Answer:
false is the correct answer
Answer:
false
Explanation:
The speed of propagation depends only on the wavelength of the wave.speed of propagation is constant in a given medium; only the wavelength changes as the frequency changes.
You found the distance that you will cover while braking. You can use the expected amount of time for braking to check your answer for distance.
Using the information given in the introduction and the value for distance that you found above, determine the time required for you to stop once you press the brakes. Note that the time for braking is just the time interval t3-t2.
This is the information given in the introduction:_______.
You are driving down the highway late one night at 20 m/swhen a deer steps onto the road 35m in front of you. Your reaction time before stepping on the brakes is 0.50s, and the maximum deceleration of your car is 10m/s2. How much distance is between you and the deer when you come to a stop?
Answer:
Explanation:
First we need to determine the distance covered during deceleration. According to the equation of motion.
S = ut+1/2at²
Given:
u = 20m/s
t = 0.50s
a = -10m/s (deceleration is negative acceleration)
S = 20²+1/2(-10)(0.5)²
S = 400-5(0.5)²
S = 400-5(0.25)
S = 400-1.25
S = 398.75m
If the deer steps onto the road 35m in front of you, the distance between you and the deer when you come to a stop will be 398.75-35 = 363.75m
Pedro is pushing the car with a force of 300 N. A car moved a distance of 7m. Compute the work done by pedro
Answer:
W = 2100 [J]
Explanation:
We must remember that work is defined as the product of force by the distance traveled.
W = F*d
where:
W = work [Joules]
F = force = 300 [N]
distance = 7 [m]
Now replacing:
W = 300*7
W = 2100 [J]
A crane lifts 4 bricks per minute through a height of 1.5m. Find the power that is expected if each brick weighs 100N
A. 2.5w
B. 10.0w
C. 150.0w
D. 600.0w
What is the amount of heat, in calories, given off from a 5 g piece of aluminum when it cools from 80°C to 20°C? The specific heat capacity of aluminum is 0.215 cal/g∙°C. Show your work.
Answer:
Q (heat) = S * m * (T2 - T1) where Q is heat gained (loss), S the specific heat capacity of the substance and T2, T1 are the final and initial temps
Q = .215 cal / (g deg C) * 5 g * (20 - 80) deg C = -64.5 cal
Since the question specifies the heat emitted, then 64.5 cal is the
heat emitted (loss).
What if boy A and boy B pull the heavy cabinet at the same time in opposite directions with 10N and 5N of force perspectively, what will be the net force on the cabinet?
Answer:
Explanation:
Boy b will win and cabinate will move in his direction
15 is maybe the net force
A force is a vector quantity, and the net force on an object is the vector sum of all the forces acting on the object
The net force on the cabinet is 5 Newtons in the direction boy A is pulling
The reason the net force value is correct is given as follows
The known parameter are;
Force with which boy A pulls the cabinet = 10 NForce with which boy B pulls the cabinet = 5 NThe direction boy B pulls the cabinet = Opposite direction to the direction boy A pulls the cabinetRequired:
The net force on the cabinet
Solution:
Let the vector form of the force applied by boy A, [tex]\overset \rightarrow {F_1}[/tex] = 10·i, therefore, the force applied by boy B in the opposite direction is, [tex]\overset \rightarrow {F_2}[/tex] = -5·i
The net force on the cabinet, [tex]F_{NET}[/tex] = [tex]\overset \rightarrow {F_1}[/tex] + [tex]\overset \rightarrow {F_2}[/tex], therefore;
[tex]F_{NET}[/tex] = 10·i - 5·i = 5·i
The net force on the cabinet, [tex]F_{NET}[/tex] = 5 Newton, in the direction of boy ALearn more about net force here:
https://brainly.com/question/14361879
_3. The type of philosophical reflection which trains the mind to think
logically. It is also the ability of the mind to construct and evaluate
arguments
A. Secondary reflection C. Primary reflection
B. Tertiary reflection D, all of the above
Answer:
C. Primary reflection
Explanation:
"Primary Reflection" is the type of philosophical reflection which trains the mind to think logically. It is also the ability of the mind to construct and evaluate arguments.
It's expressed in our ability to think logically; which means it's the ability for the mind to construct and evaluate arguments. It's an important tool when doing philosophy. It's the ability to express and support the claim of one rationally.
Primary reflection is used to examine its object by abstraction. It is usually concerned with technical solutions to problems.
The type of philosophical reflection which is responsible for training of mind is Primary reflection
Primary Reflection can be regarded as type of philosophical reflection which is responsible for the training of mind so the mind can think in a logical way.
Primary reflection can be regarded as important tool in philosophy and
It gives the mind the ability to construct as well as evaluate arguments.
It express the support of claim when it comes to rational mind and can be used in examination of object by abstraction.Therefore, Primary reflection can be regarded as ability that a mind has in construction and evaluation of argument.
Learn more at: https://brainly.com/question/18070108?referrer=searchResults
The questions at the bottom are 1. Both moving at a constant a velocity.2.Both accelerating.3.Both stopped.4.Bith have a force on them so what is the answer
are pool ball collisions elastic
Yes pool ball collisions elastic
Explanation:
I Think yes
Kyle is wondering what he is getting for his birthday. He decides to shake the box that contains his present. Kyle did not realize it, but he was acting like a scientist. What was the first step Kyle took in this situation that a scientist also takes?
Answer: Asking questions
Explanation:
Scientists always start with their question before
Observing anything
An archer shoots an arrow that goes 210m in 1.5 seconds. What is it’s velocity in m/s
A car traveling at a speed of 30 m/s comes to a stoplight. How much time will it take for the car to stop if its acceleration is -4.0 m/s2?
A) 0.75 sec
B) 1.3 sec
C) 7.5 sec
D) -7.5 sec
Answer:
i belive its a or c
Explanation:
egg drop lab report (high school)
Answer:
watch mark rober on yt he explains how to win
Explanation:
look up "Mark rober egg drop"
Answer:
does anyone have the lab report???
Explanation:
The magnitude of the force associated with the gravitational field is constant and has a value FF . A particle is launched from point BB with an initial velocity and reaches point AA having gained U0U0 joules of kinetic energy. A resistive force field is now set up such that it is directed opposite the gravitational field with a force of constant magnitude 12F12F . A particle is again launched from point BB . How much kinetic energy will the particle gain as it moves from point BB to point AA ?
Answer:
The kinetic energy of the particle will be 12U₀
Explanation:
Given that,
A particle is launched from point B with an initial velocity and reaches point A having gained U₀ joules of kinetic energy.
Constant force = 12F
According to question,
The kinetic energy is
[tex]U_{0}=Fx[/tex]....(I)
Constant force = 12F
A resistive force field is now set up ,
Resistive force is given by,
[tex]F_{r}=12F[/tex]
When the particle moves from point B to point A then,
We need to calculate the kinetic energy
Using formula for kinetic energy
[tex]U=F_{r}x[/tex]
Put the value of [tex]F_{r}[/tex]
[tex]U=12Fx[/tex]
Now, from equation (I)
[tex]U=12U_{0}[/tex]
Hence, The kinetic energy of the particle will be 12U₀.
If you have a gold brick that is 2.0 cm by 3.0 cm by 4.0 cm and has a density of 19.3 g/ml, what is its mass
Answer:
It is
Explanation:
1 Answer. The volume is 37.0 cm3Au .
definition of density
Answer:
the degree of compactness of a substance
Explanation:
So how much pressure that is inside something
what is the final speed of an object that starts from rest and accelerates uniformly at 4.0 meters per second over a distance of 8.0 meters
pls help with these two last questions
Answer:
F = 50[N], to the left.
v = 10.52 [m/s]
Explanation:
First problem
In order to solve this problem we must apply Newton's laws, in such a way that we must perform a summation of forces on the horizontal axis. In this way we will analyze each force and the direction of action.
The offensive player is applying a force of 100N to the right, while the defensive player applies a force of 150N to the left. In this way performing the summation of forces we have.
100 - 150 = F
F = - 50 [N]
Note: The negative sign indicates that the resulting force is to the left.
Second problem
We must remember that the definition of speed is equal to the relationship between distance over time.
x = distance = 100 [m]
t = time = 9.5 [s]
v = x/t
v = 100/9.5
v = 10.52 [m/s]
A car is moving at 10 m/s and accelerates at 4 m/s2. How fast is the car going after 4
seconds?
Use the kinematics formula: [tex]v = v_0+at[/tex]
Your initial velocity is 10 m/s. Your acceleration is 4 m/s². The time elapsed is 4 s. And so,
[tex]v=10+4(4) \\v= 26 \text{ m/s}.[/tex]
A box of mass 44 kg is pushed hard enough to set it in motion across a flat surface. The coefficient of kinetic friction between the box and the surface µk = 0.48. What minimum pushing force is needed to keep the box moving at a constant velocity?
a 231n
b 207n
c 178n
d 283n
Answer:
207
Explanation:
For the box to move at a constant velocity, the applied force must cancel the force due to kinetic friction.
F = mu_k * N
N = normal force = weight (= mg) if sliding horizontally
F = mu_k * mg = (0.48)(44 kg)(9.8 m/s^2) = 207 N
a car's initial velocity is +25 m/s, and it accelerated at a rate of +7.5 m/s over a
period of 8.0 seconds what is the car's final velocity?
Use the definition of average acceleration:
a = ∆v / ∆t
Let x be the final velocity. Then
7.5 m/s² = (x - 25 m/s) / (8.0 s)
x = 25 m/s + (7.5 m/s²) (8.0 s)
x = 85 m/s
_______ is a judgement about how true or false a conditional statement is.
A. Related conditional statement
B. Biconditional statement
C. Truth Value
D. Conditional statement
E. Hypothesis
F. Conclusion
G. Definition
Answer: F. Conclusion
Explanation:
Answer:
I think the answer is C. Truth Value
Explanation:
a Truth Value is the attribute assigned to a proposition in respect of its truth or falsehood, which in classical logic has only two possible values
How can empty - shampoo bottles become useful?
An object is moving to the right and experiencing a net force that is Directed to the right .the magnitude of force is decreasing with time the speed of object is
Answer:
hdggdskjn ijwzsa
Explanation:
A man walks 30 m to the west than 5 m to the east in 45 seconds.
A). what is his total distance walked?
B). What is his average velocity?
Answer:
35 m
0.56 m/s west
Explanation:
A) Total distance is the length of the path taken.
30 m + 5 m = 35 m
B) Velocity is displacement over time. Displacement is the difference between the final position and the initial position.
If west is -x, and east is +x, then:
Δx = -30 m + 5 m
Δx = -25 m
v = Δx / t
v = -25 m / 45 s
v = -0.56 m/s
v = 0.56 m/s west
The total distance travelled = 35 m and average velocity = 0.55 [tex]m/s^{2}[/tex]
We have a man who walked 30 m to the west than 5 m to the east in 45 seconds.
We have to find out his total distance walked and his average velocity?
Define Average velocity of a body?The average velocity is defined as the rate of change of displacement per unit time.
[tex]v_{avg} = \frac{x_{2} -x_{1} }{t_{2} -t_{1} }[/tex]
According to the question -
A). The total distance travelled will be equal to = [tex]X_{W} +X_{E}[/tex] = 30 + 5 = 35m
Since, the distance travelled is a scalar quantity, we have used simple addition method.
B). In order to calculate the average velocity, first we will calculate the displacement -
Consider the direction to the west as the + x axis, then -
displacement = [tex]30\overrightarrow{a_{x} } - 5\overrightarrow{a_{x} } = 25\overrightarrow{a_{x} }[/tex]
Magnitude of displacement = 25 x | [tex]\overrightarrow{a_{x} }[/tex]| = 25 x 1 = 25 m
[tex]v_{avg} = \frac{25}{45 } = 0.55[/tex] [tex]m/s^{2}[/tex]
Hence, the total distance travelled = 35 m and average velocity = 0.55[tex]m/s^{2}[/tex]
To solve more questions on Kinematics, visit the link below -
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To ancient peoples, why were planets special?
Answer:
Planets were like gods.
Explanation:
To the people of many ancient civilizations, the planets were thought to be deities. Our names for the planets are the Roman names for these deities. For example, Mars was the god of war and Venus the goddess of love.
Extra water is absorbed from undigested food in the _____.
small
intestine
stomach
large intestine
rectum
Answer: large intestine
Explanation:
mouth grind and moisten food
saliva break down starch into sugar
esophagus transport food from mouth to stomach
stomach churn food, break down food with enzymes
liver add bile to break down fat
pancreas add enzymes to digest protein
gallbladder store bile
small intestine absorb food through villi
large intestine absorb extra water and remove waste from body
Jasper and Gemma are going to play on a teeter totter. Gemma gets on first. When Jasper gets on, Gemma moves into the air, but she does not move to the top.
Which statement could correctly explain the forces acting on the teeter totter? assume that Jasper and Gemma are the same distance from one another.
The forces are balanced because Jasper weighs the same as Gemma.
The forces are unbalanced because Jasper weighs the same as Gemma.
The forces are balanced because Jasper weighs more than Gemma.
The forces are unbalanced because Jasper weighs more than Gemma.
Answer:
it will most likely be a: the forces are balanced because jasper weighs the same as gemma.
Explanation:
Answer:
The correct answer is A.) The forces are balanced because Jasper weighs the same as Gemma.
Explanation:
I just did the test on edge 2021 and got it right
100 POINTS AND BRAINLIST FOR BEST ANSWER!
Please help me i have a 77% in science and i need to bring it up today bc its the end of grades today. If you help me you are seriously the best person in the world, theres 4 questions.
Answer:
Air moves from regions of high pressure to regions of low pressure.
Explanation:
When airs moves horizontally from regions of high pressure to low pressure, it creates wind. If the difference between high and low pressure is greater, then it makes the wind faster.
Best of Luck!
Answer:
C. Air moves from regions of high pressure to regions of low pressure.
Explanation:
The air from the regions of high pressure will hold onto that pressure. So, when it moves into the regions with low pressure it'll turn into wind.
The greater the pressure, the stronger the wind and vise versa.
Hope this helps!
A virtual image of a marble is located 13 cm in front of a diverging lens with a focal length of 29 cm.
Where is the marble located?
PLS ANSWER AM IN DESPERATE NEED OF HELP
Answer:
Image distance = 23.6cm
Explanation:
Given
[tex]Focal\ Length\ (f) = 29cm[/tex]
[tex]Object\ Distance (u) = 13\ cm[/tex]
Required
Determine the image distance (v)
This can be calculated using:
[tex]\frac{1}{f} = \frac{1}{u} + \frac{1}{v}[/tex]
[tex]\frac{1}{29} = \frac{1}{13} + \frac{1}{v}[/tex]
Collect Like Terms
[tex]\frac{1}{v} = \frac{1}{29} - \frac{1}{13}[/tex]
[tex]\frac{1}{v} = \frac{13 - 29}{29 * 13}[/tex]
[tex]\frac{1}{v} = \frac{-16}{377}[/tex]
[tex]v = \frac{-377}{16}[/tex]
[tex]v = -23.5625[/tex]
[tex]v = -23.6\ cm[/tex]
This implies that the image distance is 23.6cm and it is a virtual image.
who was the creator of sports
Answer:
James Naismith (November 6, 1861 – November 28, 1939) was a Canadian-American physical educator, physician, Christian chaplain, sports coach, and innovator.
Explanation:
