Answer:
2.27 m/s²
Explanation:
Recall that one of the equations of motion can be expressed as
v² = u² + 2as
where
v = final velocity = takeoff speed = 33m/s
u = initial velocity = rest = 0 m/s
a = acceleration ( we are asked to find this)
s = distance traveled = length of takeoff run = 240m
substituting the known values into the equation above,
v² = u² + 2as
33² = 0² + 2a(240)
1089= 480a
a = 1089/480
a = 2.27 m/s²
ANSWER
2.27 m/s^2
EXPLANATION
We can use the general relationship from kinematics:
vf^2 = vi^2 + 2as
where:
s = distance;
a = acceleration;
vi = 0m/s is the initial velocity;
vf=33ms is the final velocity.
So:
33^2 = 0^2 + 2 ⋅ a ⋅ 240
a= 1089/480
= 2.27m/s^2
A physical pendulum in the form of a planar object moves in simple harmonic motion with a frequency f. The pendulum has a mass m, and the pivot is located a distance d from the center of mass. Determine the moment of inertia of the pendulum about the pivot point
Answer:
[tex] I = \frac{mgd}{4\pi^{2}f^{2}} [/tex]
Explanation:
The moment of inertia (I) of the pendulum can be found using the following equation:
[tex] T = 2\pi\sqrt{\frac{I}{mgd}} [/tex]
Where:
T: is the period of the pendulum
m: is the pendulum's mass
g: is the gravity
d: is the distance of the pivot from the center of mass
Solving the above equation for I:
[tex] I = \frac{T^{2}*mgd}{(2\pi)^{2}} [/tex] (1)
We have that the pendulum moves in simple harmonic motion with a frequency f, and this f is equal to:
[tex] f = \frac{1}{T} \rightarrow T = \frac{1}{f} [/tex]
By entering T into equation (1) we have:
[tex] I = \frac{T^{2}*mgd}{(2\pi)^{2}} [/tex]
[tex] I = \frac{(1/f)^{2}*mgd}{(2\pi)^{2}} [/tex]
[tex] I = \frac{mgd}{4\pi^{2}f^{2}} [/tex]
Therefore, the moment of inertia of the pendulum about the pivot point is [tex] I = \frac{mgd}{4\pi^{2}f^{2}} [/tex].
I hope it helps you!
demic
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Question 6
lemic
A swimming pool appears to be 1.0m deep when viewed vertically from above. If the water in the pool has a refractive index of 1.33.
calculate the real depth of the swimming pool.
emic
Choose one
o
1.00m
ACADEMIC
O
1.83m
All News
IN
2.33.71
0.33m
Back
Leave blank
Nent
Answer:
1.33
Explanation:
Apparent Depth = 1.0m
Real Depth = x
Refractive Index = 1.33
n = r.d/a.d
1.33 = x/1
x = 1.33 x 1
1.33
2. It is easier to drag a mat when nobody is sitting on
it, and difficult when a person is sitting on it. Give
reason.
Explanation:
because of the weight of the person sitting on it ...also frictional force increases
When a wave strikes a new medium, three things can happen: reflection, transmission, and absorption. Consider an echo. Do you think reflection is an important process when sound waves produce an echo?
Answer:
YES
Explanation:
An echo may be defined as a sound which is repeated because of the sound waves that are produced are reflected back after striking a surface. Sound waves can smoothly bounce off the hard objects in the same manner as a rubber ball bounces back the ground.
When a sound wave strikes a hard surface, the sound waves gets reflected back and bounces back to the observer and produces an echo. If the sound waves strikes a soft surface it absorbs the sound.
Although the direction of a sound changes but the echo sounds in the same way as the original sound.
