Answer:
I got you.. i'm in middle school and had that same question.
Explanation:
Refer to the diagram shown below.
The vertical distance traveled is
s = 25 m
The initial vertical launch velocity is zero.
Therefore
s = (1/2)*g*t²
where g = 9.8 m/s²
t = the time of flight, s
That is,
0.5*9.8*t² = 25
t² = 25/4.9 = 5.102
t = 2.26 s
Answer: 2.26 s
Attachment Lab:Conservation of Linear Momentum
Answer:
This is what I got the teacher hasn’t graded it yet so sorry if it’s not right
Explanation:
please help!!! I will mark brainly.
A parachute on a drag-race car opens and changes the velocity of the car from 75 meters per second to 25 meters per second in just 5 seconds. Calculate the acceleration of the car.
Explanation:
v = u + at
25 = 75 + a * 5
25 = 75 + 5 a
a = 25 - 75/5
a = -50/5
a = -10m/sec^2
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Which of the following are examples of Multiple Intelligences:
•being good at sales
•being good at rapping or beatboxing
•being good at math
•all the above
Answer: All of the above.
Explanation:
An object on Earth weighs 150 N. What is its mass?
15 g
150 kg
150 g
15 kg
Answer:
15kg
Explanation:
mass = weight / gravitational field strength
mass = 150 / 9.8 = 15kg (nearest whole no)
The mass of the object on earth whose weight is 150 N will be 15.3 Kg
What is Mass?Mass is the amount of matter present inside a body. It is defined as the product of density and volume. It remains constant through out the universe. Mathematically -
M = ρV
where -
M is Mass
ρ is density
V is volume
Given is your weight on earth which is equivalent to 150 N.
We know that the weight of of an object is a force exerted by the earth towards its center. It can be written as -
W = mg
Weight of the object = [W] = 150 N
Acceleration due to gravity on earth = [g] = 9.8 m/s²
Substituting the values -
150 = m x 9.8
m = 150/9.8
m = 15.3 Kg
Therefore, the mass of the object on earth whose weight is 150 N will be 15.3 Kg.
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6. A light ray strikes a reflective plane surface at an angle of 560 with the surface.
a) Find the angle of incidence.
b) Find the angle of reflection.
c) Find the angle made by the reflected ray and the surface.
d) Find the angle made by the incident and reflected rays.
Answer:
deez nouts
Explanation:
A boxer hits a punching bag and gives it a change in momentum of 12 kg multiplied by m divided by s over 7.0ms what is the magnitude of the net force on the punching bag
Answer:
1714N
Explanation:
The change in momentum of an object is the product of mass and the change in velocity
The magnitude of the netforce can be calculated using 12kg/7.0ms
But we can convert 7ms to "s" = 7× 10^-3s
F= Force = 12/7×10^-3= 1714N
Hence, the magnitude of the net force on the punching bag is 1714N
A 60 kg adult and a 30kg child are passengers on a rotor ride at an amusement park as shown in the diagram above. When the rotating hollow cylinder reaches a certain constant speed, v, the floor moves downward. Both passengers stay "pinned" against the wall of the rotor, as shown in the diagram below.
The magnitude of the frictional force between the adult and the wall of the spinning rotor is F. What is the magnitude of the frictional force between the child and the wall of the spinning rotor?
Answer:
fr ’= ½ F
Explanation:
For this exercise we use the translational equilibrium equation, on the axis parallel to the wall
fr - W = 0
fr = W
for the adult man they indicate that the friction force is equal to F
F = M g
we write the equilibrium equation for the child
fr ’= w’
fr ’= m g
in the statement they tell us that the mass of the adult is 2 times the mass of the child
M = 2m
we substitute
fr ’= M / 2 g
fr ’= ½ Mg
we substitute
fr ’= ½ F
therefore the force of friction in the child is half of the friction in the adult
would someone just answer this now?
