Answer:
3 cm
Explanation:
I think the question have some error because if height = 2 m = 200cm.
Volume of box = l * b * h
V = 30 cm³
b = 5 cm
h = 2 cm
l = ?
V = l * b * h
30 cm³ = l * 5 * 2
l = 30 / 10
l = 3 cm
What is the difference between a scientific theory and a scientific law?
Theories combine several laws into one.
Theories are upgraded into laws once they are proven.
Laws use mathematical explanations and theories do not.
Laws describe what happens but theories explain why or how.
Answer:
laws describe what happens but theories explain why or how
(b) On what factor does the mechanical advantage of a simple machine depend? (a) N/m B. Very short answer questions, 1. What is the principle of simple machine? 2. 3. The efficiency of simple machine is 75%. What does it mean? 4. S. What is lever? In how many classes is lever classified? Write the name of a simple machine used to change the direction of force. 6.the velocity ratio of a pulley system is 4.what does it mean? 0 Reliant Science - 9
Answer:
No.b answer
the ratio of the length of the lever arm where the force is applied divided by the length of the lever are that lifts the load.
No.1 answer
if there is no friction in a simple machine, work output and work input are found to be equal in the machine.
No.3 answer
machine that is 75% efficient means that 75% of the work input is obtained as the useful output and the remaining 25% has been lost in overcoming the friction.
No.4 Answer
A lever is a simple machine made of a rigid beam and a fulcrum. In 3 calss lever is classified.
Simple pulleys change the direction of the force used to lift an object over a distance.
ratio of distance travelled by effort to the distance travelled by load in the machine.
Hope this will help you alot
Have a great day ❤️
keep smiling
How does Bolsa describe his new client?
Answer:
loco
Explanation:
What is the net work on the block?
Answer:
A block device is a computer data storage device that supports reading and (optionally) writing data in fixed-size blocks, sectors, or clusters. These blocks are generally 512 bytes or a multiple thereof in size
An apple weighing 1 N falls through a distance of 1m. How much work is done
on the apple by the force of gravity?
Answer:
W = F × d
W = 1 × 1
W = 1 Joule
step by step explanation
An apple is having a force of 1 N and it travels to a distance of 1 m then the work done on the apple by the force of gravity will be equal to 1 J.
What is Work?Work is a physics term used to describe the transfer of energy that occurs when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the strong acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.
Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the pressure is applied at an angle with regard to displacement.
As per the given information in the question,
Force, f = 1 N
Distance, d = 1 m
Then, the work done will be,
W = fd
W = 1 × 1
W = 1 J.
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Write about any 8 areas of field where physics is applied .Illustrate it with examples .
Explanation:
In construction.When constructing roads, buildingIn Engineering, when engineering we use physics such as calculations.At homeIn industries, industries use chemicals and so on.In tailoring, we use the knowledge of physics like when sowing.In carpentry, we use calculations.In Hospitals, we use physics we balancing In Sites, we use energy.Physics is a discipline that its applications cut across all fields. Ranging from banking, cooking, transportation, lecturing, medicine, engineering etc. It is the bed rock of engineering because all aspect of engineering involves the application of Physics.
Some of the fields where Physics is applied are:
a) Lecturing: This field requires the continuous dissemination of Physics knowledge to students from one level to another level.
b) Medicine: The various applications of physics in medicine can not be over-emphasized. This is because medicine involves the use of ultrasound, ionizing and non-ionizing radiation, magnetic resonance etc.
c) Electrical Engineering: In this field, the basic knowledge of Physics is applied to circuits, boards and electrical components.
d) Civil Engineering: The knowledge of stress, strain, shear, force, torque, weight etc are used in a lot of deductions.
e) Broadcasting station: This field make use of a lot of Physics principles so as to increase awareness and pass information. Thus the frequency of a broadcasting station determines her area coverage.
f) Transportation: As all vehicles consists of electrical devices, then the knowledge of Physics can bot be avoided.
g) Communication: Ranging from GPS, GPRS, Data transmission, voice call, email etc requires the knowledge and application of Physics.
h) Archaeology: Though not a related to Physics, but it requires the application of it. Radio-dating and carbon-dating are required to determine the age of some ancestral objects or artifacts.
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PLZ FAST Scientific knowledge is both long lasting and always _______.
changing
non-observable
permanent
untestable
3. ¿Cuál es la distancia focal de un espejo CONVERo sabiendo que un objeto colocado
a 4 cm de él da una imagen virtual situata a 2 cm del espeso? ¿Cuál es el radio de
curvatura del espejo? Determina también las características de la imagen sie
objeto mide 5 cm
i dont know for real
A sample of oxygen gas occupies a volume of 200 mL at a pressure of 720 torr. What volume will the gas occupy at a pressure of 800 torr if temperature is held constant
We have that the gas will occupy at a pressure of 800 torr if temperature is held constant a Volume of
[tex]V_2=0.18L[/tex]
From the Question we are told that
Initial Pressure [tex]P_1=720[/tex]
final Volume [tex]V_1=200mL[/tex]
Initial Pressure [tex]P_2=800[/tex]
final Volume [tex]V_2=?[/tex]
Generally the equation for Boyle's law is mathematically given as
[tex]P_1V_1= P_2V_2[/tex]
Therefore
[tex]V_2=\frac{ P_1V_1}{P_2}\\\\V_2=\frac{ 720*200}{800}\\\\V_2=180mL[/tex]
[tex]V_2=0.18L[/tex]
The gas will occupy at a pressure of 800 torr if temperature is held constant a Volume of
[tex]V_2=0.18L[/tex]
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Which property of a quarter is different on the International Space Station than it is on Earth?
Its mass
Its weight
Its volume
Its density
A projectile is launched vertically with an initial velocity of 50 m/s. How long would it take to reach the top of the launch?
Answer:
Explanation:
Givens
vi = 50 m/s
vf = 0
a = - 9.81
t = ?
Formula
t = (vf - vi)/a
Solution
t = (0 - 50)/-9.81
t = 5.097
Notice that a is made into a minus. It does not mean subtract. It means that the direction of the projectile and gravity must go in opposite directions. You will find that direction is a critically important consideration in physics.
Answer:
It'd take it 5.10 seconds
Explanation:
At the top of the launch, it is maximum height, h
formular derivation :
At maximum height, final velocity, v is zero
From first newtons equation:
[tex]{ \sf{v = u + gt}}[/tex]
v is the final velocity
u is the initial velocity
g is acceleration due to gravity
t is the time taken
but v is zero:
[tex]0 = u + gt \\ gt = u \\ t = \frac{u}{g} [/tex]
since it is vertical motion, u = usin(theta), where angle is 90°
[tex]{ \boxed{t = \frac{u \sin( \theta) }{g} }}[/tex]
t is the time taken to reach the top of the launch:
substitute, taking g to be 9.8 m/s²
[tex]t = \frac{50 \times \sin(90 \degree) }{9.8} = \frac{50}{9.8} \\ \\ { \boxed{ \boxed{time = 5.10 \: seconds}}}[/tex]
A hydrogen atom has a diameter of about 12.7 nm, express this diameter in centimeters.
We have to convert 12.7nm to cm
[tex]\\ \sf\longmapsto 12.7nm[/tex]
[tex]\\ \sf\longmapsto 12.7\times 10^{-9}m[/tex]
[tex]\\ \sf\longmapsto 0.127\times 10^{-7}m[/tex]
[tex]\\ \sf\longmapsto 0.00000127\times 10^{-2}[/tex]
[tex]\\ \sf\longmapsto 0.0000013cm[/tex]
If you divide a force measured in newtons (1 new-
ton = 1 kg•m/s?) by a speed expressed in meters per
second, in what units will the answer be expressed?
Applying the speed of Sound
Johnny was playing baseball with his friends and they noticed a bolt of lightning They heard thunder seven seconds
How far away is the storm?
meters
Answer:
2,317
Explanation:
on e
will mark brainliest!
Answer:
b=t-p(m-n)/s
Explanation:
how do i get the correct answer for 0.429m to mm
the answer for 0.429m to mm is 429
Answer:
0.429m=429 mm
Explanation:
Since there are 1,000 millimeters per meter, you need to multiply by 1,000 to convert from meters to millimeters.
Precision is how close a series of measurements are to ______
Answer:
Accuracy is how close a measured value is to an accepted value. Precision is how close measurements are to one another. To make measurements, you have to evaluate both the accuracy and the precision to get a correct value.
(c) What are the factors of work? Also write their relation with work.
Answer:
Explanation:
Appreciation for your work.Good relationships with colleagues.Good work-life balance.Good relationships with superiors.Company's financial stability.Learning and career development.Job security.Attractive fixed salary.Good relationships with colleagues. Good work-life balance. Good relationships with superiors. Company's financial stability.
what is potential energy
Answer:
it is a type of energy with the formula of u=mgh
Explanation:
m means mass
g means gravitational field and
h means height
The motion of the particles is most orderly in
Answer:
Solids
Explanation:
Particles are most orderly in solids.
help me please i dont understand
Answer:
0.58
Explanation:
Sinẞ = opposite ÷ hypotenuse
Sinẞ = 5 ÷ 8.6
Sinẞ = 0.5814
Sinẞ ≈ 0.58
Answer: 0.58
Explanation:
hope this helps
Fun Fact: Peanuts aren’t technically nuts
what is force (just trying this app)
Answer: F= force
m=mass of an object
a=acceleration
Explanation: Force is kinda like gravity, but the real noun would be “strength or energy as an attribute of physical action or movement.”
The 2 Vectors shown in the image below are combined.What is the resultant quantity?
Option A is correct. The resultant quantity is 50m/s to the right.
Vector quantities are quantities that have both magnitude and direction.
From the diagram shown, we can see that 100m/s vector moves in the positive x-direction, this means that the of magnitude the vector is +100m/s.
For the vector 50m/s, we can see that it is moving in the negative x-direction, this shows that the magnitude of the 50m/s vector is -50m/s.
Resultant speed = +100 - 50
Resultant speed = +50m/s
Since the resultant speed is a positive value, this mean that the resultant quantity will be moving towards the right.
Hence the correct option will be 50m/s to the right.
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why does sound not transmit in vacuum
Answer:
because sound needs medium to transmit.
The sound is produced by vibration and if there is no medium there is no vibration and no vibration means no sound.
help me please i dont understand
Answer:
It is b
Explanation:
The question tells you that the distance was increased 3 times the original distance, which means it was moved 3 times
Which unit is used to measure the mass of a computer?
Answer:
kilogram
Explanation:
will mark brainliest!
Answer:
Explanation:
Fa - u*m*g = m*a
Fa = u*m*g + m*a
Fa - m*a = u*m*g
u = [tex]\frac{Fa - m*a}{m*g}[/tex]
Fatima is watching her pet cat, Winter, napping in the sun. Fatima is curious about the heart rate of Winter when she is napping, so she develops this scientific question: Does a cat’s heart rate change while it is napping
We have that for the question, Does a cat’s heart rate change while it is napping?
Cats heart rate do not increase while napping.
The range of heart beat of a cat is 140 and 220 bpm
From the Question we are asked
Does a cat’s heart rate change while it is napping.
The answer is NO
Cats heart rate do not increase while napping. Cat have a normal heart beat maximum of 220 beats per minute consistently.The range of heart beat of a cat is 140 and 220 bpm
Therefore
There is something with a cat with heart rate above this number.
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Help me with this quesiton
3) While driving home you see a deer leap out in front of you car. If you slam on your breaks to avoid hitting the deer, and it slows you down from 20m/s to 10m/s in 2 seconds what was your acceleration during this time?
Answer:
Hope that helps...thats the formular you use when it involves two speeds
