Note: I'm assuming the data 77.3 is the mass of the crate.
Answer:
\(\mu_s =0.36\)
Explanation:
The coefficient of static friction, called \mu_s is the ratio between the force needed to start moving an object above a rough surface (Fr), and the normal force the surface exerts on the object (N).
\(\displaystyle \mu_s =\frac{Fr}{N}\)
The normal force is numerical equivalent to the weight of the body if no other external forces are acting.
\(N=m\cdot g\)
The mass of the crate is m=77.3 Kg, thus its weight and normal force is:
\(N=77.3\ kg\cdot 9.8\ m/s^2\)
\(N= 757.54\ Nw\)
Now we calculate the coefficient:
\(\displaystyle \mu_s =\frac{275\cancel{N}}{757.54\cancel{N}}\)
\(\boxed{\mu_s =0.36}\)
Answer:
0.36
Explanation:
In star wars, john williams used the __________ concept of romantic opera in which a character is assigned a short melody. so, famous characters like darth vader, princess leia, and han solo all have their own melody.
In Star Wars, John Williams used the Leitmotif concept of romantic opera in which a character is assigned a short melody.
It is used for famous characters like Darth Vader, Princess Leia, and Han Solo all have their melody.
Leitmotif is generally described as a recurring theme shown or appears over musical or literary composition.
Leitmotif is more common in operas and symphonic poems. It is attributed to a specific person, idea, or situation.
Hence, in this case, it is concluded that in the movie Star Wars, John Williams used the Leitmotif concept of romantic opera.
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Johnny is drinking a glass of orange juice when he is informed that orange juice is acidic. He begins to panic, thinking his blood will soon turn to acid. Why should he not be worried?.
Johnny needs not to be worried because blood contains buffering agents which resist changes in pH.
What is blood?Blood is defined as the fluid of the circulatory system that is made of various cells and plasma the travels through the body in veins and arteries. The cells found in the blood include the following:
White blood cells (monocytes, lymphocytes, neutrophils, eosinophils, basophils, and macrophages),Red blood cells (erythrocytes), and Platelets.At the normal healthy state of an individual, the pH of the blood is kept constant at 7.35 to 7.45. This is because, the buffering agents found in the blood such as carbonic acid and bicarbonate anion helps in the maintenance of the blood pH.
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Consider a cylindrical crew module with a diameter of 5 meters, a length of 15 meters, and a crew of 6 people. The module contains air that is at
standard sea-level atmospheric pressure and temperature. The sea level density of air at 20 degrees Celsius is 1.204 kg/m3.
What is the volume of the crew module? Provide your answer in m' with at least 2 decimal places.
Answer:
294.524 m^3
Explanation:
The volume of a cylinder is given by the formula ...
V = πr^2h
For a radius of 2.5 m and a length of 15 m, the volume is ...
V = π(2.5 m)^2(15 m) = 93.75π m^3 ≈ 294.524 m^3
The volume is about 294.52 cubic meters.
light of intensity so and polarized horizontally passes through three polarizes. the first and third are horizontal, but the second is oriented 0.62832 rad to the horizontal. in terms of so , what is the intensity of the light that passes through the set of polarizers?
The Light Intensity that passes through the set of polarizers is 9.99939871 W/m
It takes complicated mechanisms to control how light moves through media. As an electromagnetic wave, light interacts with the electric charge that permeates all matter. The oscillatory motion of electric charges along a single dimension can actually be significantly restricted by creating a solid substance.As a result, charges respond to electric fields in one direction—or more specifically, to their individual components in one direction—while not responding in the opposite direction.\(I=icos\alpha\)
I=10 cos 0.62832
=9.99939871 W/m
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Please help!!!!
A student reads that the Mid-Atlantic ridge is growing wider every year as the North American and Eurasian plates move apart. Why is the separation between the two plates of little concern?
a. the separation occurs slowly at the rate of only a few centimeters a year
b. the magnetic force acting between the two plates remains strong
c. the seafloor between the two plates continues to hold them together
d. a landmass bridges the gap that is created by the separation of the two plates
Answer:
I think its D.....
Determine the weight of a 2959.0-kg car that is moving at a speed of 21 m/s. Enter a
numerical answer.
weight=mass*gravity
w=2959.0*10
w=29590N
The weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons, here speed of the car is the redundant value that is not used to calculate the weight of the car.
What is gravity?It can be defined as the force by which a body attracts another body toward its center as the result of the gravitational pull of one body and another.
As given in the problem, we have to determine the weight of a 2959.0-kg car that is moving at a speed of 21 m / s .
The weight of the car = mass of the car × acceleration due to gravity
= 2959 × 9.8
= 28998.2 Newtons
Thus, the weight of a 2959.0-kg car that is moving at a speed of 21 m / s would be 28998.2 Newtons.
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You would like to confirm Netwon's second law by running an experiment. You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude?
Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
There is some other force present. This additional force is different for the two objects and accounts for the fact that the objects land at different times.
Newton's second law is not relevant in determining when an object will land on the ground.
One object must be heavier than the other and must therefore experience a greater gravitational acceleration.
Answer:
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
Explanation:
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
You decide to drop two different objects from a tall building and discover that one of the objects lands on the ground five seconds before the other object. What can you conclude? Newton's second law is not valid because each object should experience the same force of gravity and therefore should land at the same time.
Two magnets are arranged so that they pull together. Which conclusion can be reached? A.Two north poles are together. B. Two south poles are together. C. The poles of the magnets are touching. D. A north pole is near a south pole.
Answer:
Answer is D. a north pole is near a south pole
Explanation:
Hope this helps!! :D
The driver of a car slams on the brakes, causing the car to slow down at a rate of 24.0ft/s? as the car skids 253ft to a stop.
How long does the car take to stop?
What was the car's initial speed?
It takes approximately 4.59 seconds for the car to come to a stop. the car's initial speed was approximately 110.2 ft/s,
To determine the time it takes for the car to stop and the car's initial speed, we can use the kinematic equation:
v² = u² + 2as
where:
v is the final velocity (0 ft/s, since the car comes to a stop),
u is the initial velocity (unknown),
a is the acceleration (-24.0 ft/s², as the car slows down),
and s is the distance traveled (253 ft).
Plugging in the known values into the equation, we can solve for u:
0² = u² + 2(-24.0 ft/s²)(253 ft)
0 = u² - 48.0 ft/s² * 253 ft
48.0 ft/s² * 253 ft = u²
u² = 12144 ft²/s²
Taking the square root of both sides:
u = √12144 ft/s
u ≈ 110.2 ft/s
So, the car's initial speed was approximately 110.2 ft/s.
Now, to find the time it takes for the car to stop, we can use the equation:
v = u + at
0 = 110.2 ft/s + (-24.0 ft/s²) * t
24.0 ft/s² * t = 110.2 ft/s
t = 110.2 ft/s / 24.0 ft/s²
t ≈ 4.59 s
Therefore, it takes approximately 4.59 seconds for the car to come to a stop.
In summary, the car's initial speed was approximately 110.2 ft/s, and it took approximately 4.59 seconds for the car to come to a stop while skidding a distance of 253 ft.
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a pitcher throws a .015 kg baseball from rest to a final velocity of 45. what is the magnitude of the change in momentum of the baseball
Answer:
0.675 kg m/s
Explanation:
Momentum = mass x velocity
= 0.015 x 45 = 0.675 kg m/s
P.S. I'm not sure of this answer, so it might be a good idea to check this with some other sources.
Change in momentum = 0.675 kg m/s
What is momentum ?
Momentum is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity
change in momentum = final momentum - initial momentum
final momentum = m*v = 0.015 * 45 = 0.675 kg m/s
initial momentum = m* v = 0.015 * 0 = 0
change in momentum = 0.675 kg m/s
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Which functional group contributes negative charge.
Any functional group that contributes negative charge must have a lone pair of electrons.
What is a functional group?The term functional group refers to an atom, group of atoms or a bond that is responsible for the chemical reactivity of the homologous series. A homologous series is any family of compounds.
The question is incomplete. However, any functional group that contributes negative charge must have a lone pair of electrons like amines.
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A jet plane acceleration along a straight run way from rest to a speed of 140 m/s in 50 seconds when it took off. Calculate:
1- it’s change of velocity
2- it’s acceleration
Please help me it’s emergency
Answer:
Vf=140 m/s
Vi=0
t=50s
Explanation:
1. Acceleration is called change of velocity.
2. a=Vf-Vi/t
a=140-0/50
a=140/50
a=2.8m/s^2
When the pd-106 nucleus is struck with an alpha particle, a proton is produced along with a new element. What is this new element?.
Three 45 ohm lightbulbs and three 75 ohm lightbulbs are connected in series. (a) what is the total resistance of the circuit? (b) what is their resistance if all six are wired in parallel?
a) The total resistance of the circuit in which three 45 ohm lightbulbs and three 75 ohm light bulbs connected in series is 360 ohm.
b) The total resistance of the circuit if all six are wired in parallel is 28.57 ohm.
a) In order to find the series total resistance, we need to add all resistances,
Req = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ = 45 + 45 + 45 + 75 + 75 + 75 = 135+ 225 = 360 ohm
b) Now, since the resistances are in parallel, we need to use the expression below,
1/Req = 1/R₁ + 1/R₂ + 1/R₃ + 1/R₄ + 1/R₅ + 1/R₆
Putting in the values,
1/Req = 1/45 + 1/45 + 1/45 + 1/75 + 1/75 + 1/75
1/Req = 1/0.035
Req = 28.57 ohm
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A book with a mass of 5 kg is pushed off a table with the velocity of 2 m/s. What is its momentum?.
Momentum formula:
\(p=mv\)
momentum(measured in n*s) = mass(measured in kg) * velocity(measured in m/s)
__________________________________________________________
Given:
\(m=5kg\)
\(v=2m/s\)
\(p=?\)
__________________________________________________________
Finding momentum:
\(p=mv\)
\(p=5\times2\)
__________________________________________________________
Answer:
\(\fbox{p = 10 N*s}\)
Answer:p = 10 n*s
Explanation:
pleaseeee helpp quickkkk
A skateboarder starts at the top of a halfpipe ramp, skates through the middle, and up the other side.
Match the following to describe what is happening at each of the three points in the skater's movement.
Question 1 options:
Middle
End
Beginning
1.
Maximum kinetic energy
2.
Potential and kinetic energy equal
3.
Maximum potential energy
Answer:
Explanation:
1=3
A pendulum has a bob with a mass of 25.0kg and a length of 0.750m. It is pulled back a distance of 0.250m. What is the displacement of the pendulum when it has been swinging for 2.00s?
The displacement of the pendulum is 0.815 m.
Mass of the pendulum, m = 25 kg
Length of the pendulum, l = 0.75 m
Distance moved by the pendulum, x = 0.25 m
Therefore, acceleration of the pendulum,
a = -(g/l) x the negative sign implies the restoring force.
a = -(9.8/0.75) 0.25
a = -3.26 m/s²
Time period of the pendulum = 2 s
Angular frequency, ω = 2\(\pi\)/T
ω = 2 x 3.14/2
ω = 2 s⁻¹
Displacement,
x' = -(a/ω²)
x' = 3.26/4
x' = 0.815 m
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One molecule of calcium oxide, Cao, and one molecule of carbon dioxide, CO2, combine in a chemical reaction to form one
substance. Given that matter is neither created nor destroyed, which chemical formula is the product of this reaction? (1 point)
Ca2CO3
CaCO2
Ca203
0 CaCO3
Here, we are required to determine which chemical formula is the product of the reaction between CaO and C02 given that matter is neither created nor destroyed.
The chemical formula of the product of this reaction is ; CaCO3.
The law of conservation of mass is the basis for the balancing of equations of chemical reactions.
The law states that matter( which is the building block of mass) can neither be created nor destroyed.
Therefore, in a reaction where one molecule of calcium oxide, CaO, and one molecule of carbon dioxide, CO2, combine in a chemical reaction to form one substance;
The chemical formula of the product of this reaction is ; CaCO3.
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We are warmed by condensation because water molecules in the air that strike our bodies
A. form an insulating layer on our bodies
B. gain kinetic energy as they change state
C. transfer some of their kinetic energy to us
Condensation warms us because airborne water molecules that impact our bodies give up some of their kinetic energy to us.
What is kinetic energy?
Kinetic energy is the energy of motion. It is the energy that a moving item possesses.It is typically measured in joules and is equal to the work done to accelerate the object from its rest state to its current state. Kinetic energy can be found by multiplying the mass of an object by its velocity squared, divided by two. The kinetic energy of an object increases as its velocity increases.Kinetic energy exists in both linear and rotational forms. Linear kinetic energy is the energy of an object moving in a straight line, while rotational kinetic energy is the energy an object has due to its spinning or rotating motion.
