Answer:
A prism is a piece of glass or plastic in the shape of a triangle.
Explanation:
The colors of the rainbow in order are: red, orange, yellow, green, blue, indigo, and violet.
g Drop the object again and carefully observe its motion after it hits the ground (it should bounce). (Consider only the first bounce and do NOT assume the total energy is the same as the total energy of the object before it hits the ground.) a. List the quantities that you need to know to determine the total energy of the object after it hits the ground. b. Record your measurements and describe how you measured them. c. Calculate the total energy of the object after it hit the ground. Your final answer: ______________ d. Determine whether or not the object’s energy was conserved when it hit the ground. If it was not conserved, explain where the energy went.
Answer:
a) quantity to be measured is the height to which the body rises
b) weighing the body , rule or fixed tape measure
c) Em₁ = m g h
d) deformation of the body or it is transformed into heat during the crash
Explanation:
In this exercise of falling and rebounding a body, we must know the speed of the body when it reaches the ground, which can be calculated using the conservation of energy, since the height where it was released is known.
a) What quantities must you know to calculate the energy after the bounce?
The quantity to be measured is the height to which the body rises, we assume negligible air resistance.
So let's use the conservation of energy
starting point. Soil
Em₀ = K = ½ m v²
final point. Higher
Em_f = U = mg h
Em₀ = Em_f
Em₀ = m g h₀
b) to have the measurements, we begin by weighing the body and calculating its mass, the height was measured with a rule or fixed tape measure and seeing how far the body rises.
c) We use conservation of energy
starting point. Soil
Em₁ = K = ½ m v²
final point. Higher
Em_f = U = mg h
Em₁ = Em_f
Em₁ = m g h
d) to determine if the energy is conserved, the arrival energy and the output energy must be compared.
There are two possibilities.
* that have been equal therefore energy is conserved
* that have been different (most likely) therefore the energy of the rebound is less than the initial energy, it cannot be stored in the possible deformation of the body or it is transformed into heat during the crash
A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 11.5 pC. The inner cylinder has a radius of 0.550 mm, the outer one has a radius of 7.20 mm, and the length of each cylinder is 13.0 cm.
(a) What is the capacitance?
(b) What applied potential difference is necessary to produce these charges on the cylinders?
Answer:
A)2.811 × 10^-12 F
B)4.09V
Explanation:
(a) What is the capacitance?
Capacitance of coaxial cylinder can be determined using below expresion
C= (2π ε0 L)/ Ln[ rb/ra]
Where
ε0= permittivity of free space= 8.85×10^−12 Fm^-1
L= length of each cylinder =13.0 cm= 13×10^-2m
rb= radius of outer cylinder= 7.20 mm= 7.20×10^-3m
ra=radius of inner cylinder=0.550 mm= 0.550×10^-3 m
If we substitute the values we have,
C= (2π ε0 L)/ Ln[ rb/ra]
C= ( 2 × π × 8.85×10^−12 ×13×10^-2) / Ln[
7.20×10^-3/0.550×10^-3]
C=( 7.2288×10^-12 )/2.5729
C=2.811 × 10^-12 F
B) (b) What applied potential difference is necessary to produce these charges on the cylinders?
Vba= Q/C
Where Vba=potential difference
Q= charge on each = 11.5 pC. = 11.5×10^-12
C= capacitance= 2.811 × 10^-12 F
If we substitute the values we have
Vba=(11.5×10^-12)/2.811 × 10^-12
= 4.09V
please help me please just looking the picture
the work done done by that person is less than zero
Expository essay "Climate change in Fiji"
Answer: Climate change poses to the tourism development in Fiji islands. It shows the adverse effects of the changing climate and the dangers pose by the tourism activities and also pose a major hazard for the local people in the region. It also deals with the dangerous carbon emissions and CO2 effect on the landscape, food, water, energy.
The pacific is the world`s largest ocean with a surface area of 175 million sq km and constitutes for 40% of the planet`s waters. Located in the tropical latitudes, it covers more than half the globe`s circumference. Temperature of the surface water in the western tropical regions is always more than 28 ÌŠC over a depth of several hundred meters. This makes up the world`s storage of thermal energy for exchange with atmosphere. Here the interaction between atmosphere and ocean is most extreme and influences the climate not only regionally but planet-wide. The nations of the pacific are obscured human settlements absorbed in this vast fluid universe. The ocean is the most important factor controlling the environment and life.
