Answer:
doppler
Explanation:
2.One car with a mass of 400kg is traveling east at 20m/s and collides with a car of mass 800kg traveling west at 15m/s. Assuming the collision is completely inellastic, what is velocity of the first car after the collision?
Answer:
3.33 m/s west
Explanation:
East is the positive direction.
400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v
-4000kgm/s=1200kg*v
v=-3.33
400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.
What is Collision?Collision, which is also known as impact, is the abrupt, powerful coming together in close proximity of two bodies, such as two pool cues, a golf club and a ball, a hammer and a nail, two railroad cars when linked, or a falling object and a floor.
Two factors—the force and the amount of time the items are in contact—affect the outcome of impact in addition to the characteristics of the two objects' materials.
A hard steel ball dropped on a steel plate will typically rebound to almost the same location from whence it was dropped, while a putty or lead ball would not.
Therefore, 400kg*20m/s + 800kg*-15m/s =(400kg+800kg)*v. -4000kgm/s=1200kg*v and v=-3.33.
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Pls Help me .
The finger-like outgrowths of Amoeba helps to ingest food. However, the outgrowths of human intestine help to
(a) digest the fatty food substances (b) make the food soluble
(c) absorb the digested food (d) absorb the undigested food
(c) absorb the digested food
Explanation:
It is called villi' in case of human beings.. That's it..
The finger-like outgrowths in the human intestine are called villi, and their main function is to absorb the digested food. Therefore, the option is (c) absorb the digested food.
What is the function of villi in human ?The villi in the human intestine increase the surface area for absorption, allowing for more efficient uptake of nutrients from the digested food. They contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids. The nutrients are then transported to the liver and other parts of the body for use.
The function of villi in humans is to increase the surface area of the small intestine, which allows for more efficient absorption of nutrients from digested food.
Villi are finger-like projections that line the walls of the small intestine, and they are covered in tiny microvilli that further increase the surface area. The villi contain blood vessels and lymphatic vessels that absorb nutrients such as sugars, amino acids, and fatty acids from the digested food.
These nutrients are then transported to the liver and other parts of the body for use. Without villi, the surface area of the small intestine would be much smaller, and the body would not be able to absorb nutrients as efficiently. Hence, option C is correct.
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Compare the temperature changes in the stratosphere with those in the troposphere.
Answer:
the temperature in the troposphere decreases while the temperature in the stratosphere increases because of the density of air molecules.
Explanation:
sorry ima little late
What happens to the light when it passes through a converging lens?
a) the light spreads apart
b) the light meets at a point
c) the light is reflected backwards
Answer:
B
Explanation:
the lines WILL meet at a point after crossing focal point
Which of the following is velocity?
-35.2 m/s
125 m/s East
All of these are examples of velocity.
+95 m
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Velocity is defined as total displacement occurrence by the given time interval, and since it's a Vector quantity it has direction as well.
So, the correct choice will be ~ B. 125 m/ East
Because it has unit of Velocity ( that is - m/s ) and it shows direction of displacement ( that is - East )
If light travels at 3.00 x 10° m/s, how long does it take light from lightning to reach your house if the bolt was 6.4 x 103
m away from your house?
Answer:
2.13 x 10^-5
Explanation:
light travels at 3.00 x 10^8 m/s
it's like if someone asks how long would it take for a car to go 100 miles if it's traveling 50 miles per hour
you would do
100 ÷ 50
6.4 x 10^3 ÷ 3.00 x 10^8
2.13 x 10^-5
I need help with my homework please? I will give a lot of points and a brainlist.
#1
True
All metals attract magnets
#2
Yes true
Away from magnetic field if you place something it won't attract that
#3
False
Its only possible in case of electromagnetic force fields .
#4
False
Electromagnetic force field
#5
True
do you expect an echo to return to you more quickly on a hot day or a cold day?
Answer:
more quickly on a hot day
Explanation:
The crossbar of a goalpost is 10 feet high. If a field goal is made 25 yards from the base of the goalpost that clears the goal by 1 foot, what is the smallest angle of elevation at which the ball could have been kicked to the nearest degree?.
Answer: 1 degree
Explanation: I looked it up.
another word for iron oxide?
Answer:
Hydrated iron(III) oxide, or ferric oxide
Explanation:
Urgent help needed in number four.
Thank you in advance!
The energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
Energy supplied by the lamp
The energy supplied by the lamp is calculated as follows;
E = Pt
E = IVt
where;
I is current = 0.4 AV is voltage = 12 Vt is time = 5 mins = 5 x 60 s = 300 sE = 0.4 x 12 x 300
E = 1,440 J
Thus, the energy produced by the headlamp at the end of 5 minutes is determined as 1,440 J.
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Write One paragraph to discuss how you can apply to real life what you have learned from the Scientific Investigation you have conducted?
My topic is What makes ice melt faster?
the hot sun
hi
Explanation:
when its sunny (always in my city) then put ice on the sun (not directly to the sun) but where the sun shines
Two bowling balls each have a mass of 8.3 kg. They are located next to each other with their centers 0.165 m apart. What gravitational force do they exert on each other
Hello!
We can use the equation of Newton's Law of Universal Gravitation to solve for the Force of Gravity:
[tex]F_g = \frac{Gm_1m_2}{r^2}[/tex]
Fg = Gravitational Force (N)
G = Gravitational Constant (6.67 × 10⁻¹¹ Nm²/kg²)
m1, m2 = masses (both 8.3 kg in this situation)
r = distance between the center of masses of the objects (0.165 m)
Plug in the given values and solve.
[tex]F_g = \frac{(6.67 \times 10^{-11})(8.3)(8.3)}{(0.165^2)} = \boxed{1.6878 \times 10^{-7} N}[/tex]
Which of the following is Newton's Second Law of Motion?”
“A moving object will continue to move at the same velocity until there is a change in
direction or an external force is applied to it."
"When a force acts on an object, the rate of change of momentum experienced by the
O object is proportional to the size of the force and takes place in the direction in which the
force acts.
"For every force that is exerted by one body on another, there is an equal and opposite
force exerted by the second body on the first."
"A body continues in a state of rest or of uniform velocity unless acted on by an external
force.
Motion
Force
Which property of the ball is constant?
speed
acceleration
direction
momentum
The property of the ball that is constant is acceleration because the rate of it's distance is constant.
What is constant acceleration?Constant acceleration refer to the rate of the velocity of the body that is moving at constant rate or when the rate of change of distance of an object with respect to time is constant.
Therefore, The property of the ball that is constant is acceleration because the rate of it's distance is constant.
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how frequently should a thermometer be calibrated for accuracy
Answer:
Well before every single shift.
Explanation:
I acutally learned this yesterday
An isotope of Technetium has a half-life of 6 hours. If it is given to a patient as part of a medical procedure,
what fraction of the radioisotope remains in the body after one day?
explain what uncertainty is and how you would calculate the uncertainty of a mean result
Answer:
https://stats.stackexchange.com/questions/454120/how-can-i-calculate-uncertainty-of-the-mean-of-a-set-of-samples-with-different-u
Explanation:
A beam of light with a wavelength of 4.0 millimeters is shot at an opaque barrier with four different-sized holes. Which hole will cause the light to diffract to the greatest degree?
Answer:1mm
Explanation:
what do a class 1 lever and a class 2 lever have in common?
a)both levers place the fulcrum in between the applied force and the object being lifted.
b)both levers would lift an object on the same side of the fulcrum as the applied force
c)both levers have an output force in the same direction as the input force.
d)both levers result in a larger output force from a smaller input force.
The similarity between class 1 lever and a class 2 lever is that both levers would lift an object on the same side of the fulcrum as the applied force.
What is a lever?A lever is a rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied.
A lever has three classes based on the position of the fulcrum as follows:
Class 1 has the fulcrum placed between the effort and load Class 2 has the load between the effort and the fulcrumClass 3 has the effort between the load and the fulcrumTherefore, the similarity between class 1 lever and a class 2 lever is that both levers would lift an object on the same side of the fulcrum as the applied force.
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A massless string connects a 10.00 kg mass to a 13.00 kg cart which is resting on a frictionless horizontal surface. The mass hangs over a frictionless pulley. When the mass is released, the cart accelerates to the right. What is the cart’s acceleration? The cart's acceleration is m/s^2. (round to one decimal place)
The cart's acceleration to the right after the mass is released is determined as 7.54 m/s².
Acceleration of the cart
The acceleration of the cart is determined from the net force acting on the mass-cart system.
Upward force = Downward force
ma = mg
13a = 10(9.8)
13a = 98
a = 98/13
a = 7.54 m/s²
Thus, the cart's acceleration to the right after the mass is released is determined as 7.54 m/s².
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Exercises
Question-5 (doable)
A magnified, inverted image is located a distance of 38.0 cm from a converging lens with a focal
length of 10.0 cm. Determine the object distance and tell whether the image is real or virtual
[ 13.6 cm )
[tex]\\ \rm\Rrightarrow \dfrac{1}{u}+\dfrac{1}{v}=\dfrac{1}{f}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{1}{-10}+\dfrac{1}{38}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{-19+5}{190}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{1}{u}=\dfrac{-14}{190}[/tex]
[tex]\\ \rm\Rrightarrow u=\dfrac{190}{-14}[/tex]
[tex]\\ \rm\Rrightarrow u=13.6cm[/tex]
Real
Describe how work done is related to a change in volume of a fluid. 100 points
Answer: work is the pressure acting through the change in volume
Explanation:
In the same way that work is defined as force operating over a distance, work is the pressure acting through the change in volume. Pressure is comparable to force in pressure–volume work, while volume is analogous to distance in the classic definition of work.
Just as we say that work force acting over a distance,for fluids,we can say that work is the pressure acting through the change in volume. for pressure- volume work, pressure is analogous to force, and the traditional defination of work.
If a power source provides 54 watts of power to operate a machine that draws 4.5 amps of current when in use, what is the voltage used by the machine?
Answer:
.V=12v
Explanation:
P=VI
54W=V×4.5A
V=54W/4.5A
V=12V
The mass of the Moon is 7.35 × 1022 kg and its radius is 1738 km. What is the gravitational field strength on the surface of the Moon?
Answer:
g = 1.62 N/kg
Explanation:
g = GM/r²
= (6.67 x 10⁻¹¹ x 7.35 x 10²²) / (1738 x 10³)²
= 1.62 N/kg
Hope this helps!
1. A material through which a wave travels
A.) Velocity
B.) Increases
C.) Decreases
D.) speed
E.) medium
Answer:
Medium
Explanation:
I took a test on this last semester.
What label should mateo place in the marked cell? uses electrical energy provides electrical energy measures electric current controls electric current
The product label which Mateo should place in the marked cell is that it: B. provides electrical energy.
What is a product label?A product label refers to a paper-document which contains information about the chemical elements, nutrients, and other compounds that are present in a product and its function.
In this scenario, the product label which Mateo should place in the marked cell is that this product was designed and developed to provide electrical energy, based on the electrical symbol for battery shown in the image attached below.
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Explain the roles of the sympathetic division and parsympathetic division of the ANS in a fear response.(this is for psychology class,thank you very much)
Answer:
The parasympathetic division increases digestive activity and the sympathetic division decreases it. The Sympathetic Division of the ANS is responsible for mobilizing the body in response to situations that are threatening or otherwise exciting.
Explanation:
Have a great rest of your day
#TheWizzer
Answer:
What he said :3
Explanation:
Have a LOVELY~ day
-Roxanne Wolf
P.S: Novy made this picture for mwe UWU
How does the ratio of tin to copper affect the properties of the alloy bronze?
Answer:
Stronger and harder than either of the pure metals
Explanation:
How are tardigrades related to astronomy?
A.
They live long enough to survive long space journeys.
B.
They are the only life form that requires no oxygen to survive.
C.
They can survive in extreme, harsh environments, including space.
D.
They are able to propel themselves in zero gravity environments.
Tardigrades related to astronomy as they can survive in extreme, harsh environments, including space for long time without oxygen. The correct option is A , B and C.
What is tardigrades?A special adaptation that allows the tiny animal known as the tardigrade to curl up into a dry, lifeless ball and survive for decades.
Tardigrades can undergo utter vacuum and intense pressures more than five times as in the deepest ocean. Temperatures up to 300F and as low as -458F is maintained.
They survive in space and for long time for about 10 days. They can live without water for decades.
Thus, the correct option is A , B and C.
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