Answer:
5
Explanation:
Using the formula
Number of images = 360/theta - 1
theta is the angle of inclination
Given
Theta = 60°
Substitute
Number of images = 360/60 -1
Number of images = 6-1
Number of images = 5
Hence the number of images formed is 5
A negative charge of - 0.0005 C exerts an attractive force of 9.0 N on a second charge that is 10 m away. What is the magnitude of the second charge?
Answer:
q₂ = 0.0002 C
Explanation:
Given that,
Charge, q₁ = -0.0005 C
The force between two charges, F = 9 N
The distance between charges, d = 10 m
We need to find the magnitude of the second charge. The force acting between two charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}\\\\q_2=\dfrac{Fr^2}{kq_1}\\\\q_2=\dfrac{9\times (10)^2}{9\times 10^9\times 0.0005}\\\\q_2=0.0002\ C[/tex]
So, the magnitude of the second charge is 0.0002 C.
A spring has a spring constant of 800 N/m. How much work must be done to stretch the spring 0.4 m from its unstretched position?
A. 64.0 J
B. 160.0 J
C. 320.0 J
D. 640.0 J
Answer:
A. 64.0 J
Explanation:
Given parameters:
Spring constant = 800N/m
Extension = 0.4m
Unknown:
Work done = ?
Solution:
The work done in a string is given as:
Work done = [tex]\frac{1}{2}[/tex] x 800 x 0.4² = 64J
Calculate the exerted on the heel of a boy's foot if the boy weighs 320N and he lands on one heel which has an area of 0.15m squared
Mujhe nhi pata sorry. Lekin mai bhut logo ko jaanti hoon jo iss savaal ka jawaab de sakte hai.
Please Help Me!!!...........
The model above shows sunlight that is directly hitting one side of the earth during its winter season. Which sentence explains why this area is experiencing shorter hours of daylight
Answer:
During winter time the northern hemisphere leans away from the sun due to the rotation of earth and due to this change the sunlight is not direct on these areas instead it is spread and due to this the shadows are longer and the sunlight is not intense. The earths rotation around the sun causes the seasons to change and that is why we experience shorter hours of daytime.
Explanation:
During winter time the northern hemisphere leans away from the sun due to the rotation of earth and due to this change the sunlight is not direct on these areas instead it is spread and due to this the shadows are longer and the sunlight is not intense. The earths rotation around the sun causes the seasons to change and that is why we experience shorter hours of daytime.
A car has a mass of 1000 kg and a momentum of 12 000 kg m / s.
What is its kinetic energy?
Answer:
It's 7.2 x 10^10
I got that because I've put that into the calculator
but just transform it into a standard form = 72000000000
Helpppp! This assignment is due in 15 minutes . Click the photo attached.
Answer:
1: 6.637e-13 N
2: 6.637e-09 N
3: 1.335e-08 N
4: 1.335e-08 N
5: 1.456e-06 N
6: 5.839e-07 N
7: 6.673e-11 N
I'd suggest double checking these if you can.
Explanation:
Each of these you can answer by plugging the numbers into the equation
[tex]F = G\frac{m_1 m_2}{r^2}[/tex]
G is the gravitational constant 6.673×10⁻¹¹ N m² / kg²
So the first one would be:
[tex]F = 6.673 \times 10^{-11} \frac{Nm^2}{kg^2} \times\frac{1kg\times 1kg}{(10m)^2}\\F = 6.673 \times 10^{-11} N \times\frac{1}{100}\\F = 6.673 \times 10^{-13}N[/tex]
I'm not going to run through showing all calculations for the rest, as you're in a rush, so to whip through them
2: 6.637e-09 N
3: 1.335e-08 N
4: 1.335e-08 N
5: 1.456e-06 N
6: 5.839e-07 N
7: 6.673e-11
Pardon the lack of superscript, I just punched these into a python console to calculate them.
In an atom, an electron that is close to the nucleus is on the highest energy level.
Please select the best answer from the choices provided
T
F
Help!!! i'll mark brainliest
If I stretch a standard rubber band (mass of 0.01 kg, spring constant of 40 N/m) 0.25 meters, how high would it launch into the air?
Answer:
You have a hooks law problem F=kx Where F= (40 N/m)× (0.25 meters) F= 10 N Hence the force is 10 NAnswer: The answer would be 12.5 m
Compared to yesterday, you did three times the work in one-third the time. To do so, your power output must have been
a. the same as yesterdays power output
b. one-third yesterdays power output
c. three times yesterdays power output
d. nine times yesterdays power output
Answer:
D. nine times yesterdays power output
Explanation:
We know that formula for power with work is;
Power = workdone/time taken
Now, you did three times the work in one-third the time yesterday.
This means that;
Work yesterday; W_yesterday = W
Work today; W_today = 3W
Time yesterday; T_yesterday = t
Time today; T_today = t/3
Thus,power today is;
P_today = 3W/(t/3)
P_today = 9(W/t)
Since power output yesterday is W/t, it means you did nine times yesterday's power output.
Answer:
D
Explanation:
Nine times yesterday's power output.
A car is traveling east at a speed of 25 m/s. It then takes
5 seconds to a stop at a red light (final velocity=0 m/s).
What is the acceleration of the car?
Answer:
-5m/s²
Explanation:
Given parameters:
Initial velocity = 25m/s
Time = 5s
Final velocity = 0m/s
Unknown:
Acceleration of the car = ?
Solution
The acceleration of a body is the rate of change of the velocity of the body with time.
Acceleration = [tex]\frac{Final velocity - Initial velocity }{time}[/tex]
So;
Acceleration = [tex]\frac{0 - 25}{5}[/tex] = -5m/s²
The car is decelerating at a rate of 5m/s²
"Younger teens often brag about a lack of sleep, but that usually stops when they get older. Why do you think that is?"
as we grow up we kinda experience some age staging so a teen got a lotta stuff going on they wanna be social active they be working on their popularity. so i guess thats it
how much time would it take for the sound of thunder to travels at a speed of 330m/seconds
How much force is needed to accelerate a 1400-kg car 2 m/s?
Answer:
2800N
Explanation:
Given parameters:
Mass of car = 1400kg
Acceleration = 2m/s²
Unknown:
Force on the car = ?
Solution:
To solve this problem, we use Newton's second law of motion.
Force = mass x acceleration
So;
Force = 1400 x 2 = 2800N
When a physical change in a sample occurs what does not change
Answer:
When a physical change in a sample occurs, composition of the sample does not change. It stays the same. It stays the same. Also, the properties of the sample will still be the same
What type of energy is due to motion potential energy or kinetic energy
Answer:
Kinetic Energy
Explanation:
Potential Energy is where something is building up energy to move.
Answer:
Kinetic Energy
Explanation:
Question 10 of 10 When light passes through a small opening in a barrier, it bends to spread out on the other side of the opening. How does this phenomenon support the wave model of light? O A. It is the result of destructive interference. B. It is the result of the barrier acting as a blackbody radiator. O c. It is the result of diffraction. O D. It is the result of constructive interference. SUBMIT
Answer:
C. It is the result of diffraction
Explanation:
I just took the test
Answer:
C
1.2.5
trust me i just did it
Explanation:
Where does bacteria come from
Answer:
Fugis
Explanation:
dsd
A rocket sled accelerates from 10 m/s to 40 m/s in 2 seconds. What is the average acceleration of the sled?
Answer:
15m/s²
Explanation:
Given parameters:
Initial velocity = 10m/s
Final velocity = 40m/s
Time taken = 2s
Unknown:
Average acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time;
Acceleration = [tex]\frac{Final velocity - Initial velocity }{time}[/tex]
Acceleration = [tex]\frac{40 - 10}{2}[/tex] = 15m/s²
An 8 kilogram cannonball is loaded into a 1000 kilogram stationary cannon. When fired horizontally the velocity of the cannonball is 300 meters per second east. Determine the cannon's recoil velocity.
Answer:
The recoil velocity of the cannon is 2.38 m/s.
Explanation:
Given;
mass of cannonball, m₁ = 8 kg
mass of stationary cannon, m₂ = 1000 kg
initial velocity of the cannonball, u₁ = 300 m/s
initial velocity of the cannon, u₂ = 0
Let the recoil velocity of the cannon, = v
Apply the principle of conservation of linear momentum;
m₁u₁ + m₂u₂ = v(m₁ + m₂)
8(300) + 1000(0) = v(8 + 1000)
2400 = v(1008)
v = 2400/1008
v = 2.38 m/s
Therefore, the recoil velocity of the cannon is 2.38 m/s.
Which object has the most thermal energy?
Answer:
B
Explanation:
The object with the most thermal energy is the choice B. This is because from the given choices, it has the most mass and highest temperature of all the bricks.
Thermal energy is the sum total of the average kinetic energy within the system.
It is mathematically expressed as:
Quantity of energy = mass x specific heat x change in temperature
We see that the quantity of the thermal energy is directly proportional to mass and temperature changes.
Answer:
B. a 4 kg brick at 25 degrees Celsius
Explanation:
did the quiz <3
The term for Italian Opera
Answer:
Opera seria,
Explanation:
Complete the sentence by typing the word that correctly fills the blank Fossil fuels are formed gradually over _______
of years.
Enter your answer
Natural Resources Question 5
Which statement describes an advantage of using renewable
resources?
Select one
-They make energy more affordable
-They will increase the demand for electricity
-They will be available for many years.
-They make electricity less dangerous.
Answer:
-They will be available for many years.
Explanation:
The advantage of using renewable resources is that they will be available for many years.
Renewable resources have very fast turn over time for replenishing, therefore, they are available over an extended period time.
They are not used by consumption and so they will continually be available. This is different from the non-renewable resources which are depleted as they are being used up.
Examples of renewable resources are wind, water and air
Select all that apply.
Check all that characteristics of zebra mussels.
Question 2 options:
the size of a hand
lives in cool water
can attach to any surface
filter feeders
Answer: 1 and 3
Explanation:
Calculate the gravitational potential energy of 3kg book sitting on shelf 4m high
Answer:
i know it i know it pick me
Explanation:
Answer:
nope loser
Explanation:
4. Which problem is most likely to result from the use of nuclear power?
O A. storage of radioactive wastes
B. miners getting trapped underground
C. oil spills that pollute oceans and beaches
O D. pollutants in the groundwater after drilling
Answer:
i think it is A
Explanation
Based on what you have just read, what are the advantages of storing music digitally compared to using an analog system?
Storing music digitally requires less storage room than analog records or tapes. Digital music is easier to copy and the copies are the same as the original. The quality of the signal does not degrade over long periods of time.
Sample Response: Storing music digitally requires less storage room than analog records or tapes. Digital music is easier to copy and the copies are the same as the original. The quality of the signal does not degrade over long periods of time.
A researcher claims to have developed a new drug for treating
patients with asthma. Why is it important for the researcher to
communicate research results to others?
A. so that others can repeat and validate these results
B. so that others can try to prove the researcher's data are wrong
C. so that the results can be published in a journal
D. so that others can share in profits made by selling the
new drug
Answer:
Option A
Explanation:
The answer is option A or "so that others can repeat and validate these results." In order to develop a drug to treat a disease you need to have research and data on what is used in the drug, how much you need to take, and why it's good for the patient to take it. When you share it with other researchers who specialize in that area, they can take that data and repeat it to see if their results are actually correct or valid.
Hope this helps.
A 60 kg skydiver steps out of an airplane. A gravitational force of 588.6N is exerted on the skydiver. 1) calculate the acceleration of the skydiver using Newton's second law a= f/m 2)is the acceleration what you expected
Answer:
9.81m/s²
Yes, the acceleration is as expected because the diver is falling under gravity
Explanation:
Given parameters:
Mass of skydiver = 60kg
Gravitational force = 588.6N
Unknown:
Acceleration of the diver = ?
Solution:
To find the acceleration of the diver, we use the Newton's second law of motion which is expressed as;
Force = mass x acceleration
Acceleration = [tex]\frac{Force }{mass}[/tex] = [tex]\frac{588.6}{60}[/tex] = 9.81m/s²
Yes, the acceleration is as expected because the diver is falling under gravity