Which is NOT a way to stay safe from static electricity?
a lightning rod on a building
a metal spike in an airport runway
an anti-static chain on a large truck
a run through an open field during a lightning
plssssssssssss answer not in a meen way but corrrect answer only plsssssssssssss answer correct i will drop a thx and rate yo stars ans give you brainlyest
a metal spike in an airport runway
A metal spike in an airport runway is NOT a way to stay safe from static electricity. Hence option C is correct.
What is electricity ?Electricity is a collection of physical phenomena related with the presence and motion of matter having an electric charge. Both electricity and magnetism are connected to the phenomena of electromagnetic, as defined by Maxwell's equations. Lightning, static electricity, electric heating, electric discharges, and other frequent occurrences are all connected to electricity.
An electric field is created when either a positive or negative electric charge is present. The movement of electric charges results in an electric current and a magnetic field. In most applications, a force of magnitude determined by Coulomb's law operates on a charge. Volts are commonly used to measure electric potential.
Hence option C is correct.
To know more about electricity :
https://brainly.com/question/12791045
#SPJ3.
In which situation is static electricity most likely to form?
Elizabeth switches on a light.
Jack holds a plastic comb close to a stream of water.
Marie drives a car.
Cooper bakes a cake. plssssssssssss answer not in a meen way but corrrect answer only plsssssssssssss answer correct i will drop a thx and rate yo stars ans give you brainlyest
Answer:
I'd go for 'Marie drives a car'
Explanation:
Static electricity will possible form in all the scenarios, but is more likely to form when you're driving a car. This is due to the friction between the body of the car and the particles in the air around the body of the car. This is why chains are sometimes attached to fuel tankers when transporting them. The chain is made to touch the ground so that any charge built up can be safely conducted to the earth, reducing the chances of a fire outbreak due to charges igniting the fuel.
Answer:
i think its a, sorry if im wrong
Explanation:
3. Water near the poles receives much less solar energy than the tropical regions and often has water temperatures around 0 degrees Celsius. Why is the water in the polar
regions not completely frozen?
A color
C salinity B density
D phytoplankton
Answer:
Yes
Explanation:
sdfu8hdfhu8dfghgdfijndfgjknfdgjknfgdjkndfgjkndfgklndfgknldfgklmdfgklmdfgkondfgkjnodfgklndfgklndfglknfgdklndfgklndfgklndfgklndfgklndfgpkmfgdklnfdgyklndklndfgklndfglkngdfklndfgljkngdfklndfglkmdfgh
A resistor, an ideal capacitor, and an ideal inductor are connected in parallel to a source of an alternating voltage of 160 V at a frequency of 250 Hz. A current of 2 A flows through the resistor and a current of 0.8 A flows through the inductor. The total current through the circuit is 2.5 A. Assess the resistance of the resistor, the capacity of the ideal capacitor, and the inductance of the ideal inductor (presume that IC > IL).
Answer:
R = 46,25 (Ω)
L = 0,07363 (H)
C = 2,7 *10⁻⁶ (F)
Explanation:
Statement problem does not specify if 160 (V) is peak voltage or RMS value. If 160 (V) is the peak value then for a sinusoidal wave, RMS value is V(rms) = 160 /√3
V(rms) = 92,49 (V)
In each branch: we have
V = I*Z V = voltage through the impedance in (V) , I current in (A)
and Z impedance in Ω
Resistor case Z = R then V = 92,49 = 2 * R
R = 92,49/2 R = 46,25 (Ω)
Inductor case |Z| = wL Then Z = 2*π*f*L V = 0,8 * |wl|
Inductor L in (H) |wL| * 0,8 = 92,49 |wL| = 92,5/0,8 w = 2*π*f 2*3,14*250= 1570
1570*L = 92,49/0,8
L = 0,07363 (H)
In the case of the capacitor
|Z| = 1/wc = 1/1570*c
The current is 2 + 0,8 = 2,8 2,8 - 2,5 = 0,3 (A)
Again V = I*Z 92,49 = 0,3 /1570*C
C = 0,3 / 1570*92,49
C = 2,7 *10⁻⁶ (F)
Which of these describes static electricity?
a temporary charge
a steady charge
plssssssssssssss answer correctly plsssssss correct answers only plsss not in a meen way thx
Answer:
A temporary charge
Explanation:
Static electricity is not steady. Unlike current electricity, it does not have a driving force either in the form of a voltage source or an electromotive force from a cell or a generator. Static electricity is usually due a temporary flow of charges between bodies due unbalanced charges within a system, continuing until equilibrium is achieved.
Answer:
a is correct
Explanation:
What happens when you move two
objects far apart from each other?
A. The force of gravity increases.
B. The force of gravity decreases.
C. Distance does not affect the force of gravity.
D. The friction between the two objects will increase.
Answer:
b
Explanation:
All of the following are true statements regarding line-voltage thermostats and control wiring except a. An electrician's license is often required to run line-voltage control wiring. b. Line-voltage thermostats must be matched to the voltage and current of the circuit. c. Line-voltage thermostats and controls are not as sensitive as low-voltage thermostats. d. Line-voltage thermostats and controls respond faster than low-voltage thermostats.
Answer:
c. Line - voltage thermostats and controls are not as sensitive as low - voltage thermostats.
Explanation:
Line voltage thermostat is a regulator which senses the temperature and maintains it to keep the desired level of the voltage. The license in required for the electricians to work on the voltage control wirings. There is technical aspects which an electrician must understand before working on the circuits and voltage lines.
how is sound produced by using stringed instrument
sound vibrations
Explanation:
akechis pancakes
Answer:
By waves
Explanation:
when sound is being produced by string instruments it uses waves to help create that sound
At a beach the light is generally partially polarized due to reflections off sand and water. At a particular beach on a particular day near sundown, the horizontal component of the electric field vector is 2.8 times the vertical component. A standing sunbather puts on polarizing sunglasses; the glasses eliminate the horizontal field component. (a) What fraction of the light intensity received before the glasses were put on now reaches the sunbather's eyes
Answer:
the glasses received 0.1131 of the total intensity
Explanation:
Given the data in the question;
the intensity is proportional to the electric field amplitude;
now, we assign the electric field of 1 to the vertical component and an electric field of 2.8 to the horizontal component
so;
Horizontal intensity = 1² = 1
Vertical intensity = 2.8² = 7.84
so total intensity = 1 + 7.84 = 8.84
fraction of the light intensity received before the glasses were put on now reaches the sunbather's eyes,
since the sunglasses blocks the horizontal intensity so only the the vertical intensity goes through;
hence
⇒ 1 / 8.84 = 0.1131 of the total intensity
Therefore, the glasses received 0.1131 of the total intensity
An electric motor supplies 2,500 Watts of power in a 220 V circuit. What is the resistance of the motor? Be sure to include the proper units in your answer. Remember... Ω is the unit for Resistance.
Answer:
R = 19.36 ohms
Explanation:
Given that,
The power of an electric motor, P = 2500 Watts
The voltage of the circuit, V = 220 V
We need to find the resistance of the motor. We can find it as follows :
[tex]P=\dfrac{V^2}{R}\\\\R=\dfrac{V^2}{P}\\\\R=\dfrac{(220)^2}{2500}\\R=19.36\ \Omega[/tex]
So, the resistance of the motor is 19.36 ohms.
What is a simple circuit?
Answer:
This is your answer. If I'm right so,
Please mark me as brainliest. thanks!!
Answer:
A simple circuit definition is a closed loop of a conductor that electrons can travel around, usually consisting of a power source (a battery, for example) and an electrical component or device (like a resistor or a light bulb) and conducting wire.
4. A sodium ion has a +1 relative atomic charge which indicates it has one more proton than electron.
This ion is placed in a 4.00 NC electric field. Remember, the charge of one relative atomic charge is 1.60 x 10-19
a. Calculate the force applied to a single sodium ion in this electric field.
Answer:
a
Explanation:
If there are 10 Volts across a 5 Ohm resistor, what is the current?
Answer:
I = 2A
Explanation:
V = IR
10V = I × 5ohms
I = 2A
Answer:
2Ampere
Explanation:
V=IR (ohm's law) so I =[tex]\frac{V}{R}[/tex] =[tex]\frac{10}{5}[/tex]=2Ampere
Four monitoring wells have been placed around a leaking underground storage tank. The wells are located at the corners of a 1-ha square. The total piezometric head in each of the wells is as follows: NE corner, 30.0 m; SE corner, 30.0 m; SW corner, 30.6 m: NW corner 30.6 m. Determine the magnitude and direction of the hydraulic gradient.
Answer:
direction : West to East
magnitude : 6.0 * 10^-3
Explanation:
Given data :
Four ( 4 ) monitoring wells
location of wells = corners of 1-ha square
Total piezometric head in each well ;
NE corner = 30.0 m ;
SE corner = 30.0 m;
SW corner = 30.6 m;
NW corner = 30.6 m.
Calculate for the magnitude and direction of the hydraulic gradient
first step ; calculate for area
Area = ( 1 -ha ) ( 10^4 m^2/ha )
= 1 * 10^4 m^2
Distance between the wells = length of side
= √( 1 * 10^4 ) m^2
= 100 m
Direction of Hydraulic gradient is from west to east because the total piezometric head in the west = Total piezometric head in the east
Next determine The magnitude of the hydraulic gradient
= ( 30.6 - 30 ) / 100
= 6.0 * 10^-3
A student sets up a standing wave of wavelength 6 meters in a coiled spring by moving his hand up and down twice each second. What is the velocity of the wave?
Answer:
Velocity = 12 m/s
Explanation:
Given the following data;
Wavelength = 6 meters
Period = 0.5 seconds. This is due to the fact that the student is moving his hand up and down twice each second.
To find the velocity;
Velocity = wavelength * frequency
But, frequency = 1/period
Frequency = 1/0.5
Frequency = 2
Substituting the values into the velocity formula, we have;
Velocity = 6 * 2
Velocity = 12 m/s
Therefore, the velocity of the wave is 12 meters per seconds.
A young parent is dragging a 65 kg (640 N) sled (this includes the mass of two kids) across some snow on flat ground, by means of a rope attached to the sled. The rope is at an angle of 30 degrees with respect to the ground and the tension in the rope is 160 N. The sled is moving at a constant velocity of 1.5 m/s.
(a) Draw and label all forces acting on the kids + sled system. Indicate the relative size of each force by scaling the length of each force arrow appropriately
(b) Calculate the normal force acting on the system
(c) Calculate the force of friction acting on the system.
(d) Calculate the coefficient of friction between the sled and the snow.
Answer:
b) N = 560 N, c) fr = 138.56 N, d) μ = 0.247
Explanation:
a) In the attachment we can see the free body diagram of the system
b) Let's write Newton's second law on the y-axis
N + T_y -W = 0
N = W -T_y
let's use trigonometry for tension
sin θ = T_y / T
cos θ = Tₓ / T
T_y = T sin θ
Tₓ = T cos θ
we substitute
N = W - T sin 30
we calculate
N = 640 - 160 sin 30
N = 560 N
c) as the system goes at constant speed the acceleration is zero
X axis
Tₓ - fr = 0
Tₓ = fr
we substitute and calculate
fr = 160 cos 30
fr = 138.56 N
d) the friction force has the formula
fr = μ N
μ = fr / N
we calculate
μ = 138.56 / 560
μ = 0.247
The surveillance camera on a satellite at 250 km above the earth is taking pictures of the earth surface. Suppose that the imaging wavelength is 550 nm and the diameter of the camera lens is 40 mm. (a) Calculate the angular resolution of the camera. (b) Suppose that the headlights of a car on the earth are 1.6 m apart, can the camera resolve them
Answer:
a) θ = 1.67 10⁻⁵ m, b) Consequently we must affirm that the vehicle headlights cannot resolve.
Explanation:
a) To find the resolution of the camera we use the Rayleigh criterion for diffraction
a sin θ = m λ
where m = 1 for the first zero of the slit
we must remember that the angles in the experiments are measured in radians and are very small
sin θ = θ
we substitute
θ = [tex]\frac{\lambda}{a}[/tex]
this expression is for a slit, in the case of circular openings the expression must be solved in polar coordinates giving
θ = [tex]1.22 \ \frac{\lambda}{D}[/tex]
where D diameters of the opening
let's calculate
θ = [tex]1.22 \ \frac{550 \ 10^{-9}}{ 40\ 10^{-3}}[/tex]
θ = 1.67 10⁻⁵ m
b) let's use trigonometry to find the separation distance on earth
tan θ = y / x
y = x tan θ
let's calculate
remember that the angles must be in radians
y = 250 10³ tan 1.67 10⁻0-5
y = 4.18 m
as they indicate that the separation of the headlights is y = 1.6m,
we see that this separation is greater than the separation distance separation.
Consequently we must affirm that the vehicle headlights cannot resolve.
A police car drives with a constant speed of 70km/hr. how long will it take to cover a distance of 135km?
(btw, it's a physics question:-)
Explanation:
36. How long does it take a car to slow down from a speed of 54 km/h to 32 km/h over a distance of 65 m? Answer in seconds. 37.
Noah Formula is riding an old-fashioned roller coaster. Noah encounters a small hill having a radius of curvature of 12.0 m. At the crest of the hill, Noah is lifted off his seat and held in the car by the safety bar. If Noah is traveling with a speed of 14.0 m/s, then use Newton's second law to determine the force applied by the safety bar upon Noah's 80-kg body.'
Answer:
1306.66N
Explanation:
Given data
r=12.0 m
v=14 m/s
m= 80kg
From the formula
F= mv^2/r
substitute
F= 80*14^2/12
F= 80*196/ 12
F= 15680/12
F=1306.66N
Hence the force applied is 1306.66N
What is the difference between temperature and heat???
Also what is calorimeter and Thermometer
Answer:
Difference between heat and temperature in tabular form
Heat vs Temperature
1.Heat is a form of energy that can transfer from a hot body to a cold body. and Temperature is the degree of hotness and coldness of a body.
2.Heat is the total kinetic energy and potential energy obtained by molecules in an object. and Temperature is the average K.E of molecules in a substance.
3.Heat flows from hot body to cold body. It rises when heated and falls down when an object is cooled down and It has a working ability. It does not have the working ability
.
4.Its SI unit is “Joule” and Its SI unit is “Kelvin”.
5.It is measured by the calorimeter and It is measured by the thermometer
.
6.It is represented by “Q”. and It is represented by “T”.
Explanation:
A calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity. ... A simple calorimeter just consists of a thermometer attached to a metal container full of water suspended above a combustion chamber.
write the type of energy present in pond water and kerosene?
The energy present in pond water and kerosene are potential energy and chemical energy respectively.
What is energy?Energy is a quantifiable quantity in physics that can be transferred from an item to do work. Thus, we might characterise energy as the capacity to engage in any kind of physical action. So, to put it simply, we can define energy as: Energy is the capacity to carry out work.
Energy "can neither be created nor destroyed but can only be changed from one form to another," according to the rules of conservation of energy. The SI unit for energy is called a joule.
In pond, water is stored during rain and stored potential energy whereas in kerosene, carbon molecules have chemical energy and when it burns, chemical energy revels as thermal energy.
Learn more about energy here:
https://brainly.com/question/1932868
#SPJ2
Describe the phenomenon of lightning?
What is the acceleration of a car at rest that speeds up to 75m/s over 25 seconds?
A. -3.0m/s/s
B. 75 m/s/s
C. 3.0 m/s/s
D. 25 m/s/s
E. Not enough data is given
What is the rarefaction of a longitudinal
wave?
A. the place where the particles are closest together
B. the place where the particles are farthest apart
C. the resting position of the wave
D. how fast the parts of the wave move
Sea
why is gravity on earth important
1. Only about
% of water on Earth is fresh water that is readily available for human consumption.
a. less than 1
b. 5
c. more than 50
d. All water on Earth is fresh water and is easily accessible.
Answer:
Hey mate.....
Explanation:
This is ur answer....
a. Less than 1%3% of the earth's water is fresh. 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost. 0.5% of the earth's water is available fresh water....
Hope it helps you,
Mark me brainliest plz....
Follow me! :D
Question:
1. Only about % of water on Earth is fresh water that is readily available for human consumption.
a. less than 1
b. 5
c. more than 50
d. All water on Earth is fresh water and is easily accessible
Answer:
a. less than 1