Answer:
1 ms-²
Explanation:
v = u + at
25 = 15 + a× 10
a= 1ms-²
What is the experimental group(s)?
A. The group(s) that represents the normal conditions.
B. The group(s) that gets the special treatment
A cathode ray tube is made of glass with a small amount of some kind of gas in it. It has metal electrodes at each end to pick up an electric current. The electrodes are named "positive” and "negative,” which were words used by Benjamin Franklin in the 1700s to describe electricity. A bright ray forms in the gas when an electric current is applied to metal electrodes. In the 1800s, an important scientist suspected that the negatively charged particles in a cathode ray were present in all atoms
Answer:
Make cathode-ray tubes with various materials and see whether the beam should be the same.
Explanation:
Cathode ray tube seems to be a transverse wave or vacuum tube throughout which the electron beam becomes transmitted onto a phosphor-coated panel to create a luminous position at that same point on a surface established either by influence on the electron beam of the varying magnetic field inside the container.This beam flowing from either the negative (-) charge portion including its vacuum (cathode) to something like the positive (+) charges plate (anode).what is the SI unit of a force
Answer:
The So unit of force is the newton,symbol N. the base units relevant to force.
Answer
the SI unit of force is newton
When a marble is at rest what happened
Answer: the marble will remain in place at a constant velocity of zero
Explanation:
Newton's first law states that a body at rest will remain at rest, and a body in motion will remain in motion in a straight line at a constant velocityunless acted upon by an outside force
What is the net force exerted by these two charges on a third charge q3 = 54.5 nC placed between nC and nC at x3 = -1.145 m ? Your answer may be positive or negative, depending on the direction of the force.
Answer:
[tex]-4.74*10^{-5}\ N[/tex]
Explanation:
Consider two point charges located on the x axis: one charge, q1 = -19.5 nC , is located at x1 = -1.670 m ; the second charge, q2 = 34.0 nC , is at the origin (x=0).
Given that:
q1 = -19.5 nC , x1 = -1.670 m, q2 = 34.0 nC , x2=0, q3 = 54.5 nC, x3 = -1.145 m
From Coloumbs law, the force between two charges is given by the formula:
[tex]F=k\frac{q_1q_2}{d^2}\\ \\Where\ k=\frac{1}{4\pi \epsilon_o}=9*10^9\ Nm^2/C^2 ,\epsilon_o=8.854*10^{-12}\ C^2/Nm^2\\d=distance\ between\ charges[/tex]
Hence the force of attraction of q1 on q3 is given by:
[tex]F_{13}=k\frac{|q_1q_3|}{(x_3-x_1)^2}=9*10^9(\frac{|-19.5*10^{-9}*54.5*10^{-9}|}{(-1.145-(-1.670))^2} )=3.47*10^{-5}\ N[/tex]
Hence the force of attraction of q2 on q3 is given by:
[tex]F_{23}=k\frac{|q_2q_3|}{(x_3-x_2)^2}=9*10^9(\frac{|34*10^{-9}*54.5*10^{-9}|}{(-1.145-0)^2} )=1.27*10^{-5}\ N[/tex]
The force of attraction of q1 on q3 is in the negative direction and force of attraction of q2 on q3 is in the negative direction. Hence the net force is:
[tex]F_{NET}=-F_{13}+(-F{23})=-3.47*10^{-5}-1.27*10^{-5}= -4.74*10^{-5}\ N[/tex]
Tommy runs around a track whose circumference is 400 meters. He runs a single lap in a time of 62 seconds. What is Tommy’s displacement
Answer:
Angular Displacement 6.28 radiansExplanation:
for circular motion we are expected to solve for Angular Displacement it is measured in radian
Measurement of Angular Displacement.
we can measure it using the following relation
∅= s/r
where
s = the distance travelled by the body, and
r = radius of the circle along which it is moving.
given that
circumference c, s= 400 m
r= ?
we have to solve for the radius
we know that circumference
[tex]c= 2\pi r[/tex]
400= 2*3.142*r
400= 6.282*r
divide both sides by 6.284 we have
400/6.284
r= 63.63 m
Angular displcament
∅= 400/63.63
∅= 6.28 radians
Read the passage about the health risks of single-load liquid laundry packets. These packets are filled with concentrated, toxic chemicals. A 7-month-old in Florida died from swallowing the soap. Several soap and detergent companies are conducting studies to address these safety concerns; they want to reduce toxicity and to make the packets look less like candy. The U.S. Consumer Product Safety Commission (CPSC) is also performing studies to build more safety into these products. Why would the CPSC perform studies when other soap and detergent companies have already conducted research on the same products? The CPSC is the only organization that can test the safety of soaps and detergents. Studies conducted by any company that benefits financially are considered unreliable. Studies performed by the CPSC give reliability to the results of improved safety obtained by each soap company. Tests performed by the CPSC follow established scientific methods, but those performed by soap companies do n
Answer:
Studies performed by the CPSC give reliability to the results of improved safety obtained by each soap company.
Explanation:
The CPSC perform case studies when other soap and detergent companies have already conducted research on the same products because of the studies performed by the CPSC gives reliability to the results of improved safety obtained via each soap company.
The third option is correct.
What are chemicals?The chemicals are the artificially prepared or purified and a distinct compound or substance.
Given is the passage about the health risks of single-load liquid laundry packets. The packets are filled with concentrated, toxic chemicals. A 7-month-old child in Florida died from swallowing the soap accidently. Several soap and detergent companies are conducting studies to address these safety concerns. They want to reduce toxicity and to make the packets look less like candy. The U.S. Consumer Product Safety Commission (CPSC) is also performing case studies to build more safety into these products.
The reason for CPSC to perform case studies when other soap and detergent companies have already conducted research on the same products is the studies performed by the CPSC gives reliability to the results of improved safety obtained via each soap company.
Thus, the third option is correct.
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TRUE OR FALSE. For exponential growths, the growth in any doubling time is greater than the sum total of growth in all preceding doubling times
Answer:
False.
Explanation:
Doubling time is the amount time it takes for a population to double in size or quantity.
When the relative growth rate is constant, the population is undergoing exponential growth and the growth rate Is constant.
Exponential growth doubling time can be calculated using rule 70
Which is
Dt=70/r
R is rate.
. What is the momentum of A 200 kg shark swimming at 15 m/s? Don’t forget units!
Answer:
momentum= 200 × 15
= 3000 kg m/s
Explanation:
we know,
mometum= mass × velocity
what is the difference between speed and volocity?
WHAT IS THE MASS OF AN OBJECT THAT WEIGHS 100 N?
Answer:
10.2 kg
Explanation:
Assuming the object is on Earth:
w = mg
m = w / g = 100 / 9.81 = 10.2kg
Which model is most likely used to predict a future event? a model of a cell a model of Mars a model of weather systems a model of prosthetic limbs
Answer:
C. a model of weather systems
Explanation:
just took the test on edge
hope this helps
Answer:
it is c
Explanation:
a model of weather systems
Which model is most likely used to predict a future event?
Which best describes the relationship between hardware and software? Software instructs hardware how to perform. Software allows users to interact with hardware. Hardware directs the performance of software. Hardware enables software to perform correctly.
Answer:
A
Explanation:
Answer:
aAAAAAA
Explanation:
Two forces act in opposite directions on a wood block. What will happen if the forces are unbalanced?
Answer: Its the last one: The position of the block will change
Explanation: Since the forces are unbalanced, one side of the block will be stronger, therefore making the block move.
Answer:portion of the block will change
Explanation:
What do u do if ur baby sitting and the kid falls down the stairs and breaks his nose. Should I tell the parents or no? What do I do
Answer:
Call the parent's for the safety of the baby
Explanation:
CALL 911.
THEN CALL THE PARENTS.
RIGHT NOW ! ! !
6. If a bicyclist, with initial velocity of zero, steadily gained speed until reaching a final velocity of 39m/s, how far would she travel
during the race in the same amount of time)?
Answer:
175 m
Explanation:
The average velocity for constant acceleration is the average of the beginning and ending velocities. That is (0+39)/2=19.5 m/s. If the bicyclist rides for 9 seconds, the distance traveled is ...
(9 s)(19.5 m/s) = 175.5 m
She would travel 175.5 meters in that time.
The distance traveled by the bicyclist at the same time period is 175.5 m.
Your question not complete, i believe it is missing this additional information below:
"Seven bicyclist are racing. Each bicyclist rides for 9s, If a bicyclist, with initial velocity of zero, steadily gained speed until reaching a final velocity of 39m/s, how far would she travel during the race in the same amount of time?"
The given parameter:
initial velocity of the bicyclist, u = 0
final velocity of the bicyclist, v = 39 m/s
time of motion of the each bicyclist, t = 9s
To find:
The distance traveled by the bicyclistLet the distance traveled by the bicyclist = s
The distance traveled by the bicyclist at the same time period is calculated as;
[tex]s = (\frac{u+v}{2} )t\\\\s = (\frac{0 + 39}{2} ) \times 9\\\\s = 19.5 \times 9\\\\s = 175.5 \ m[/tex]
Thus, the distance traveled by the bicyclist at the same time period is 175.5 m.
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A train travels at a speed of 30 m/s. The train starts at an initial position of 1000 meters and travels for 30 seconds. What is its final position?
Answer:
1900 meters
Explanation:
30 * 30=900
900+1000=1900
multiply the speed by the time
add the initial speed
A proper cool-down
O increases the heart-rate
O makes muscles cold
O helps prevent fainting or dizziness
none are correct
Answer:
Option D (none are correct) is the appropriate solution.
Explanation:
After yet another workout, a cool or calming down allows the breathing as well as pulse rate to recover more quickly. It will also assist to eliminate the lactic acid build-up during the exercise, eventually increasing the muscle soreness with delayed onset. Wind yourself off for 5 to 10 minutes by taking public transportation a stationary bicycle.Some other three scenarios do not correspond to something like the situation described. So, this same correct decision is the one above.
A child observes a caterpillar walking on a window sill. The caterpillar walks 18 cm to the left, then 6 cm to
the right, then 10 cm to the left.
a. What is the total distance walked by the caterpillar?
Answer: 34 cm
Explanation:
18+6+10=34 cm
You traveled 150.meters south at a speed of 1.50m/s, and then traveled 600. Meters north at a rate of 2.00 m/s.
1. Wha is the total time of the trip ?
2. What was your average speed ?
3. What was your average velocity ?
Answer:
1.) 400s
2.) 1.875 m/s
3.) 1.125 m/s
Explanation:
Given that you traveled 150.meters south at a speed of 1.50m/s,
Time = distance/ speed
Substitute speed and distance into the formula
Time = 150/1.5
Time = 100 s
and then traveled 600. Meters north at a rate of 2.00 m/s.
Time = 600 / 2
Time = 300 s
1.) Total time = 100 + 300
Total time = 400 s
2.) The average speed will be total distance travelled over total time.
Total distance travelled = 150 + 600
Total distance travelled = 750 m
Substitute all the parameters into the formula
Average speed = 750/400
Average speed = 1.875 m/s
3.) Average velocity will be displacement over total time
Displacement = 600 - 150
Displacement = 450 m
Average velocity = 450/400
Average velocity = 1.125 m/s
The acceleration of a falling rock that was initially moving 5 m/s, and had a final velocity of 11 m/s after accelerating for 3 seconds.
Answer:
2 m/s²
Explanation:
Given:
v₀ = 5 m/s
v = 11 m/s
t = 3 s
Find: a
v = at + v₀
11 m/s = a (3 s) + 5 m/s
a = 2 m/s²
Please help!!!!
1. If you move 5 meters East and 5 meters west what is the distance and what is the displacement?
2.if you move 5 meters south and move 2 meters north what is the distance and what is the displacement?
3. If you move 10 meters west and move 3 meters East
What is the distance and what is the displacement?
Answer:
1) dist 10m, displacement 0m
2) dist 7m, displacement 3m
3) dist 13m, displacement 7m
Explanation:
Distance is the total distance travelled (2 distances added), but displacement is where you end up relative to where you started.
Think of it like a number line. When you move east, you are adding 5, and when you move west, you are subtracting 5. In total, you have walked 10 meters, but overall you ended up in the same place.
If you want to have a physical demonstration of this concept, take 5 steps left and 5 steps right, and do the same with the other examples. You will probably get a fuller understanding of this concept.
Who know what parkour is list 1 thing that u know about parkour
Answer:
Excuse me? I'm truley sorry but I cannot understand you
Explanation:
which of the items has the least inertia while at rest? A. penny. B. airplane. C. frog. D. dog.
Answer:
A penny
Explanation:
I need help? Please
Answer:
Three examples of insulators would be metals, graphite, and the human body. Examples of insulators include plastics, rubber and glass. Lastly, a few examples of semiconductors would be silicon, germanium and gallium arsenide.
Explain how the velocity of an object changes in respect to time.
Answer:
Is this your ans of this question
Answer:
The rate of change in the velocity of an object per unit time is referred as acceleration and the kind of motion is known as accelerated motion. The acceleration is positive when it is in the direction of velocity and negative when it is opposite to the direction of velocity.
Explanation:
HOPE YOU UNDERSTAND
A drag racer starts her car from rest and accelerates at 10.9 m/s^2 for the entire distance of 226 m. How long did it take the car to travel this
distance? Answer in units of s.
u=0
a=10.9m/s^2
s=226m
v^2-u^2=2as
v^2=2 (10.9)(226)
v^2=49268
v=70.2m/s^2
v=u+at
70.2=0+10.9 (t)
70.2/10.9=t
t=6.44s
Convertir 4.5 hr a min
Answer: 4.5 hours to a minutes would be 270 minutes. I hope this helped you god bless you and have a great day :D
Answer: 270 min
Explanation: 1 hour = 60 minute. Just multiply 60 by 4 and you get 240 and then just add 30 since it’s .5 which is half.
what do you meant by charging by rubbing
Please give the answer
Answer:
Explanation:
When two materials are rubbed against each other, they become charged.
It is called charging by rubbing.
Hope this helps
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A rocket is launched from the launch pad at a speed of 700 km/hr.
How far will the rocket have traveled after 1.5 hour?
Answer:
Explanation:
Vm = Δs/Δt
700km/h = Δs/1.5h
700 = Δs/1.5
[tex]\frac{700}{1} = \frac{S}{1.5}[/tex]
S = 700 x 1.5
S = 1050 Km
*(S = Δs)
Answer: The rocket will have traveled 1050 Km
Hope this help ☺
After 1.5 hour the rocket will have traveled 1023.54 km.
What is speed?In everyday use and in kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity. SI unit of speed is meter/second.
Initial speed of the rocket = 700 km/hr
= 700 (1000/3600) meter/second
= 194.44 meter/second
Acceleration due to gravity is = 9.8 m/s²
Time interval is = 1.5 hour = 1.5 × 60 × 60 second
hence, after 1.5 hour the rocket will have traveled = (194.44) (1.5 × 60 × 60) - 1/2×9.8×(1.5×60×60)² meter
= 1050000 meter - 26460 meter
= 1023540 meter
= 1023.54 km.
So, the rocket will have traveled 1023.54 km after 1.5 hour .
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