Answer:yeah its true
A cd player has a current of 0.1 a flowing through it. if the source voltage is 4v, what is the resistance? R=V/I
Given parameters:
Current of CD player = 0.1A
Source Voltage = 4V
Unknown:
Resistance = ?
Solution:
Based on Ohm's law;
V = I R;
V = voltage
I = current
R = resistance
Input the parameters and solve;
4 = 0.1 x R
R = [tex]\frac{4}{0.1}[/tex] = 40ohms
The resistance of the CD player is 40ohms
Mrs. O'Brien was at the stop light at Kentucky Ave and High School Road. She was nearly late for school so when the light changed green she drove the remaining 220m in 11 seconds. What is her acceleration?
Answer:
Explanation:
20
Draw the net force arrow on the picture to the left.
force arrow on the picture to the left.
The net force is the hypotenuse of the triangle and the value of the net force is 14.14 N.
What is the net force?The net force is the force that has the same effect in magnitude and direction as two or more forces acting together. We know that force is a vector quantity thus it does have both magnitude and direction.
Since force is a vector, we need to look at the direction of the forces in order to find out what the direction of the net force would have to be. A close look at the image would show us that the net force is the hypotenuse of the triangle.
The value of the net force is;
R = √(10)^2 + (10)^2
R = 14.14 N
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Please help me
If a circuit has a current of 0.25 A and a voltage of 3 V, how much resistance is in the circuit? A 0.083 ohms B 0.75 ohms C 1.5 ohms D 12 ohms
Answer:
The resistance in the circuit is 12 ohm.
(D) is correct option
Explanation:
Given that,
Current = 0.25 A
Voltage = 3 V
We need to calculate the resistance
Using ohm's law
[tex]V=IR[/tex]
[tex]R=\dfrac{V}{I}[/tex]
Where, V = voltage
I = current
R = resistance
Put the value into the formula
[tex]R =\dfrac{3}{0.25}[/tex]
[tex]R=12\ ohm[/tex]
Hence, The resistance in the circuit is 12 ohm.
(D) is correct option
true or false: forces have a magnitude and a direction
Plz answer quick this is science
Does the moon control the waves in the ocean?
Answer:
no don't think so
Explanation:
JESUS CHRIST controls everything 100IQ
No, the moon does not directly control the waves in the ocean. The primary factors that influence the formation of waves in the ocean are wind and the interaction between wind and the water's surface.
The moon, however, does play a significant role in influencing the tides, which are the periodic rise and fall of the ocean's surface.
The gravitational force exerted by the moon, as well as the sun to a lesser extent, creates tidal bulges on the Earth. As the Earth rotates, these tidal bulges move around the planet, resulting in the daily cycle of high tides and low tides.
The gravitational pull of the moon is stronger on the side of the Earth facing the moon, causing a high tide, while on the opposite side, a high tide also occurs due to the centrifugal force resulting from the Earth's rotation. The areas in between experience low tides.
While tides can affect the height and intensity of ocean waves near the coastlines, the actual formation and behavior of waves are primarily driven by wind patterns, water depth, and other factors such as underwater topography.
Waves are generated when the wind transfers its energy to the water's surface, creating oscillations that propagate as waves. These waves can travel vast distances across the ocean, even in the absence of tidal influences.
In conclusion, while the moon's gravitational pull influences the tides, it does not directly control or generate the waves in the ocean.
Waves are primarily driven by wind and other factors, whereas tides are the result of gravitational forces acting on the Earth's oceans.
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What is the name of the great white whale?
Answer:
moby di*k
Explanation:
easy 8th grade question plz help
Answer:
1. B
2. A
3. C
Explanation:
hi
how do you think some people are able to use the keyboard of a computer without looking at it ?
pls send the answer fast
Answer:
Because they memorized the keys
Or their just used to using a keyboard
Explanation:
We are constantly surrounded by many types of energy transfers and transformations, showing that energy in a system is conserved. Which of these statements are true about how energy is conserved through transfers and transformations? Choose the two that apply. A. Energy is conserved when a lamp is turned on because some of the electrical energy is transferred into thermal energy. B. Energy is conserved when thermal energy is transferred from your body to a coat. C. Energy is conserved when some of the chemical energy from burning a candle is transformed into thermal energy, while the rest of the chemical energy is transformed into light energy. D. Energy is conserved when electrical energy from a hair dryer is transferred into thermal energy and then transformed by conduction.
Answer:
Energy is conserved when some of the chemical energy from burning a candle is transformed into thermal energy, while the rest of the chemical energy is transformed into light energy.
Energy is conserved when thermal energy is transferred from your body to a coat.
Explanation:
The principle of conservation of energy states that energy can neither be created nor destroyed, but can be transformed from one form to another. This can be regarded as the first law of thermodynamics.
In the answer, we see two major kinds of energy transformation around us. The both cases show the conservation of energy in a system.
3. Tyrone wants to determine how fast a bowling ball travels when it is bowled. He uses a stopwatch to
record, in seconds, the time it takes for the bowling ball to reach the pins. Which unit would be most
appropriate to measure the length of the bowling lane?
A. meters
B. kilometers
C. millimeters
D. centimeters
when did the universe become visible
Where is a bibliography or works-cited list placed within a paper or report?
in the introductory material
at the bottom of each page
at the end
in the appendix
Answer:
at the end
Explanation:
Answer:
at the end of the page
Explanation:
leave a rating for my dying soul please. :)
2. A sphere has a radius of 5.00 cm. with an uncertainty of 5%,
a) what is the percent uncertainty of the volume? _______%
b) What is the volume of sphere with absolute uncertainty? _____ +/ _____cm^3
Answer:
The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]
The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]
Explanation:
Radius of sphere = 5 cm
Radius with uncertainty r'= [tex]5 \pm 0.05[/tex]
Volume of sphere = [tex]\frac{4}{3} \pi r^3=\frac{4}{3} \pi (r')^3[/tex]
[tex]V=\frac{4}{3} \pi (r')^3\\\frac{dV}{dr'}=4\pi (r')^2[/tex]
Where dV is the uncertainty in volume
dr' is the uncertainty in radius
[tex]dV=4\pi (r')^2 dr'\\dV=4 \pi (5)^2(0.05)\\dV=15.70\\V=\frac{4}{3} \pi (r')^3=\frac{4}{3} \pi (5)^3=523.59[/tex]
The percent uncertainty of the volume=[tex]\frac{15.70}{523.59} \times 100=2.99\%[/tex]
The volume of sphere with absolute uncertainty=[tex]523.59 \pm 15.7 cm^3[/tex]
Please answer the question
What symbol do we use for the resultant?
Answer:
8-0!/
Explanation:
A penny is dropped from a building window. If it takes 1.1 s for it
to hit the ground, how high up is the window?
a 150 m
b 2 m
C 16 m
d 6 m
Answer:6m
Explanation:
I guessed the answer and it was right. It was not the tall ones like 16 or 150 because it only took 1.1 second
Given that,
A penny takes 1.1 seconds to hit the ground.
To find,
How high up is the window?
Solution,
When the penny is dropped, its initial velocity is equal to 0 i.e.[tex]u=0[/tex]. The second equation of motion is used to find the relation between position and time. The second equation of motion is :
[tex]s=ut+\dfrac{1}{2}at^2[/tex]
Where
s is the distance
a is acceleration
Here, s = the height of the window from the ground and a = g i.e. acceleration due to gravity
So,
[tex]s=\dfrac{1}{2}gt^2[/tex]
Put all the values,
[tex]s=\dfrac{1}{2}\times 9.8\times (1.1)^2\\\\s=6.05\ m[/tex]
or
[tex]s=6\ m[/tex]
Answer:
The window is [tex]6\ m[/tex] high. The correct option is (d).
Reference:
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Two weeks ago, a new moon occurred. If
someone looked at the night sky tonight, what could they expect to see?
Answer:
Full moon would be seen.
Explanation:
The moon is the natural planet of the earth, which orbits the earth and thus the Sun. It takes 29.5 days for a complete revolution, passing from one phase to another in the process.
Whenever a new moon is observed, it would take 14 days i.e 2 weeks before it turns to a full moon. Thus with respect to the given question, a full moon would be seen.
I need help answering these questions . Please help.
Answer:
Name: ScaleUsed for measure: Categorize and/or Quantify Variables
Measurement scales are used to categorize and/or quantify variables. This lesson describes the four scales of measurement that are commonly used in statistical analysis: nominal, ordinal, interval, and ratio scales.
Hope I helped let me know if I didn't
Can I get an BrainlistQuestion 9 (28 points)
The earth's gravity keeps the moon in orbit by pulling on it. The moon's gravity
A. can only pull on smaller objects such as asteroids but has no effect on the earth
B. pulls back on the earth
C. pushes the moon away from the earth
D. doesn't affect anything
The moon's gravity pulls back on the earth. (B)
The two pulls are EQUAL.
Gravity always produces a pair (2) of equal forces in opposite directions. For example, your weight on the Earth is equal to the Earth's weight on you !
A wooden log has to be carried by two people. If one of them is strong and another is weak, how will they carry the log?
Show with a diagram and also give reason.
Answer:
Explanation:
theey carry it together
A whale swims at a constant speed of 8 m/s for 17 s. What distance did the whale travel in km?
Answer:
0.136 kmExplanation:
whale speed = 8 m/s for 17 sec.
find distance traveled in km
distance = velocity x time
= 8 m/sec. x 17 sec.
= 136 meters x 1 km
1000 meters
= 0.136 km
Newton's second law of motion states that larger things need more force to move them than lighter
things. What would be an example of this law in action?
Answer:
weight of two people
Explanation:
Suppose two people are walking and among the two people, if one is heavier than the other, then the one weighing heavier will walk slower because the acceleration of the person weighing lighter is greater.
2nd Law: F=ma
a= change in velocity/time
a=F/m
say both objects must accelerate at a=2 m/s^2
object A is a wood plank, which is roughly 10 kg
object B is my metal ball, which has a mass of 100kg
now, solving for F applied to both objects
Fwood=(10kg)(2 m/s2)= 20 N
Fmetal=(100kg)(2 m/s2)= 200 N
the F needed to move the metal ball is 10 times greater than the F needed to move the wood plank. Hope this helped, I'm about to go fail my physics exam :)
A cyclist, while overtaking another bike, increases his speed uniformly from 4.2 mis to 6.3 m/s over a time interval of 5.3 s. How far does the cyclist
travel while overtaling?
Answer:
27.82m
Explanation:
The distance of the cyclist can be calculated using the formula:
S = ut + 1/2 (at^2)
Where; S = distance
u = initial velocity
a = acceleration
t = time
However, to find acceleration, we use:
a = v - u/t, where v is the final velocity
According to this question, u = 4.2m/s, v = 6.3m/s, t = 5.3s
a = 6.3 - 4.2 / 5.3
a = 2.1/5.3
a = 0.396m/s^2
Hence, using S = ut + 1/2 (at^2)
S = (4.2 × 5.3) + 1/2 (0.396 × 5.3 × 5.3)
S = 22.26 + 5.56
S = 27.82
Therefore, the cyclist travel in 27.82m
Which particle (proton, neutron, or electron) has a positive charge?
You want to figure out which brand of microwave popcorn pops the most kernels so you can get the most value for your money. You test different brands of popcorn to see which bag pops the most popcorn kernels. What is the dependent variable?
A. Number of kernels popped
B. The brand of microwave
C. The brand of popcorn
D. The type of popcorn
Answer:
A
Explanation:
I think the number of kernels popped is depended on the brand of the microwave or it can be the brand of popcorn but the independent variable is the cause and the dependent variable is the effect
The dependent variable is the Number of kernels popped option (A) Number of kernels popped is correct.
What is dependent variable?In mathematical modeling, statistical modeling, and experimental sciences, there are dependent and independent variables.
Dependent variables get their name because, during an experiment, their values are investigated under the presumption or requirement that they are dependent on the values of other variables according to some law or rule.
The brand of microwave or popcorn brand may affect how many kernels pop, but the independent variable is the cause and the dependent variable is the outcome.
Thus, the dependent variable is the Number of kernels popped option (A) Number of kernels popped is correct.
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What does this experimental investigation lack?
Answer:
Experimental investigations involve a process in which a "fair test" is designed and variables are actively manipulated, controlled, and measured in an effort to gather evidence to support or refute a causal relationship. Experimental investigations have a control group which does not receive any treatment.
Answer: the answer is controll group
Explanation: hopes this help :)
what is the name given to the rate of flow of electric charge
the answer should be and electric current
The rate of flow of electric charge is Electric Current.
What is Electric Current?
The flow of the electricity in a electrical circuit by calculating the amount of electricity flows in the circuit is known as Electric current. The Electric current can be referred by the symbol 'I'. The unit of electric current is Ampere (A).
Some of the characteristics of Electric current are:
If we get the higher or larger value in Ampere then we can confirm that the flow of electricity is more or large.The electricity produced is the flow of electrons.The work done that happened with the moving of electrons can be said to be electrical energy.The Electric current can be described by the formula as,
I = V/R ( Ampere)
I - Current (Unit is Ampere)
V- Voltage (Unit is volts)
R- Resistance. (Unit is ohm).
Thus, Electric current is the rate of flow of electric charge.
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A warehouse is 1980 cm long,1050cm wide and 495cm high. What is the volume in cubic meters?
Answer:
It should be 1,029.105 m³
But I think you can ignore the 105 because it essentially doesn't make a difference
