why freezer is made in the upper part of refrigrator
✒ Answerthe cold air produced from it is denser than the warmer air in the bottom
ExplainationFreezer is normally provided at the top of the refrigerator, because density of the cold air is high compared to the hot air. In a refrigerator the air contacts with the cooling coil and gets cooling.Because of the high density the cold air gets down and the warm air/hot air moves upward and gets cooling from the cooling coil/evaporator coil. This process is repeated. If the Freezer is provided at the bottom place of the refrigerator, the cold air can't to move full area of the refrigerator. So the freezer is normally provided at the top at the refrigerator
Describe, using Bernoulli’s principle, how roofs are lifted off buildings in tornadoes.
During tornadoes
The speed air goes above the roofsSo the air above the roof is gone .So the roof shifts upwards to avoid low air pressureA cloud directly above you is about 10° across. From the weather report you know that the cloud is at an altitude of 2200 m. How wide is the cloud?
Answer:
2 π Θ = 360 where Θ is the angle of 1 rad = 57.3 deg
W = R Θ = 2200 m * 10 / 57.3 = 384 m
Note: The difference between radian measure (distance along arc of circle) and the chord of a circle is quite small for 10 deg - probably the cloud is not completely flat anyway
Which situations describe an elastic collision?
0 Two glass marbles bounce off each other.
O Rodrick flops onto his sofa and sinks into the cushion.
C A tossed water balloon flattens when on lands on the grass.
O
A bowling ball knocks over five pins.
[tex]\qquad\qquad \huge \bf༆ Answer ༄[/tex]
➙ The Correct choice is A
⧠ when two glass marbles bounce off each other, they regain their respective position after collision, since the Loss of energy is minimum, it can be considered as an elastic collision.
Answer:
Explanation:
The question asks "What situations..." and to "Select all the correct answers."
In addition to "two marbles bounce off each other", "a bowling ball knocks over five pins" is another correct answer. The collision between ball and pins is elastic because they are both hard.
A steel cable has a diameter of 0.16 cm. The tensile strength of the steel is 4 × 108 N/m2. What is the approximate tension force that will snap the cable?
A. 8.0×[tex]10^{8}[/tex] N
B. 5.0×[tex]10^{7}[/tex] N
C. 8.0×[tex]10^{6}[/tex] N
D. 4.0×[tex]10^{8}[/tex] N
E. 800 N
Answer:
800 N
Explanation:
The formula to solve this equation is stress = Force/ Area.
The first step is to rearrange this equation for force: Force = stress * area
The second step is to determine the area: A = pi/4 * d^2
A = pi/4 * (0.0016m)^2=0.00000201 m^2
The third step is to substitute the area back into the equation:
Force = (4 * 10^8)(0.00000201) = 804 N
804 N is approximately 800 N
How long does it take light to reach us from the sun, 1. 50 ×108km away?.
Answer:
8 minutes
Explanation:
It take 8 minutes for light to reach us from the sun.
Find the Thrust required to exert a Pressure of 80000 Pascal on an Area of 0.04 m²
Question :-
Find the Thrust required to exert a Pressure of 80000 Pascal on an Area of 0.04 m² .Answer :-
The required Thrust is 3200 N .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Pressure = 80000 PascalArea = 0.04 m²To Find :-
Thrust = ?Solution :-
As per the provided information in the given question, we have been given that the Pressure is 80,000 Pascal . Area is given 0.04 m² . And, we have been asked to calculate the Thrust .
For calculating the Thrust , we will use the Formula :-
Thrust = Pressure × AreaTherefore , by Substituting the given values in the above Formula :-
⇒ Thrust = Pressure × Area
⇒ Thrust = 80000 × 0.04
⇒ Thrust = 3200
Hence :-
Thrust = 3200 N .[tex] \underline {\rule {180pt} {4pt}} [/tex]
Provided that:
Pressure = 80,000 PascalArea = 0.04 m sq.To determine:
ThrustSolution:
Thrust = 3200 NUsing concept:
Pressure formulaUsing formula:
Pressure = Force/ AreaRequired Solution:
»»» Pressure = Force/Area
»»» Pressure = Thrust/Area
»»» 80000 = Thrust/0.04
»»» 80000 x 0.04 = Thrust
3200 N = Thrust[tex]brainlyeveryday[/tex]
Why MA Is less than VR?
