Gamma rays
each section of the electromagnetic spectrum has characteristics energy level, wavelength and frequencies association with it's photons
Two runners start at the same point and jog at a constant speed along a straight path. Runner A starts at time t = 0 s, and Runner B starts at time t = 2.5 s. The runners both reach a distance 64 m from the starting point at time t = 25 s. If the runners continue at the same speeds, how far from the starting point will each be at time t = 45 s?
Answer:
See explanation below
Explanation:
First thing to do here, is to calculate the speed of each runner. The problem states that both runners jog at a constant speed. We are given data for both runners, the starting time and the time where both of them reach the same distance.
With these data we can calculate the speed of both runners. Let's do it with runner 1:
If by t = 25 s it reach a 64 m of distance, then his speed:
V = d/t (1)
Replacing we have:
V₁ = 64 / 25 = 2.56 m/s
With this speed we can calculate the distance at t = 45 s so:
d = V * t (2)
d₁ = 2.56 * 45
d₁ = 115.2 mSo Runner 1 will be at 115.2 from the starting point at 45 seconds.
For runner 2, he began at t = 2.5 s, but he reach the 64 m at 25 s, so his speed would be:
V₂ = 64 / (25-2.5) = 2.84 m/s
And the distance at t = 45 s
d₂ = 2.84 * 45
d₂ = 127.8 mRunner 2 is 127.8 m from the starting point at 45 seconds.
Hope this helps
WHICH ONE!!! ASAP FOR A RETAKE FOR SCIENCE PLS
Calculate the percentage increase in speed of the cyclist when the power output changes from 200 W to 300 W.
Answer:
50%
Explanation:
Given
Initial power = 200W
Final power = 300W
Increment = 300 - 200 = 100W
percentage increase = increment/initial power * 100
percentage increase = 100/200 * 100%
percentage increase = 0.5 * 100
percentage increase = 50%
Hence the percentage increase in speed is 50%
If an object has a density of .7 it will float . true or false
Answer:
If your basis is water, then yes. It will float because thw density of water is 1. Anything lower than 1 will float ON WATER but anything higher than 1 will sink.
How does each new lightbulb affect the others
Answer:
it gives people light
Explanation:
the light bulb is very important and if it affects other because it gives us light and we need light for tons of stuff
PLEASEEE HELP Write a few sentences- addressing this prompt. Is this a true statement? Exlpain Why or why not.
Summer occurs in the Northern Hemisphere at times in the Earth's orbit when the northern axis of Earth is tilted toward the Sun.
WHAT- HOW WAS THIS NOT ACADEMIC? IT WAS A QUESTION ABOUT WHY BLACK HOLES ARE INVISIBLE LOL.
Answer:
brainly getting too strict smh...
Explanation:
The force of friction between an object and the surface upon which it is sliding is 14N and the coefficient of friction between them is 0.72. What is the weight of the object?
Answer:
Explanation:
Given parameters:
Acceleration = 0.0m/w
Initial velocity = 0m/s
Final velocity = 00m/s
Unknown:
Distance traveled = ?
Solution:
To solve this problem, we use the expression below:
q0 = y + 0w
W is the final velocity
Y is the initial velocity
C is the acceleration
P is the distance
0² = 0² + (0 x 0.0 x S)
000 = 00.0S
S = 0m
Match the atom to the number of electrons it is likely to gain/lose.
1. Sodium (Na)
A. lose 1
2. Oxygen (0)
B. lose 2
3.Aluminum (AI)
C. lose 3
4. Beryllium (Be)
D. gain 3
5 Nitrogen (N)
E. gain 2
6. Chlorine (CI)
G. gain 1
Answer:
Na: lose 1
O: gain 2
Al: lose 3
Be: lose 2
N: gain 3
Cl: depends on the limit of your study im grade nine and the energy level M can hold only eight electrons so i would have answered (gain 1)
2. Does a solar cell always maintain the potential across its terminals
constant? Discuss.
Answer:
hi
Explanation:
will give brainliest to correct answer.
A particle has a charge of 1.9x10-6C. What is the charge on a second particle if the electrical force acting on it is 25N at a distance of 0.32m away?
Answer:
1.5x10^-4C
C=Couloumb's
Explanation:
Expression for the electric force between the two charges is given by -
F = (k*q1*q2) / r^2
Here, k = constant = 9 x 10^9 N*m^2 / C^2
F=25N
q1 = 1.9x10^-6 x 10^-6 C
q2 = ?
r = 0.32m
Substitute the given values in the above expression -
25N= 9x10^9 *1.9x10^-6 *q2 / 0.32m^2
25N= 17,100*q2 / 0.1024m
Next part is algebra multiply both sides by 0.1024 to remove denominator
2.56=17,100*q2
Divide both sides to isolate q2
q2= 1.5x10^-4C
A man travels 9 units to the right and then 11 units to the left find the displacement and distance travelled
Answer:
Displacement = -2 units and Distance = 20 units
Explanation:
It is given that,
A man travels 9 units to the right and then 11 units to the left.
We need to find the displacement and distance traveled.
Let the left side is negative and the right side is positive.
Displacement = -11 + 9
= -2 units
Distance = 11 units + 9 units
= 20 units
Hence, the displacement and distance travelled is (-2 units) and 20 units.
Pre-questioning identifies a purpose for reading.
Please select the best answer from the choices provided
OT
O F
help pleaseeeee !!
Answer:
True
Explanation:
Pre-questioning may help a reader focus on information s/he hopes to find in the reading selection.
Answer:
True!!
Explanation:
I took the practice thing on edge :))
What is the relationship between the horizontal and vertical components of velocity for a projectile launched
Answer: The horizontal velocity of a projectile is constant (a never changing in value. The vertical velocity of a projectile changes by 9.8 m/s each second.
Explanation: I hope that helped!
Now it's your turn
6
A golfer hits a ball of mass 45 g at a speed of 40 m 5-1 (Figure 4.15). The golf club is
in contact with the ball for 3.0 ms. Calculate the average force exerted by the club on
the ball.
Answer:
The average force the golf club exerts on the ball is 600 N
Explanation:
Newton's second law of motion states that force, F, is directly proportional to the rate of change of momentum produced
F = m× (v₂ - v₁)/(Δt)
The given parameters of the motion of the ball are;
The mass of the ball, m = 45 g = 0.045 kg
The initial velocity of the ball, v₁ = 0 m/s
The speed with which the ball was hit by the golfer, v₂ = 40 m/s
The duration of contact between the golf club and the ball, Δt = 3 ms = 0.003 seconds (s)
By Newton's law of motion, the average force, 'F', which the golf club exerts on the ball is therefore, given as follows;
F = 0.045 kg × (40 m/s - 0 m/s)/(0.003 s) = 600 N
The average force the golf club exerts on the ball = F = 600 N.
Sheila has just arrived at the airport and is dragging her suitcase to the luggage check-in desk. She pulls on the strap with a force of 190 N in horizontal way and she displaces it 45 m to the desk. Determine the work done by Sheila on the suitcase.
Answer:
8550 J
Explanation:
Recall that the work performed is the product of the force applied times the distance covered in the same direction of the force. Therefore, for the values given, we have:
Work = 190 N * 45 m = 8550 J
A car goes from rest to a speed of 25 m/s in 10 seconds. What is the car's average acceleration in m/s2?
Answer:
2.5m/s^2
Explanation:
to answer this question the best method would be to use SUVAT equations (attached)
here we have:
U= 0ms
v=25ms
t=10sec
a=?
the best equation to use in this instance is
v = u + at
substitute in the known values:
25=a10
25/10=a
2.5m/s^2 =a
Briefly describe the difference between the behaviorist, nativist, and interactionist language acquisition theories.
Answer:
Described below
Explanation:
- The behaviorist theories: This theory is of the claim that language is learned through the means of reinforcement and imitation. This means that little children can mimic the language of individuals around them and also receive reinforcement to correct the formation of their words. Thereafter, words not reinforced will eventually no longer be in use.
- The nativist theories: This theory is of the claim that individuals possess an innate process which is used in language learning and is widely known as "language acquisition device" (LAD). This device is used to assist in helping them automatically learn languages.
-The interactionist theories: This theory is of the claim that innate processes which is also referred to as genetic predispositions and learning experiences from the environment both help in language development.
The behaviorist theory posits that infants learn oral language through imitation, rewards, and practice.
It should be noted that human role models in an infant's environment provide the stimuli and rewards.
Nativist theories state that language is an innate fundamental part of the human genetic make-up and it is a natural part of the human experience. Children have language-specific abilities that assist them as they work towards mastering a language.
The interactionist theories states that innate processes help in language development. It states that children can only learn language from the people who want to communicate with them.
Read related link on:
https://brainly.com/question/9032544
17.
Kinetic Energy (1)
Velocity (m/s)
Potential Energy (1)
100
0
0
inverse
80
20
4.5
60
40
6.3
linear
40
60
7.7
20
80
8.9
rational
0
100
10
parabolic
The relationship between Potential Energy and Kinetic Energy can be described as
which of the following?
CLEAR ALL
Answer:
I don't know this answer at all
Explanation:
I don't know about these problems
If a spring has a spring constant of 0.5 n / M and it is stretched 0.5 M, what is the force of the spring?
Answer:
the spring would end up being 10.0 n/ M
The wavelength of a particular wave on the ocean is 5 meters. The
wave travels at a velocity of 10 m/s.
What is the frequency of this water wave in Hertz?
Answer:
node jaer le cotenidonv
Explanation:
escirbloa em cuietw n bl********
I need help on the data section of the circuit design lab on Edg.
I hope it's not too late, but here you go
Identify how scientists use radioactive isotopes by selecting the best answers from the drop-down menus. Archaeologists use radioactive isotopes to . Scientists use radioactive isotopes in agriculture to
Answer:
In order to determine or find out about the age of archaeological finds such as fossils, rocks, etc., archaeologists use radioactive isotopes in a process called radioactive dating.
In agriculture, radioactive isotopes have a lot of uses. These comprise of but are not limited to the following:
Improvement of food cropspreservation of food, Establish and estimate the presence and volume of water in the soil for farms;Hormonal analysis for animals (livestock) etcExplanation:
C-14 and Phosphorus - 32 are examples of Radioactive isotopes. Because they decay over time, they are easy to use when it comes to radioactive dating.
When an isotope carried an unstable amount or number of atoms, neutrons, and protons, they are said to be Radioactive. It also means that they have too unstable or excess energy in their nucleus. This condition causes them to decay faster than their stable relatives.
In archaeology, dating the artifacts that are discovered is important because it helps to establish the correct relationship between one find or artifact and another. Because humans can't go back in time, one of the ways to know what humans did or didn't do, or what events occurred in a place by other living things is the items/evidence they left behind. Categorizing these times/artifacts by date helps to give a clearer picture of what happened in a particular block of time and this is exactly what dating is all about.
In agriculture, one of the radioactive isotopes used is Phosphorus - 32.
When the plant's uptake of fertilizer from the roots to the leaves needs to be established, Phosphorus-32 is utilized. A fertilizer that has already been mixed with the above radioactive isotope is administered to the plant using a hydroponic system or via the traditional means (water in the soil). The phosphorus 32 emits beta radiation which is then tracked and mapped accordingly.
Cheers
Answer:
1. C (determine the age of ancient artifacts)
2. A (understand the biological and chemical processes in plants)
3. B (determine the age of rocks and fossils)
Explanation:
The other guy didn't quite give a clear answer so I might as well help some people.
Light strikes a smooth wooden tabletop. What happens to the light after it is reflected?
O The light rays bounce off the table and all move in the same direction.
O The light rays bounce off the table and move in different directions.
O The light rays pass through the table and all move in the same direction.
O The light rays pass through the table and move in different directions.
Answer:
The light rays bounce off the table and all move in the same direction is answer.
Explanation:
I hope it's helpful!
Answer:
A. The light rays bounce off the table and all move in the same direction.
Explanation:
Hi.
I need help with this question :
A piece of copper of mass 40g at 200°C is placed in a copper calorimeter of mass 60g containing 50g of water at 25°C. Ignoring heat losses, what will be the final temperature of the mixture.
(Specific heat capacity of copper= 0.4J/g/K, specific heat capacity of water= 4.2J/g/K )?
Please show workings.
Let the final temperature be "T".
For the piece of copper :
mass, [tex]\sf{m_c=40\ g.}[/tex]specific heat capacity, [tex]\sf{c_c=0.4\ J\,g^{-1}\,K^{-1}.}[/tex]initial temperature, [tex]\sf{T_c=200^{\circ}C.}[/tex]Then the heat of copper :
[tex]\sf{\dashrightarrow Q_c=m_cc_c\,\Delta\!T_c}[/tex]
[tex]\sf{\dashrightarrow Q_c =16(T-200)\ J}[/tex]
For copper calorimeter :
mass, [tex]\sf{m_{cc} =60\ g.}[/tex]specific heat capacity, [tex]\sf{c_{cc} =0.4\ J\,g^{-1}\,K^{-1}.}[/tex]initial temperature, [tex]\sf{T_{cc} =25^{\circ}C.}[/tex]Then the heat of copper calorimeter :
[tex]\sf{\dashrightarrow Q_{cc} =m_{cc}c_{cc}\,\Delta\!T_{cc}}[/tex]
[tex]\sf{\dashrightarrow Q_{cc} =24(T-25)\ J}[/tex]
For water :
mass, [tex]\sf{m_w=50\ g. }[/tex]specific heat capacity, [tex]\sf{c_w= 4.2\ J\,g^{-1}\,K^{-1}.}[/tex]initial temperature, [tex]\sf{T_w=25^{\circ}C.}[/tex]Then heat of water :
[tex]\sf{\dashrightarrow Q_w=m_wc_w\,\Delta\!T_w}[/tex]
[tex]\sf{\dashrightarrow Q_w=210(T-25)\ J}[/tex]
By energy conservation, the sum of all these energies should be zero as there were no heat energy change before the process, i.e.,
[tex]\sf{\dashrightarrow Q_c+Q_{cc}+Q_w=0}[/tex]
[tex]\sf{\dashrightarrow16(T-200)+24(T-25)+210(T-25)=0}[/tex]
[tex]\sf{\dashrightarrow 250T- 9050=0}[/tex]
[tex]\sf{\dashrightarrow T=36.2^{\circ}C}[/tex]
[tex] \large \underline{\underline{\boxed{\sf T=36.2^{\circ}C}}}[/tex]
____________________________
[Note: in case of considering temperature difference it's not required to convert the temperatures from [tex]\sf{^{\circ}C}[/tex] to K or K to [tex]\sf{^{\circ}C}[/tex].]
If a person throws a wiffel ball and a tennis ball with the same speed, which object would travel with more kinetic energy?
Answer:
The tennis ball
Explanation:
It will have more kinetic energy because the tennis ball is more heavier than a wiffle ball. Furthermore, objects that are heavy will have more kinetic energy than objects that are light. Therefore, the tennis ball is the correct answer.
HELP ME PLEASE I WILL GIVE BRAINLIEST
11 The net force on a vehicle that is accelerating at a rate of 1.5 m/s? is 1.800 newtons. What is
the mass of the vehicle to the nearest kilogram?
Answer:
1200
Explanation:
a = 1.5 m/s2
F = 1800N
M =?
F = Ma
M = F/a = 1800/1.5 = 1200Kg
Question 15 When moving oxidation numbers down as subscripts in an ionic bond, do you include the charge (+/-)?
A)Yes
B) Depends on the element
C)No
D)Depends on how large the compound is Previous
Answer:
C)No
Explanation:
When moving oxidation numbers down as subscripts in an ionic bond, you do not include the charge either positive or negative.
The process of moving oxidation number down as subscript is known as exchange of valency.
The combining power is used in exchanging valency and this is oxidation number exchanged. The number corresponds to the number of electrons usually lost or gained or shared by atoms of elements during chemical combination or the number of positive or negative charges carried by ions.
The combining power is exchanged as simple whole number ratio during the formation of chemical formulae of compounds.
2.0 L of a gas is heated from 20.0°C to 80.0°C at constant pressure. What is the new volume?
Answer:
The new volume will be = 2.41L
Explanation:
V1 = 2L
V2 = ?
T1 = 20⁰C = 293K
T2 = 80⁰C = 353K
From Charles law V is directly proportional to T
V1/V2 = T1/T2
V2 = (V1×T2)÷T1
just make substitution yourself
What is a living organism? Give a few examples.
Please help! Own words please!
Will mark brainliest!
Answer:
It's a individual form of life. Examples of this are bacterium , protists and fungus