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57. A red ball (m= 10 kg) is moving at 3 m/s. A green ball (m = 8 kg) is moving at 3.5 m/s. Which ball has more
energy and by how much (2)
Answer:
the green ball has 4J more energy
Explanation:
The kinetic energy is given by the formula
K = 0.5 m v^2
the kinetic energy of the red ball:
K(red) = 0.5*10*3^2= 45J
of the green ball:
K(green)=0.5*8*3.5^2 = 49J
therefore the green ball has more energy by 4 Joules
the relationship between force and acceleration verification of Newton second law of motion
Answer:
below
Explanation:
According to Newtons Second Law of Motion, also known as the Law of Force and Acceleration, a force upon an object causes it to accelerate according to the formula net force = mass x acceleration. So the acceleration of the object is directly proportional to the force and inversely proportional to the mass.
If you pull an object horizontally, what part of your force does work?
help
1 state five fact about the earth
2 list seven variety roles of satellites
3 state 3 criteria that make pluto different from other planets
4 full meaning of IAU
5 list the type of contact force
6 what is force
Answer:
4. INTERNATIONAL ASTRONOMICAL UNION
Answer:
6. force is the pull or push which changes or tends to change the (either rest or motion) of a body.
What device is like the reverse of an electric motor?
a.
Generator
c.
Steam engine
b.
Tesla coil
d.
Battery
Answer:
a. Generator
Explanation:
Answer:
A
Explanation:
A battery derives its energy chemically. D is not the answer.
C develops its energy by burning fuel and transferring the heat energy to make water into steam which is chemical/mechanical. Not C
B A Tesla Coil produces a very high voltage and a low current. Not B.
The answer left is A. It converts mechanical energy into electrical energy. It is the only device listed that does this.
What Factor(s) determine the strength of an electric field between two objects?
A. The type of charge on the objects.
B. The amount of charge on the objects.
C. The distance between the objects.
D. B and C
Answer:
D. B and C
Explanation:
from the formular
\(E = \frac{kQ}{ {r}^{2} } \)
Q: is magnitude or amount of charge.
r: is the separation distance.
how many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.02×10−21
The distance between the spheres is not provided in the question, so we cannot calculate the exact number of excess electrons on each sphere.
Please provide the distance between the spheres (r) so that we can proceed with the calculation.
To determine the number of excess electrons on each sphere, we can use Coulomb's law.
Coulomb's law states that the force of repulsion between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Given that the magnitude of the force of repulsion between the spheres is 4.02×10^−21, we can use this information to calculate the number of excess electrons on each sphere.
The equation for Coulomb's law is:
F = k * (q1 * q2) / r^2
where F is the force of repulsion,
k is the electrostatic constant, q1 and q2 are the charges on the spheres, and r is the distance between the spheres.
Since the charges on the spheres are the same (since they are both excess electrons), we can rewrite the equation as:
F = k * (q^2) / r^2
Rearranging the equation to solve for q,
we get:
q = sqrt((F * r^2) / k)
Plugging in the given values:
q = sqrt((4.02×10^−21 * r^2) / k)
The electrostatic constant k is approximately equal to 8.99 × 10^9 N m^2 / C^2.
The distance between the spheres is not provided in the question,
so we cannot calculate the exact number of excess electrons on each sphere.
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A trapeze artist weighs 8.00 x 102 N. The artist is momentarily held to one side of a swing by a partner so that both of the swing ropes are at an angle of 30.0o with the vertical. In such a condition of static equilibrium, what is the horizontal force being applied by the partner?
The horizontal force being applied by the partner is 692.8 N.
What is the horizontal force applied?
The horizontal force being applied by the partner is determined by applying Newton's second law of motion.
Mathematically, the Newton's second law of motion is given as;
F = ma
where;
m is the mass of the objecta is the acceleration of the objectThe total weight of the trapeze artist can be resolved into horizontal component and vertical component.
The formula for the horizontal component of the weight of the trapeze artist is given as;
Fx = F cosθ
Wx = W cosθ
where;
W is the weight of the artistθ is the angle of inclination of the ropeWx = ( 8 x 10² N ) x cos (30)
Wx = 692.8 N
Thus, the horizontal force applied by the partner is a function of the horizontal component of the weight of the trapeze artist.
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Where did the radiation come
You ride your bike for a distance of 46.2 km . You travel at a speed of 0.68 km/ minute. How many minutes does this take? Answer in(min)
what's the noun in "she is my favorite english teacher"
Answer:
i think it is teacher
Explanation:
because it is noun
Answer:
Teacher.
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