Answer: find the answer in the explanation
Explanation:
It is true that the word “radiation" has a negative meaning for many people. Nevertheless there are many uses and significant benefits of radiation to humans. Below are some of the advantages
1.) Its application is useful in Agricultural and scientific research
2.) It is used to induce mutations in plants and animals
3.) It is used in treatment of cancer
4.) It is used to sterilize equipment in hospital and also food.
5.) It is used to study defect in metals and welded joint and to check metal fatigue
6.) It is used to trace underground pipe leakages.
Which statements accurately describe the motion map?
Check all that apply.
-The objects are moving in the same direction
-The objects are moving in opposite directions.
-Object A has a greater velocity than object B.
-Object B has a greater velocity than object A.
-Objects A and B have the same velocity
Answer: B & D
Explanation:
The objects are moving in opposite directions is the statements accurately describe the motion map, therefore the correct answer is option B
What is displacement?An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard. Displacement describes this shift in location.
It is a vector quantity to be displaced. This means that it is visually represented as an arrow that points from the starting position to the ending position and that it has both a direction and a magnitude.
The total distance traveled by an object is different than the total displacement covered by it because the displacement is a vector quantity and it is calculated on the basis of the shortest distance traveled by the body or object.
Thus, The objects are moving in opposite directions is the statements accurately describe the motion map, therefore the correct answer is option B
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Which of the following atoms has the smallest radius?
The Periodic Table
In the table below, which statement would best fill the missing box under “Closed System”? Open System Closed System Matter freely moves Matter does not freely move Energy freely moves Energy is unknown Energy is destroyed Energy does not freely move Energy freely moves
Answer:
energy moves freely
just guessing
Answer:
C: Energy does NOT move freely
Explanation:
a closed system does not allow energy to flow, open systems do.
The electromagnetic waves with the most energy have the greatest
period
b) wavelength
c)
frequency
d) color
Frequency is the amount of times the particle moves back and forth per second, more or less. The more energy, the higher the frequency. At the same time, the more energy means you'll have a shorter wavelength (aka period). Color only applies to the visible spectrum.
Answer:
frequency
Explanation: The greater the number of waves appear the greater the energy. The smaller the number of waves appear the lower the energy.
Frequency is the number of times waves appear.
A horizontal force of 50 N is applied to the object.
Answer:
Mass of object (m) = 5.102 kg
Explanation:
Given:
Horizontal Force (F) = 50 N
Find:
Mass of object (m) = ?
Computation:
We know that, acceleration due to gravity (g) = 9.8 m/s²
⇒ Horizontal Force (F) = mg
⇒ 50 N = m (9.8 m/s²)
⇒ Mass of object (m) = 50 / 9.8
⇒ Mass of object (m) = 5.102 kg
Mass of object (m) is 5.1 kg (Approx)
A frictionless roller coaster (22kg) is at a height h traveling with a speed v0 = 10m / s. Assume that h = 20m. The speed of the car at point B is:
Answer:
3 g
Explanation:
The Theory of General Relativity, proposed by Albert Einstein, has given scientists a way to
understand
_ as it relates to bodies in motion.
(1 point)
matter
entropy
gravity
energy
Is there gravity in space. True False
True. There IS gravity in space. Tons of it.
NEED HELP ASAP!!!!!!!!!!!!!
Which of the following is NOT a side effect of smoking:
Decreased ability to use oxygen
Decreased lung function
Decreased risk of heart attack
Increased asthmatic symptoms
Answer: Decreased risk of heart attack
Explanation:
thats the answer because it actually
increase rish of heart attack
Hope this helps :)
Answer:
the answer is C. It wont decrease your probability of a heart attack it will increase it
Explanation:
As an object falls to the ground, what happens to its energy? Ignore air resistance in this scenario.
A)energy is converted from gravitational potential energy to kinetic energy.
B)energy is converted from kinetic energy to
gravitational potential energy.
C)energy is in motion the whole time.
D)energy gets destroyed due to friction
Answer:
the answer is a
Explanation:
due to it being high and kenetic is in motion
When the object falls to the ground so the option A should be considered for energy.
