Radio telescopes beam radio waves into space. To calculate the speed of the radio waves in space, which information, if any, is necessary?
Answer:
No more information is needed
Explanation:
Radio waves are electromagnetic energy, lower frequency forms of this type of energy that includes light and cosmic rays on the high frequency end that we are able to detect. So in free space (vacuum), radio waves travel at their fastest velocity, the “speed of light”. The reason for the quotation marks is because when light or radio waves are propagating through matter, we observe them traveling more slowly.
A student believes a metal rod will gain a negative static charge when
rubbed with a cloth.
Is she correct? Explain your answer.
Answer:
no, when a plastic rod is rubbed with a duster, electrons are transferred from one material to the other. The material that gains electrons becomes negatively charged. The material that loses electrons becomes positively charged.
Explanation:
There is a bell at the top of a tower that is 95 m high. The mass of the bell is 21 kg. What is the potential energy of the bell?
Answer:
19,551 J!
Explanation:
The formula is PE = ham (h=height, a= acceleration or 9.8, m= mass)
PE = (95)(9.8)(21)
PE = 19,551 Joules
what is a variable that gives location relative to an origin?
Answer:
The position variable gives location relative to an origin.
Explanation:
Position (displacement) gives location relative to an origin, but distance does not.
A 50 n force is acting on a lever 1.5 m from the fulcrum balances an object 1m from the fulcrum on the other arm. what is the weight of the object in n and what is the mass in kg
Answer:
A 100 N force acting on a lever 2 m from the fulcrum balances an object 0.5 m from the fulcrum on. ... What is the weight of the object(in newtons)? What is its mass (in kg)? ... mass at the one end and effort arm is the distance between pivot and effort applied at the other end.
Explanation:
hpoe this helps you.
PLEASE HELP THIS IS URGENT!!!!! 50 POINTS!!!
Complete the data table using the procedure above and the video provided. To find the distance from the top of the water column to the top of the air column, subtract the height of the water column from the total distance to the top of the air column. Using the equation v = fƛ, determine the wave speed for each trial. Determine an average wave speed by averaging the wave speeds you found for each trial. To calculate the exact value for the speed of sound, use the temperature given at the beginning of the video and the following equation: Vsound = 331 m/s + 0.6(TCelcius) How close was your average speed to the calculation of the actual value for the speed of sound in m/s? Give 2 examples of errors that may have occurred during the lab that could have caused your value to be different than the value that you determined using the equation.
Answer:
1 wave-153 m/s
2 wave-162 m/s
3 wave-171 m/s
4 wave-175 m/s
5 wave-190 m/s
6 wave-202 m/s
7 wave-223 m/s
8 wave-238 m/s
avg speed-188 m/s
Explanation:
How close was your average speed to the calculation of the actual value for the speed of sound in m/s? Give 2 examples of errors that may have occurred during the lab that could have caused your value to be different than the value that you determined using the equation.
My average is pretty close to the actual value.
2 errors that may occur, are, not adding a temperature, and measuring in sm instead of m.
Hope it helps, i got 100 percent on my assigment with this answer.
Which of the following electrical components is a temporary electrical energy storage device?
- Capacitor
- Transistor
- Resistor
- Fuse
Answer:
A capacitor
Explanation:
Because it can store electric energy when disconnected from its charging circuit. Commonly used in electronic devices to maintain power supply while batteries change.
Hope this helps! :)
What would a series circuit be used for?
A. to power a battery
B. to light a lamp
C. as a voltage divider
D. convert chemical energy to thermal energy
Answer:
C
Explanation:
a series circuit would be an odd choice to power a battery or light a lamp when a direct would be much more efficient, and it's not converting types of energy, so C is the best possible answer
Fari & Olaya are standing at the top of a hill at the same height. An observer stated that 'Olaya has gained more Gravitational Potential energy than Fari.
How can you justify this statement on the basis of two physical quantities (weight & height) Gravitational Potential energy depends upon?
Answer:
olaya weighs more than fari
Name two individual team sports that you have participated in at some time. Did you play mainly for exercise, fun, or competition?
Answer:
Table tennis and tennis
Explanation:
Tennis and table tennis.
While two of them have tennis in their names, they're actually both different and very well so.
Tennis is a bigger version of table tennis that takes place on a land. It's usually played in a court, outside, or even inside some sports center.
On the other hand, table tennis is a "low level tennis". It takes place on a table, like its name implies, it is played in a table. Table tennis is usually played for a shorter when compared with tennis but they have a lot of things in common
The density of a substance can be found with the help of:
A stationary, 32 kilogram ice skater catches a 0.5 kilogram snowball thrown at a speed of 45 meters per second. The collision is totally inelastic. How fast, in meters per second, does the skater (and snowball) move afterward? Friction of the skater on the ice is negligible.
Answer:
V = 0.69 m/s
Explanation:
Given that,
The mass of a ice skater, m₁ = 32 kg
The initial speed of the ice skater, u₁ = 0
Mass of a snowball, m₂ = 0.5 kg
The initial speed of a snowball, u₂ = 45 m/s
eIt is mentioned that the collision is totally inelastic. Let V be the common speed of skater and the ball. So, using the law of conservation of momentum.
[tex]m_1u_1+m_2u_2=(m_1+m_2)V\\\\V=\dfrac{m_1u_1+m_2u_2}{m_1+m_2}\\\\V=\dfrac{32\times 0+0.5\times 45}{32+0.5}\\\\V=0.69\ m/s[/tex]
So, the common speed is equal to 0.69 m/s.
In the nuclear equation:
222 86 Radon becomes 4 2 Helium plus blank.
The characteristics of the missing particle are ________________.
Z = 84, A = 220
Z = 88, A = 218
Z = 84, A = 218
Z = 85, A = 220
Answer:
C
Explanation:
Z = 84, A = 218
trust, got a 100 :)
Name one metal and one non-metal from the periodic table?
Y’all I need help
Thank you!
Answer:
Zinc and Neon!
Explanation:
zinc is an element that is a transition metal and neon is a noble gas
2. A hit used on a ball below the shoulders
1. Bump
2. Set
3. Serve
4. Spike
Answer:
Bump
Explanation:
Also called the forearm pass; An underhand pass hit with your forearms when the ball is below your shoulders; used to receive the serve.
The cricket player while catches the ball wears gloves and why
Answer:
the ball is travelling very fast and the player can get injured if he doesn't wear gloves
Explanation:
please help lol will mark brainliest
Answer: im thinking its the first choice >_< im so sorry ifits wrong (35,45300)
Explanation: im really sorry if this is wrong im really really really sorry im really sorry
perfect square of 11650
Answer:
Since the area of the perfect square is 11650, and all of a squares sides ar equal, we just need to find the square root.
The square root of 11650 is 107.935166.
One side of the square is 107.935166
107.935166 x 107.935166 = 11650
(っ◔◡◔)っ ♥ Hope It Helps ♥
Answer:
107.94
Explanation:
Take the square root of 11650
pls help will mark brainliest
which is a dopant for a p-type semiconductor?
a. arsenic
b. indium
c. phosphorus
d. antimony
HELP MEEE
Resonance occurs in the middle ear.
Please select the best answer from the choices provided
T
F
Answer:
The answer should be True, but it's False on Edge 2021
Explanation:
이것이 도움이 되었기를 바랍니다.
(✿◡‿◡)
#LearnWithBrainly
-Jiyen~
what is power, and what is its relationship to voltage and amperage?
Help me please please
answer a makes the most sense.
hope this helps
Think about the sound waves and light waves that are transmitted when you use a computer, watch TV, or use your phone. How are these waves similar? How are they different?
Answer:
Light and sound waves are different in the sense that:
Light can travel without a medium, and is a physical particle
Sound is a vibration in a medium
Light can be altered by a different medium
Same with sound
Explanation:
There's no answer list, but here are some answers.
A 5kg bowling ball is rolling with 75kg*m/s. How fast is it going?
Answer:
you are going 1 mile per hour depending on how fast
Explanation:
1. A wave on a rope has a wavelink of 2.0m And a frequency of 2.0 Hz. What is the speed of the wave?
2. If 10 waves pass by a dark on a lake every 16.0 seconds, What is the frequency of the wave?
3. What is the wavelength of an Earthquake wave if it has a speed of 5.0 km/s and a frequency of 10Hz?
4.The speed of light is 3.0 X 10^8 m/s. Red light has a wavelength of 7.0 X 10^-7 m. What is the frequency of red light?
5. And ocean waves moving towards the shore at a speed of 5m/s. If the frequency is 2.5Hz, what is the wavelength of the wave?
Plzzzzzzz help!!!
Answer:
1.
2.
3.500
4.
5. 2
Explanation:
will do rest later
PLEASE HELP!!!!!!!!!!!!!!!!
Which has more momentum, 3.0 kg mass moving at 4.2m/s [N] or a 1.5 kg mass moving at 8.5 m/s [N]?
Answer:
The answer of this question is
Explanation:
1.5 kg mass moving at 8.5 m/s (N).
Plz don’t send me link over what the answer is just tell me. What force is represented by the vector?
A. friction
B. gravity
C. normal force
D. push
Answer:
B. gravity
Explanation:
The ball if moving down so gravity is acting on it because it is pulling it down to earths toward the center of earth aka the ground.
In a race, a car travels 60 times around a 3.6km track. This takes 2.4 hours. What is the average speed of the car?
Answer:
multiply
Explanation:
multiply
Answer:
90km/h
Explanation:
When an object slides,there is less friction than when it rolls
Answer:
False
Explanation:
Rolling friction takes place when an object rolls on the surface. Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them.