The mechanical advantage (M.A) of a real
machine is always less than its velocity ratio (V.R.)
because mechanical advantage decreases due to the friction and weight of moving parts of the machine where as the velocity ratio remains constant.
#brainlyeveryday
It takes approximately one second for light to travel from the moon to earth suppose there was a large mirror on the moon now a bright light flashes on earth how long will it take for you to see the light reflected by tthe mirror explain how you got your answer
Answer:
You would notice it right away.
Explanation:
When you hear or see something, it is happening right at that moment. It takes you less than a second to realize it.
Define Electromagnet.?
Thnx!
Answer:
A soft metal core made into a magnet by the passage-way of elecric current throus a coill around it.
Answer:
An electromagnet is a magnet that magnetic field is generated by an electric current. Wire coiled into a coil is used to make electromagnets. A current flowing through the wire produces a magnetic field that is focused in the hole, which serves as the coil's core.
Explanation:
A device of 400 W works in 220 V power supply . What is the Current passing through the Device ?
Question :-
A Device of 400 W works in 220 V Power supply. What is the Current passing through Device ?Answer :-
Current is 1.81 Ampere .[tex] \rule {180pt} {2pt} [/tex]
Given :-
Power = 400 WattVoltage = 220 VoltTo Find :-
Current = ?Solution :-
As per the provided information in the given question, we have been given that the Power of the Device is 400 Watt . Voltage is given 220 Volt . And, we have been asked to calculate the Current of the Device .
For calculating the Current , we will use the Formula :-
Current = Power / VoltageTherefore , by Substituting the given values in the above Formula :-
⇒ Current = Power / Voltage
⇒ Current = 400 / 220
⇒ Current = 1.81
Hence :-
Current = 1.81 Ampere .[tex] \underline {\rule {180pt} {4pt}} [/tex]
Thunder is heard 7.2 seconds after a bolt of lightning is observed. If the speed of sound is 340 m/s, how far away did the lightning strike?
Answer:
2.448km awayExplanation:mark me brainly pls ty.HELP me need it asap
Answer:
D, D, A, C, D
Explanation:
A 1000 kg car rides over a hill with a radius of curvature of 30 m. What is the maximum speed that the car can
travel over the hill without launching off the hill (when it's too fast to be in circular motion). Round to a whole
number.
Let's say that the car moves over the hill at 10m/s. What is the value of the normal force at the top of the hill? Answer with 2 sig figs
Answer:
hi-
Explanation:
Since v = R , For the car to lose contact with the road, it must be traveling at a speed of 28 m/s or greater when it reaches the crest of the hill. At lower speeds, the car would remain in contact with the road.
explain why light is used for a particular task
Answer:
for seeing small object of low contrast
Explanation:
for example a person who's knitting or sewing would need extra light to see details...
choose the correct answer
if the force which act on object increased to triple it's value and the area decreased nine times the the pressure will
a) increase 3 times
b) decrease 3 times
c) decrease 9 times
d) increase 27 times
If the force which act on object increased to triple it's value and the area decreased nine times the the pressure will..?
Answer:The pressure will decrease 3 times.
[tex]brainlyeveryday[/tex]
A student performed two experiments and noted her observations below. Based on the information above, which of the following best describes the results of the experiments? Select one: Experiment 1 produced a chemical change; Experiment 2 produced a physical change Both experiments created only physical changes. Experiment 1 produced a physical change; Experiment 2 produced a chemical change Both experiments created a chemical change.
A physical change is one in which there is no new substance formed.
What is a physical change?A physical change is one in which there is no new substance formed. On the other hand, a new substance is formed in a chemical change. The following are cues that can show that a chemical change has taken place;
Change in temperatureEvolution of a gasAppearance of colorAppearance of a solid.In the absence of any of these, the experiment is a physical change. The question is incomplete as the observations were not shown here.
Learn more about physical change: https://brainly.com/question/1984022
Affect bush plane as on motion
Answer:
if the thrust is increased
Using the formula F= ma , what acceleration results from
exerting a 25 N horizontal force on a 0.5 kg ball at rest?
Answer:
50 m/s²
Explanation:
Givens:
F = 25N horizontally
m = 0.5 kg
a = ?
We are solving for a, so plug in the known values into the formula F = ma
25N = 0.5kg*a
Divide both sides by 0.5kg
(Note that 1N = 1kg*m/s², so when you divide, kg cancels out leaving you with m/s²)
50 m/s² = a
9:41 AM
What is the volume of a star
Answer:
1
Explanation:
because every number has coffitiant of 1
Answer:
defined as the mean volume of all the parts of an object which can be seen unobscured in all directions from a particular point inside the object.
for a neutron star : a6 = 3/5(Gm^2 / Ro)
= 5.8 × 10^-37MeV
Me - Mass of electron = 9.11 × 10^-31 kg
V - Volume of a neutron star
a6 - constant
V = a6 / 5.8 × 10^-37Me
Why do conductors transfer heat faster than insulators?
Answer:
Conduction is usually faster in certain solids and liquids than in gases. Materials that are good conductors of thermal energy are called thermal conductors. Metals are especially good thermal conductors because they have freely moving electrons that can transfer thermal energy quickly and easily.
Heat transfer by convection happens through the air, and there are millions of minuscule air spaces between the fibers. Heat transfer by radiation is also slow since one fiber must radiate its heat to another.
When we give heat then kinetic energy is increase and this heat is transferred from hot metal to cold metal through this free electrons. As in insulator the free electrons are negligible so that the heat is not transferred from hot junction to cold junction due to absence of this free electrons.
Explanation:
maek me as brainliest
can someone please answer this, ill give you brainliest and your getting 100 points.
Explanation:
Look at South American and African plates
They are going away from each otherThere is a heavy chance of getting youngest rock
electricity and magnetism
Answer:
Electricity is defined as which possess by flow of eloctrons.
Using the same set-up question #23 what happens if the voltage of the battery is decreased by half?
A. The voltage at each bulb increases by half
B. The voltage at each bulb decreases by half
C. The voltage at each bulb stays the same
Answer:
I think the answer is B
Explanation:
If the Voltage is halved, then the current goes down as well so the voltage drop across the lamps will decrease as well.
Can anyone explain and get the answer pls?
FL₁ =Fl₂
80.x₁ = 30.7
x₁=2.625 m
put a lamp in the circuit in such a way as to increase the total current, without affecting the brightness of any of the lamps A and B. PLEASE HELP I HSVE A TEST
In how many ways can sound be produced
Answer:
1
Explanation:
sound is produced by vibration
The loud explosive noise a plane makes when we hear the shock wave that comes from it when it is traveling at or above the speed of sound is called ______________.
Answer:
Sonic boom.
When something breaks the sound barrier. (Moves faster than sound, like lighting)
Explanation:
Try flying a plane.
Which statement demonstrates that ultraviolet (UV) rays are electromagnetic waves?
A.
They require a medium to travel.
B.
They don’t require a medium to travel.
C.
The particles of the medium through which they travel vibrate perpendicularly to the direction of the wave.
D.
The particles of the medium through which they travel vibrate parallel to the direction of the wave.
E.
The particles in the medium through which they travel remain stationary.
A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.5 m in a time of 2.0 s. The acceleration of the ball is:
The acceleration of the ball is 0.25 m/s². Therefore option B is correct.
To determine the acceleration of the ball, we can use the equation of motion for objects moving in a straight line with constant acceleration:
[tex]\[ d = ut + \frac{1}{2}at^2 \][/tex]
where d is the distance traveled, u is the initial velocity (which is zero in this case since the ball is released from rest), a is the acceleration, and t is the time.
In this scenario, the distance traveled is 0.5 m, the initial velocity is 0 m/s, and the time taken is 2.0 s. Plugging these values into the equation, we have:
[tex]\[ 0.5 = 0 + \frac{1}{2} \cdot a \cdot (2.0)^2 \][/tex]
Simplifying the equation, we get:
[tex]\[ 0.5 = 2a \][/tex]
Dividing both sides by 2, we find:
[tex]\[ a = 0.25 \, \text{m/s}^2 \][/tex]
Therefore, the acceleration of the ball is 0.25 m/s². The correct answer is B) 0.25 m/s².
Know more about acceleration:
https://brainly.com/question/30660316
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Your question is incomplete, but most probably your full question was,
A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.5 m in a time of 2.0 s. The acceleration of the ball is
A. 0.125 m/s2.
B. 0.25 m/s2.
C. 0.5 m/s2.
D. 1.0 m/s2.
A 65-kg woman exerts 18 newtons of force onto a 20-kg box. How many newtons of force does the box exert on the woman?
Answer:
I think it's 18 newtons.
Explanation: