Answer:
Cool temperatures of the moist ground cause evaporation, then increased temperatures of the atmosphere form rain.
Explanation:
The amount of sun’s energy that hits an area helps determine the climate of that area. The Brazilian Rainforest has a tropical climate that averages of up to 300 mm of rain during some months. Which of the following best describes the role of the water cycle in determining the rainforest’s weather?
A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235m below. If the plane is traveling horizontally with a speed of 250 km/h (69.4m/s), (a) how far in advance of the recipients ( horizontal distance) must the goods be dropped. (b) Suppose, instead that the plane release the supplies a horizontal distance of 425m in advance of the mountain climbers. What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the climber's position? (c) with what speed do the supplies land in the latter case
Answer:
Explanation:
For vertical displacement of food-supply
if time taken to reach the ground be t
235 = 1/2 g t² , initial velocity downwards is zero.
t = 6.92 s
Horizontal displacement of food during this period
= 6.92 x 69.4 m
= 480.25 m .
b )
time required to cover horizontal distance of 425 m
= 425 / 69.4 = 6.124 s
This time period will be the time of vertical fall of 235 m . Let initial vertical velocity required be u
h = ut + 1/2 gt²
235 = u x 6.124 + .5 x 9.8 x 6.124²
235 = u x 6.124 + 183.76
u = 8.36 m /s
c )
v = u + gt
= 8.36 + 9.8 x 6.124
= 68.37 m /s
This will be vertical component of velocity .
horizontal velocity = 69.4 m /s
resultant velocity = √ ( 68.37² + 69.4²)
= √(4674.45 +4816.36)
= 97.42 m /s
A man exerts a force on a large couch by pushing on it. Which of the following must be a true statement about the couch after he begins pushing?
A. The couch will maintain a constant acceleration due to the man's push.
B. The couch will remain at rest.
C. The couch will remain at rest if the push does not overcome the force of friction.
D. The couch will accelerate and then remain at a constant velocity.
Answer: the answer is c
Explanation:
"W trudnych sytuacjach człowiek znajduje w sobie siłę i odwagę by walczyc " napisze rozprawke w której rozważe w jaki sposób sytuacja zagrożenia wpłynęła na postawę winicjusza i innego bohatera z lektury obowiązkowej
Answer:
Is this even english?
Explanation:
Its unreadable.
if i roll pieces of allium foil in a ball what property of aluminium foil changes as a result of my action
Answer:
Malleability
Explanation:
The ability to roll aluminum foil in a ball is the property of metal called malleability.
Metallic bonds in metals makes it possible for them to take different shape without losing internal cohesion. Metals are malleable and they posses a wide range of physical properties. A malleable metal can be beaten into sheets and molded into many shapes.A plane travels down a runway 2750 m before it lifts off at an angle of 37 degrees from the horizontal. The plane has traveled 1.8 km since its wheels left the ground. What is the displacement of the plane?
Answer: 4.236km
Explanation:
Let's define the point (x, y) as:
x = horizontal distance moved.
y = vertical distance moved.
If the plane starts in the point (0, 0) then:
"A plane travels down a runway 2750 m before it lifts off..."
At this time, the position will be:
P = (0 + 2750m, 0) = (2750m, 0).
"it lifts off at an angle of 37 degrees from the horizontal. The plane has traveled 1.8 km since its wheels left the ground."
In this case, as the angle is measured from the horizontal, the components will be:
x = 1.8km*cos(37°) = 1.438km
y = 1.8km*sin(37°) = 1.083 km
Then the new position is:
P = (2750m + 1.438 km, 0 + 1.083 km)
Let's write it using the same units for all the quantities:
we know that
1km = 1000m
Then:
2750m = (2750/1000) km = 2.750 km.
Then we can write the new position as:
P = (2.750 km + 1.438km, 1.083km) = (4.188km, 1.083km)
Now, we define the displacement as the distance between the final position and the initial position.
The distance between two points (a, b) and (c, d) is:
D = √( (a c)^2 + (b - d)^2)
In this case the points are:
(0, 0) for the initial position
(4.188km, 1.083km) for the final position.
And the displacement will be:
D = √( (4.188km - 0)^2 + (1.083 - 0)^2) = 4.236km
Help me with this please!
Answer:
b i. The curve would be less steep than both of the graphs.
c. The temperature was the same at the start of the experiment so that the only variable changed in the experiment would be the thickness of the walls and the change in temperature can be measured from the same starting temperature, ensuring a fair experiment.
Explanation:
b i. Since you know that a thicker wall conducts heat from the inside room to the surroundings slower (based on my previous answer ;)), heat from the room would be conducted to the surroundings by the thicker wall slower and the temperature change will be less drastic and the graph would be less steep.
c. In an experiment, only one independent variable can be changed and we would normally record the dependent variable to get a conclusion for the experiment as the dependent variable is the variable that is affected by the independent variable. We should not change any other variable in the experiment, such as the starting temperature of the experiment.
For e.g. If you want to find out how the amount of water affects a plant's growth, the amount of water would be the independent variable and that would be the only thing you would change in that experiment. During the experiment, you would record the dependent variable, which is the height of the plant. The type of plants used and the type of soil..etc should be kept the same/constant so that it is a fair experiment, as a better type of soil may make the plant grow taller.
A jet plane flies at a velocity of 200 m/s, east in still air. a) If it flies into a 20 m/s wind heading west, what is its velocity relative to the ground? b) If it flies into a 20 m/s wind heading east, what is its velocity relative to the ground?
Answer:
Explanation:
a) If it flies into a 20 m/s wind heading west
The wind blows against the velocity of plane
resultant velocity = 200 - 20 = 180 m /s
velocity relative to ground = 180 m /s
b ) If it flies into a 20 m/s wind heading east,
wind will support the velocity of plane
resultant velocity = 200 + 20 = 220 m /s .
velocity relative to ground = 220 m /s .
Answer:
so mas o menos
Explanation:
a) If it flies into a 20 m/s wind heading west
The wind blows against the velocity of plane
resultant velocity = 200 - 20 = 180 m /s
velocity relative to ground = 180 m /s
b ) If it flies into a 20 m/s wind heading east,
wind will support the velocity of plane
resultant velocity = 200 + 20 = 220 m /s .
velocity relative to ground = 220 m /s .
A student is helping his teacher move a 40.0 kg aquarium. What net sideways force must he exert on the aquarium to slide it across the floor so that it accelerates at 0.50 m/s2?
Answer:
20 N
Explanation:
From the question given above, the following data were obtained:
Mass (m) of aquarium = 40 kg
Acceleration (a) = 0.50 m/s²
Force (F) =?
Force is simply defined as the product of mass and acceleration. Mathematically, it is expressed as:
Force (F) = mass (m) × acceleration (a)
F = m × a
With the above, we can obtain the force needed to slide the aquarium as follow:
Mass (m) of aquarium = 40 kg
Acceleration (a) = 0.50 m/s²
Force (F) =?
F = m × a
F = 40 × 0.5
F = 20 N
Therefore, a force of 20 N is needed to slide the aquarium.
pls answer quick & an accurate answer will get brainliest
Answer:
3.766 kg or 3.7 kg
Explanation:
F= M*A equation
A metal ion (X) with a charge of 4+ is attracted to a nonmetal ion (Z) with a
charge of 3–. Which of these formulas represents the resulting compound?
A. X₃ Z4
B. 7XZ
C. 3X4Z
O D. X4Z3
help pleaseeeeee
Answer:
A) X3Z4
Explanation:
Answer:
A
Explanation:
In 2-3 sentences, explain the difference between constructive and destructive interference.
Plz help!!
A sledder is moving to the right across unpacked snow and skidding to a stop. Of the forces listed, identify which act upon the sledder
Normal
Friction
Gravity
Tension
Applied
Air Resistance
(More than two)or idk
When A slider is moving to the right across unpacked snow and skidding to a stop, forces act upon the slider are: Normal force, Friction force, Gravity force.
What is force?An object's push or pull is seen as exerting a force. The interaction of the objects produces push and pull. You can also use words like stretch and squeeze to describe force.
The definition of force in physics is: the push or pull on a mass-containing item changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
When a slider is moving to the right across unpacked snow and skidding to a stop gravitational force due to his weight, normal reaction force and frictional resistance force will act upon the slider.
To find more about force, refer the link:
https://brainly.com/question/13191643
#SPJ5
Conduction In Everyday Life Examples
at least 5 plz help
1. Heat transfer from a hot burner on the stove into a pot or pan
2. A metal spoon that gets hot from the boiling water
3. Chocolate candy in your hand that melts because of the heat
4. The wires in your house that conduct electricity
5. Roasting marshmallows, the heat will soften the marshmallow
Answer:
the engine heat from a car you just turned on.
a heater
a pad warmer
a hot pot
using a campfire to roast hot dogs
100 POINTS!!! :D
Write a scientific explanation that describes the interaction between the two skaters caused by the forces that they apply to each other.
Explanation:
... in every interaction, there is a pair of forces acting on the two interacting objects. The size of the force on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Is it true or false that A proton traveling to the right moves in between the two large plates. A vertical electric field, pointing downwards with magnitude 3.0 N/C, is produced by the plates, the field points is in the same direction on the proton as the force felt by a positive test charge
Answer:
False
Explanation:
In the question it is given that a proton travels in the right moves in between the two plates. An electric field that is pointing in the vertically upward direction has magnitude of 3 N/C. The electric field is produced by the plates.
Now from here we can conclude that the direction of the force acting on the proton when the proton is in between the plates acts in the downward direction. While the electric field lines points in the upward direction. Thus the electric point will not be in the direction of the force that acts on the proton.
A plane has a speed of 285 km/h west relative to the air. A wind blows 25 km/h east relative to the ground. what are the planes speed and direction relative to the ground?
Answer:
260 km/h
Explanation:
Motion is said to be relative when the motion observed by the observer depends on the location (frame) of the observer.
When two objects are moving in opposite directions, the relative motion is obtained by subtraction.
Hence the plane is moving at (285 - 25) km/h giving 260 km/h
Does the shape of a skateboard affect how will travel?
Answer:
Yes
Explanation:
The shape will affect the friction and the way the skateboard moves.
All of the following statements concerning drugs and supplements are true EXCEPT: A. Many drugs and supplements are ineffective and expensive. B. Many supplements and drugs are frequently used to improve performance and appearance. C. Supplements and drugs both undergo stringent government testing. D. Supplements and drugs can both cause unwanted side effects. Please select the best answer from the choices provided. A B C D
Answer: C, supplements and drugs both undergo stringent government testing.
Explanation: took the unit test.
hope this helps :)
Answer:
C
Explanation:
A model rocket Was built last weekend. We launched it in a nearby field. The rocket took off Straight up with an initial velocity 62.3 m/s. If it accelerates upward at 4.30 m/s2 until the engines stop 3.73 s later: (a) What is the maximum height the rocket reaches? (b) How long is the rocket in the air? (c) What is the velocity of the rocket as it hits the ground?
Answer:
a) y_total = 575.4 m , b) t_total = 22.56 s , c) v = 106.20 m
Explanation:
a) We can solve this exercise using the scientific relations
Let's find the height reached while the engines are running
v₁ = v₀ + a t
v₁ = 62.3 + 4.30 3.73
v₁ = 78.339 m / s
in this time it rose
y₁ = v₀ t₁ + ½ a t₁²
y₁ = 62.3 3.73 + ½ 4.30 3.73²
y₁ = 262.29 m
At this moment the engines are turned off and the rocket continues in a vertical launch, suppose that the acceleration of gravity is constant in this path
v₂ = v₁ 2 - 2 g y₂
at maximum height the velocity is zero (v₂ = 0)
y₂ = v₁ 2 / 2g
y₂ = 78.339 2/2 9.8
y₂ = 313.11 m
the total height is
y_total = y₁ + y₂
y_total = 262.29 + 313.11
y_total = 575.4 m
b) the time the rocket is in the air is
t_total = t₁ + t₂
where t₂ is the time after the engines have shut down
y = y₁ + v₁ t₂ - ½ g t₂²
y = 0
0 = 262.29 + 78.339 t₂ - ½ 9.8 t₂²
t₂² - 15.99 t₂ - 53.53 = 0
t₂ = [15.99 ±√ (15.99² +4 53.53)] / 2
t₂ = [15.99 ± 21.67] / 2
t₂´ = 18.83 s
t₂´´ = -2.84 s
since the time must be a positive quantity the correct result is t2 = 18.83 s, the total time in the air is
t_total = 3.73 + 18.83
t_total = 22.56 s
c) the speed when it hits the ground
We can perform this calculation starting with the maximum height y = 575.4 m where it has zero initial velocity (vo = 0)
v² = v₀² + 2 g y
v = √ 2gy
v = √ (2 9.8 575.4)
v = 106.20 m
A large object las Less of an attraction on a smaller
True
False
submarines use ______ of air to control their depths in water
Answer:
A supply of compressed air is maintained aboard the submarine in air flasks for life support and for use with the ballast tanks. In addition, the submarine has movable sets of short "wings" called hydroplanes on the stern (back) that help to control the angle of the dive.
Explanation:
Hope this helped u
Have a nice day
NEED HELP ASAP, WILL GIVE BRAINLIEST
Which is an example of convection currents?
marshmallows toasting over a campfire
a pot being heated by an electric burner
feet getting hot when stepping across sand
a radiator emitting warm air and drawing in cool air
Answer:
D-A radiator emitting warm air and drawing in cool air
Explanation:
2. A car is sitting at the top of a hill that is 14 m high. The car has a mass of 53 kg. The car has
energy. Calculate it.
Object X and object Y, of charge +Q and −2Q, respectively, are separated by a distance r0, as shown in the figure.
(a) Determine an equation for the magnitude and direction of the electric force that is exerted on object Y from object X in terms of Q, r0, and physical constants, as appropriate.
(b) The charge of object X is changed so that it has a charge of −4Q, and the separation distance between the two objects is changed to 2r0. In a clear, coherent paragraph-length response that may also contain figures and/or equations, predict how the electric force exerted on object Y from object X changes from part (a), and predict how the net charge of the two object system changes from part (a).
Answer:
(a) The magnitude of the force electric force F = k ×(+Q) × (-2·Q)/r₀² = -2·Q²/(r₀²) which can be written as follows;
[tex]F = \dfrac{k \times (+ Q) \times (-2\cdot Q)}{r_0^2} = -\dfrac{k \times 2 \times Q^2}{r_0^2}[/tex]
Given that the charge of Y is twice the charge on X, we have the charge X will move towards the charge Y which is the +x direction
(b) The force, F, acting between the charges is given as follows;
[tex]F = \dfrac{k \times Q_1 \times Q_2}{r_0^2}[/tex]
When, Q₁ = X = -4Q, Q₂ = Y = -2Q, and r₀ = 2·r₀ we have;
[tex]F = \dfrac{k \times (-4\cdot Q) \times (-2\cdot Q)}{(2 \cdot r_0)^2} = \dfrac{k \times 8 \times Q^2}{4 \cdot r_0^2} = \dfrac{k \times 2 \times Q^2}{r_0^2}[/tex]
Therefore, the electric force exerted on object Y by the object X is the same and acts in an opposite direction to the force of X on Y in (a)
The net charge of the two objects in part (a) is Q - 2Q = -Q
The net charge of the two objects in part (b) is -4Q - 2Q = -6Q
Therefore, the net charge increases by a factor of 6 in part (b)
Explanation:
Which step of mitosis involves the chromosomes lining up in the center of the cell?
Answer:
Metaphase
Explanation:
During metaphase,chromosome line up in the middle of the cell.
Bob roller skates with a constant speed of 6 miles per hour. How long
will he take to travel a distance of 128 miles ?
Calculate the normal force acting on a 150 kg cart that is at rest.
Answer:
N = 1471.5[N]
Explanation:
We must remember that anybody lying on a horizontal surface, the normal force is defined as the vector corresponding to the force of equal magnitude to the product of mass by gravity, but in the opposite direction to the vector of weight.
To calculate the magnitude of the normal force (equal to weight), we can perform the product of mass by gravity.
[tex]w =m*g\\[/tex]
where:
w = weight [N] (units of Newtons)
m = mass = 150 [kg]
g = gravity acceleration = 9.81 [m/s²}
[tex]N=w[/tex]
[tex]N=150*9.81\\N = 1471.5[N][/tex]
what are some of the uses of ultra-sound
Answer:
Ultrasound has been used in a variety of clinical settings, including obstetrics and gynecology, cardiology and cancer detection. The main advantage of ultrasound is that certain structures can be observed without using radiation. Ultrasound can also be done much faster than X-rays or other radiographic techniques
Answer:
Ultrasound can be used for various purposes like diagnosing conditions, including those in the heart, blood vessels, liver and more. Yet most commonly to monitor growth and development of a fetus. A echocardiogram is a ultrasound of the heart.
Explanation:
what is 40% of 230 i need to know soon plz im only 7
Answer:it's 92 my friend
Explanation:
have a great day
Answer:
92
Explanation:
0.4 · 230 = 92
Type the correct answer in the box. Spell the word correctly.
Read the sentence and type the correct answer in the box.
The Lambda-CDM model contains a cosmological constant, denoted by a lambda (λ) which is associated with dark energy and ___________.
Answer:
The Lambda-CDM model contains a cosmological constant, denoted by a lambda (λ), which is associated with dark energy and cold dark matter.
^Also works for Plato users.
Answer:
"cold dark matter"
Explanation:
other person is correct!!!