Answer:
x=36.5 m
Explanation:
Rectangular Components of a Vector
A vector can be expressed as an ordered pair (x,y) where x is the x-coordinate, and y is the y-coordinate of a rectangular system.
It can also be given as a magnitude-angle pair (r,θ) where θ is measured from the positive x-axis. It's also known as polar coordinates.
The conversion from polar to rectangular coordinates is:
[tex]x=r\cos \theta[/tex]
[tex]y=r\sin\theta[/tex]
We are given the vector as a magnitude r=47.3 m and at an angle θ=39.4°. The x-component of the vector is:
[tex]x=47.3\cos (39.4^\circ)[/tex]
Using a scientific calculator to find the trigonometric function:
[tex]x=47.3\cdot 0.7716[/tex]
x=36.5 m
which would have more momentum an elephant standing in one place or a small bird slowly flying through the air
Answer:
Elephant
Explanation:
has a larger mass which equates to greater momentum
A car of mass 500 kg travelling at 36 km/hr brought to
rest over a distance of 40m find the average retraldation and
average braking force
Answer:
Explanation:
mass, m = 500 kg
initial velocity, u = 36 km/h = 10 m/s
final velocity, v = 0
distance, s = 40 m
[tex]v^{2} = u^{2} + 2as[/tex]
[tex]0^{2} = 10 ^{2} +[/tex] 2 × a × 40
0 = 100 + 80 a
- 80a = 100 - 0
-80a = 100
a = -100 / 80
a = -1.25 m/[tex]s^{2}[/tex]
force, f = ?
mass = 500 kg
acceleration = -1.25 m/s^2
f = ma
= 500 × -1.25
= -625 N
Hope this helps
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A key lime pie in a 10.00 in diameter plate is placed upon a rotating tray. Then, the tray is rotated such that the rim of the pie plate moves through a distance of 208 in. Express the angular distance that the pie plate has moved through in revolutions, radians, and degrees. A) Find the angular distance in revolutions, radians and degrees. B)If the pie is cut into 5 equal slices, express the angular size of one slice in radians, as a fraction of .
Answer:
A
The distance in revolutions is [tex]n = 7 \ revolutions[/tex]
The distance in degrees is [tex]\theta =2529 ^ o[/tex]
The distance in radian is [tex]\theta_{radian } = 44.15 \ rad[/tex]
B
[tex]\theta_a = 1.26 \ rad[/tex]
Explanation:
From the question we are told that
The diameter of the pie is [tex]d = 10.00 \ in[/tex]
The distance covered by the rim is [tex]D = 208 \ in[/tex]
The number which the pie is divided into is k = 5
Generally the radius of the pie is mathematically represented as
[tex]r = \frac{d}{2}[/tex]
=> [tex]r = \frac{10}{2}[/tex]
=> [tex]r = 5 \ in[/tex]
Generally the distance covered by the rim is mathematically represented as
[tex]D= 2 \pi r n[/tex]
=> [tex]208 = 2* 3.142 * 5 * n[/tex]
=> [tex]n = 7 \ revolutions[/tex]
Generally converting to degrees
[tex]\theta = n * 360[/tex]
=> [tex]\theta = 7 * 360[/tex]
=> [tex]\theta =2529 ^ o[/tex]
Generally converting to radian
[tex]\theta_{radian } = \frac{\theta * \pi}{180 }[/tex]
=>[tex]\theta_{radian } = \frac{2520 * 3.142 }{180}[/tex]
=>[tex]\theta_{radian } = 44.15 \ rad[/tex]
Generally the angular size of one piece of the pie is
[tex]\theta_a = \frac{2 * \pi }{ k}[/tex]
=> [tex]\theta_a = \frac{2 * 3.142}{ 5}[/tex]
=> [tex]\theta_a = 1.26 \ rad[/tex]
(a) The angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.
(b) The angular size of one slice in radians is 2π radian.
The given parameters;
diameter of the pie, d = 10 mradius of the pie, r = 5 mdistance traveled by the rim, d = 208 in = 5.28 mThe angular distance traveled by the pie plate is calculated as follows;
2πr = 5.28
[tex]2\pi = \frac{5.28}{r} \\\\2 \pi = \frac{5.28}{5} \\\\2\pi = 1.056 \ rad\\\\\frac{1 \ rev}{2\pi \ rad } \times 1.056 \ rad = 0.168 \ rev[/tex]
[tex]1.056 \ rad \times \frac{360^0}{2\pi \ rad} = \ 60.5^0[/tex]
Thus, the angular distance is 0.168 revolution, 1.056 radians and 60.5⁰.
The circumference of the pie is calculated as follows;
C = 2πr
C = 2π x 5
C = 10π
Diving the pie into 5 equal slice;
[tex]Fraction \ of \ one \ part \ in \ radian= \frac{10\pi}{5} = 2\pi\ radian[/tex]
Thus, the angular size of one slice in radians is 2π radian.
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define pressure. write it's Si unit.
whats the net force
Answer:
13 N to the left
Explanation:
the right side adds up to 1550 13 less than the other side. the box will then be pushed left with 13 newtons of force.
9. An object is launched at a velocity 40m/s in adirection making an angle of 60° upward with the horizontal.
a)what is the maximum height reached by the object?
b)what is the time of the object?
c)what are the horizontal and vertical componenet of vectors?
Answer:
a) 61.224 m
b) t = 7.070 seconds
c) horizontal component = 20 m/s; vertical component = 34.641 m/s
Note: I rounded all of these values to the nearest thousandth but if you want the precise values please read the explanation below.
Explanation:
Horizontal and Vertical Components:Let's start this problem by solving for the horizontal and vertical components of the initial velocity vector.
We can solve for these x- and y-components by using the formulas:
h. component: [tex]v_i \times cos \theta[/tex]v. component: [tex]v_i \times sin \theta[/tex]Where [tex]v_i[/tex] is the initial velocity (here it's given to us: 40 m/s) and [tex]\theta[/tex] is the angle at which the object is launched above the horizontal (it's also given to us: 60°).
Substitute these given values into the formulas to solve for the horizontal and vertical components:
h. component = [tex]40 \times $cos(60)[/tex] v. component = [tex]40 \times $sin(60)[/tex]Input these values into a calculator and you will get:
h. component = 20 m/sv. component = 34.641 m/sTime of the Object:Now we want to solve for the time t of the object before finding the maximum height of the object. In other words, the max height of the object is its vertical displacement at half of the time t we're about to find.
In order to solve for t, we can use one of the constant acceleration equations we are given in Physics. This equation is:
[tex]v_f=v_i+at[/tex]The time t is always solved for by using the vertical (y-direction) motion of the object in projectile motion, so therefore, we are going to be using this equation in terms of the y-direction.
[tex](v_f)_y = (v_i)_y + a_yt[/tex]Time is the same regardless of the x- or y- direction.
Now, we don't necessarily know the final velocity of the projectile, but we do know its final velocity in the y-direction at the very top of the trajectory, which is 0 m/s.
We can use this to our advantage and solve for only half of the time t, then multiply it by 2 at the end to get the full time that the object is in the air.
We have already solved for [tex](v_i)_y[/tex], which is the vertical component. We know that an object in projectile motion has an acceleration of -g in the y-direction, so we use -9.8 m/s² for a.
[tex]0=(40\times $sin(60)) + (-9.8)t[/tex]Subtract the vertical component from both sides of the equation.
[tex]-(40 \times $sin(60))= -9.8t[/tex]Divide both sides of the equation by -9.8 in order to solve for t.
[tex]\text{t}=3.534797566\ \text{seconds}[/tex]Remember that this is only half of the time that the object spends in the air. However, this is the time that it takes for the object to reach its maximum height, which we will use later. For now, let's say that the time of the object is 2t.
[tex]\text{2t = 7.069595132 seconds}[/tex] Maximum Height of the Object:In order to find the maximum height of the object, let's use another kinematic equation for constant acceleration:
[tex]$x_f=x_i+v_it+\frac{1}{2} at^2[/tex]Since we are still dealing with the y-direction, we can change this equation to be in terms of y.
[tex]$(x_f)_y = (x_i)_y + (v_i)_yt + \frac{1}{2} a_yt^2[/tex]The displacement in the y-direction, or the vertical displacement, can be modeled by subtracting [tex](x_i)_y[/tex] from both sides of the equation.
[tex]$\triangle x_y = (v_i)_yt + \frac{1}{2} a_yt^2[/tex]In order to solve for the maximum height of the object, we want to use the time t that it takes for the object to reach its highest point, which we found was ~3.53 seconds. This is true because the object essentially follows the movement of a parabola.
We know the vertical component [tex](v_i)_y[/tex] , and we know the acceleration in the y-direction is -g, so let's substitute these values into the formula for vertical displacement and solve for [tex]\triangle x_y[/tex].
[tex]$\triangle x_y = (40 \times \text{sin}(60))(3.534797566) + \frac{1}{2} (-9.8)(3.534797566)^2[/tex] [tex]$\triangle x_y = (122.4489796) + \frac{1}{2} (-9.8)(3.534797566)^2[/tex] [tex]$\triangle x _y = (122.4489796) -(4.9 \times 3.534797566^2)[/tex] [tex]$\triangle x_y = (122.4489796) - (61.22448978)[/tex] [tex]$\triangle x_y = 61.2244898[/tex]The maximum height of this object in projectile motion is 61.224 m.
(This answer exceeded the character limit if I included the "Helpful Shortcuts" section, so I included it as an attachment in case you're interested.)
A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. At its maximum height, the speed of the ball is
Answer:
0 m/s
Explanation:
In this problem,
A ball thrown vertically upward reaches a maximum height of 30 meters above the surface of Earth. We need to find the speed of the ball at the maximum height. When an object reaches its maximum height, after then it starts to decrease its speed. As a result, the speed of the ball will be equal to 0 m/s.
The speed of the ball thrown upwards is zero when the object reaches maximum height.
The given parameter:
maximum height, h = 30 mThe velocity of an object thrown upwards decreases with time because the object is moving against gravity, and the eventually becomes zero when the object reaches maximum height.
[tex]v_f = v_0 - gt= 0[/tex]
Thus, the speed of the ball thrown upwards is zero when the object reaches maximum height.
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HELPP!! Does anybody have the answer key to Lab Report: Conservation of Linear Momentum for my online class for physics?? WILL GIVE 80points
Answer:
Try copy and pasting the intructions it into google, and it should pop up if it exists.
Hope this helps.
Explanation:
Answer:
Send me the download of the lab and I will complete it for you
How does a battery supply electrical energy to a circuit?
A. Chemical reactions in a battery cause positively and negatively
charged particles to separate and become concentrated at the
battery terminals.
B. Chemical reactions in a battery cause positively and negatively
charged particles to concentrate in the center of the battery.
C. The force of attraction between positively and negatively charged
particles generates electrical energy within the battery.
O
D. Negatively charged particles that are concentrated at the negative
terminal are repelled from one another, forcing them into a
conducting wire.
ko
Answer: A.
Explanation:
took the test just now
A battery supplies electrical energy to a circuit Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals. The correct option is A.
What is a chemical reaction?A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products
Chemical reactions in a battery cause positively and negatively charged particles to separate and become concentrated at the battery terminals resulting in the transformation into electrical energy therefore the correct option is A.
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Which of these determines an objects ability to sink or float in water?
