The first artificial satellite to be launched into space was called _____________.
What happens to the efficiency of a ramp if friction is reduced?
What is planck's constant? choose 2 answers. a when the energy e of a photon is multiplied by its frequency f b 6.623 x 10-34 j.s c when the energy e of a photon is divided by its frequency f d 6.022 x 1023?
Building up electric charges on a Van de Graaff generator is an example of static
Static electricity is shown by building up electric charges on a Van de Graaff generator. Given statement is correct.
What is static electricity?The imbalance of electric charges within or on the surface of a substance, or between materials, is known as static electricity.
Static electricity is generated by Van de Graaff generators. Static does not include acceleration, implying that it is stationary, which pertains to the formation of electric charges.
Static electricity is shown by building up electric charges on a Van de Graaff generator.
Hence,given statement is correct.
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What is not a similarity between symbolic and analogical representations
Answer:
(1) Physical characteristics different.
(2) Difference in direct relation of mental picture with the real object.
Explanation:
There are the points which describe the non similarities between symbolic and analogical representation:
Analogical representation is the representation that can share some of its physical characteristics with an object whereas symbolic representation is the representation which does not corresponds to physical characteristics of an object.In analogical representation, mental picture have direct relation to the actual object whereas in symbolic representation, mental picture does not have direct relation with an object.The speed of a wave is 65 m/sec ifthe wavelength of the wave is 0.8 meters what is the frequency of yhe wave
True or false canvassing is an approach used to justify leads!!!hurry
what can you tell about the hydrogen/hydroxide ion concentration of the unknown liquid
Which statement best compares conduction, convection, and radiation?
Convection and radiation transfer thermal energy through matter only, and conduction transfers thermal energy through both matter and empty space.
Radiation and conduction transfer thermal energy through matter only, and convection transfers thermal energy through both matter and empty space.
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
Conduction, convection, and radiation transfer thermal energy through both matter and empty space.
In conduction mode of heat transfer energy is transferred through medium molecules by their vibration about their own position. SO here medium particles remain at their own position while energy is transferred from one point to other
In convection mode of heat transfer the heat is carried by the medium molecules from one place to other. So here medium moles itself transfer with the energy.
In radiation mode heat energy is transferred through electromagnetic waves so there is no medium required for this.
So correct answer is
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
Convection and conduction transfer thermal energy through matter only, and radiation transfers thermal energy through both matter and empty space.
The four terrestrial planets are so called because they ?
A cube shaped pool is half full of water. if the water is 3 feet deep, what is the volume when the water is all the way to the top?
The volume of the cube-shaped pool when filled to the top is 27 cubic feet, as the cube has a side length of 3 feet.
To determine the volume of a cube-shaped pool when it is filled to the top, given that the water is currently 3 feet deep and at half capacity, we can apply the formula for the volume of a cube: Volume = length times width times height. Since the pool is half full, and given that the height of the water is 3 feet, it means that the length of a side of the cube is also 3 feet, as it is a cube shaped pool.
Therefore, the volume of the pool when full would be:
Volume = 3 feet times 3 feet times 3 feet = 27 cubic feet.
This calculated volume represents the pool's total capacity, assuming it's filled all the way to the top.
You must raise the weight to a height of 10 meters. You cannot do it! Thinking back to what you have learned in science class, you set up the pulley you see here. How does using this pulley reduce the force needed to lift the weight 10 meters?
Answer:
C.The amount of force stays the same; the direction changes. You pull down to move something up.
Explanation:
i got it right so trust me. if you dont ur loss
In electromagnetic induction, does the direction of the magnet’s motion influence the direction of the induced current?
a cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's acceleration in m/s?
The acceleration of a cheetah that can increase its speed from 0 to 70 mph in 2.2 seconds is 14.224 m/s² after converting the velocity into meters per second.
Explanation:To calculate the acceleration of a cheetah that can go from 0 to 70 mph in 2.2 seconds, we first need to convert the speed from miles per hour (mph) to meters per second (m/s). The conversion factor is 1 mph = 0.44704 m/s. So, 70 mph is equivalent to 70 × 0.44704 m/s, which equals 31.2928 m/s. According to the formula for acceleration (a), which is the change in velocity (Δv) divided by the time (Δt), the cheetah's acceleration would be:
a = Δv / Δt = (31.2928 m/s - 0 m/s) / 2.2 s = 14.224 m/s²
Therefore, the cheetah's acceleration is 14.224 m/s².
What are the relative positions of the sun moon and earth during a full moon?
a 4.0 kg object is acted upon by a 20 n force to the right and a 25 n force to the left. what is the magnitude of the objects accerlation
What kind of circuit is the one shown below?
Answer:
The given circuit diagram shows parallel circuit.
Explanation:
In this circuit diagram two bulbs are connected in parallel combination because current flows from the battery gets bifurcated at the junction. Thus, two bulbs are connected in parallel combination.
This parallel combinations of bulbs then connected to the battery given in the diagram. So, the combinations of bulbs are connected in parallel combinations with the battery.
Hence, both bulbs and battery are connected in parallel combinations with each other.
The circuit diagram shown in figure is parallel.
Answer:
The given circuit is in
Series circuit is the one in which there is more than one resistor.
Combination circuit is the one in which gates are used to form the circuit.
Open circuit is the one in which there is no battery.
Parallel circuit is one in which current is divided in different paths.
Here, we can see that we have a battery in the circuit that means it is closed circuit.
And Current is divided that means it is parallel combination.
Therefore, Option D is correct that is parallel.
If the concentration of sn2+ in the cathode compartment is 1.50 m and the cell generates an emf of 0.24 v , what is the concentration of pb2+ in the anode compartment?
Answer:
4.8*10^-8M
Explanation:
To determine the concentration of Pb2+ in the anode compartment, we can use the Nernst equation. By rearranging the Nernst equation and plugging in the given values, we can calculate the concentration of Pb2+ in the anode compartment.
Explanation:To determine the concentration of Pb2+ in the anode compartment, we need to use the Nernst equation. The Nernst equation relates the cell potential to the concentration of ions in each compartment of the cell. It is given by: Ecell = E°cell - (0.0592/n) × log([Pb2+]/[Sn2+]), where Ecell is the cell potential, E°cell is the standard cell potential, [Pb2+] is the concentration of Pb2+ in the anode compartment, [Sn2+] is the concentration of Sn2+ in the cathode compartment, and n is the number of electrons transferred in the balanced redox reaction.
In this case, the cell potential is 0.24 V, [Sn2+] is 1.50 M, and n is 2 (since it is a Sn2+/Pb2+ redox reaction). Therefore, the equation becomes: 0.24 = E°cell - (0.0592/2) × log([Pb2+]/1.50). We can rearrange this equation to solve for [Pb2+]: [Pb2+] = (10^((E°cell - 0.24) × 2 / 0.0592)) × 1.50.
A person starts walking at a constant speed of 2.3 m/s in a straight line from point A to point B . At point B, she turns around and walks back to point A at a speed of 1.1 m/S. What was her average speed for the entire trip in m/s?
To calculate the average speed of the person's entire trip, you would use the formula of total distance divided by total time. In this scenario, the total distance is twice the distance from point A and B, and the total time is the sum of the times taken to walk from A to B and back.
Explanation:The question is asking about the concept of average speed, which in physics is defined as the total distance travelled divided by the total time taken. In this case, the subject walks from point A to B and then retraces her steps back to A.
Since she's retracing her exact path, the total distance travelled is essentially twice the distance from A to B. The total time taken is the time taken to walk from A to B plus the time taken to walk back.
Firstly, we would determine the time taken for each leg of the journey by dividing the distance, say 'd', by her speed. However, since we don't have a specific distance given, we can use variables.
Let's say the time taken to travel from A to B is 't1' (d/2.3) and from B to A is 't2' (d/1.1).
Her total journey time 'T' is the sum of 't1' and 't2'. To get the average speed, we divide the total distance travelled (which is '2d') by 'T'. This would give us an equation that represents her average speed for the entire trip.
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A person starts walking at a constant speed of 2.3 m/s in a straight line from point A to point B. At point B she turns around and walks back to point A at a speed of 1.1 m/s
Let distance between A and B be s.
When she goes from A to B,
Time taken = Distance travelled/ Speed
= s/ 2.3
When she goes from B to A,
Time taken= Distance travelled/ Speed
= s/1.1
Total distance travelled= s+s= 2s
Total time taken:
= s/2.3+s/1.1
=1.1s+2.3s/1.1*2.3
=3.4s/2.53
Average speed= Total distance/ Total time
= 2s / (3.4s/2.53)
= 1.48 m/s
Therefore, the average speed of the whole journey is 1.48 m/s.
If one light bulb burns out in a string of lights, and the rest stay lit, it is reasonable to assume that the lights are wired in
Answer:
Series
Explanation:
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1) Back on the beach the following day, Clay notices that the waves propelling towards the beach have a period of 6 s. If the wave crests are 15 m apart what is the speed at which they are traveling?
2) Barry Manilow is playing a concert. Having purchased your ticket so late you are sitting in the back row 184 m from the stage. If Barry hits a note on his keyboard that has a frequency of 400 Hz, how many full sound wavelengths are there between you and Barry? How much is the time delay between the time the note is played and the time you hear the note?
3) find the frequency of the ultrasonic wave emitted by a bat if it has a wavelength of 0.0085 m
4) A "wave" in a football stadium has a period of 2 seconds. If the crests between these " waves" measure 20 m, what is the speed at which the "wave" is traveling?
Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through?
A. index of refraction
B.index of reflection
C.angle of reflection
D.angle of incidence
Practicing good human relations skills and having a positive attitude will
If you practice good human relation skills then you will be more happy, be open, talk more, you will think more positive and a lot more. (these are just some examples)
Hope this will help someone! ;)
that which travels in waves that are not the same length is called
Saturn's moon Mimas has an orbital period of 82,800 s at a distance of 1.87x10^8m from Saturn. Using m central m= (4n^2d^3/GT^2) 1 determine Saturn's mass.
Determine Saturn's mass by rearranging Newton's version of Kepler's Third Law.
Answer:
[tex]5.65\times 10^{26} kg[/tex]
Explanation:
From Kepler's third law: Mass of the planet is given by:
[tex] M = \frac{4\pi ^2d^3}{GT^2}[/tex]
where, T is the time period of satellite revolving about the planet at a distance d. G is the gravitational constant = 6.67 × 10⁻¹¹ Nm²/kg²
Given, d = 1.87 × 10⁸ m
T = 82800 s
⇒[tex] M = \frac{4\pi ^2 (1.87\times 10^8)^3}{(6.67\times 10^{-11})(82800)^2}=5.65\times 10^{26} kg[/tex]
An object is attached to a vertical spring and bobs up and down between points a and
b. where is the object located when its kinetic energy is a minimum?
When two pulses meet up with each other while moving through the same medium, they have a tendency to bounce off each other and return back to their origin?
An electron is projected vertically upward with a speed of 1.70 ✕ 106 m/s into a uniform magnetic field of 0.320 t that is directed horizontally away from the observer. describe the electron's path in this field when viewed from above.
The path of the electron is 30.2μm
Data;
speed = 1.70x10^6 m/smagnetic field = 0.320TCharge of an electron = 1.60x10^-19 Cmass of an electron = 9.1x10^-31 kgThe radius or path of the electronThe path of the electron is circular and the radius can be calculated with the help of centripetal force.
[tex]qvB = \frac{mv^2}{r} \\qB = \frac{mv}{r}\\ r = \frac{mv}{qB} \\[/tex]
Let's substitute the value and solve.
[tex]r = \frac{mv}{qB}\\r = \frac{9.10*10^-^3^ * 1.70* 10^6}{(1.60*10^-^1^9 * 0.320}\\r = 3.02*10^-5\\r = 30.2 \mu m[/tex]
The path of the electron is 30.2μm
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Final answer:
The path of an electron projected upward into a horizontal magnetic field, when viewed from above, forms a circular motion due to the magnetic force acting as a centripetal force. The electron will circulate clockwise because of its negative charge.
Explanation:
An electron is projected vertically upward with a speed of 1.70 × 106 m/s into a uniform magnetic field of 0.320 T that is directed horizontally away from the observer. When an electron moves through a magnetic field perpendicular to the direction of the field lines, it experiences a magnetic force perpendicular to both the field and its velocity. This force acts as a centripetal force and causes the electron to move in a circular path.
Since the magnetic field is horizontal and the electron is projected upward, the magnetic force will cause the electron to circulate in a plane perpendicular to the magnetic field. When viewed from above, the path of the electron will be a circle.
It's important to note that the direction of the force and thus the direction of the circular motion depends on the fact that the electron has a negative charge. According to the right-hand rule, as the electron is projected upward, the force will be directed to the observer's left, causing the electron to circulate clockwise when viewed from above.
Difference between duracell and interstate golf cart batteries
Final answer:
The Duracell and Interstate brands offer golf cart batteries with differences in performance, battery life, and maintenance needs. While Duracell is known for reliable and long-lasting power, Interstate emphasizes build quality and has a strong support network. The choice depends on user preferences and cart compatibility.
Explanation:
The Duracell and Interstate brands offer golf cart batteries, with distinctions that can influence a consumer's choice. Duracell batteries are known for their long-standing reputation in battery reliability and performance. They typically provide a range of batteries for various applications, including golf carts, with attention to long-lasting power and durability. On the other hand, Interstate batteries boast top-quality construction and are also very reliable, with a strong presence in the automotive battery market. Consumers may find differences in the specifications such as battery life, maintenance requirements, performance under varying conditions, and price between the two brands.
When choosing between Duracell and Interstate golf cart batteries, one should consider factors such as the type of battery (flooded lead-acid vs. AGM), capacity, cycle life, maintenance needs, and warranty offered by the manufacturer. Duracell generally offers a reliable and consistent performance, while Interstate emphasizes build quality and has a strong distribution network for customer support. Ultimately, the decision should be based on the specific needs and preferences of the user, as well as the compatibility with their golf cart model.
What is the power generated by a 45 kg person who walks up a flight of 12 stairs, each 30 cm high, in 12 s?
A.13.5 W
B.132.3 W
C.1,350 W
D.13,230 W