Answer:
infrared light
Explanation:
infrared light
What is difference between magnetic flux and magnetic flux linkage?
Answer:
Magnetic flux has formular: BA while Magnetic flux linkage has formula: NBA
Explanation:
N is number of turns of a coil
B is magnetic flux density across the coil
A is area of coil
[tex].[/tex]
In Physics what's does cos and sin stand for?
Answer:
Sin = Sine
Cos = Cosine
Explanation:
Sin(θ) = Opposite/Hypotenuse
Cos(θ) = Adjacent/Hypotenuse
Which statement is true?
The combustion of biomass can replace fossil fuels in conventional power plants.
Hydroelectric energy uses the energy from the sun, which is a renewable resource.
Oil is a non-renewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply.
Solar energy is a non-renewable resource that is used by many countries all over the world.
Answer:
Hello,
The combustion of biomass can replace fossil fuels in conventional power plants, which is true.
I hope I helped you :)
Nate throws a ball straight up to Kayla, who is standing on a balcony 3.8m above Nate. When she catches it, the ball is still moving forward at a speed of 2.8m/s. With what initial speed did Nate throw the ball?
Answer:
2.8s
Explanation:
because from the presure
TRUE OR FALSE
A moderate risk environment has protected and unprotected left turn
Answer:
Explanation:
True
Which term best describes a fad diet
Answer:
a fad diet is basically a diet that was a trend or that was popular for a short amount of time and makes unreasonable claims for fast and very much wanted results
Explanation:
2. Justin raees his Chevy S-10 down the highway for 30 seconds and travels 2560
meters. What was his average speed?
1 km = 1000 meters
2,560 meters / 1000 = 2.56 km
30 seconds is 1/2 minute
2.56 km x 2 = 5.12 km per minute
1 hour = 60 minutes
5.12 x 60 = 307.2 km per hour
Answer: 307.2 km per hour
Something that accelerates undergoes a
A. Change in velocity per unit time
B. Change in direction
C. Change.
D. Change in velocity
Change in velocity per unit time.
Explanation
Acceleration is defined as rate of change of velocity w.r.t time.
[tex]\boxed{\sf Acceleration=\dfrac{dv}{dt}}[/tex]
In a typical greyhound race, a dog accelerates to a speed of 20 m/s over a distance of 30 m. It then maintains this speed up to 80 m and slowed down to stop at 100 m.a) What would be a greyhound's acceleration between 0 m to 30 m, 30 m to 80 m and 80 m to 100 m?b) What would be the time taken for the entire trip?
For the typical greyhound race we have that:
a) The acceleration of the dog for each section is:
Between 0 m to 30 m = 6.67 m/s²Between 30 m to 80 m = 0 m/s²Between 80 m to 100 m = -10 m/s²b) The time taken for the entire trip is 7.5 s.
a) Let's calculate the greyhound's acceleration for each section:
Between 0 m to 30 m[tex] a = \frac{v_{f}^{2} - v_{0}^{2}}{2\Delta d} [/tex] (1)
Where:
a: is the acceleration =?
[tex]v_{f}[/tex]: is the final velocity = 20 m/s
[tex]v_{0}[/tex]: is the initial velocity = 0 (the dog starts from rest)
Δd: is the change in distance = 30 m - 0 m = 30 m
Then, the acceleration is:
[tex] a = \frac{v_{f}^{2} - v_{0}^{2}}{2d} = \frac{(20 m/s)^{2}}{2*30 m} = 6.67 m/s^{2} [/tex]
Between 30 m to 80 mSince the dog maintains a velocity of 20 m/s up to 80 m, the acceleration is zero. The initial and final velocity is the same, so the acceleration in eq (1) is 0.
Between 80 m to 100 mIn this stage, the dog slowed down to stop at 100 m. This means that the final speed is 0.
We have:
[tex]v_{f}[/tex] = 0 (the dog stops)
[tex]v_{0}[/tex] = 20 m/s (the dog maintained this velocity up to 80 m)
Δd = 100 m - 80 m = 20 m
Hence, the acceleration is (eq 1):
[tex] a = \frac{0 - (20 m/s)^{2}}{2*20 m} = -10 m/s^{2} [/tex]
The minus sign means that the dog is decelerating in the final section.
b) The time taken for the entire trip can be calculated as follows:
[tex] t = t_{0-30} + t_{30-80} + t_{80-100} [/tex] (2)
Hence, the time of each stage is:
Between 0 m to 30 mThe time can be found with the following equation:
[tex] t_{0-30} = \frac{v_{f} - v_{0}}{a} = \frac{20 m/s}{6.67 m/s^{2}} = 3.00 s [/tex]
Between 30 m to 80 mSince the acceleration is 0, the time can be calculated with the next kinematic equation:
[tex] \Delta d = v_{0}t - \frac{1}{2}at^{2} [/tex]
[tex] t_{30-80} = \frac{d_{f} - d_{i}}{v_{0}} = \frac{80 m - 30 m}{20 m/s} = 2.5 s [/tex]
Between 80 m to 100 mThe time is:
[tex] t_{80-100} = \frac{v_{f} - v_{0}}{a} = \frac{0 - 20 m/s}{-10 m/s^{2}} = 2.00 s [/tex]
Therefore, the time taken for the entire trip is (eq 2):
[tex] t = t_{0-30} + t_{30-80} + t_{80-100} = 3.00 s + 2.5 s + 2.00 s = 7.5 s [/tex]
You can find another example of calculation of acceleration here: https://brainly.com/question/19867449?referrer=searchResults
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A soccer player is 15 m from her opponent's goal. she kicks the ball hard; after 0.50s, it flies past a defender who stands 5m away, and continues toward the goal. How much time does the goalie have to move into position to block the kick from the moment the ball leaves the kickers foot?
Answer:
Explanation:
ASSUMING the defender at 5 m is NOT the goalie.
the ball horizontal velocity is 5 m/0.5 s = 10 m/s
The goalie, presumably at the goal line, has 15 m / 10 m/s = 1.5 s to react and move to the ball position.
Must be little league soccer as 10 m/s is a rather wimpy soccer ball speed.
5. A researcher is studying the intensity of hurricanes that entered the Gulf of Mexico between 1975-2015 and the average water temperature of the Gulf of Mexico at the hurricane's peak strength. What is the independent and dependent variable in this study?
Answer:
The independent variable is that entered by the researcher - it does not depend on anything else in the equation
The dependent variable is the result obtained by applying the equation to the independent variable
One variable is entered by the researcher giving rise to the second variable.
In the study given the intensity depends on the average water temperature.
The independent variable is the water temperature and the dependent variable is the maximum strength of the hurricane
In scientific research processes there are several types of variables
* Those that can be controlled or manipulated by researchers, these are called independient variable
* The variables that are measured in the investigation are called dependent variables, these are influenced by the values of the independent and intervening variables
* There is a third type of variable called intervening that affect the results but cannot be identified or controlled by the researchers.
Based on this definition for this case the independent variable must be temperature, even though the researcher cannot control it directly, he can measure its value.
The dependent variable is the intensity or maximum strength and the number of hurricanes that can be measured by the researcher and create a relationship between the intensity as a function of the gulf water temperature.
To learn more about the dependent and independent variables see: brainly.com/question/14501374
P= 2/3(N/V)1/2mv^2
Solve for v
your question:
P= 2/3(N/V)1/2mv^2 Solve for v
answer:
v=√2Vem
A car is traveling along a straight road at a velocity of +30.6 m/s when its engine cuts out. For the next 1.70 seconds, the car slows down, and its average acceleration is. For the next 4.56 seconds, the car slows down further, and its average acceleration is. The velocity of the car at the end of the 6.26-second period is +17.0 m/s. The ratio of the average acceleration values is = 1.55. Find the velocity of the car at the end of the initial 1.70-second interval.
The velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s
Let's evaluate every step
1. Step 1
[tex]v_{i}_{1}[/tex]: initial velocity at step 1 = 30.6 m/s
[tex]v_{f}_{1}[/tex]: final velocity at step 1
[tex]t_{1}[/tex]: time at step 1 = 1.70 s
[tex]a_{1}[/tex]: average acceleration at step 1
The average acceleration in this step is given by:
[tex] a_{1} = \frac{v_{f_{1}} - v_{i_{1}}}{t_{1}} [/tex] (1)
2. Step 2
[tex]v_{i}_{2}[/tex]: initial velocity of step 2 = [tex]v_{f}_{1}[/tex]
[tex]v_{f}_{2}[/tex]: final velocity at step 2
[tex]t_{2}[/tex]: time at step 2 = 4.56 s
[tex]a_{2}[/tex]: average acceleration at step 2
The average acceleration is the following:
[tex] a_{2} = \frac{v_{f_{2}} - v_{i_{2}}}{t_{2}} [/tex] (2)
3. Step 3
This step is given by the sum of step 1 and step 2
[tex]v_{f}[/tex]: final velocity after 6.26 s = 17.0 m/s = [tex]v_{f}_{2}[/tex]
t = t₁ + t₂ = 1.70 s + 4.56 s = 6.26 s
The ratio of the average acceleration is:
[tex] \frac{a_{1}}{a_{2}} = 1.55 [/tex] (3)
By dividing equation (1) into equation (2) we have:
[tex] \frac{a_{1}}{a_{2}} = \frac{\frac{v_{f_{1}} - v_{i_{1}}}{t_{1}}}{\frac{v_{f_{2}} - v_{i_{2}}}{t_{2}}} [/tex]
[tex] \frac{a_{1}}{a_{2}} = \frac{t_{2}(v_{f_{1}} - v_{i_{1}})}{t_{1}(v_{f_{2}} - v_{f_{1}})} [/tex]
By solving the above equation for [tex]v_{f_{1}}[/tex] we have:
[tex]v_{f_{1}} = \frac{\frac{a_{1}}{a_{2}}v_{f_{2}}t_{1} + v_{i_{1}}t_{2}}{\frac{a_{1}}{a_{2}}t_{1} + t_{2}} = \frac{1.55*17.0 m/s*1.70 s + 30.6 m/s*4.56 s}{1.55*1.70 s + 4.56 s} = 25.6 m/s[/tex]
Therefore, the velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s.
You can see another example of average acceleration here: https://brainly.com/question/17050461?referrer=searchResults
I hope it helps you!
a car is traveling north. can its acceleration vector ever Point South? explain
When a car is traveling north, its acceleration vector can point south when it is slowing down.
A vector quantity has both magnitude and direction. The direction of a vector is always shown by the direction to which the arrow points.
If the car is travelling north, the direction of the acceleration vector will continue to point northwards.
However, when the car slows down, the direction of the accelerating vector will now point southwards.
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A thin uniform bar has a moment of inertia II about an axis perpendicular to it through its center. If both the mass and length of this bar are doubled, its moment of inertia about the same axis will be:_____.
A. 2I.
B. 4I.
C. 8I.
D. 16I.
E. I/16.
Answer:
C. 8I.
Explanation:
As moment of inertia for a bar is proportional to the product of its mass and the square of its length, doubling the mass will double the moment of inertia. Doubling the length will quadruple the moment of inertia. Doing both will make the moment of inertia 2(4) = 8 times larger
If Sally could drive a Jetson's flying car at a constant speed of 530.0 km/hr across oceans and space, approximately how long (in years) would she take to drive to a solar system object 10.0 AU away
In compressed state, a spring 3.00 meters long hanging from the ceiling has a potential energy of 2.0 joules. If the entire potential energy is used to release a ball of mass 1.2 kilograms vertically downward, then what is the kinetic energy of the ball when it reaches the ground?
A.
1.2 joules
B.
4.9 joules
C.
2.0 joules
D.
6.8 joules
Answer:
Option C
Explanation:
2.0 Joules
Hope it helps!
which of the following are not vector directions?
A. 35 degrees north of east
B. North
C.Outside 45 degrees
D. 35 degrees inside
Answer:
Hello! Your answer is BELOW.
Explanation:
Outside 45 degrees
35 degrees inside
Hope I helped Hope you make an 100%
-Amelia♥
List three forms of energy and how used
The amount of heat rejected by a heat pump to the high temperature reservoir will always be greater than the amount of heat absorbed from the low temperature reservoir.
a. True
b. False
The amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir. The statement is true.
What is a heat pump?A heat pump is a device that uses a refrigeration cycle to transfer thermal energy from the outside to heat a building. Many heat pumps can also be used to cool a building by removing heat from the enclosed space and rejecting it outside.
Given the statement, the amount of heat rejected by a heat pump to the high-temperature reservoir will always be greater than the amount of heat absorbed from the low-temperature reservoir is true.
To know more about heat pumps follow
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The primary coil of a transformer has 2650 volts and a current of 66 A. What current is in the secondary coil if it has 4700
volts?*
12 =
A
*Round your answer to the nearest thousandth if necessary.
Answer:
117.06 A
Explanation:
V = IR
2650 = 66(R)
2650/66 = R
40.15 = R
V = IR
4700 = I(40.15)
4700/40.15 = I
117.06 = I
Describe three ways that adults continue to guide children's emotions during the school-age
years.
what is transverse wave
Answer:
In physics, a transverse wave is a wave whose oscillation is perpendicular to the direction of propagation of the wave.
hope that helped.
In a transverse wave, the wiggles are up and down.
In a longitudinal wave, the wiggles are back and forth.
You have a 7 cubic foot container filled with mercury that you need to ship to have incinerated at a lab. What is the size of your container in cubic meters?
The size of your container in cubic meters is 0.1981.
Given the following data;
Size = 7 cubic footIn this exercise, you're required to convert the size of a 7 cubic foot container filled with mercury to cubic meters. Thus, we would convert the given size of the container in cubic foot to cubic meters.
Conversion:
1 cubic foot = 0.0283 cubic meter
7 cubic foot = X cubic meter
Cross-multiplying, we have;
X = [tex]0.0283[/tex] × [tex]7[/tex]
X = 0.1981 cubic meter.
Therefore, the size of your container in cubic meters is 0.1981.
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Which substance is a gas at room temperature and atmospheric pressure?
A. Hg
B. CH
C. C2H5OH
D. H20
Answer:
Explanation:
A) Hg is mercury, a metal that is mostly liquid at STP (Standard Temp and Pressure), though some small portion of it will be gaseous in a closed container.
B) CH Methylidyne radical is a gas
It is not a stable compound because carbon has four valence electrons and only one of those is kept occupied by the hydrogen atom.
If this is supposed to be CH₄ which is methane, then also a gas at STP
C) C₂H₅OH is ethanol which is mostly a liquid at STP, though some small portion of it will be gaseous in a closed container.
D) H₂O is water and will be mostly liquid at STP, though some small portion of it will be gaseous in a closed container.
CH₄ methane is the substance that is a gas a room temperature and atmospheric pressure, therefor the correct answer is option B.
What is the matter?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
Hg is liquid at room temperature
CH₄ methane is gas at room temperature
C2H5OH is liquid at room temperature
H20 is liquid at room temperature
CH₄ methane is the substance that is a gas a room temperature and atmospheric pressure, therefor the correct answer is option B.
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Your question seems incomplete the complete question should be ,
Which substance is a gas at room temperature and atmospheric pressure?
A. Hg
B. CH₄
C. C2H5OH
D. H20
If you are given force and time, you can determine power if you can know
(a) watts
(b) energy
(c) distance
Answer:
joules/energy.
Explanation:
power is defined as the rate of work. Hence power=work/time, then you obtain Watts.
Work is the product of force and displacement.
If mass of body is 10 kg then its weight on moon is:
Please help
Answer:
moon gravity is about one sixth of earth gravity
W = 10(9.8/6) = 16 N
Collette has a prediction that college students ' immune systems have declined due to the use of hand sanitizers . This idea is a(n) :
The idea that "students ' immune systems have declined due to the use of hand sanitizers " is a hypothesis.
The term hypothesis refers to an intelligent guess or idea often based which is subject to scientific investigation via experiments.
A hypothesis may be right or wrong. We can only prove a hypothesis by subjecting it to a series of rigorous experiments.
Thus Collette's idea is a hypothesis.
Learn more: https://brainly.com/question/18284466
Urkar is driving down the street at 11 m/s. What acceleration is required for him to slow to a stop in 2 s?
Answer:
-5.5m/s^2
Explanation:
Well first of all, we know that velocity is a vector, therefore acceleration is a vector. And since urkar is slowing down, the acceleration will be negative
V1 = 11m/s
V2 = 0m/s ( bcuz they said to a stop)
t = 2s
a = V2 - v1
- - - - - - - - - -
t
a = 0 - 11
- - - - - - -
2
= - 5.5ms^-2
why do we observe winds blowing towards the equator
Answer:
The cooler air from region of up to 30degree latitude belt on both sides of the equator ,rushes toward the equator ,to take the place of warm rising air. This makes the wind to blow from north and south direction toward equators
