Explanation:
Hey, there!!
Single movable pulley has 2 VR because in single fixed pulley, load is supported with two segments of the string. It makes the effort distance double of the load distance. {As VR = No.of pulley used or number of rope segments that supports the load.}
Hope it helps...
What is best for magnets? Aluminum Silver Plzzzzz help
Answer:
Aluminum
Explanation:
Silver is not good for magnets, it doesn't hold magnetic properties. Hope this helps.
Answer:
Aluminum
All the elements that are magnetic:
Iron
Cobalt
Nickel
Aluminum
Neodymium
Samarium
Boron
Dysprosium
Chromium
Zinc
Barium
Strontium
Bismuth
As you can see silver is not on the list of every elements that are magnetic and aluminum is.
Hope this helps!
when 20 grams of water is heated from 10 c to 15 c, the required energy in joule is
Answer:
418.6 J
Explanation:
We know the specific heat for water is 4.186 kJ/kg * °C, so this can also write as 4.186 J/g * °C, so the heat increases 5 C in this question, so you can get 4.186(J/g * C) * 5C * 20g = 418.6 J
Microwave ovens heat food through the process of A) COnduction B) Convection C) Radiation D)Stratification
Answer:
[tex]\huge\boxed{Radiation}[/tex]
Explanation:
In microwave, there are waves called "microwaves" as per the name. So, The heating of food is done with the help of waves. Radiation is "the transfer of heat through waves". That is why the process of heating food in a microwave is "Radiation".
Answer:
[tex]\huge \boxed{\mathrm{\bold{C.} \ Radiation}}[/tex]
Explanation:
Microwaves heat food through the form of waves.
The waves are electromagnetic waves that transfer heat through the process of radiation.
calculate The number of neutrons present in the nucleus if an atom X with number of electron 15, and mass number 31. identify the Element..
ans=17. Chlorine
Explanation:
You subtract 15 which is the electron from 35 which is the mass number to get the neutron, and note number of electrons is same as number of protons. chlorine is the 17th element of the periodic table
a rocket starts from rest to 12s , it’s speed became 120m. find the distance it covered
Answer:
1440 m
Explanation:
Speed = Distance/Time
Distance = Speed × Time
= 120 × 12
= 1440m
you must design a runway that allows planes to reach a ground speed of 65 m/s before they can take off. If the planes accelerate at 2.5m/s/s, what must the minimum length of the runway be?
Answer:
d = 845 m
Explanation:
This is an exercise in kinematics, specifically accelerated motion, let's use the equation
v² = v₀² + 2 a d
since airplanes start from rest their initial velocity is zero
v² = 2ad
d = v2 / 2a
let's calculate
d = 65² / (2 2.5)
d = 845 m
this is the minimum distance from the track
A car accelerates uniformly from rest to a speed of 18 m/s in 12 seconds. Find the acceleration of the car over this period.
The correct answer is [tex]1.5 m/ s^{2}[/tex]
Explanation:
In general terms, the acceleration refers to how velocity changes or increases. This is measured in meters per second squared ([tex]m/s^{2}[/tex]) or similar units such as kilometers per hour squared ([tex]km/h^{2}[/tex]). Moreover, to calculate acceleration it is necessary to subtract the initial velocity from the final velocity and then divide this into the time. The formula and operation are shown below:
[tex]a (acceleration) = \frac{v (final velocity) - u (initial velocity)}{t (time)}[/tex]
[tex]a= \frac{18 m/s - 0 m/s}{12 s}[/tex] (Initial velocity is 0 m/s because the car was at rest)
[tex]a = \frac{18 m/s}{ 12 s}[/tex]
[tex]a = 1.5 m/s^{2}[/tex]
According to this, the acceleration of the car was [tex]1.5 m/s^{2}[/tex]
Explain the following (using the concepts of moment, center of gravity and stability.) a) Racing cars are low, with wide wheels. b) It is difficult to steer a bicycle by gripping the center of the handlebars
Answer:
b
Explanation:
Melody is riding her mountain bike along a trail with multiple hills. At the bottom of the second hill, she has 3200 J of kinetic energy. At the top of the third hill, when she is going the slowest, her potential energy measures 1650 J. Which statement below is true? A. The total amount of energy at the bottom of the hill cannot equal the amount at the top, because some of the energy from the environment is gained. B. The total amount of energy at the top is equal to the amount at the bottowm, but she gained some energy as she traveled due to a higher speed going down the first two hills. C. The total amount of energy at the bottom of the hill cannot be equal to the amount at the top, because some of the energy is lost.
Answer:
Eventually it reaches bottom of hill so C
Explanation:
what is the formula for solving force
Answer:
[tex]\boxed{\sf{f=m*a}}[/tex]Explanation:
The formula of force is:
[tex]\Longrightarrow: \sf{F=M*A}[/tex]
F= forceM= massA= accerlerationForce = Mass* Acceleration
I hope this helps. Let me know if you have any questions.
what do you mean by electromagnet induction?under what condition is this phenomenon possible?
Answer:
Electromagnetic induction is a phenomenon in which a changing magnetic field across a loop of wire results in the generation of an induced emf. When there is relative motion between a magnet and the coil, magnetic flux changes and hence an electromotive force is generated in the coil.
Select the correct answer.
You travel in a circle, whose circumference is 8 kilometers, at an average speed of 8 kilometers/hour. If you stop at the same point you started
from, what is your average velocity?
OA. O kilometers/hour
ОВ. 2 kilometers/hour
OC. 4 kilometers/hour
OD. 8 kilometers/hour
О Е. 16 kilometers/hour
Answer:
A. 0 kilometers/hour
Explanation:
Your net displacement is zero, so the average velocity is zero.
velocity = displacement / time
where displacement is a vector quantity.
can someone please tell the ans of this question too.
Answer:
It's of A number.
ans=70
Explanation:
Answer:
A 70 sec
Explanation:
2. The stage choreography for a play requires an
actor to walk 5 steps forward, 9 steps left, and
2 steps backward to be standing over the trap
door. What are the components of the actor's
motion from the starting position?
O a. 7 steps left and 2 steps forward
Ob.7 steps left and 2 steps backward
O c. 9 steps left and 3 steps backward
d. 9 steps left and 3 steps forward
Answer:
D
Explanation:
Given that the actor walk 5 steps forward, 9 steps left, and 2 steps backward to be standing over the trap
door.
Let first consider the steps forward and the steps backwards
The displacement = 5 - 2 = 3
That is, 3 steps forward.
Therefore,
The components of the actor's
motion from the starting position will be:
9 steps left and 3 steps forward
D is the correct answer.
If a force of 2 N applied over an area of 2 cm², calculate the pressure produced.
Answer:
10000 Pa
Explanation:
Area = [tex]2 cm^2[/tex]
= 2/10000 = [tex]0.0002 m^2[/tex]
We know that,
Formula of pressure =
Pressure = Force/Area = 2N/0.0002 [tex]m^2[/tex] = 10000 Pascal
[tex]\boxed{\sf Pressure=\dfrac{Force}{Area}}[/tex]
[tex]\\ \sf\longmapsto Pressure=\dfrac{2}{0.0002}[/tex]
[tex]\\ \sf\longmapsto Pressure=10000Pa[/tex]
Steve walks from his house 5 km South then turns east and walks 2 km. Then he walks 9 km North to his older sister's house. She gives him a ride to his friend Fred's house 2 km West. Find his distance
Given :
Steve walks from his house 5 km South then turns east and walks 2 km. Then he walks 9 km North to his older sister's house. She gives him a ride to his friend Fred's house 2 km West.
To Find :
The total distance covered by Steve .
Solution :
We know , distance is the actual measurement space between two points .
Now , total distance travelled by Steve is the sum of all distance travelled .
[tex]T=5+2+9+2\\\\T=18\ km[/tex]
So , total distance covered by Steve is 18 km .
Hence , this is the required solution .
The distance Steve traveled is mathematically given as
T=18Km
What is distance has Steve traveled?Question Parameters:
Steve walks from his house 5 km South then turns east and walks 2 km.
Then he walks 9 km North to his older sister's house.
Generally, the total distance has Steve traveled is mathematically given as
T=5+2+9+2
T=18Km
In conclusion, because the distance is the measure of space b/w two points the total distance traveled is
T=18Km
Read more about Mesurement
https://brainly.com/question/17972372
what is the difference between a thermometer and a temperature ?
thermometer is the device used to measure temperature whereas temperature is the degree of hotness or coldness
Answer:
temperature is the measure of hotness or coldness of an object or a place.
thermometer is an instrument used to measure the temperature.
Explanation:
Hope this helps （＾▽＾）
What is the area of a rectangle whose sides are 3.2 m and 8.01 m? Answer in units of m²
Answer:
25.632 m²
Explanation:
area = a*b
area = 3.2m * 8.01m
area = 25.632 m²
Explanation:
sides:3.2m,8.01marea of rectangle=l×b=3.2×8.01[tex]3.2 \times 8.01 = 25.632[/tex]
area=25.632m²Which statement describes a characteristic of a question that can be answered through scientific inquiry? A. It can be answered using a philosophical argument. B. It requires the approval of more than one scientist. C. It requires the application of ethical standards. D. It can be answered using measurements.
Answer:
the correct one is D
Explanation:
A question that can be answered with a scientific investigation must be a question where measurements of some kind can be made and with these measurements check that the question is correct or not.
When examining the answers the correct one is D
What is the velocity of a rocket if it travels a distance of 2400 m in 3 s?
Answer:
v = 800 m/s
Explanation:
Given that,
Distance, d = 2400 m
Time, t = 3 s
We need to find the velocity of a rocket. Distance covered per unit time equals velocity. So,
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{2400\ m}{3\ s}\\\\v=800\ m/s[/tex]
So, the velocity of the truck is 800 m/s.
Rearrange the formula F=ma, and solve for the variable (a)
Answer:
a = F/m
Explanation:
So we have to isolate a, in order to do this we need to move m to the other side, and we do that by diving both sides by m, resulting in a = F/m
please help find the clockwise and anticlockwise
Answer:
clockwise is 2.5 Nm
Anticlockwise is 0.25 F Nm.
Explanation:
Moment is equal to force × distance
How fast will a boat that normally travels 10km/h in still water be moving with respect to land if it sails directly across (perpendicularly) a stream that’s flows at 10km/h ?
Answer:i think 20km
Explanation:
If the earth was hollow and you jumped into the middle, what would happen?
Answer:
Since there is a gravitational pull, you wouldn't reach the other side. You'd probably be floating in the center of the earth.
Cumulative Problem 1
A typical human cell is approximately 11 um in diameter and enclosed by a membrane that is 4,4 nm thick. To
simplify the calculations, model the cell as a sphere.
1) What is the volume of the cell? (Express your answer to two significant figures.)
Answer:
Volume, [tex]V=696.55\ \mu m^3[/tex]
Explanation:
Given that,
The diameter of a human cell is 11 μm
It is enclosed by a membrane that is 4,4 nm thick.
We need to find the volume of the cell. The cell is spherical in shape. The volume of a sphere is given by the formula as follows :
[tex]V=\dfrac{4}{3}\pi r^3[/tex]
r is the radius of the sphere, r = 5.5 μm
So,
[tex]V=\dfrac{4}{3}\times 3.14\times (5.5)^3\\\\V=696.55\ \mu m^3[/tex]
So, the volume of the cell is [tex]696.55\ \mu m^3[/tex].
a bullet of mass 0.01kg is fired from a gun weighing 5.0 kg. if initial velocity of the bullet is 250m/s. Calculate the velocity with which the gun recoils.
Answer:
The formula is MgVg=MbVb.
which is 5×Vg=0.01×250.
5Vg=2.5.
Vg=2.5/5.
Vg=0.5m/s.
1) Displacement is to velocity as ____________ is to acceleration. A) direction B) speed C) time D) velocity
Answer: C) time
Explanation:
if an object is moving with constant speed then its distance time graph will be a straight line. a) along time axis b) along distance axis c) parallel to time axis d)inclined to time axis.
Answer: I’m not sure but the time and distance will be increasing while they required the distance time so my answer is ((A))
Explanation:
Which atom is involved in giving your heart energy to beat?
carbon
gold
oxygen
Iron
which of the following is a quantitative observation?
a. A rough surface
b. An apple is red on color
c. Acid tasting sour
d. A leaf is 10cm long