Answers
Answer:
In a third class lever, the effort is located between the load and the fulcrum. If the fulcrum is closer to the load, then less effort is needed to move the load. If the fulcrum is closer to the effort, then the load will move a greater distance. ... These levers are useful for making precise movements.
Related Questions
If the tension in the string is equal to 2 W when the stone is at its lowest point, then the tension when the stone is at the highest point will be
Answers
This question involves the concept of tension, centripetal force, centrifugal force, and weight.
The tension of the stone at the highest point is "0 N".
The centrifugal force always acts away from the circle. The tension always acts toward the support that is the center of the circle in this case. When the stone is at its lowest point, the centrifugal force, and the weight of the stone, both act downward. But the tension is pointing in the upward direction. Hence, the equilibrium equation will be:
[tex]Tension = Weight\ + \ Cenrifugal\ Force\\T = W + F_c\\T = 2\ W\ (given)\\2\ W = W+F_c\\F_c = 2\ W - W\\F_c = W[/tex]
Now, we consider the stone at the top position. Here, the centrifugal force will act in the upward direction (away from the center of the circle), while the weight and tension will be acting in the downward direction. Thus, the equilibrium equation, in this case, will be:
[tex]F_c = W+T\\T=F_c-W\\T = W-W\\[/tex]
T = 0 N
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The attached picture shows the free body diagram of the stone at different locations.
A rod is heated at the rate of 30 watts at the middle point and is insulated at its two ends. The two half sections are cooled by convection by an ambient fluid at 20 degree Celsius with a heat transfer coefficient of 30 W/m^2 C. The diameter of the rod is 0.5 cm, its length is 18 cm and its thermal conductivity is 206 W/mC. Determine the temperature in the middle of the rod and at the insulated ends. Please describe your strategy of solving this problem.
Answers
thanks for the points
Explanation:
sinat
Accelerationa
2 2.84
7 34
TABLE
in Elination
t2 t3 T2 2
1=0.04
2.29 1.25 1.28 1.271.61
2 460 = 0.00 4.59 1.16 1.081.12 1-25
3 so = 0.12 6.89 0.88
097 0.53
4. = 0.16 9.210.8
9.21 0.850.796. 82/0.67
(So
0.72 0.77 0.75 l 0-56/
0.28
49. al
27. 49
13 11%.
41. 2L
= 0.2 11.54
Answers
Answer:
so you have a question
Explanation:
either way,you have a nice day
Does time stand still in space
Answers
Answer:
[tex]\underline{\textsf{\textbf{Answer -}}}[/tex]
No & Yes - the case depends actually.
You can't make the velocity zero and expect to stay in space. you will need to constantly fire the engine to hold youself in position (this is possible, until you run out of fuel).
Yes, it is possible to fire the engine and lift off earth into space, and then fire in the opposite direction to earths movement until you are still, relative to the sun. But if you now turn the engine off, the suns gravity will pull you down and directly into the sun.
its the earths forward motion that prevents it falling into the sun
Answer:
No & Yes - the case depends actually.
You can't make the velocity zero and expect to stay in space. you will need to constantly fire the engine to hold youself in position (this is possible, until you run out of fuel).
Yes, it is possible to fire the engine and lift off earth into space, and then fire in the opposite direction to earths movement until you are still, relative to the sun. But if you now turn the engine off, the suns gravity will pull you down and directly into the sun.
its the earths forward motion that prevents it falling into the sun
Help ,I wanna know if this is correct or not
Answers
Answer:
it looks correct to me but im not 11% sure
Explanation:
A substance with a pH value of 2.3 would be classified as
O strong acid
O weak acid
O strong base
O weak base
Answers
A substance with a pH value of 2.3 would be classified as a strong acid. Option A is correct.
What is ph value?pH stands for "potential hydrogen," and it is a measure of the acidity or basicity (alkalinity) of a solution. The pH scale ranges from 0 to 14, with 7 being neutral (neither acidic nor basic). Solutions with a pH less than 7 are considered acidic, and solutions with a pH greater than 7 are considered basic.
Here,
The pH scale is used to measure the acidity or basicity of a solution. Values on the pH scale range from 0 to 14. Solutions with a pH value less than 7 are considered acidic, and solutions with a pH value greater than 7 are considered basic. The lower the pH value, the more acidic the solution.
A pH value of 2.3 indicates that the solution is strongly acidic, as it is well below the neutral value of 7.
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The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 81.7-kg person straight up by means of a cable. The person has an upward acceleration of 0.729 m/s2 and is lifted from rest through a distance of 7.86 m. (a) What is the tension in the cable
Answers
Answer:
Explanation:
Given that:
distance (z) = 7.86 m
mass of the person = 81.7 kg
Acceleration (a) = 0.729 m/s²
By using Newton's second law along the vertical axis:
[tex]T - mg = ma\\ \\ T = ma + mg \\ \\ T = m(a+g) \\ \\[/tex]
T = 81.7 (0.729 +9.8)
T = 860.22 N
The work done now is:
[tex]W_T = T\times z \\ \\[/tex]
[tex]W_T = 860.22 \times 7.86[/tex]
[tex]\mathbf{W_T =6761.3292\ N}[/tex]
DUE IN AN HOUR! HELP!!
A charged ball has a charge of -3.5x10-17c . How many electrons are found in the ball?
Answers
Answer:
218 electrons
Explanation:
pls find the attached image for solution
How do magnets work and what effect do they have on their surroundings?
Answers
Answer:
Explanation: Magnets can be used in space. ... Magnets don't need gravity or air. Instead, their power comes from the electromagnetic field they generate all by themselves. One class of magnets, called electromagnets, does need electricity to work.
Answer:
magnets work due to a magnetic field and attract or repel an electrically charged or magnetic objects
Explanation:
its magnetism works due to alignment of atoms in a magnetic object
A heavy train of mass 200 tonnes has a maximum speed of 20m/s up a hill inclined at 1.15⁰ to the horizontal when the engine is working at 800 kwatts. What is the resistance to the motion of the train?
Answers
Answer:
https://www.brainlyanswer.com
Explanation:
click the link the answer is in the link:)
Answer:
train to busan
shadow train
the horror train
train game
Write down the units for the following physical quantities:
a. Velocity
b. Acceleration
c. Momentum
d. Force
e. Power
f. Energy
g. Pressure
Answers
Acceleration- KG
Which is not poor conductor?
a) pure water
b) Cotton thread
c) plastic spoon
d) metal vase
Answers
Answer:
Metal vase
Explanation:
Pure water is not a good conductor, and neither is plastic or cotton. Metal is the only one of the four that actually is a good conductor. For example, lighting hitting metal, this happens because the lightning connects to anything that has some kind of conductant.
1.00 x 10^8 kg of clear liquid (specific heat
capacity = 5.11 x 10^2 J/kg•°C) at a temperature
of 15.0°C gains 3.33 x 10^6 J of heat. What is the
final temperature of the liquid? (Assume the
melting point is less than 15.0°C and the boiling
point is greater than 62.0°C.)
Answers
The more mass an object has,the less inertia the object has. True or False
Answers
Answer:
This is true. objects that have a greater mass has greater interia. which also means objects that have a less mass has also less interia.
Explanation:
i hope this helps!!!
Prominences and sunspots are both:
A. Jets of burning gas
B. Patches on the Sun's surface
C. Influenced by the Sun's electromagnetic field
D. Visible during an eclipse
Answers
Answer:
C. Influenced by the Sun's electromagnetic field
Explanation:
"Sunspots occur in pairs because each is one side of a loop of the Sun's magnetic field that reaches the Sun's surface. Solar prominences are the plasma loops that connect two sunspots."
How does the observed spectrum above compare to the thermal radiation curves
you saw in the last section? What are the similarities and differences?
Answers
There is no observed spectrum above, and I didn't see any curves in the last section. So I guess they're similar in that respect.
Otherwise, your question is quite intriguing.
The Sun's primary energy source is
Answers
Answer:
nuclear fusion
Explanation:
converting hydrogen to helium.
When a car's acceleration is negative, what is happening to the car's motion?
the car slows down
the car speeds up
the car travels at a constant speed
the car remains at rest
Answers
Answer:
the car slows down
Explanation:
5. Sarah is standing 32.0 m away from Jason. If Sarah throws a snowball at a 45 degree
angle for maximum distance, what velocity must the snowball have to hit Jason directly.
(Assume Jason and Sarah are about the same height so that if she throws the snowball
from head level, it will hit Jason in the head.)
Answers
Answer:
Explanation:
If air resistance is ignored and assume UP and Toward Jason are the positive directions.
horizontal analysis
d = (vx₀)t
t = d/vx₀
horizontal analysis
0 = vy₀t + ½gt²
0 = vy₀(d/vx₀)+ ½g(d/vx₀)²
as vy₀ = v₀sin45 and vx₀ = v₀cos45 and are equal.
0 = d + ½g(d²/v₀²cos²45)
-d = ½g(d²/v₀²cos²45)
-dv₀² = ½g(d²/cos²45)
v₀² = -½g(d/cos²45)
v₀² = -½(-9.81(32.0/cos²45)
v₀² = 313.92
v₀ = 17.717787...
v₀ = 17.7 m/s
Someone pls help I don’t understand this
Answers
Answer:
[tex]{ \rm{F _{ball \: on \: bat} = - F _{bat \: on \: ball} }}[/tex]
Explanation:
• This is due to the third newtons law of motion which states that "Every action has an equal and opposite reaction".
In the free-body diagram, the magnitude of the normal force is 40 N, the friction force is
25N, the net force is 80N: What is the magnitude of the applied force?
Answers
Answer:
Explanation:
F = 80 + 25 = 105 N
at 30°c an almunium spher is 30cm³ long
the cofficen linear expansion is 24×10`⁶ if the final volume is 30.5cm³
what's the final temperatur of the almunium sphere
Answers
Answer:
Change volume / volume = .5 / 30 = .01666
coefficient of volume expansion = 3 * 24E-6 = 72E-6
Change in temp = .0167 / 24E-6 = 232 deg C
Final temp = 232 + 30 = 262 deg C
Change in volume / volume = 3 * coeff linear expansion * change in deg C
A train travels meters in the first second of travel, 6 meters again during the second second of travel, and 6 meters again during the third second. Its
acceleration is
O 0 m/s
6 m/s
O 12 m/s/s
18 m/s
O None of the above
Answers
Answer:
0 m/sExplanation:
there is no acceleration, it's velocity is always 6m/s
so your answer is 0m/s
How to find force if mass time and distance is given?
Answers
Answer:
For example, speed is a length divided by time. Force is mass times acceleration, and is therefore a mass times a distance divided by the square of a time. We therefore say that [Force] = MLT−2.
1. A 6-volt battery produces a current of 0.5 amps. What is the power in the circuit?
Answers
Answer:
hope this will help you
have a great day
Explanation:
please mark me as the brainliest
g A projectile of mass 3 kg is launched horizontally from an initial height 3 m with an initial velocity 10 m/s. This velocity in the x direction is preserved when you ignore air resistance. The projectile still accelerates in the vertical y direction toward the ground, but this is exactly the energy lost from potential energy. Energy is conserved as long as you use the total mechanical energy equation. What is the final kinetic energy as the projectile just reaches the ground
Answers
Answer:
The kinetic energy at ground will be "238.2 J".
Explanation:
The given values are:
mass,
m = 3 kg
Initial height,
h = 3 m
Initial velocity,
v = 10 m/s
By using the conservation of energy at points A and B,
⇒ [tex]E_A=E_B[/tex]
⇒ [tex]mgh+\frac{1}{2}mv^2=k_B[/tex]
On substituting the values, we get
⇒ [tex]3\times 9.8\times 3+\frac{1}{2}\times 3\times (10)^2=k_B[/tex]
⇒ [tex]88.2+0.5\times 3\times 100=k_B[/tex]
⇒ [tex]88.2+150=k_B[/tex]
⇒ [tex]238.2 =k_B[/tex]
An iron wire has a length of 1.50 m and a cross sectional area of 0.450 mm2. If the resistivity of iron is 10.0 ✕ 10−8 Ω · m and a potential difference of 0.800 V is maintained across its length, determine the current in the wire (in A)
Answers
Answer:
2400A
Explanation:
R=pL/A
R-Resistance
p-Resistivity=10.0 x 10^-8
L-1.5m
A-Cross sectional Area=0.00045
R=10.0 x 10^-8 x 1.5 ÷ 0.00045
and=0.000333333
I-current
V-potential difference
I=V/R
0.800÷0.000333333
Ans=2400A
Children start to gain control over their attention beginning in preschool. This control is related to a growth
spurt in the brain's lobe.
Answers
Answer:
occipital parietal
Explanation:
Hope this helps, plus I took the test
In the absence of air resistance, as an object falls freely, its
O velocity increases
O acceleration increases
both A and B
O none of the above
Answers
Answer:
None of the above
Explanation:
None of the above
plz help owo
What characteristic is shared by sunspots, solar flares, and coronal mass ejections? Select the two correct responses.
They are caused by outward fluctuations of the sun's magnetic field.
They appear as dark spots on the sun's surface.
They tend to occur during active periods of the solar cycle.
They appear as bright spots on the sun's surface.
Answers
Answer:
They are caused by outward fluctuations of the sun's magnetic field.
They tend to occur during active periods of the solar cycle.
Explanation:
While sun spots will appear darker than the surrounding surface, flares will tend to appear brighter. CME's are associated with massive flares.
The two correct responses are as follows:
They are caused by outward fluctuations of the sun's magnetic field.They tend to occur during active periods of the solar cycle.The following information should be considered:
At the time when sunspots should appear darker as compared to the surrounding surface, so flares should be appear brighter. CME's are along with massive flares.Due to this, the above answers are considered.Learn more: brainly.com/question/16911495