative motion with magnets to induce a current within the wire. Generators are devices that convert energy into a voltage by the relative motion of the magnet and a coil that changes flux.
For the mirror configuration below, the angle of incidence for the going towards the mirror on the right is 15 degrees. What is the angle of reflection for the light ray leaving the mirror on the bottom
Answer:
Thus, the angle of reflection is 15 degrees.
Explanation:
Angle of incidence, i = 15 degrees
The angle of incidence is the angle between the normal to the mirror and the incident ray, the angle of reflection is the angle between the reflected ray and the normal to the mirror.
According to the laws of reflection, the angle of incidence is equal to the angle of reflection.
Thus, the angle of reflection = angle of incidence = 15 degrees
If the index of refraction for a certain glass is 1.5, and the angle of refraction is 15 degrees for a ray of light
traveling from air (index of 1) what is the angle of incidence? (in coming beam)
Round your answer to the nearest tenth of a digit. The answer is in degrees so don't worry about the units
Answer:
[tex]\theta_i = 23^o[/tex]
Explanation:
The refractive index of a medium is given by the following formula:
[tex]\eta = \frac{Sin\theta_i}{Sin\theta_r}[/tex]
where,
η = refractive index = 1.5
[tex]\theta_i[/tex] = angle of incidence = ?
[tex]\theta_r[/tex] = angle of refraction = 15°
Therefore,
[tex]1.5 = \frac{Sin\theta_i}{Sin15^o}\\\\Sin\theta_i=(1.5)Sin15^o\\\\\theta_i = Sin^{-1}(0.388)\\\\[/tex]
[tex]\theta_i = 23^o[/tex]
Un cuerpo con un peso de magnitud igual a 200 N cuelga sobre dos cuerdas que forman un ángulo de 140° entre ellas. Determina la magnitud de la fuerza que ejerce cada cuerda sobre el cuerpo.
Answer:
T = 292.4 N
Explanation:
For this exercise we must use the translational equilibrium condition
∑ F = 0
Since force is a vector magnitude, the easiest way
Since the angle between the two forces is 140, the angle from the vertical is half tea = 70
cos θ = T_y / T
sin θ = Tₓ / T
T_y = T cos 70
Tₓ = T sin 70
X axis
Tₓ₁-Tₓ₂ = 0
Tₓ₁ = Tₓ₂
Y axis
T_y + T_y - W = 0
2 T cos 70 = W
T = [tex]\frac{W}{2 \ cos 70}[/tex]
let's calculate
T = 200/2 cos 70
T = 292.4 N
A moon orbits a planet in a nearly circular orbit of radius R, as shown in the figure. Which of the following free-body diagrams could be used to analyze the forces exerted on the moon when it is at the position indicated in the figure?
I don't see any free body diagrams.
Free body diagram of a moon orbits a planet in a nearly circular orbit of radius R, as shown in the figure is attached in the answer. This could be used to analyze the forces exerted on the moon when it is at the position indicated in the figure.
What is free body diagram?Free-body diagrams are used to display the relative strength and direction of all forces that are being applied to an item in a certain scenario. A unique illustration of the vector diagrams that were covered in a previous lesson is the free-body diagram. We will make use of these graphics throughout our study of physics. In a free-body diagram, the size of the arrow indicates the strength of the force.
The force is acting in the direction indicated by the arrow's direction. The exact type of force is labelled next to each force arrow in the diagram. In a free-body diagram, it is common practice to depict the item as a box and to draw the force arrow from the box's center outward in the direction that the force is acting.
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You push a box 3.5 m across the floor with a constant force of 12.4 N. How much work do you do on the box?
Answer:
43.4 N (newton)
Name the component used in electric circuits that is sensitive to temperature
Answer :
Tungsten filament
To induce an electric current in a coil of a wire you can
A) move a magnet into the center of the coil of wire
B) hold a magnet against the coil of wire
C) hold a magnet in the middle of the coil
D) hold a magnet above the coil of wire
Answer:
The Answer is
A) move a magnet into the centre of the coil of wire
Depending on how there used, pulleys can have different uses. One use for pulleys is that they can...
A. Increase the total work needed
B. Decrease the total work needed
C. Change the direction of a force
D. Roll things down a ramp
Rex decides to launch a priceless vase into the air at a 90-degree angle. The initial velocity vase is +7.0 m/s. Dylan claims that the vase would achieve a higher height if it were launched at a 45-degree a Dylan correct? A. Dylan is correct because a 45-degree launch angle results in the largest vertical range B. Dylan is correct because larger launch angles result in a smaller vertical range. C. Dylan is incorrect because a 90-degree and 45-degree launch angle result in the same range. D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Answer:
D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Explanation:
Projectile is the motion of an object thrown into space. When an object is thrown into space, the only force which acts on it is the acceleration due to gravity.
An object thrown into space would reach maximum height (vertical range) if it is launched at an angle of 90 degrees. For maximum horizontal range, the object needs to be launched at an angle of 45 degrees.
Therefore Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
The correct statement is
D. Dylan is incorrect because a 90-degree launch angle results in the largest vertical range
Information regarding projectile:It is the object motion that should be thrown into space. At the time when the object is thrown into space, the only force that should act on it represent the acceleration because of gravity.
Since object thrown into space should have to reach maximum height in the case when it is launched the 90 degrees angle. Due to the above reasons, option D is considered.
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A __________ is a push or pull.
Answer:
force
Explanation:
Force is a push or a pull of an object that causes the object to speed up, slow down, or stay in one place. In other words, a force is what causes an object to move. Friction and gravity are two types of forces that influence how an object moves.
You weigh a bear by making him stand on four scales as shown. Draw a free-body diagram showing all the forces acting on the bear. If his weight is 1,500 newtons, what is the reading on
the fourth scale?
Answer:
what a fat bear I love physics
write any two different between work and power?
Answer:
1. Work Is a type of Physical Activity
2. Power is Basically Having control of Society
Explanation:
if brakes were applied to a already moving car with a speed of 72 kilometre per hour to reduce it to the speed of 18 kilometre per hour in 10 seconds calculate
Answer:
Acceleration, a = -0.5 m/s²
Explanation:
Given the following data;
Initial velocity = 72 km/h
Final velocity = 18 km/h
Time = 10 seconds
To find the acceleration of the car;
Conversion:
72 km/h to m/s = 72*1000/3600 = 20m/s
18 km/h to m/s = 18*1000/3600 = 5 m/s
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.
Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.
Mathematically, acceleration is given by the equation;
[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]
Substituting into the equation;
[tex]a = \frac{5 - 20}{10}[/tex]
[tex]a = \frac{-5}{10}[/tex]
Acceleration, a = -0.5 m/s²
Therefore, the car is decelerating.
if displacement covered by a particle is zero then distance cover by it
Answer:
When displacement is zero, the particle may be at rest, therefore, distance travelled = 0.
Again, when displacement is zero, the final position matches with the initial position after some time, but the distance travelled will not be zero.
John and Henry push a piano with 800N, and the piano refuses to move. According to the definition of work in physics, there is NO work done on the piano.
Answer:
Explanation:
This is true because the definition of work is the parallel force required to move an object times the distance it moves. If it doesn't move, no work has been done. That is not to say that no energy has been expended, because it most certainly has! But that is not the same thing.
Which of the following statements is CORRECT?
Question options:
A. Sounds that differ in frequency differ in amplitude.
B. Sounds that differ in loudness are said to differ in quality.
C. The speed of sound in air at 20ºC is 330 m/s .
D. Sound does not require a medium in order to travel through
E. Sound waves are an example of longitudinal waves.
Answer:
E.) Sound Waves are an example of longitudinal waves.
Explanation:
I was sure either A or E was correct so I had to look it up. In reference to three sources, it is proven that sound waves are longitudinal. Therefore, without a doubt, I would try to go with E. I know D is wrong as well as B most definitely. That is because sound always requires a medium to travel through in order to be heard; additionally sounds don't necessarily have to be a certain rate of loudness in order to be considered of different quality. Therefore leaving you with A, C, or E. Additionally C is a false fact as well. So I highly suggest choosing E because there is sufficient sources to prove that. I'll provide a direct link down below.
https://www.bing.com/search?q=are+sound+waves+longitudinal+waves&cvid=fc17d9f3f744496da334cf10a7daad57&aqs=edge..69i57l2j69i60j5j69i61j69i60l2.5395j0j1&pglt=2339&FORM=ANNTA1&PC=NMTS
The correct statement is sound waves are an example of longitudinal waves.
Which is an example of the longitudinal wave?In a longitudinal wave, the particles are displaced parallel to the direction the wave travels. An example of longitudinal waves is compressions moving along a slinky. We can make a horizontal longitudinal wave by pushing and pulling the slinky horizontally.
Is sound a longitudinal wave?Sound is a longitudinal wave that alternately compresses and decompresses the component particles of the medium through which it travels.
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Which element is LEAST likely to react with Magnesium?
a. Calcium
b. Sulfur
c. Chlorine
d. Iodine
Answer:
my only true question is b
Which process is represented inside of the dashed circle?
Evaporation
Condensation
Precipitation
Transpiration
The force of gravity can be represented by the equation
. This equation is a statement of fact and holds true in every situation. Many experiments have been done involving this equation, and no experiment has ever yielded data that have not supported it.
The force of gravity can be best described as a(n)
experiment.
hypothesis.
theory.
law.
Answer:
law
Explanation:
A law is a scientific statement that describes a proven fact about how things function in nature
What is the major function of Eustachain tube of ear?
Answer:
Explanation:
Eustachian tube is located in between the middle ear and the nasopharynx.It's function is to control the pressure within the middle making it equal to the air pressure outside the body.
How much current is present if you have a line with 0.0001 C of charge running every 0.17 s?
Answer:
Q=it
where Q=Charge
i= Current
t=time
i=Q/t
= 0.0001/0.17
=5.88x10-⁴Amperes
a
what is the weight of air inside a spherical balloon
of radius 2 meters? The density of air is 1.29 kg /m^3
Spherical balloon
m = 43.2 kg
Explanation:
volume of sphere = (4/3)pi(r)^3
= (4/3)(3.14)(2 m)^3
= 33.5 m^3
density = mass/volume
or solving for mass m,
m = (density)×(volume)
= (1.29 kg/m^3)(33.5 m^3)
= 43.2 kg
The weight of air inside this spherical balloon is equal to 423.75 Newton.
Given the following data:
Density of air = 1.29 [tex]kg /m^3[/tex]Radius of balloon = 2 metersTo determine the weight of air inside this spherical balloon:
First of all, we would calculate the volume of this spherical balloon by using this formula:
[tex]Volume = \frac{4}{3} \pi r^3\\\\Volume = \frac{4}{3} \times 3.142 \times 2^3\\\\Volume = \frac{32 \times 3.142}{3}[/tex]
Volume = 33.52 cubic meters.
Next, we would calculate the mass of air contained in this spherical balloon:
[tex]Mass = density \times volume\\\\Mass = 1.29 \times 33.52[/tex]
Mass = 43.24 kg
For the weight of air:
[tex]Weight = mg\\\\Weight = 43.24 \times 9.8[/tex]
Weight = 423.75 Newton
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