4. Which of the following is equivalent to 800 cm?
a) 80000 nm
b) 8000 mm
c) 8.0x10^7 um
d) 8.0x10^5 km
e) 80 m
Answer:
Explanation:
1 cm =10mm so 800cm is equal to 8000mm.so b is the correct answer
A straight stream of protons passes a given point in space at a rate of 2.5 x 109 protons/s. What magnetic field do they produce 1.5 m from the beam
Answer:
B = 5.3x10⁻¹⁷ T
Explanation:
The magnetic field can be calculated as follows:
[tex]B = \frac{\mu_{0}I}{2\pi R}[/tex]
Where:
μ₀: is the magnetic permeability = 4πₓ10⁻⁷ H/m
I: is the current
R: is the distance between the magnetic field and the beam = 1.5 m
The current is:
[tex] I = 2.5 \cdot 10^{9} p/s*1.6 \cdot 10^{-19} C/p = 4.0 \cdot 10^{-10} A [/tex]
Hence, the magnetic field is:
[tex]B = \frac{\mu_{0}I}{2\pi R} = \frac{4\pi \cdot 10^{-7} H/m*4.0 \cdot 10^{-10} A}{2\pi*1.5 m} = 5.3 \cdot 10^{-17} T[/tex]
Therefore, the magnetic field is 5.3x10⁻¹⁷ T.
I hope it helps you!
The magnetic field will be "[tex]5.3\times 10^{-17} \ T[/tex]".
Magnetic field:According to the question,
Magnetic permeability, [tex]\mu_0 = 4 \pi\times 10^{-7} \ H/m[/tex]
Distance between magnetic field and beam, R = 1.5 m
The current (I) will be:
= [tex]2.5\times 10^9\times 1.6\times 10^{-19}[/tex]
= [tex]4.0\times 10^{-10} \ A[/tex]
hence,
The magnetic field (B) be:
= [tex]\frac{\mu_0 I}{2 \pi R}[/tex]
By substituting the values,
= [tex]\frac{4 \pi\times 10^{-7}\times 4.0\times 10^{-10}}{2 \pi\times 1.5}[/tex]
= [tex]5.3\times 10^{-17} \ T[/tex]
Thus the response above is appropriate.
Learn more about magnetic field here:
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Sebuah vektor gaya sebesar 40 N membentuk sudut 30° terhadap sumbu x positif. Komponen-komponen vektor tersebut terhadap sumbu x dan sumbu y adalah … N (Sin 30°= 1/2 √3 ; Cos 30°= 1/2) *
Answer:
Explanation:
Given that the force 40N F acting on the Cartesian x and y coordinates and forming an angle of 30 ° to the positive x-axis, the vector of the force component about the horizontal and vertical axes will be expressed as shown;
For the component force x;
Fx = Fcostheta
You know that F = 40N and theta = 30 °
Fx = 40cos30 °
Fx = 40 * √3 / 2
Fx = 40√3 / 2
Fx = 20√3 N
For the component force y;
Fy = Fsintheta
You know that F = 40N and theta = 30 °
Fy = 40sin30 °
Fy = 40 * 1/2
Fy = 20 N
Therefore, the vector components with respect to the x-axis and the y-axis are 20√3 N and 20N, respectively.
Use Lenz's law to explore what happens when an electromagnet is activated a short distance from a wire loop. Note, an electromagnet is a solenoid with a magnetic material inside its core. In this case, the magnetic material is iron, whose magnetic polarization amplifies the external magnetic field produced by the solenoid. You will need to use the right-hand rule to find the direction of the induced current.
Answer:
By Lenz's law, for, coils, if he North pole is activated on the electromagnet, the pole on the side of the coil closest to the electromagnet will be a North pole and the flow of the current will be counter clockwise
Explanation:
Lenz's law states that where a changing magnetic field induces an electric current in a solenoid, the magnetic field that is produced by the coil opposes the initial activation of the electromagnet in the solenoid
By Flamings right hand rule, we have;
When the thumb points in the direction of motion of the conductor relative to the fieldThe first finger points in the direction of the magnetic fieldThe second finger points in the direction of the induced emfTherefore, by Lenz's law, for, coils, if he North pole is activated on the electromagnet, the pole on the side of the coil closest to the electromagnet will be a North pole and the flow of the current will be counter clockwise.
You have 30 L of a liquid. How many gallons is this? (Note: 1 gal/3.79 L)
1. What are the ways that scientists answer questions and
solve problems?
a. physical science
b. physics
C. observations
d. scientific methods
Answer:
C. observations
Explanation:
a scientist have to observe somethng to find the answers or solve problems
How earth's magnetic field is taken as uniform magnetic field ?
Answer:
It is in contact with two vertical rails which are joined at the top. The rails are without friction and resistance. There is a horizontal uniform magnetic field of magnitude B perpendicular to the plane of the ring and the rails.
Explanation:
Not sure if this is correct but pls give thanks anyway!
While Johın is traveling along a straight inter-
state highway, he notices that the mile marker
reads 257 km. John travels until he reaches
the 133 km marker and then retraces his path
to the 173 kmn marker.
What is.John's resultant displacement from
the 257 km märker?
Answer in units of km.
How far has he traveled?
Answer in units of km.
Answer:
Hey there!
He starts from km 257.
Then he travels to km 133.
Finally, he travels to km 173.
His displacement is 257-173, or 84 km.
He traveled 164 km. (Note that distance traveled and displacement are not the same thing.)
Let me know if this helps :)
John's resultant displacement from the 257 km märker would be 84 kilometers .
He traveled a distance of 164 kilometers on the highway.
What is displacement?An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard.
As given in the problem, Johın is traveling along a straight inter-state highway, he notices that the mile marker reads 257 km. John travels until he reaches the 133 km marker and then retraces his path to the 173 km marker.
The total displacement of the John = 257 - 173
= 84 kilometers
the total distance traveled by John = (257-133) + (173-133)
= 164 kilometes
Thus, John's resultant displacement from the 257 km märker would be 84 kilometers.
Learn more about displacement here,
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A 5.0 kg bike moving 10 m/s comes to a complete stop in 2 seconds. What is the average force of the brakes on the bike?
Answer:
25 N
Explanation:
Force : This is defined as the product of mass and acceleration. The unit of force is Newton or kgm/s².
From the question,
F = ma......................... Equation 1
Where F = Force of the brake, m = mass of the break, a = acceleration.
But,
a = v/t.................. Equation 2
where v = velocity, t = time.
Substitute equation 2 into equation equation 1
F = m(v/t)................ Equation 3
Given: m = 5.0 kg, v = 10 m/s, t = 2 seconds
F = 5(10/2)
F = 25 N.
Hence the average force of the brakes on the bike is 25 N
Answer:
The average force of the brakes on the bike is 25.0 N
Explanation:
The parameters given in the question are,
Mass, m = 5.0kg
Initial velocity, u = 10 m/s
Time, t = 2 sec
Since the bike came to a complete stop, then
Final velocity, v = 0 m/s
To determine the average force of the brakes on the bike; From Newton's second law of motion, Force is given as
F = ma
Where F is the force in N (Newtons)
m is the mass in kg
and a is acceleration in m/s²
Hence, we will first determine the acceleration.
From one of the equations of kinematics for linear motion,
[tex]v = u + at[/tex]
Then, [tex]a = \frac{v - u}{t\\}[/tex]
Putting the given parameters into the above equation, we get
[tex]a = \frac{0 - 10}{2}[/tex]
[tex]a = \frac{-10}{2}\\ a = - 5[/tex]m/s²
The negative sign indicates deceleration since the bike came to a stop,
Hence, [tex]a = 5[/tex] m/s²
From,
F = ma
F = 5.0 × 5
F = 25.0 N
What is the density of an object with a mass of 24 g and a volume of 225 cm3?
Answer:24/225
Explanation:density =mass/volume
Consider the cooling curve above. The substance is changing state from a gas to a liquid to a solid. As the temperature changes we also know that
Answer:
The substance is changing state from a gas to a liquid to a solid. As the temperature changes we also know that A
Explanation:
Raul started out on his bike thirty meters to the south of my position. Five
seconds later, he was twenty meters to the north. How fast is Raul biking. Write
an equation to find his displacement, x, from the time, t. If he keeps going at the
same rate, where will he be one minute (sixty seconds from) when he started?
Answer:
Let's define the North as the positive y-axis.
At t = 0s (t is the variable of time) we know that Raul is 30m at the South, so in our system, the position of Raul at t = 0s is:
p(0s) = -30m
After 5 seconds, at the time t = 5s, we know that the position of Raul is 20m at the North, so now the position is:
p(5s) = 20m.
a) First, speed is calculated as distance over time, or:
S = ( p(5s) - p(0s))/5s = (20m - (-30m))/5s = 50m/5s = 10m/s.
b) The displacement is defined as the difference between the final position and the initial position:
Displacement = p(5s) - p(0s) = 20m - (-30m) = 50m.
Now, knowing the speed is 10m/s, we can write the movement equation as:
p(t) = 10m/s*t + p(0s) = 10m/s*t - 30m
So the displacement at a time t is:
D = p(t) - p0s = 10m/s*t - 30m - (-30m) = 10m/s*t
c) the position one minute after he started will be:
p(1min)
But we have our equation in seconds, so we write 1min = 60s
p(60s) = 10m/s*60s - 30m = 600m - 30m = 570m
Hi ) how to do this??
Answer:
X = 12N
Explanation:
Anticlockwise moment = Clockwise moment
Taking the moment at the pivot,
Anticlockwise moment = X×2.0m
Clockwise moment = (2.0N × 4.0m) + (4.0N × 4.0m)
Hence, 2X = (8 + 16)
2X = 24
X = 12N.
I HOPE IT'S OK.
The mass of a body on the surface of the earth is 12kg. If acceleration due to gravity on
moon is 1/6 of acceleration due to gravity on earth, then its mass on moon will be:
a)2kg
b)12kg
c)72kg
d)zero
(a)
Explain, in terms of the momentum of molecules, how the gas in the balloon exerts
a pressure.
Explanation: The molecules are continually colliding with each other and with the walls of the container. When a molecule collides with the wall, they exert small force on the wall The pressure exerted by the gas is due to the sum of all these collision forces. The more particles that hit the walls, the higher the pressure.
hope it helps
An object has a mass of 5 kg and a velocity of 20 m/s. What is the momentum of the object?(1 point)
25 kg⋅m/s
4 kg⋅m/s
100 kg⋅m/s
0.25 kg⋅m/s
Answer:
option C is correct
Explanation:
given mass=5 kg
velocity=20 m/s
momentum,P=m v
p=5*20=100 kg m/s
The momentum of the object is 100kg.m/s
HOW TO CALCULATE MOMENTUM:
The momentum of a substance can be calculated by multiplying the mass of that substance by its average speed or velocity. That is;Momentum (p) = mass (m) × velocity (v)
According to this question, an object is said to have a mass of 5 kg and a velocity of 20 m/s. Hence, the momentum can be calculated thus:p = 20m/s × 5kg
p = 100 kg.m/s
Therefore, the momentum of the object is 100kg.m/s.Learn more: https://brainly.com/question/20644069?referrer=searchResults
scott travels north 5 miles, then goes west 3 miles, and then goes south for 2 miles.
what is the distance he went?
10 miles
8 miles
7 miles
6 miles
""When we were discussing thermodynamics the other day, Dave didn't say anything. That must mean he doesn't know anything about the topic." What would be the most useful question to debunk this claim?"
Answer
the most useful question to debunk this claim is
Could there be another reason why Dave remained quiet?
Explanation:
Because its possible Dave could have known something but he choose to be quite because of another reason, as thus will debunk that he knows nothing about the topic
who is the current electric minister of Nepal?
i think "Barsaman Pun"
Explanation:
BARSAMAN PUN IS THE CURRENT ELECTRIC MINISTER OF NEPAL.
HOPE IT HELP.....❤❤☺1
A metre rule is used to measure a length
Which reading is shown to the nearest millimetre?
A 0.7 m
B
0.76 m
с
0.761 m
D
0.7614 m
Answer:
the answer is 0.7
Explanation:
because in this this case he asked nearest millimeter so the anwer can be qualified as 0.7 you can covert this into cos tita
A 0.7 m
What is a Metre rule used to measure?A meter ruler is a gadget or a sort of ruler that is used to measure the length and distance of various objects.
A meter rule has a length of one meter, which is equal to one hundred centimeters, as the name suggests.
According to the questions,
On a metric ruler, each individual line represents a millimeter (mm). The numbers on the ruler represent centimeters (cm). There are 10 millimeters for each centimeter. To read a metric ruler, each individual line represents .
As 0.7m = 70cm =700mm
Meter ruler can measure up to 100 cm. As the meter ruler is of 1m.
A metre ruler has a length of one metre, which is equal to one hundred centimetres, as the name suggests. A metre rule, on the other hand, is divided into smaller units called millimetres, with each centimetre divided into ten millimetres.
A metre rule, on the other hand, is divided into smaller units called millimetres, with each centimetre divided into ten millimetres.
As a result, up to one millimetre, a metre rule can be used to measure the shortest length.
A metre rule can be used for more than just measuring distances; it can also be used to draw straight lines and cut blades.
Therefore,
0.7m reading is shown to the nearest millimeter.
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a student wishes to find the volume of a piece of wood of irregular shape. her experiment requires the use of a small brass object of mass 200g. a] calculate the volume of the brass object. the density of brass is 8.4g/cubic cm.
Answer:
Volume, [tex]V=23.8\ cm^3[/tex]
Explanation:
It is given that,
Mass of small object of brass, m = 200 g
The density of brass is 8.4 g/cm³
We need to find the volume of the brass object. Density is equal to mass of an object per unit its volume.
So,
[tex]d=\dfrac{m}{V}[/tex]
V is the volume of the brass object
[tex]V=\dfrac{m}{d}\\\\V=\dfrac{200\ g}{8.4\ g/cm^3}\\\\V=23.8\ cm^3[/tex]
So, the volume of the brass object is [tex]23.8\ cm^3[/tex].
The volume of the brass object is 23.81 cm³.
Density is the ratio of the mass of a body and its volume. The S.I unit is kg/m³
To calculate the volume of the brass, we make use of the formula below
D = m/V................. Equation 1
Where D = density of the brass object, m = mass of the brass object, V = volume of the brass object.
make V the subject of equation 1
V = m/D.............. Equation 2
From the question,
Given: m = 200 g, D = 8.4 g/cm³
Substitute these values into equation 2
V = 200/8.4
V = 23.81 cm³
Hence, The volume of the brass object is 23.81 cm³
Learn more about density here: https://brainly.com/question/17780219
Both a 3 kg book and 5 kg bowling ball are sitting still on the floor. What is true about the kinetic energy of the objects? Explain.
Answer:
The kinetic energy for both objects is the same.
Explanation:
While in other cases the kinetic energies of two objects that have different masses might be different depending on their velocities, in this case both the 3 kg book and 5 kg bowling ball have the same kinetic energy.
This is because kinetic energy is calculated using the formula: K = 1/2 * m * v^2, where m represents the mass and v represents the velocity of the object.
Since the book and the bowling ball are sitting still on the floor, their velocities are zero. Hence, when we plug in 0 for velocity into the equation for kinetic energy, we will get that the kinetic energy is 0 for the book and the bowling ball.
Hope this helps!
Two cars are travelling in the same direction on a road. The blue car is travelling at 50 m/s in front of the red car, which is travelling at 75 m/s. What is their relative speed? *
Explanation:
The speed of the red car, relative to the blue car, is:
v = 75 m/s − 50 m/s
v = 25 m/s
What is speed in a particular direction?
acceleration
vector
speed
velocity
Answer:
VelocityExplanation:
THE SPEED OF AN OBJECT IN A PARTICULAR DIRECTION IS THE OBJECT'S VELOCITY.
[tex]hope \: this \: helps[/tex]
Answer:
acceleration
Explanation:
What is the slope of the line plotted below? (-2,-1) (4,2) A. 1 B. 2 C. -0.5 D. 0.5
Answer: D. 0.5
Explanation:
The slope formula is y2-y1/x2-x1.
2-(-1)/4-(-2) = 2+1/4+2
2+1/4+2 = 3/6 = 1/2
1/2 = 0.5
The slope is 1/2, or 0.5.
a cannonball is fired with a speed of 76 m/s from the top of a cliff. It strikes the plane below with a speed of 89 m/s. if we neglect air friction, how high is the cliff
Answer:
we use the formula,
[tex]v {}^{2} = u {}^{2} + 2gh[/tex]
[tex]89 {}^{2} = 76 {}^{2} + 2(10)h[/tex]
[tex]h = (89 {}^{2} - 76 {}^{2} ) \div 20[/tex]
h= 107 m