The correct answer to this open question is the following.
Although you did not include options for this question, we can say the following.
Trying to be clear and concise, television satellites, which broadcast information as electromagnetic radiation, can send signals from the vacuum of space because electronic radiation can travel throughout space with no medium that transports it. Electronic radiation needs no material channel or medium to travel such as wires or cable.
That is how technology has developed wonders such as satellite communications for telephone, TV, or the internet. Information, data, sound, and images travel through transverse waves that easily move through the vacuum of space.
Electromagnetic radiations are defined as waves that do not require a medium for propagation. The EM waves have electric and magnetic vectors that do not require any medium to propagate.
The arguments can be explained as:
The Television antennae receive the signals in the form of electromagnetic waves.
The waves are transmitted from the satellites present in space. These waves are then transmitted to the TV station, where the information is then broadcasted. Other electronic devices such as cellular phones, computers, and FM radios have been developed using the propagation of the EM waves.
Thus, the EM waves do not require propagation due to which the signals can be easily transmitted from space.
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we know we have exerted a force even when we have no work done
On release 1, a student releases a cart from the top of a ramp, such that the cart travels 190cm before hitting the stopper. The cart increases speed steadily and reaches the bottom of the ramp in 4.00s. What was the magnitude of the cart's acceleration on release 1?
Answer:
0.2375m/s²
Explanation:
Given
S = 190cm = 1.9m
initial velocity u = 0m/s
Time t = 4.00s
Required
acceleration
Using the equation of motion
S = ut + 1/2at²
Substitute
1.9 = 0+1/2a(4)²
1.9 = 8a
a = 1.9/8
a = 0.2375m/s²
The magnitude of the cart's acceleration is 0.2375m/s²
- A 300 kg box of supplies is dropped from a plane and has a parachute attached, if it accelerates down
at 2m/s? what resistive force does the parachute supply?
Answer:
2340 N
Explanation:
There are two forces on the box. Weight force pulling down and resistive force pushing up.
Sum of forces in the y direction:
∑F = ma
F − mg = ma
F = mg + ma
F = m (g + a)
F = (300 kg) (9.8 m/s² + (-2 m/s²))
F = 2340 N
If the deflection of a spring is doubled, then how much does the force change?
Answer:
The force is doubled as well.
Explanation:
If you double the spring then the force doubles as well.
If the deflection of the spring is doubled, the force exerted by the spring will also be doubled.
What is the Hooke's Law?The relationship between the deflection of a spring and the force it exerts is described by Hooke's Law, which states that the force exerted by a spring is directly proportional to its deflection. Mathematically, this can be expressed as:
F = kx
where F is the force exerted by the spring, x is the deflection of the spring, and k is the spring constant, which represents the stiffness of the spring.
If we double the deflection of the spring, then x becomes 2x, and the force exerted by the spring becomes:
F = k(2x) = 2kx
Thus, if the deflection of the spring is doubled, the force exerted by the spring will also be doubled (assuming the spring constant remains constant).
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argue on this can the speed of light be compared to the exact speed if electricity
Answer:
XD
Explanation:
XV
An object is moving to the left. In which direction would a force need to be exerted to make this object slow down?
Answer:
left
Explanation:
When a force is applied in the opposite direction of motion, it opposes the motion of the object, causing its speed to decrease.
What is force?A force is an influence in physics that can change the motion of an object. A force can cause a mass object to change its velocity, or accelerate.
Intuitively, force can be described as a push or a pull. A force is basically a vector quantity as it has both magnitude and direction.
The term "force" has a specific meaning in science. At this level, it is perfectly acceptable to refer to a force as a push or a pull.
Another object applies a force to another. The concept of a force is not restricted to living or non-living things.
To slow a moving object, apply force in the opposite direction to the direction of motion.
Thus, the force should be applied from left to slow down the object.
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If a car moves with a constant acceleration, can you conclude that there are no forces acting on it?
Discuss the significance of the Tropic of Cancer, the Equator, and the
Tropic of Capricorn as they relate to the seasons.
Answer:
im a capricorn may i?
Explanation:
PLEASE HELP ASAP I AM GIVING 30 POINTS PLEASE HELP
How does the sun works
Answer:
The sun works by nuclear fission, because there is so much pressure, it makes it vErY hOt. ( About 10,340 degrees Fahrenheit to be exact, or 5,726 degrees Celsius* )
Explanation:
Hope this helps! <3
Science is the study of the natural world through blank and blank
Answer:
biology. hope this helps
If the coefficient of sliding friction between a 25 kg crate and the floor is 0.45, how much force is required to move the crate at a constant velocity across the floor?
At constant velocity, the crate would be in equilibrium, so that Newton's second law tells us
p + (-f ) = 0
where p and f denote the magnitudes of the added pushing force and friction force, respectively.
The friction force is proportional to the normal force by a factor of µ, the coefficient of friction. There's no vertical movement going on, so Newton's second law says
n + (-w) = 0
where n and w are the magnitude of the normal force and the weight of the crate, respectively.
Compute n :
n = w = (25 kg) (9.80 m/s²) = 245 N
Use this and µ = 0.45 to compute f :
f = µ n = 0.45 (245 N) = 110.25 N
Solve for p :
p + (-110.25 N) = 0
p = 110.25 N ≈ 110 N
The force i.e required to move the crate at a constant velocity across the floor is 110 N.
At the same velocity, the crate should be in equilibrium, so as per Newton's second law, the following formula should be used:
p + (-f ) = 0
p means the magnitudes of the added pushing force
f means the friction force
Calculation of the force:
n = w = (25 kg) (9.80 m/s²) = 245 N
Now
force should be
= µ n
= 0.45 (245 N)
= 110.25 N
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What shape must you make with a wire in a circut to have that current generate a magnetic field that is identical to the magnetic field produced by a normal bar magnet?
a
A straight line
b
An oval
c
A square
d
A coil
Answer:
The correct option is;
d. A coil
Explanation:
When a wire, which is an electric conductor is formed into the shape of a coil, and current is allowed to flow through the wire coil, a magnetic field is generated
The magnetic field generated by the electromagnetic coil has direction that consists of flux emanating from one end of the coil and entering the coil from the other end, similar to that of the magnetic field produced by a normal bar magnet.
Answer:
The maximum speed an object can fall in the presence of air resistance
Newton's third law
A coil
An object is moving to the left. In which direction would a force need to be exerted to make this object stop?
Answer: going right cause both will pull at each other and slow it down
Explanation:
::
A rope has a density and thickness such that a 3.25-centimeter-long segment of it weighs 61.40 grams. There are 28.3495
grams in an ounce and 2.54 centimeters in an inch. How many ounces would a 19.45 inch length of the same rope weigh?
5.10 oz
b. 11.49 OZ
32.92 oz
53.90 OZ
a
C.
d.
Please select the best answer from the choices provided
ООО
с
D
Mark this and retum
Show Me
Save and Exit
Next
Submit
Answer:
A 19.45-inch-long segment of the same rope would weigh 32.92 ounces.
Explanation:
You know that:
3.25 cm length of rope weighs 61.40 grams .There are 28.3495 grams in an ounce .There are 2.54 centimeters in an inch.The rule of three or is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other), knowing the values a, b and c and x being the unknown, we must apply the direct rule of three as follows:
a ⇒ b
c ⇒ x
So [tex]x=\frac{c*b}{a}[/tex]
To find the number of ounces a 19.45-inch length of the same string would weigh, you apply the following rules of three:
If there are 2.54 centimeters in 1 inch, how many centimeters are there in 19.45 inch?[tex]centimeters=\frac{19.45 inch*2.54 centimeters}{1 inch}[/tex]
centimeters=49.403
Now, if 3.25 centimeters long it weighs 61.40 grams, then 49.403 centimeters long, how many grams does it weigh?[tex]grams=\frac{49.403 centimeters*61.40 grams}{3.25 centimeters}[/tex]
grams= 933.34
Finally, if there are 28.3495 grams in 1 ounce, in 933.34 grams how many ounces are there?[tex]ounces=\frac{933.34 grams*1ounce}{28.3495 grams}[/tex]
ounces= 32.92
A 19.45-inch-long segment of the same rope would weigh 32.92 ounces.
Answer:
c
Explanation:
An elephant walks due east for a distance of 7.9 km, turns around and then goes due west for 1.9 km, and finally turns around again and heads 3.6 km due east. What is the displacement traveled by the elephant in meters?
Answer:
The displacement traveled by the elephant is 9600 east
Explanation:
Displacement is defined as an object's change in position which is given by the difference between final and initial location of the object
The displacement of the elephant are, taking east as positive direction of motion;
1) 7.9 km east = + 7.9 km
2) 1.9 km west = -1.9 km
3) 3.6 km east = 3.6 km
The net (sum) displacement of the elephant, ∑Δx is given as follows;
∑Δx = 7.9 km - 1.6 km + 3.6 km = 9.6 km
Given that the sum of the displacement is positive and that 9.6 km = 9600 m, we have;
The displacement traveled by the elephant = ∑Δx = 9600 east.
Which process is most responsible for moving heat through the atmosphere?
Answer:
Convection
Explanation:
Heat transfer by movement of heated materials is called convection. Heat that radiates from the ground initiates convection cells in the atmosphere.
4 facts about light waves
What is the difference between EMS waves and mechanical waves? Select all that apply. * Mechanical wave require a medium to travel on. EMS waves do NOT require a medium to travel on. EMS waves do NOT require a medium to travel on but, they can use a medium to travel on.
Answer:
EMS waves require no material medium to travel
Explanation:
Here, we want to consider the difference between mechanical waves and EMS waves
When we talk of EMS waves, we mean electromagnetic radiation waves .
Example of EMS waves include radio waves , x-rays etc
These kind of waves require no material medium to travel and this is the main difference they have with mechanical waves
How many peanut butter cups does Benny have if he has 2 times as many as Karen. Karen has 80 peanut butter cups.
Answer:
160 peanut butter cups
Explanation:
80 * 2 = 160
Answer:
160
Explanation:
if benny has 2x more than karen and karen has 80 you would multiply 80 by 2 to get 160. therefore benny has 160. hope that helps
PLEASE HELP ME!
Which statement about nuclear reactions is NOT true?
a.
Nuclear power plants use fission of uranium.
b.
In fission, the total mass of the reactants equals the total mass of the products.
c.
In fission, nuclei are split, and in fusion, nuclei are combined.
d.
Energy as heat and light in the sun are generated by hydrogen fusion reactions.
Answer:
b. In fission, the total mass of the reactants equals the total mass of the products.
Explanation:
In a nuclear reaction, the total mass of the reactants does not equal to the total mass of the products.
This is because mass is converted to energy in a nuclear reaction.
It is true that nuclear power plants use fission. Uranium is the fuel in most reactors used to generate electricity. During nuclear fission, an unstable nucleus is split and in fusion, atoms are combined together. Heat and light is produced in the sun which are generated by hydrogen fusion reactions.PLEASE HELP!! ILL MARK BRAINLYEST!!
The Law of Conservation of Matter is a basic principle in studying chemical reactions.
True
False
Answer:it is false
Explanation:
what are these things called
Newton's First Law of
Motion
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force
Answer:
An object in motion will stay in motion unless acted on by an unbalanced force.
An object at rest will stay at rest unless acted on by an unbalanced force.
An object in motion will stay in motion, and an object at rest will stay at rest unless acted on by an unbalanced force
(There are three parts to Newton’s First Law of Motion)
Tell me a model that scientist have revised? Explain how it was changed.
does anybody know?? Please help
An atom that does not have a net charge of zero is called an
Answer:
If an atom loses or gains electrons, it becomes an ion with a positive or negative charge. So an ion is a special case of an atom when it has a total charge that is not zero. Usually if someone is talking about an atom with a positive or negative total charge, they will call it an ion rather than just an atom
Explanation:
a sample o aluminum is put in 10.5 mL of water. if the water rises to 13.5 mL when the aluminum is added, what is the density of the aluminum if it has a mass of 8.1 g
Answer:
The answer is 2.7 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
volume = final volume of water - initial volume of water
volume = 13.5 - 10.5 = 3 mL
From the question we have
[tex]density = \frac{8.1}{3} \\ [/tex]
We have the final answer as
2.7 g/mLHope this helps you
A student kicks a football vertically upwards, causing the football to reach a maximum height of 40.0m before falling back to the ground. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the football.
A) With what speed was the football kicked?
B) What was the football's total flight time?
Answer:
A. 28 m/s
B. 5.72 s
Explanation:
The following data were obtained from the question:
Maximum height (h) = 40 m
Acceleration due to gravity (g) = 9.8 m/s²
A. Determination of the initial velocity.
Maximum height (h) = 40 m
Acceleration due to gravity (g) = 9.8 m/s²
Velocity at maximum height (v) = 0 m/s
Initial velocity (u) =.?
v² = u² – 2gh (Ball is going against gravity)
0² = u² – (2 × 9.8 × 40)
0 = u² – 784
Collect like terms
0 + 784 = u²
784 = u²
Take the square root of both side
u = √784
u = 28 m/s
Thus, the ball was kicked with a velocity of 28 m/s
B. Determination of the time of flight.
We'll begin by calculating the time taken to reach the maximum height. This can be obtained as follow:
Velocity at maximum height (v) = 0 m/s
Initial velocity (u) = 28 m/s
Time taken to reach the maximum height (t) =?
v = u – gt (Ball is going against gravity)
0 = 28 – 9.8t
Rearrange
0 + 9.8t = 28
9.8t = 28
Divide both side by 9.8
t = 28/9.8
t = 2.86 s
Finally, we shall determine the the time of flight as follow:
Time taken to reach the maximum height (t) = 2.86 s
Time of flight (T) =?
T = 2t
T = 2 × 2.86
T = 5.72 s
Therefore, the time of flight for the ball is 5.72 s
El elevador hidráulico de un garaje funciona mediante una prensa hidráulica conectada a una toma de agua de la red urbana que llega a la máquina con una presión de 5x10 5 N/m 2 . Si el radio del émbolo es de 20 cm y el rendimiento es de un 90% ¿Cuál es el valor en toneladas de la carga que como máximo puede levantar el elevador.
Answer:
El elevador puede levantar 5.76 toneladas de carga máxima.
Explanation:
De acuerdo a la ley de Pascal:
[tex] p_{1} = p_{2} [/tex]
[tex] \frac{F_{1}}{A_{1}} = \frac{F_{2}}{A_{2}} [/tex] (1)
En donde:
F: es la fuerza
P: es la presión
A: es el área
Sabiend que p₁ = 5x10⁵ N/m², tenemos que F₂ es:
[tex] F_{2} = p_{1}A_{2} [/tex] (2)
El área del embolo viene dada por el área de una circunferencia:
[tex] A_{2} = \pi r^{2} [/tex] (3)
Introduciendo la ecuación (3) en la ecuación (2) tenemos:
[tex] F_{2} = p_{1}\pi r^{2} = 5 \cdot 10^{5} N/m^{2} \pi (0.20 m)^{2} = 62832 N [/tex]
Dado que el rendimiento es del 90%, la fuerza máxima es:
[tex] F_{2} = 62832 N*0.90 = 56549 N [/tex]
Ahora sabemos que la fuerza del elevador para levantar la carga máxima es 56549 N y para encontrar el valor de toneladas de la carga máxima que puede levantar el elevador, debemos encontar la fuerza necesaria para levantar 1 tonelada:
[tex] F = mg = 1000 kg*9.81 m/s^{2} = 9810 N [/tex]
Finalmente, si para levantar 1 tonelada se debe aplicar una fuerza de 9810 N, y la fuerza total es igual a 56549 N, el numero de toneladas que puede levantar el elevador es:
[tex] N = \frac{F_{2}* 1 ton}{F} = \frac{56549 N* 1 ton}{9810 N} = 5.76 ton [/tex]
Por lo tanto, el elevador puede levantar 5.76 toneladas de carga máxima.
Espero que te sea de utilidad!
