Answer:
2100 N
Explanation:
From the question,
Using the formula
F₁d₁ = F₂d₂..................... Equation 1
Where F₁ = Weight of the Boulder, d₁ = distance moved by the Boulder, F₂ = Force applied on the lever, d₂ = distance moved by the lever.
make F₁ the subject of the equation
F₁ = F₂d₂/d₁.................... Equation 2
Given: F₂ = 350 N, d₁ = 0.25 m, d₂ = 1.5 m
Substitute these values into equation 2
F₁ = 350(1.5)/0.25
F₁ = 2100 N
LSE
9. A car accelerates constantly from 3 m/s to 8 m/s in 10 s and then travel with
constant speed for another 7 s.
(a)
Sketch the speed-time graph.
(b)
Determine its acceleration for the first 10 s of the journey.
(c)
Calculate the total distance travelled by the car.
all about Henry Mosléy?
Answer:
henry moseley was an english physicist, whose contribution to the science of physics was the justification from physical laws of the previous chemical concept of the atomic number. one of his developments were of moseley's law in x-ray spectra.
Explanation:
Human resource professionals are reviewing the needs of a company that is
building a new factory. The company needs people who can weld electronic
elements together, test them, and package them securely. The HR
professionals conclude that four kinds of workers could complete this
process. Their work is the HR function of
A. employee retention
B. recruitment
C. selection
D. job design
Help Please!!!!!!!!!!!!!!!!!!
Like all planets, the planet Venus orbits the Sun in periodic motion and simultaneously spins about its axis. Just as on Earth, the time to make one complete orbit (i.e., the period of orbit) is what defines a year. And the time to make one complete revolution about its axis (i.e., the period of rotation) is what defines a day. The period of orbit for the Earth is 365.25 days and the period of rotation is 24 hours (1.00 day). But when these same values for Venus are expressed relative to Earth, it is found that Venus has a period of orbit of 225 days and a period of rotation of 243 days. So for Venus inhabitants, a day would last longer than a year! Determine the frequency of orbit and the frequency of rotation (in Hertz) on Venus. Ans: A marine weather station detects waves which are 9.28 meters long and 1.65 meters high and travel a distance of 50.0 meters in 21.8 seconds. Determine the speed and the frequency of these waves. Ans:
Answer:
a) F = 5.14 10⁻⁸ Hz, f = 4.76 10-8 Hz, b) v = 2.29 m / s, f = 42.5 Hz
Explanation:
a)This problem has two parts.
For the calculations relative to the planet Venus, we use that the period and the frequency are related
f = 1 / T
frequency of the orbit around the Sun
Let's reduce the period to the SI system
T = 225 days (24h / 1days) (3600 s / 1h) = 1.94 10⁷ s
F = 1 / 1.94 10⁷
F = 5.14 10⁻⁸ Hz
rotation frequency
T = 243 d = 2.1 107 s
f = 1 / T
f = 1 / 2.1 107
f = 4.76 10-8 Hz
b) give the data of some marine waves
the speed of the wave can be found with kinematics
v = x / t
v = 50.0 / 21.8
v = 2.29 m / s
If the wavelength is L = 9.28m
this distance is the distance between two consecutive ridges or valleys
λ / 2 = L
λ = 2L
λ = 2 9.28
λ = 18.56 m
the speed of the wave is
v = λ f
f = v /λ
f = 2.29 / 18.56
f = 42.5 Hz
Help please, It's for science :>
Answer:
he tail of the arrow moves a distance of 0.5 m as the arrow is shot. yare yare daze
Explanation:
A standing wave has points of constructive interference called _________ and points of destructive interference called ___________.
A. troughs, crests
B. nodes, antinodes
C. antinodes, nodes
D. crests, troughs
Answer:
The answer is nodes because nodes stay in a fixed position.
Explanation:
hope it help
srry if wrong
A standing wave has points of constructive interference called antinodes and points of destructive interference called nodes
What are constructive and destructive interferenceThis position, where the resulting wave is larger than either of the two original, is called constructive interference.
When the first wave is leading, the second wave is down and the addition of the two is zero. This is called destructive interference.
A standing wave occurs when two waves with the same properties moving in the opposite direction, in the same media, interfere with one another.
Nodes are points where the waves interact destructively, causing an appearance of the wave standing still. The opposite of nodes is antinodes where they are points of maximum displacement due to constructive destruction.
Thus the standing wave has points of constructive interference called antinodes and points of destructive interference called nodes
To know more about constructive and destructive interference, follow
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What is the velocity of a bus that travels 250 km in 2 hrs?
Answer:
125
Explanation:
you divide km/hrs to find your velocity.
V=km/hr
V= 250km/2hr
V=125
hope this helps !:)
Part D The surface area of a material is a factor that affects heat conductivity. Does heat flow faster through a large surface area or through a small surface area? Why? (Hint: Think about the number of particles available to bump into one another)
Answer:
That guy is right i got a 100 as my score :)
Explanation:
please help me
A football, that has a mass of 0.43 kg, is kicked across a field at an acceleration of 0.92 m/s². What is the force used on the football?
Answer:
0.3956
Explanation:
Newton's 2nd law of motion says that Force = Mass*Acceleration (f=ma) so to find the force used on the football you multiply it's mass by its acceleration.
0.43*0.92 = 0.3956.
0.4 if you round
A copper wire loop has a circular shape, with a radius a (see below). The loop is put perpendicularly to the uniform magnetic field, which changes with time according to the next function (α and β are both constant and positive): B = α + βt. Is there an electromotive force induced in the loop? If yes, calculate its value and find its direction. If not, explain why there is no electromotive force induced in the loop.
Answer:
fem = -A β
Explanation:
Faraday's law gives the induced electromotive source (emf)
fem = [tex]- \ \frac{d \phi_B }{dt}[/tex]
the magnetic flux is
[tex]\phi_B[/tex] = B. A = B A cos θ
the bold are vectros. In this case the normal to the ring is parallel to the magnetic field so the angle is zero cos 0 = 1, also the area of the ring is constant
fem = -A [tex]\frac{dB}{dt}[/tex]
we carry out the derivative of the function B = α + β t
fem = -A β
so we see that there is an electromotive force in the ring.
.
A .63 kg ball is moving at 4.3m/s. What is the momentum of the ball?
Answer:
Given Mas (m) =63kg
velocity (v) =4.3m/s
momentum (p) =?
p=mv
63kgx4.3m/s
270.9kg.m/s
the momentum =270.9kg.m /s
If a ball of mass 0.63 kilograms is moving at 4.3 meters/seconds, then the momentum of the ball would be 2.709-kilogram meters/second.
What is momentum?It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle.
Momentum = mass of the object × velocity of the object
As given in the problem we have to calculate the momentum of the ball if it has a mass of 0.63 kilograms and moving with a speed of 4.3 meters/seconds,
The momentum of the ball = 0.63× 4.3
=2.709 kilogram meters/second
Thus, the momentum of the ball comes out to be 2.709-kilogram meters/second.
To learn more about momentum from here, refer to the link;
brainly.com/question/17662202
#SPJ2
PLEASE HELP!!!
What reasons could possible make honeysuckle considered as invasive and not endangered?
Answer:
it grows fast, spreads faster and kills off smaller native plants
Explanation:
honeysuckle spreads very quickly and blooms multiple times a year, spreading seeds and growing in more spots. everytime it does so, it cuts off other smaller native plants from the sunshine and kills them off
Which phrases apply to the formation of the Grand Canyon?
Choose all that apply.
medium scale
medium scale
long-term
long-term
small scale
small scale
short-term
short-term
large scale
large scale
Answer:
Large scale
Explanation:
short term
Rank the ten objects from loudest to softest.
Which argument best explains the charge of an atomic nucleus? *
1 point
An atomic nucleus is positively charged because it is composed of neutrons.
An atomic nucleus is positively charged because it is composed of protons.
An atomic nucleus is negatively charged because it is composed of electrons.
An atomic nucleus is negatively charged because it is composed of neutrons.
Answer:
An atomic nucleus is positively charged because it is composed of protons
Explanation:
Protons carry positive charge and nucleus only contain protons
What are sport skills sometimes referred to as?
a skill-related fitness
b. performance skills
c. health-related fitness
d. physical fitness
How does the us constitution protect democratic ideals?
Answer: These ideas, that all men are created equal and that government is based on the consent of the governed, became the foundation for the US political ideal of popular sovereignty: that the government exists to serve the people, who elect representatives to express their will.
Explanation: Hope this helped! <3
1. The difference between a sensor and a transducer is that in a transducer: A. no calibration is required for it to be used B. the measured variable can be converted to an alternative form C. electrical power is always needed D. no electrical power is required at any time 2. A _________ is a safeguard mechanism for coordinating the activities of two or more devices and preventing one device from interfering with the operation of others. A. interrupt B. feedforward control C. adaptive control D. interlock 3. An actuator can also be classified as a transducer depending on whether the physical output has a relationship with the input signal. A. true B. false 4. A common design issue to consider when selecting a sensor for automation is: A. whether it is PNP or NPN B. power required for operation C. robustness D. all of the above. 11. An optical encoder is used to sense speed and position of a rotating shaft in servomotor driven worktable for feedback control. This type of control system uses an OPEN LOOP control system. A. true B. false 4. Which of the following is a good reason for automating a plant
Answer:
Explanation:
1
The difference between a sensor and a transducer is that in a transducer no electrical power is required at any time
2.
An interlock is a safeguard mechanism for coordinating the activities of two or more devices and preventing one device from interfering with the operation of others.
3
An actuator can also be classified as a transducer depending on whether the physical output has a relationship with the input signal......True
4
AP Physics Question
An amusement park ride consists of a large vertical wheel of radius that rotates counterclockwise on a horizontal
axis through its center, as shown above. The cars on the wheel move at a constant speed . Points and
represent the position of a car at the highest and lowest point of the ride, respectively. A person of weight sits
upright on a seat in one of the cars. As the seat passes point , the seat exerts a normal force with magnitude
on the person. While passing point , the person releases a small rock of mass , which falls to the ground
without hitting anything.
2. Which of the following best describes the passenger’s linear and angular velocity while passing point ?
A
Linear Velocity Angular Velocity
Constant Changing
B
Linear Velocity Angular Velocity
Constant Constant
C
Linear Velocity Angular Velocity
Changing Changing
D
Linear Velocity Angular Velocity
Changing Constant
The linear velocity is changing and the angular velocity is Constant best describes the passenger’s linear and angular velocity while passing a point.
What is the definition of Angular velocity?The rate of change of angular displacement is defined as angular speed, and it is stated as follows:
ω = θ t
Where,
θ is the angle of rotation,
t is the time
ω is the angular velocity
The linear velocity is given as the product of angular velocity and radius.
v=ωr
In the circular motion, the linear velocity is changing. Because the radius is changing.While the angular velocity is constant.Because it is an independent quantity.
Hence the Linear velocity is changing and the angular velocity is Constant best describing the passenger’s linear and angular velocity while passing a point.
To learn more about the angular velocity refer to the link;
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What is your velocity if you run 100 meters away from your house and it takes you 5 seconds to run that far?
Answer:
velocity = displacement / time taken
velocity = 100/5
velocity = 20m/s
A hockey puck slides across the ice with an initial velocity of 7.3 m/s .It has a decleration of 1.1 m/s and is traveling towards the goal 5.0 m away .How much time does the goalie have to stop the puck?
Answer:
t = 6.63 s
Explanation:
Given that,
Initial velocity of the puck, u = 7.3 m/s
Deacceleration of the puck, a = -1.1 m/s²
Distance traveled, d = 5 m
We need to find the time the goalie have to stop the puck. Using equation of motion.
v = u +at
v = 0 (stops)
So,
[tex]u=-at\\\\t=\dfrac{u}{-a}\\\\t=\dfrac{7.3}{-(-1.1)}\\\\t=6.63\ s[/tex]
So, the required time is 6.63 seconds.
what is the average of this set of data 5, 18, 8, 4, 10
answer:
9
Explanation:
add them all together then divide
Metals allow electrons to flow through and complete the circuit. Therefore they are called?
Answer:
the answer would be conductors
What is the mass of an asteroid with a speed of 200 m/s and a momentum of 2,000 kg m/s?
A. 2200 kg
B. 10 kg
C. 400,000 kg
D. 1,800 kg
Answer:
jhnnmhunn vgu fhbiy f
Explanation:
hjbgyvfvubhjgvg
Answer:10 kg
Explanation: momentum p = mv and m = p/v
Mass m = 2000 kgm/ s / 200 m/s
Where inside an atom are protons and neutrons located?
Answer:
They are located in the core
Explanation:
Answer:
Inside the nucleus.
Explanation:
There are three subatomic particles. Protons have a charge of 1+, a mass of 1amu, and are found in the nucleus. Neutrons do not have a charge, have a mass of 1amu, and are found in the nucleus. Electrons have a charge of 1-, have negligible mass, and can be found orbiting the nucleus in the electron cloud.
does anybody know what i can put for these 3 questions?
A sample of a low-density gas is initially at room temperature and has pressure p. The gas is warmed at constant volume until the pressure is 2p. Compared to the initial Celsius temperature of the gas, the final Celsius temperature is
Answer:
Compared to the initial Celsius temperature of the gas, the final Celsius temperature is greater by a factor of more than 2.
Explanation:
Gay-Lussac's law states that the pressure of a fixed volume of a gas is directly proportional to its temperature. In other words, if the temperature increases, the pressure will increase and if the temperature decreases, the pressure will decrease.
In summary, Gay-Lussac's law is a law that says that when the amount of gas and volume are kept constant, the quotient that exists between the pressure and the temperature will always have the same value:
[tex]\frac{P}{T}=k[/tex]
Being an initial state 1 and a final state 2, it is true:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= pT1= tP2= 2pT2= ?Replacing:
[tex]\frac{p}{t} =\frac{2p}{T2}[/tex]
Solving:
[tex]T2=2p*\frac{t}{p}[/tex]
T2= 2*t
Compared to the initial Celsius temperature of the gas, the final Celsius temperature is greater by a factor of more than 2.
You place a piece of bread in a toaster. A minute later, the toast pops up. What evidence tells you an increase in temperature caused a chemical change?
if your not able to reverse it that means it is a chemical change and with toast you cant reverse the color if the color has changed that most likely means it is a chemical change.
help please ill give brainly and heart !!!!
what type of system hurricanes need to form?
A ) High pressure
B ) Jet stream
C ) Low pressure
D ) Cool Dry Air
Answer:
The answer is A ) High pressure
I hope this helps you :)
please let me know if I am wrong