Answer:
250s
Explanation:
Given parameters:
Mass = 50kg
Speed = 10m/s
Force = 2N
Unknown:
Time the force was acting = ?
Solution:
To solve this problem, we use the equation of motion from the second law of Newton:
Ft = mV
F is the force
t is the time taken
m is the mass
V is the velocity
2 x t = 50 x 10
t = 250s
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 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
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
HELP ME PLEASE
Which of the following is true about the International Space Station?
A. It is on the surface of Mars.
B. It is the size of ten football fields.
C. It was built from separate parts sent to space.
D. It was a partnership between the US and Soviet Union
Please
Answer:
The answer is C. Its not on mars and its not 10 football feilds its only 1
The International Space Station was built from separate parts sent to space.
What is International Space Station?A sizable spacecraft in orbit orbiting the Earth is called the International Space Station. Crews of astronauts and cosmonauts reside there as a home. The space station serves as an exceptional science lab. The space station was created and used by international cooperation.
The components of the space station were put together by astronauts while they were in space. It travels around 250 miles above Earth's surface on its typical orbit. It has a speed of 17,500 mph. It therefore orbits the planet every 90 minutes. The space station is being used by NASA to learn more about surviving and operating in space. These discoveries will enable sending more people into space than ever before.
For the entire space station, there is no set ownership stake. Instead, each partner should maintain authority and control over the elements it registers and over employees in or on the Space Station who are its nationals, according to Article 5 of the IGA. As a result, only one partner holds sole control of each ISS module. However, the contracts for using the space station's amenities are more intricate.
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A group of students left school at 8:00 am on a field trip to a science museum 90 miles away. Which best describes the average speed of the bus if they arrived at the museum at 10:00 am?
Answer:
45
Explanation:
because the equation for speed is distance divided by time! hope that helps gave a nice day!
The speed of the group of students is their total distance divided by the time taken to travel. The speed to cover 90 miles in 2 hours is 45 miles/hour.
What is speed ?Speed is a physical quantity measuring the distance covered by an object within unit time. Speed is a scalar quantity. The rate of speed is called velocity. The unit of both quantities in common is m/s.
If an object covers more distance within small time, the object is said to have a greater speed. The speed of the object is the ratio of its change in distance to the change in time.
Given that, distance covered by the traveler = 90 miles
time taken = 10 -8 = 2 hours
speed = distance/ time
speed =90 miles /2hrs = 45 mph
Therefor, the average speed of the students is 45 miles per hour.
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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.
what are sound waves?
Answer:
sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain
Answer:
Sound waves travel at 343 m/s through the air and faster through liquids and solids. The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate. The bigger the vibrations the louder the sound.
Explanation:
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The strength of an electrical field decreases as you move farther from the source.
True or False
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
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
The term for Italian Opera
Answer:
Opera seria,
Explanation:
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
How does light travel from our light source? What kind of light is it and what is it made of?
Answer:
light is a form of energy produced by a light source. Light is made of photons that travel very fast. Photons of light behave like both waves and particles
Explanation:
Answer:
it travels through a beam
it's is artificial light ...................
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
Complete the sentence by typing the word that correctly fills the blank Fossil fuels are formed gradually over _______
of years.
Enter your answer
10)A car is moving from rest and attained a velocity of 80 m/s. Calculate the
acceleration of the car after 5 s?
Answer:
initial velocity (u)=0
final velocity (v)=80m/s
time(t)=5s
acceleration (a)=?
Explanation:
we have
v=u+at
80=0+a×5
5a=80
a=80/5=16m/s²
I WILL GIVE BRAINLIEST!! Record the volume of the liquid in the graduated cylinder. The volume of the ------------liquid is milliliters.
Answer:
53 milliliters
Explanation:
Which of the following bonds strength ranks in the correct order?
A. S-S < K-K < K-S
B. Mg-Mg < O-O < Mg-O
C. H-H < Ca-H < Ca-Ca
D. Na-Na < Na-Br < Br-Br
Answer:
the answer is A
Explanation:
The answer is A
The Choice in which the bond Strength ranks in the correct order is Choice A; S-S < K-K < K-S
According to the question;
We are required to determine in which choice Bond strength ranks in the correct order.The bond strength of a bond increases with increasing polarity of the bond.
Evidently, From the options above; In Choice A;
The polarity of S-S < K-K < K-S
As such, the bond strength which ranks in the correct order is Choice A: S-S < K-K < K-S
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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:
earth recycles water through select all that apply
1 distillation
2 precipitation
3 condensation
4 evaporation
5 sequestration
Answer:
evaporation to condensation to precipitation.
Answer:
evaporation to condensation to precipitation.
Explanation:
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.
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.
13. Explain whether the following answers are reasonable or not. Check the magnitude, the units, and the
direction. You DO NOT have to solve the problems yourself.
a) A car speeds up as it enters the freeway. It accelerates at 5.4 m/s? What was the car's final speed?
ANSWER: 6.3 m/s forward
I
Describe how and why molecular movement and position will change when heat is added.
Answer:
the molecules well speed up
Explanation:
Answer: As heat energy is added to the solid, the kinetic energy of the molecules increases and their vibrations speed up. The molecules move farther away from their fixed positions and farther away from each other.
Explanation:
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.
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
A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 seconds. What is the acceleration? 0-13 m/s2 0-6 m/s2 0.6 m/s2 O 13 m/s2
Answer:
6m/s²
Explanation:
Given parameters:
Initial velocity = 35m/s
Final velocity = 65m/s
Time taken = 5s
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time taken;
Acceleration = [tex]\frac{Final velocity - Initial velocity }{time}[/tex]
So;
Acceleration = [tex]\frac{65 - 35}{5}[/tex] = 6m/s²
how much time would it take for the sound of thunder to travels at a speed of 330m/seconds
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:
i. What is the initial velocity of the car?
ii. What is the maximum velocity attained by the car?
iii. Which part of the graph represents zero acceleration?
Answer:
I. 0 m/s
II. 20 m/s
III. Part BC
Explanation:
I. Determination of the initial velocity.
From the diagram given above,
The motion of the car starts from the origin. This implies that the car start from rest and as such, the initial velocity of the car is 0 m/s
II. Determination of the maximum velocity attained.
From the diagram given above, we can see clearly that the maximum velocity is 20 m/s.
III. Determination of the part of the graph that represents zero acceleration.
It important that we know the meaning of zero acceleration.
Zero acceleration simply means the car is not accelerating. This can only be true when the car is moving with a constant velocity.
From the graph given above, the car has a constant velocity between B and C.
Therefore, part BC illustrates zero acceleration.