Group of answer choices
1A. Density
B. Volume
C. Mass
D. Weight
Answer:
C. Density
Explanation:
ILL GIVE YOU ANYTHING TO ANSWER THIS!! IM HELPING MY CRUSH AND IDK THE ANSWER TO THIS PLZ HELP!
C is your answer. PH is an acidic trait used to define just how acidic an acid is. Since you are classifying an acid it would go in C with PH.
Moon A has a mass of 3M and a radius of 2R. Moon B has a mass of 4M and a radius of R. What is the ratio of the force of gravitational attraction of Moon A for Moon B to the force of gravitational attraction of Moon B for Moon A?
A.) 1:1
B.) 1:5.3
C.) 5.3:1
D.) 0.75:4
Answer:
c
Explanation:
5.3" (and any subsequent words) was ignored because we limit queries to 32 words.
Which forces keep the bottle moving
round and round?
Answer:
Centripetal force
Explanation:
The force that keeps a bottle moving round and round in circular motion is centripetal force.
Centripetal force is an inward directed force that keeps a body in circular motion. This force keeps a body moving along a circular path.
To find the force, we use the expression below;
F = [tex]\frac{mv^{2} }{r}[/tex]
F is the centripetal force
m is the mass of the body
v is the velocity
r is the radius
what is focus of convex
Answer: lens is thicker at the central egde
Explanation:
What is SI unit for distance
Answer:
meter
The SI unit of distance and displacement is the meter [m].
Explanation:
have advancedd
Answer:
meter
Explanation:
it is meter I hope this is helpful
The energy released or absorbed by a substance during a change of state
Answer:
Specific latent heat or specific vaporation vaporization heat
on:
Uses mass only do to no temperature change only state
A subway car moves at a constant speed of 10 m/s over a period of 10 s. What is the instantaneous speed halfway through this motion
Answer: 10 m/s
We're told the speed is constant, so it's not changing throughout the time period given to us. So throughout the entire interval, the speed is 10 m/s.
Select the correct answer
All of the following will help you safely cool foods EXCEPT:
A After a meal put leftovers in a deep container so the food cools down more slowly.
B Put cold foods away immediately after purchasing.
c.
Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic.
D. Transfer cold foods directly from the refrigerator to the cooler when going out.
If someone knows this answer please help me
Answer:
I may be a little late, but it's A i got it right on the exam
Explanation:
All of the following will help you safely cool foods except after a meal put leftovers in a deep container so the food cools down more slowly, therefore the correct answer is option A.
What is thermal energy?
It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.
The option that will help you safely cool foods is by putting cold foods away immediately after purchasing, Nestle a bowl of cold food in a slightly larger bowl of ice during a picnic, and Transferring cold foods directly from the refrigerator to the cooler when going out.
The right response is A, option a since all of the options will help you safely cool meals, with the exception of putting leftovers in a deep container after a meal to allow them to cool more slowly.
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When does the difference between two vectors equal to zero ?
Answer: Yes, two vectors of equal magnitude that are pointing in opposite directions will sum to zero
Explanation: Two vectors of unequal magnitude can never sum to zero. If they point along the same line, since their magnitudes are different, the sum will not be zero.
Which are the basic physical sciences?
Answer:The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.
Answer:
Chemistry, physics, astronomy and earth science.
Explanation:
The four main categories of physical sciences are chemistry, physics and earth science and astronomy. Life sciences deal with living organisms and behavioral sciences deals with the interactions between organisms in the natural world.
What is the role of friction when ; a boats engine stops
The water exerts a net drag force on the boat, and tends to make the boat move along with the average water flow, or stay put if the water isn't going anywhere. The water will heat up slightly as energy from the big motion ...
Go to the roller coaster simulation and click on the “launch” button. Pay attention to the pie chart as the roller coaster moves and fill in the blank. Be sure to keep this website open because there will be several questions related to it. The kinetic energy as the roller coaster goes downhill.
Answer:
increases
Explanation:
Answer:
increases
Explanation:
