Answer: 1.Emf is the total voltage in the battery while the potential difference is the work done in moving a charge against the electric field between two specific points in the circuit. 2.Emf is always greater than the potential difference.
Explanation:
To me (electrical engineer since 1973), there is no difference. They are two different names for the same thing.
A soccer player kicks a ball horizontally at 25.0 m/s from a bridge, and the ball hits
the ground after 1.5 s.
2
How high is the bridge?
Answer: 11.025 meters.
Explanation:
Ok, we know that the initial velocity is only horizontal, so it does not affect the vertical problem.
Looking only at the vertical problem (because we want to know how high is the bridge) we have that:
The acceleration is the gravitational acceleration, g = 9.8m/s^2
A(t) = -9.8m/s^2
Where the negative sign is because this acceleration is downwards.
For the vertical velocity we integrate over time, as we do not have an initial vertical velocity, there is no constant of integration.
V(t) = (-9.8m/s^2)*t
For the position we integrate over time again, here the constant of integration is the initial vertical position, H, that is the height of the bridge.
P(t) = 0.5* (-9.8m/s^2)*t^2 + H.
Now we know that the ball hits the ground 1.5s after it was kicked, then:
p(1.5s) = 0m
With that we can find the value of H.
0 = 0.5* (-9.8m/s^2)*(1.5s)^2 + H.
H = 0.5*(9.8m/s^2)*(1.5s)^2 = 11.025m
A student walks to the right 25-m along the 800 hall in 15-s. They turn around and walk 15-m to the left in 8.0-s. Calculate the average speed and the average velocity
Answer:
Explanation:
Total distance covered = 25 + 15 = 40 m
Total time = 15 + 8 = 23 s
Average speed = total distance covered / total time
= 40 / 23
= 1.74 m / s
Total displacement = 25 - 15 = 10 m
Total time = 15 + 8 = 23 s
Average velocity = total displacement / total time
= 10 / 23
= .434 m / s to the right .
The average speed of the student is approximately 1.74 m/s, and the average velocity is approximately -1.74 m/s (to the left).
Given:
Distance to the right = 25 m
Time taken to the right = 15 s
Distance to the left = 15 m
Time is taken to the left = 8.0 s
To calculate the average speed and average velocity, we need to use the following formulas:
Average speed = Total distance traveled ÷ Total time taken
Average velocity = Displacement ÷ Total time taken
Calculate the total distance traveled:
Total distance = Distance to the right + Distance to the left
Total distance = 25 + 15 = 40 m
Calculate the total time taken:
Total time = Time taken to the right + Time taken to the left
Total time = 15 + 8.0 = 23 s
Calculate the average speed:
Average speed = Total distance ÷ Total time
Average speed = 40 ÷ 23 = 1.74 m/s
Calculate the displacement:
Displacement = Final position - Initial position
Displacement = (-15 ) - 25 = -40 m
Calculate the average velocity:
Average velocity = Displacement ÷ Total time
Average velocity = -40 ÷ 23 ≈ -1.74 m/s
So, the average speed of the student is approximately 1.74 m/s, and the average velocity is approximately -1.74 m/s (to the left). The negative sign in the average velocity indicates that the student's net direction is to the left.
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A 3.00 kg mass is traveling at an initial speed of 25.0 m/s. What is the
magnitude of the force required to bring the mass to rest in a distance of 62.5m?
Answer:
The magnitude of the force required to bring the mass to rest is 15 N.
Explanation:
Given;
mass, m = 3 .00 kg
initial speed of the mass, u = 25 m/s
distance traveled by the mass, d = 62.5 m
The acceleration of the mass is given as;
v² = u² + 2ad
at the maximum distance of 62.5 m, the final velocity of the mass = 0
0 = u² + 2ad
-2ad = u²
-a = u²/2d
-a = (25)² / (2 x 62.5)
-a = 5
a = -5 m/s²
the magnitude of the acceleration = 5 m/s²
Apply Newton's second law of motion;
F = ma
F = 3 x 5
F = 15 N
Therefore, the magnitude of the force required to bring the mass to rest is 15 N.
Joelle is a manager at a construction company, and she is interested in the chemistry behind
the materials they use. She has begun studying the materials used to fill walls. She knows
that to keep the temperature inside a room steady the material must be a thermal insulator,
and she predicts that materials should not be acidic or else they would dissolve too easily in
water
Answer: C6H6
Explanation:
I did it and got it right
Answer:
Yes the answer is C6H6
Explanation:
I just took the test
Which statement describes a socialist government?
Answer:
Socialism is a political, social, economic philospohy. Socialist governtment is a form of governtment in which the means of production are owned by the government of the country.
Explanation:
(i thought you could find this in google)
Answer:
Socialism is a political, social, and economic philosophy encompassing a range of economic and social systems characterized by social ownership of the means of production. ... Social ownership can be public, collective, cooperative, or of equity. Socialism is an economic and political system. It is an economic theory of social organization. It states that the means of making, moving, and trading wealth should be owned or controlled by the workers. This means the money made belongs to the workers who make the products, instead of groups of private owners.Socialist government is a form of government in which the means of production are owned by the government of the country. Social systems in this form of government are the ones are divided into the market and the non market forms. The means of transportation are controlled by the government here.
If you run 12 km at an average speed of 4 km/h, how
much time does it take?
Answer:
3 hours, I think
Explanation:
Answer:
3
Explanation:
2. Elements in the same group have similar properties because they have O the same number of protons O the same number of valence electrons O the same number of energy levels with electrons O the same total number of electrons
write 2 examples of Base physical quantities and their standard unit
Answer:
length centimeters or meters
time seconds
A student clicks the mouse at time intervals of 1.60, 2.10, 2.40, 1.90 what is the standard deviation of this dataset.
A. 0.22
B. 0.25
C. 0.29
D. 0.58
The idea that people behave in odd ways on a full moon is an example of a limitation of science. a characteristic of science. pseudoscience. scientific knowledge.
Answer:
Pseudoscience
Explanation:
Because its is based on beliefs with a explanation
Answer:
The answer to your question is B.pseudoscience
Explanation:
Pseudoscience means a collection of beliefs or practices mistakenly regarded as being based on scientific method.
I also did the test and got a 100 % on it.
PLZ MARK BRAINLIEST
17. The weight of an object on a given planet can be found by using the formula W = mg, where W is the weight of the object measured in newtons, m is the mass of the object measured in kilograms, and g is the acceleration due to gravity on the planet measured in meters per second squared. An object on Earth has a weight of 150 newtons. If the acceleration on earth is 9.8 m/sec?, on Mercury it is 3.6, on Saturn it is 11.1 and on Jupiter it is 26, on which planet would the same object have an approximate weight of 170 newtons?
Answer:
Saturn
Explanation:
W = mg
150 N = m (9.8 m/s²)
m = 15.3 kg
W = mg
170 N = (15.3 kg) g
g = 11.1 m/s²
The planet is Saturn.
Write a hypothesis about the effect of the fan speed on the acceleration of the cart. Use the "if . . . then . . . because . . .” format and be sure to answer the lesson question: "How does an object's position and velocity change as the object accelerates?”
Answer:
If the fan speed increases, then the acceleration increases because a greater fan speed supplies more energy to move the cart.
Explanation:
Edge
Academic integrity only relates to a. Online learning c. Instances of cheating b. All subjects d. Any academic situation I give brainliness
Answer:
answer is d.
Explanation:
are you going to mark me brainlinessist
a woman drops a rock from a bridge to the water 17.5 m below. with what speed does the rock strike the water?
a. 0 m/s
b. 18.5 m/s
c. 171m/s
d. 9.8 m/s
e. 17.5 m/s
Given :
Height from which rock is dropped, h = 17.5 m.
Initial velocity, u = 0 m/s.
To Find :
Speed does the rock strike the water.
Solution :
We know, by equation of motion :
[tex]v^2-u^2=2as[/tex] ......( 1 )
Here , a = g = 9.8 m/s² ( Acceleration due to gravity )
Putting all given values in 1 , we get :
[tex]v^2-u^2=2as\\\\v=\sqrt{2gh}\\\\v=\sqrt{2\times 9.8\times 17.5}\ m/s\\\\v=18.5\ m/s[/tex]
Therefore, speed with rock strike the water is 18.5 m/s.
Hence, this is the required solution.
What is the unit of measurement used in physics for speed?
Answer: metre per second
The unit of speed is the metre per second, but the most common speed in everyday usage is the kilometre per hour in the US and the UK, miles per hour.
Name three properties that can be observed in a substance.
Color, Opacity, Hardness
The three properties that can be observed in a substance will be density, physical state, and color.
What is the substance?A kind of matter with predictable chemical composition and physical characteristics is referred to as a chemical substance. According to certain texts, a chemical compound cannot be physically divided into its component parts without rupturing chemical bonds.
A substance's physical property is a quality that can be seen or quantified without affecting the substance's identity. Color, density, hardness, and boiling and melting points are examples of physical qualities. The capacity of a material to go through a certain chemical transition is described by its chemical property.
The three properties that can be observed in a substance will be density, physical state, and color.
The three characteristics of a substance that can be seen are its density, physical condition, and color.
More about the substance link is given below.
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Who is the father of physics?
Answer:sir Isaac Newton is known as the father of physics.
Explanation:
Where mud you be standing if the Sun appears to be directly overhead at noon
Answer:
A
Explanation:
Bile helps in the digestion of —————-
Answer:
Bile helps in the digestion of fats
The word “cumulative” means that something builds on itself. Which example best shows how scientific knowledge is cumulative? A. Watson and Crick worked together to come up with the model of DNA. B. Kepler based his laws of planetary motions off of Newton’s law of gravity. C. Hardy and Weinberg independently came up with a population equation. D. Darwin and his grandfather both worked on the ideas of survivability.
Answer:
B
Explanation:
Kepler embodied cummulative knowledge(succession).
Answer:
your answer is B
Explanation:
i got it right lovely's
Subduction occurs when:
-a plate with continental crust sinks beneath a plate with
oceanic crust
-a plate with oceanic crust sinks beneath a plate with
continental crust
-two plates move apart from one another
two plates slide past one another
Explanation:
a plate with oceanic crust sinks beneath a plate with
continental crust is the answer
A 0,34-kg volleyball is flying west at 1,98 m/s when it strikes a stationary 0,60-kg basketball dead centre. The volleyball rebounds east at 0,79 m/s. What will be the velocity of the basketball immediately after impact? Choose the east direction as positive.
Explanation:
use the law of conservation of momentum
M1U1+M2U2=M1V1+M2V2
m-mass
u-initial velocity
v-final velocity
1-volleyball
2-basket ball dead center
so using the above formula
0.34×1.98+0.64×0=0.34×0.79+0.64×V2
to get
0.6732+0 = 0.2686+0.64V2
0.4046=0.64V2
divide both sides by 0.64 to get V2 which is the final velocity of basketball
0.6322m/s=V2
The final velocity of the basketball after the impact is 1.643 m/s west.
The given parameters;
mass of the volleyball, m = 0.34 kginitial velocity of the volleyball, u₁ = 1.98 m/smass of the stationary basketball, m₂ = 0.6 kgfinal velocity of the volleyball, v₁ = 0.79 m/sThe final velocity of the basketball after the impact is calculated by applying the principle of conservation of linear momentum;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
0.34(-1.98) + 0.6(0) = 0.79(0.34) + 0.6(v₂)
-0.673 = 0.316 + 0.6v₂
-0.989 = 0.6v₂
[tex]v_2 = \frac{- 0.989}{0.6} \\\\v_2 = -1.643 \ m/s\\\\v_2 = 1.643 \ m/s \ west[/tex]
Thus, the final velocity of the basketball after the impact is 1.643 m/s west.
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hey can anyone help me out in dis pls!
Answer:
D
Explanation:
Answer:it’s a
Explanation:
who is good at physics pls come here and help me!!1
Answer:
It wont change its mass
A
Explanation:
A man is paddling a kayak with the force of 254 N, at an acceleration of 1.39 m/s2. If the kayak weighs 30 kg, what is the mass of the man?
Convert 10,000 inches to miles.
2. The speed of light is 299,792,000m's. What is the speed in km's?
Answer:
299 792 kilometers
Explanation:
What is the difference berween uniform velocity and non uniform velocity
Answer:
Uniform Velocity means in a certain limit a body is moving with same speed. And non- uniform Velocity happens when body is moving with different speed.
Explanation:
Answer:
Uniform Velocity means in a certain limit a body is moving with same speed. And non- uniform Velocity happens when body is moving with different speed.
Explanation:
PLEASE HELPPP YALL
Please help me with this question; with steps though because I have to show my work. Thank you. I'll give brainliest to first response and five star ratings!! Please helppppp
Explanation:
Just shift everything except r to the other side.
[tex]r = \sqrt{ \frac{3v}{\pi \: h} } [/tex]
A Tale f Two Elephants
1. what organisms are shown?
2. Do they look the same?
3. Do the pictures show the same species?
4. How are they similar?
5. How are they different?
Answer:
u need it now?
Explanation:
I'll answer it
Based on the diagram above, the organisms that are shown are elephants.
What is a species?A species simply refers to a biological classification of related organisms that have the same (similar) characteristics and they are capable of mating (breeding) with one another in a cycle (different seasons).
Based on the diagram above, we can logically deduce that the organisms shown are species of elephants and they look similar due to the following points:
They both have a single tail.They both have ears.They both have four legs.They both have tusk.However, an obvious difference between them is the number of tusk.
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