Impact on energy:In the case when the object falls to the ground, so here the energy should be transformed from the gravitational potential energy to the kinetic energy as both are considered since the objects fallen into the ground.
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When an object rolls over a surface, the kind of friction that occurs is called
friction.
Answer here
Answer:
Rolling Friction
Explanation:
But only write rolling on the blank space
Answer:I miss her
Explanation:
A net force of 400 Newtons acts on a 50kg mass. What is its acceleration?
A 450 m/s/s
B 8 m/s/s
C20,000 m/s/s
D 350 m/s/s
E.125 m/s/s
Explanation:
Formula = F = ma
Where f is force m is mass and a is acceleration
400 = 50a
400/50 = a
8
Option B is the correct answer
Answer:
the answer is B
Explanation: because, force=mass x acceleration, which acceleration=force : mass.
So, acceleration= 400 : 50=8m/s/s :D
hi:) anyone able to explain why it’s easier to lift something on moon compared to earth? thanks:)
Because the moon has much less mass than the Earth has. This makes the gravitational forces between the moon and any object much less than the forces between the Earth and the same object, when the object is the same distance from the center of the moon or the Earth.
To talk about an actual number, we usually talk about being on the surface of the Earth or the moon:
A person or object on the surface of the moon weighs about 17% as much as he/it weighs on the surface of Earth. That's about one-sixth as much. So naturally, it's easier to lift something on the moon than it is to lift the same thing on Earth, because when it's on Earth, it's about six times as heavy.
Which of the following is the most effective relaxation technique?
A.
It varies from person to person.
B.
Deep breathing
C.
Eating right
D.
Exercising
Answer:
A
Explanation:
It varies from person to person.
Answer:
A.
It varies from person to person.
Explanation:
i just look the test
What is the average temperature of the city, 89.6 Fahrenheit, on the Celsius scale?
Answer:
thrity-two degrees Celsius
The wings of a honeybee move at a frequency of 220 Hz. What is the period for a complete wing-beat cycle?
Answer:
0.0045 s
Explanation:
Period = 1 / frequency
T = 1 / (220 Hz)
T = 0.0045 s
Michael is the captain of his school's soccer team. What skill does Michael exhibit when he decides which player will take the penalty kick?
A.
conflict resolution
B.
sportsmanship
OC.
leadership
D.
teamwork
On February 6, 1971, Alan Shepard made history by becoming the first astronaut to play golf on the Moon. Using only one hand to swing the club because of his bulky space suit, Shepard still managed a long drive. Given the lack of an atmosphere on the moon and a gravitational acceleration of 1.6 m/s2, how far would the shot go with an initial velocity of 25 m/s and a launch angle of 35∘?
A. 367 m
B. 375 m
C. 382 m
D. 391 m
Answer:
Horizontal distance travelled by the ball.
A. 367m
Explanation:
Projectile motion is a motion in which an object moves in a parabolic path due to the action of gravity on it. Projectile motion only occurs when there is one force which is applied at the beginning, after that the only interference is from gravity. e.g the path of a golf ball after hit by a golfer.
Range of the projectile can be defined as the horizontal distance given by the ball. We need to find Range in this question.
The Range of a projectile is given by:
[tex]R = \frac{v^2\cdot{sin2}\theta}{g}[/tex]
where
v = initial velocity = 25 m/s
θ = 35°
g = 1.6 m/s²
Substitute the values in formula of R:
[tex]R= \frac{(25)^2\cdot{sin(2\cdot35)}}{1.6}\\R= \frac{(625)\cdot{sin(70)}}{1.6}\\R=367m[/tex]
If 400j of work is done on an object in 8 seconds, how much power does the object experience?
50w
45W
60W
408
Answer:
50w
Explanation:
Power is equal to Energy divided by Time
∆E/t
Answer:
50 W
Explanation:
Power can be found using the following formula.
p=w/t
where w is work and t is time.
400 Joules of work is done on the object in 8 seconds. Therefore,
w= 400 J
t= 8 s
Substitute these values into the formula.
p=400 J/ 8 s
Divide 400 by 8
p=50 J/s
Add appropriate units. In this case, power uses Watts, or W. (1 Joule per second, or J/s is equal to 1 Watt, or W)
p= 50 W
The object experiences 50 Watts of power
Both mechanical and electromagnetic waves
Answer:
transmit energy
Explanation:
hope this helps u stay safe
help me ASAP plzzzzzzzz!!!!!!
Answer:
A long handle
Explanation:
A spanner is basically a wrench, you would also want to use a long handled wrench in order to have more mechanical advantage and be able to apply more torque. This can be proven as well using a simple physics formula:
[tex]t = fd[/tex]
where the variables are:
t = torque
f = applied force
d = perpendicular distance from fulcrum to where the force is applied
It is clear that keeping the applied force constant, if you enlarge the perpendicular distance, d, you will be able to apply more torque and therefore have an easier time releasing this nut.
which of the following best describes a mathematical wave
A: A transfer of energy
B: A movement of matter
C: When energy is converted from one form to another
D: A periodic disturbance of a medium
Answer: D:
A periodic disturbance of a medium
Explanation:
A wave can be Mathematically defined by periodic disturbance of a medium. That is, oscillations of the waves about a fixed position or change in position from the resting equilibrium position. The wave oscillate from equilibrium position with amplitude periodically.
pls help quickly average velocity = u+v/2 or displacement/ total time taken
Answer: Average velocity = u+v/2
Explanation: The definition of velocity is displacement over time taken. That is,
Velocity = displacement/ time taken
But we have initial velocity U and final velocity V. When we are talking about average, we are talking about the mean value of the given parameters.
Therefore, average velocity will be addition of initial velocity and final velocity divided by 2. That is,
Average velocity = (U + V)/2
Explain the process by which cell phones transmit data using energy and waves
Answer:
Radio active waves
Explanation:
It transmits it by invisible waves to connect to internet or to use wireless headphones or wireless charger.
3. What are two common effects of driving on open highways?
A. Speeding and highway hypnosis
B. Fatigue and visual effects
C. Velocitation and fatigue
D. Velocitation and highway hypnosis
Answer:
Explanation:
Special problems: Rural areas can be twice as dangerous as their city counterparts. ... Two common effects of driving on open highways are velocitation and ... Avoid speeding on rural roads or after you exit the freeway by checking your ... for a long period of time, be aware of a condition known as "highway hypnosis".
Driving on wide highways frequently results in velocitation and tiredness. The phenomena of accidentally raising speed on roads as a result of repeated exposure to greater speeds is known as velocitation.
It happens when drivers become acclimated to the faster speeds and may unintentionally go over the speed limit, endangering their safety.
Another frequent impact is fatigue, which can occur as a result of extended lengths of repetitive driving on wide-open highways. Fatigue can make it difficult to focus, respond quickly, and make decisions, which makes accidents more likely.
Despite the fact that highway hypnosis and visual effects can also happen when driving, open roads are uniquely linked to velocitation and weariness.
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Red light has the wavelength of 6.55 X 10 ^-7m. What is its frequency in hertz.
1. 4.58 hz
2. 4.58x10^14hz
3.21.8 hz
4. 2.18x^10-15 hz
Does an apple, potato, and onion all taste the same if you eat them with your nose plugged?
A.) Yes
B.) No
Answer: A yes
Explanation:
Answer:
A) Yes
Explanation:
Majority of what we perceive as "taste" is actually due to our sense of smell.
If we remove the contribution of smell by plugging your nose, many people have reported that apples, potatoes and onions indeed do "taste" the same.
The slope of a velocity versus time graph gives
Explanation:
Average of acceleration
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If you sit close to a campfire, the fire warms you. Describe how thermal energy is transferred from the fire to you.
Answer:
Explanation:
When you sit by a campfire, most of the heat you are receiving from the fire does not come from hot air. ... This radiation carries energy which is converted to heat when it hits another object and is absorbed. In contrast, conduction involves the direct movement of heat through an object.
What is the connection between the force it take to move an object of different masses?
Answer:
Gravity affects weight, it does not affect mass. MASSES ALWAYS REMAIN THE SAME. Newton's Second Law of Motion: Force = mass x acceleration The acceleration of an object is: a) directly proportional to the net force acting on the object
hope this helps u stay safe
Explanation: