Answer:
10 s
Explanation:
Given:
Δx = 100 m
v₀ = 0 m/s
a = 2 m/s²
Find: t
Δx = v₀ t + ½ at²
100 m = (0 m/s) t + ½ (2 m/s²) t²
t = 10 s
A dog walks 8.0 meters due north and then 6.0 meters due east. Determine the magnitude of the dog's total displacement to the nearest tenths
Answer:
the magnitude of the dog's total displacement to the nearest tenths = 53.12°
Explanation:
Given that:
a dog walks 8.0m due to the north and 6.0 m due east.
We can determine the magnitude of the dog's total displacement by using the Pythagoras theorem.
Consider the north direction be the opposite and the east direction to be the adjacent, therefore the hypotenuse will be the dog's total displacement.
So, suppose hypotenuse is represented by a
the opposite represented by b, and the adjacent represented by c
Then;
a² = b² + c²
a² = 8² + 6²
a² = 64 + 46
a² = 100
a =[tex]\sqrt{100[/tex]
a = 10.0 m
However, the magnitude of the dog's total displacement is calculated by taking the tangent of the system.
tan θ = opposite / adjacent
tan θ = b/c
tan θ = 8/6
tan θ = 4/3
tan θ = 1.333
θ = tan⁻¹ (1.333)
θ = 53.12
the magnitude of the dog's total displacement to the nearest tenths = 53.12°
Question number 2 ppllzzzzzzz
A soccer ball is kicked horizontally. What is its average speed if its displacement is 55.0 m after 12.00 s? What formula was used to solve this problem?
4.58 m/s
Speed = displacement / time
Solve.
(3.0 × 107)x (1.5 × 103)
Answer:49594.5
Explanation:
a charge of 12 passes through the filament of a car head lamp bulb in 4 s. what is current?
Answer:
3 A
Explanation:
[tex]current = \frac{charge}{time} \\ = \frac{12}{4} \\ = 3 \: amperes[/tex]
A force of 200N is creating a pressure of 50Pa on a surface. Calculate the area of the surface.
Answer:
4kg
Explanation:
pressure=50pa
force=200N
Area=?
now,
pressure=force/area
50=200/area
area=200/50
area=4kg
The pressure is the forces acting on a given area. Hence, the area of the surface with a pressure of 50 Pa by a force of 200 N is 4 m².
What is force?Force is an external agent acting on a object to deform it or to change its state form motion or rest. Force is a vector quantity and it is characterised by its magnitude and direction. The unit of force is Newton (N).
Pressure is the force applied on unit area. Thus, as the force increases, pressure increases. Pressure can have the units in atm, pa, N/m² etc.
Pressure = Force / area.
Given that force = 200 N
pressure = 50 Pa = 50 N/m²
Therefore, area = force/pressure
= 200 N / 50 Pa
= 4 m²
Therefore, the area of the surface is 4 m².
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Which phrase is not an example of intracellular communication?
A. molecular movement within a cell
B. reaction to pheromones
C.molecule in a cell changes function of cell
D. control of cell division
Answer:
The answer is C
Explanation:
I ave K12 and i just finished it.
The phrase which is not an example of intracellular communication is :
C) Molecule in a cell changes function of cell.
"Intracellular communication"The phrase which is not an example of intracellular communication is the molecule in a cell changes function of cell.
The intracellular communication could be a sort of communication which takes put inside a cell or interior a cell.
The intracellular speaks to inside a cell, subsequently, the development of the particle inside a cell may be with cytoplasmic gushing, cargo vesicle transport or any other instrument will speak to the intracellular communication.
Thus, the correct answer is C.
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If an object is moving and it changes its position by 2 min
every 4 s starting from the origin, then the position vs. time
graph is:
Answer: a straight line with a positive slope
Explanation:
If an object is moving and it changes its position by 2 units every 4 s starting from the origin,
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is meter/second.
Learn more about speed from here If an object is moving and it changes its position by 2 units every 4 s starting from the origin,
speed = distance /time
= 2 units / 4 seconds
= 0.5 units/seconds
Thus, the speed of the object would be 0.5 units /seconds
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the question seems incomplete the complete question is If an object is moving and it changes its position by 2 units every 4 s starting from the origin, then the position vs. time graph is
PLEASE I NEED TO KNOW
A mountain climber encounters a gap in an ice field. The opposite side of the gap is 2.75m lower, and is separated horizontally by a distance of 4.1m. To cross the crevasse, the climber gets a running start and jumps in the horizontal direction. (A) What is the minimum speed needed by the climber to safely cross the gap? (B) What is the climber's velocity right before landing?
Answer:
A) 5.5 m/s
B) 9.2 m/s
Explanation:
A) Given in the y direction:
Δy = 2.75 m
v₀ = 0 m/s
a = 9.8 m/s²
Find: t
Δy = v₀ t + ½ at²
2.75 m = (0 m/s) t + ½ (9.8 m/s²) t²
t ≈ 0.75 s
Given in the x direction:
Δx = 4.1 m
a = 0 m/s²
t = 0.75 s
Find: v₀
Δx = v₀ t + ½ at²
4.1 m = v₀ (0.75 s) + ½ (0 m/s²) (.75 s)²
v₀ ≈ 5.5 m/s
B) Find vᵧ.
v² = v₀² + 2aΔy
vᵧ² = (0 m/s)² + 2 (9.8 m/s²) (2.75 m)
vᵧ ≈ 7.34 m/s
Find v.
v² = vₓ² + vᵧ²
v² = (5.5 m/s)² + (7.34 m/s)²
v ≈ 9.2 m/s
PLEASE HELP ASAP!!!!
T1 = 2×W / squrt (3) +1
T2 = squrt(6) ×W/ squrt (3) +1
Here, T1 is along A.
T2 is along B
W = 250N.
Yo can directly use above formula to find solution.
is the distance traveled during a specific unit of
Answer:
velocity
Explanation:
I think i dont really know
Which of the following examples describe an acceleration? (Check ALL that APPLY)
Group of answer choices
A car has to slow down as it approaches a slower truck in front of it
A car is sitting in a parking lot
A car maintains a speed of 15 mph as it turns around a corner
A car is stopped at a stop light, and speeds up when it turns green
A car drives straight down a road at 60 mph
Answer:#3,#4,#5
Explanation:they each don't stop
In general, which factor is NOT critical when beginning an exercise program? A. using appropriate protective equipment during exercise B. finding friends who like to exercise the same way you do C. seeing your doctor for a physical assessment prior to beginning exercise D. choosing clothing that is designed to match your exercise program Please select the best answer from the choices provided.
O A
О В
O C
PLEASE HELP!!!
Answer:
B. I looked it up I hope it's right
Explanation:
i hope this helps.
Answer:
its obviously C
Explanation:
i smart like dat
The time period of a wave T is the the time taken to produce one complete wave. If the frequency of a wave is 2 Hz, what is it’s time period?
Answer:
0.5s
Explanation:
if the frequency is 2Hz that means it makes 2 complet cycles in one second. The time period for one cycle would be 0.5s
An object of mass 30 kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object. F= ?
Answer:
In free fall, mass is not relevant and there's no air resistance, so the acceleration the object is experimenting will be equal to the gravity exerted. If the object is falling on our planet, the value of gravity is approximately 9.81ms2 .
Explain the process that causes dew to form on blades of grass.
Answer:
AHAHHAH DEW DEW
Explanation:
Condensation causes dew to form on blades of grass. This is because the water molecules react to the grass when it is heated, and the surroundings became cool. The molecules would bring to calm and turn to liquid.Image result for heart eyes cat emoji
If i wanted to determined what part of your brain that you needed not just used in order to respond to the sound of your voice which brain analysis technique should i use
Answer:
The brain analysis technique which allows for identifying which part of the brain is functional per human activity is Neuroimaging.
Explanation:
Brain Imaging (or Neuroimaging) involves the use of direct observation in a living organism of the structure, function and anatomy of its central nervous system.
Cheers!
Describe the relationship between air time and range.
Answer: For the angles below 40, The air time and range are directly proportional meaning that if air time increases, the range increases. Like said earlier, the total traveled distance in the x-direction depends on the initial velocity and time.
hey can anyone help me out in dis pls!
Answer:
A is true ,b is true
Explanation:
The gravitational force between two objects is 3600 N. What will be the gravitational force between the objects if the mass of each object is reduced to one third of its original mass
A. 400 N
B. 1200 N
C. 10,800 N
D. 32,400
Answer:
It will reduce by 9 times and become 400 N.
This question can be solved using the concepts of Newton's Law of Gravitation, and gravitational force.
The gravitational force between the two objects if the mass of each object is reduced to one-third of its original mass will be "A. 400 N".
According to Newton's Law of Gravitation the gravitational force between two objects is given as follows:
[tex]F = \frac{Gm_1m_2}{r^2}[/tex]---------- eqn (1)
where,
F = Gravitational force between objects = 3600 N
G = Universal gravitational constant
m₁ = mass of the first object
m₂ = mass of the second object
r = distance between the objects
Now, the masses have become one-third of the original value:
[tex]F'=\frac{G(\frac{m_1}{3})(\frac{m_2}{3})}{r^2}\\\\F' = \frac{1}{9}\frac{Gm_1m_2}{r^2}\\\\using\ eqn\ (1):\\\\F' = \frac{F}{9} = \frac{3600\ N}{9}\\\\[/tex]
F' = 400 N
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The attached picture illustrates Newton's Law of Gravitation.
Explain the haudralic break system
Answer:
A hydraulic braking system transmits brake-pedal force to the wheel brakes through pressurized fluid.
Explanation:
hey can anyone help me out in dis pls
Answer: 1. Liquid, molecules aren't packed very closely, and take the shape of the bottom of the container 2. Gas molecules are far apart and fill the container completely
Explanation:
A snail can move app approximately 0.30 inches per minute. How many meters can the snail cover in 15 minutes
Answer:
4.5 because just do the math and its 4.5
A car was traveling at a velocity of 8 m/s and then accelerated at a rate of 5 m/sr^2, reaching a velocity of 85 m/s. How far did the car travel at this acceleration rate?
Answer:
716.1 m
Explanation:
A car was travelling at a velocity of 8m/s
It accelerated at 5m/s^2
It finally reached a velocity of 85m/s
The distance can be calculated by applying the fourth equation of motion
V^2= U^2 +2as
V= 85m/s
U= 8m/s
a= 5m/s^2
85^2= 8^2 + 2(5)(s)
7225= 64 + 10s
7225-64= 10s
7161=10s
s= 7161/10
= 716.1 m
Hence the car travelled at a distance of 716.1 m
Which example best represents balanced forces? an elevator stopped on the third floor a basketball shot into a hoop a sled sliding down a snowy hill a tow truck pulling a car out of a ditch
Answer:
an elevator stopping on the third floor
Explanation:
The example that best represent balanced force as regards this question is an elevator stopped on the third floor.
Balanced force can be regarded as resultant force that has a magnitude of zero when acted on an object. When forces that are been subjected on a body are zero then the force is balanced.In the case of the elevator, immediately it stopped at a particular floor, then it will gave a balanced force, because at that point all forces acting on it becomes zeroWhen a car is pushed from a ditch , the force is acting from a side so its not balancedExamples of balanced forces are;
The weight of object as well as normal force acting on it can be regarded as been balanced.When pushing a car at both opposite sides with the same forces.A lizard that hangs in vertical position.Therefore option A is correct, because balanced force exist as the elevator stopped.
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A biker accelerates from rest to 10 m/s in 5 seconds. What is the biker's
acceleration? Calculate for the missing variable
Your answer
Answer:
It starts from rest so Vi=0
Vf=10 m/s
t=5 seconds
Explanation:
a=Vf-Vi/t
a=10-0/5
a=10/5
a=2m/s^s
Sarah throws a ball directly upward at the edge of a cliff with a starting velocity of 3.0 m/s
It lands on the ground with a final speed of 6.0 m/s
How long is the ball in the air?
Round the answer to two significant digits
Answer:
The correct answer is t = 0.92s
Explanation:
Initial velocity v0 = 3.0 m/s
Displacement Δy = ?
Acceleration a = -9.8m/s2
Final velocity v = -6.0m/s
Time t=? Target unknown
We can use the kinematic formula missing Δy to solve for the target unknown t:
V=v0+at
We can rearrange the equation to solve to t:
V-v0=at
t= v-v0/a
Substituting the known value into the kinematic formula gives:
t= (-6.0m/s)-(3.0m/s)
————————————
-9.8m/s2
= -9m/s
—————-
-9.8m/s2
=0.92s
Sarah throws a ball directly upward at the edge of a cliff with a starting velocity of 3.0 m/s. It lands on the ground with a final speed of 6.0 m/s.
How long is the ball in the air?
Answer: 0.92
How long should a spring be stretched for it to store 45 J of energy? The force constant of the spring is
540N/m?
Answer:
x = 0.4 m
Explanation:
When a spring is stretched from its equilibrium position. Some energy is stored in the spring. This energy is called the elastic potential energy of the spring. The formula used to calculate the magnitude of this stored energy is given as follows:
P.E = (1/2)kx²
where,
P.E = Elastic Potential Energy Stored in the spring = 45 J
k = Spring Constant = 540 N/m
x = amount of stretching = ?
Therefore,
45 J = (1/2)(540 N/m)x²
x² = (45 J)(2)/(540 N/m)
x = √(0.167 m²)
x = 0.4 m
A bicycle is going 2.6 m/s when it speeds up to 15.4 m/s in 8 seconds. What is the acceleration?
Answer:
acceleration is 1.6 m/s^2
Explanation:
This is a question involving Kinematics so we can use one of the kinematic equations.
Given info: Vi= 2.6 m/s. Vf= 15.4 m/s. T= 8s
We need to solve for acceleration
The best equation to use is (Vf = Vi + at) as it contains all the info we need to solve for acceleration.
Now substitute the values given into the equation.
Vf = Vi + at >> 15.4 = 2.6 + a8
Now solve for a by rearranging the equation.
15.4 -2.6= 8a >> 12.8=8a >> 12.8/8= 8a/8 >> 1.6 =a
NOTES:
Acceleration is the rate of increase of velocity
Vf is final velocity or velocity after acceleration/de-accaeleration occurs
Vi is intial velocity or velocity before acceleration or de-accaeleration occurs
Time is time it took for a certain motion to occur.
_________________ are labels for ranges of weight that are greater than what is generally considered healthy for a given height.
A. Overweight and obesity
B. Overweight and morbidity
C. Obesity and diabetes
D. Obesity and heft
Answer: A. Overweight and obesity
Explanation:
Overweight and obesity are labeled for ranges of weight that are greater than what is generally considered healthy for a given height. Hence, option A is correct.
What are Overweight and obesity?Overweight and obesity are calculated by Body Mass Index (BMI). BMI is a person's weight in kilograms divided by the square of height in meters. The healthy adult human BMI ranges from 18.5 to 25.
If BMI is less than 18.5, it falls within the underweight range. If the BMI ranges from 25.0 to 29.9, it falls within the overweight range. If the BMI is greater than 30, it comes under the obesity range. A high BMI indicates high fatness.
Obesity and overweight are determined as an abnormal growth or excessive fat accumulation in the healthy range. It is caused by an energy imbalance between calories consumed and calories expended.
Obesity and Being overweight can cause certain diseases and health issues. It increases the risk of high blood pressure, heart disease, diabetes, and stroke.
It is important to maintain a healthy range BMI. Obesity and overweight are reduced by making the choice of healthier foods and regular physical activities like yoga and exercise.
Hence, The correct option is A) Overweight and Obesity.
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