Answer:
A simple microscope is an optical instrument we use for the magnification of small object to get a clear image or vision.It is a convex lens having a short focal length.
Answer:
Optical instruments is an instrument which is used in lens to make the image of an image
.
What change in the velocity's horizontal
component (v) and the range occurs
with each unit of time while getting
through the water?
Answer:
h the books
Explanation:
HELP me do this question PLEASE REPLY to you kripa and subscribe to you and ask for help me do this question PLEASE let them hate me and subscribe to the world 3rd birthday to you and I am sorry to hear that you are 4th and subscribe to the world of the books 4th century and subscribe to the world of the world of ❤❤
An ant climbs to the very end of the second hand on a wall-mounted clock at exactly 9:15:00. The second hand is 13.5 cm long. When the time is exactly 9:17:30, (a) what distance did the ant travel? (b) What is the ant‟s displacement at this time? (c) What was the ant‟s average speed? (d) What is the ant‟s average velocity at this time? (e) At what time would the ant have traveled a distance of 100. M (give your answer to the nearest second).
Answer:
Explanation:
a) The second arm measures the minutes. The difference between 9:17:30 and 9:15:00 is 2 minutes 30 seconds. This means the second arm would have revolved 2.5 times.
The circumference = 2πr= 2π(13.5 cm) = 84.823 cm
Distance = 2.5 × 84.823 cm = 212 cm = 2.12 m
b) Displacement of an object is the shortest distance between the initial and final point. Since the second arm revolves 2 and half times, we use only the half times (a semicircle)
Displacement for semicircle = 2r = 2(13.5) = 27 cm
c) Average speed = distance / time
time = 2 minutes 30 seconds = 150 seconds
Average speed = 212 cm / 150 s = 1.41 cm/s
d) Average velocity = displacement / time = 27 cm / 150 s = 0.18 cm/s
e) number of revolutions = 100 m / circumference = 100 m / 0.848 m = 117.92
but 1 revolution = 1 minute
117.92 revolution = 117 minutes 55 seconds = 1 hour 57 minutes 55 seconds
Hence the time would be: 11:12:55
Scientists might make a computer model of volcanic eruptions. What is the biggest benefit of this model
Answer:
I think it would be to be able to prevent a volcanic eruption in the future and take the appropriate prevention protocols.
Explanation:
This is a short answer question, please answer in full sentences.
Apply Newton’s third law of motion to the action of serving a volleyball.
Answer:
when we hit the volleyball. the ball goes up comes down
it comes down as it is forced by gravity
the force in which ball comes back is Newton 3 law
) What is work? Write down the types of work.
Work
In physics work is said to be done when a force acting on a body displaces it through a certain distance. The work by a constant force is measured by the dot product of force will displacement.
i.e. W = F.S or W = F S cosq …(1)
where F = force and S = displacement
And q = angle between F and S.
Hope this helps! <3
What is the acceleration due to gravity?
А
B
9.2
12.3
С
8.83
D
9.81
Acceleration is a vector quantity. When an object is said to have a negative acceleration, does it always mean that the object is slowing down? OTrue OFalse
in determining the percentage purity of an impure NaCo3 for 4.2g of the impure was place in measuring cylinder to work up to 1000cm . the resultant solution is neutralize by 0.092m of 20.40cm3 Hcl in lab [ na=23,o= 16, c=12, h=1, cl=35-5]
hint: percentage purity =mass pure substance ×100
mass concentrate : impure substance??
[tex] {?}^{2} [/tex]
[tex] \binom{}{3} [/tex]
Answer:
C
Explanation:
I guess...
Sorry if it's wrong
When conducting a polygraph test why is it important for the interviewer to establish a baseline on the interviewee?
Answer:
Because always when we do an experiment, we need something to compare.
For example, if we want to see how much change a given color paint when we add different amounts of white paint to it, we need to have at least one sample of pure color paint, so we can compare it whit the ones with mixed paints.
Well, the case of the polygraph is exactly the same, we need to have a baseline, so we the interviewer can see if for some questions there is a change in the line compared with the baseline.
HELP PLEASE!!!! 20 POINTS! If we increase the distance traveled over the same period of time, this will (2 points) decrease the speed
increase the speed
decrease the velocity
not affect speed or velocity
1. What are three examples of forces?
Answer: Gravitational force.
Electric force.
Magnetic force.
Nuclear force.
Frictional force.
Explanation: I learned when I had science class.
Question 10 of 10
Two particles are separated by 0.38 m and have charges of 1.25 x 10-9C and
1.92 * 10-°C. Use Coulomb's law to predict the force between the particles if
the distance is doubled. The equation for Coulomb's law is F = kouse, and
the constant, k equals 9.00 x 109 Nm²/C2
A. -1,50x10-7N
B. -3.74 x 10-8N
C. 1,50 x 10-7N
D. 3.74 x 10-8N
SUBMIT
Answer:
Its d 3.74 x 10-8N
Explanation:
Answer: 3.74 x 10-8 N
Explanation:
V=A shot-putter tosses an 8 kg metal ball across a field. The ball moves from rest to a velocity of 4 m/s in 0.8 seconds. Calculate the force (in Newtons) that was used to move the ball. Don't input the unit.
What is the smallest unit that makes up matter?
alloys
atoms
chemicals
molecules
Answer:
atoms
Explanation:
.....(✿^‿^).......
Answer:
atom
Explanation:
An atom is the smallest unit of matter that retains all of the chemical properties of an element
8. You are heating a substance in a test tube. Always point the open end of the ne
a. Toward yourself
b. Toward your lab partner
C. Toward another classmate
d. Away from all people
Answer:
b ok bye thansks
bye.
Always point the open end of a test tube being heated d. Away from all people.
When heating a substance in a lab, there is a chance that the substance could react to the heat and evaporate into a gaseous state.
This could be very dangerous if the gas is:
corrosivea pollutant biological breathing hazardYou should therefore be careful to point the tube away from others and yourself so that the gas does not affect either them or you.
In conclusion therefore, always point the open end of the tube away from all people.
Find out more precautions at https://brainly.com/question/2792204
accelerates uniformly from rest, reaching a speed of 36 meters per second in 6.0 seconds
Answer:
What's the question?
Explanation:
How RLC circuit is used?
Answer:
Explanation:i s an oscillating circuit consisting of a resistor, capacitor, and inductor connected in series. ... The voltage in the capacitor eventually causes the current flow to stop and then flow in the opposite direction. The result is an oscillation, or resonance.
What is the speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy?
Answer:
v=53.3m/s
Explanation:
Ek=1/2mv²
7.81×10⁴=1/2×55.0v²
v= the square root of 7.81×10⁴/0.5×55.0
v=53.3m/s
The speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy is 53.29 m/s.
To find the speed, the given values are,
Mass m = 55 Kg
Kinetic Energy = 7.81x 10⁴ J
What is Speed?Speed is the rate of change of distance with time. It is a scalar quantity with magnitude both no direction.
Speed = Distance / Time m/s.
The unit is m/s or km/hr or mile/hr.
Distance covered is simply the length of the path traveled. The unit is m or km or miles.Time taken is the duration of an event. The unit is seconds or minutes or hour.Formula,
Kinetic energy = Ke = 1/2 mv²
When we solve for v,
v² = 2Ke/m
Substituting the given values,
v² = 2(7.81 x 10⁴) / 55
Simplifying,
v² = 15.62 x 10⁴ / 55
v² = 0.284 x 10⁴
v = 0.53291 x 10⁴
v = 53.29 m/s.
The speed of a 55.0 kg skydiver who has 7.81 x 104 J of kinetic energy is 53.29 m/s.
Learn more about speed,
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Which event in the “The Medicine Bag” is most symbolic of Martin beginning to connect with his Sioux heritage?
Martin brings his friends home to meet Grandpa.
Martin chases the dogs away from Grandpa.
Martin finds a leather pouch around Grandpa’s neck.
Martin finds money in Grandpa’s boots.
Answer:
A- Martin brings his friends home to meet grandpa.
Explanation:
took the test.
Answer:
A
Explanation:
on edge :)
When does The mass of an object change
O A. it changes shape
O B. it loses a piece hs
O C. it gets hotter
O D. it gets cooler
Answer:
B. when it loses a piece
Explanation: it likely gets lighter
A ___ is the unit of measurement for force.
Answer:
Newton (N)
Explanation:
A newton is the unit of measurement for force
A car moves with a velocity of 20 m/s to east and the other with velocity of 15 m/s to west. If they move from the same point, how far will each of them travel in 2 minutes? Calculate the distance between them after 2 minutes
Answer:
4.2 km
Explanation:
CAR A(velocity =20m/s to East)
In 1s, it covers 20m.
In 120s(2min),it covers20*120m.=2400m=2.4 km
CAR B(velocity =15m/s to west)
In 1s, it covers 15m.
In 120s, it covers 15*120m.=1800m=1.8km
Now, distance between the two cars after 2 minutes =2.4 km+1.8 km=4.2km
A roundabout in a fairground requires an input power of 2.5 kW when operating at a constant angular velocity of 0.47 rad s–1 . (a) Show that the frictional torque in the system is about 5 kN m. (3) 1. (b) When the power is switched off, the roundabout decelerates uniformly because the
Answer:
Explanation:
Since the roundabout is rotating with uniform velocity ,
input power = frictional power
frictional power = 2.5 kW
frictional torque x angular velocity = 2.5 kW
frictional torque x .47 = 2.5 kW
frictional torque = 2.5 / .47 kN .m
= 5.32 kN . m
= 5 kN.m
b )
When power is switched off , it will decelerate because of frictional torque .
2. Floyd Beattie set an unofficial speed record for a Floyd Beattie set an unofficial speed record for a unicycle in 1986. He rode the unicycle through a 200
m speed trap and accelerated at a constant rate along the speed trap, so that his initial speed was 9.78
m/s and his final speed was 10.22 m/s. What would the magnitude of his acceleration have been?
Answer:
0.022m/s²Explanation:
Given
v = 10.22m/s
u = 9.78m/s
S = 200m
Using the equation of motion'
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the acceleration
S is the displacement
Substitute the given parameters into the formula:
10.22² = 9.78² + 2a(200)
104.4484 = 95.6484 + 400a
400a = 104.4484 -95.6484
400a = 8.8
a = 8.8/400
a = 0.022m/s²
Hence the magnitude of his acceleration would have been 0.022m/s²
Most of the Earth's volcanoes occur
A.
near the center of tectonic plates.
B.
where there are no tectonic plates.
C.
along tectonic plate boundaries.
D.
before tectonic plates can form.
Answer:
A.
Explanation:
NEAR THE CENTER OF TECTONIC PLATES.
Answer: C. along tectonic plate boundaries
Explanation:
Right on Study Island 2021
How is a warm front different than a cold front? ANSWER NOW I ONLY HAVE 15 MINUTES LEFT! I will not give brainliest unless answered in time
Answer:
Warm fronts move more slowly and are less violent than cold fronts. They are associated with warm air moving over cold air and are more likely to produce large regions of light to moderate rain, drizzle or snow.
Explanation:
Complete the statements by writing “image” or “no image”.
Becquerel expected to find (an)
when he developed the photographic plate that had Sun-exposed minerals on top of it.
Becquerel expect to find (an)
when he developed the photographic plate that had been in the closed drawer.
Answer:
1 Imadge 2 no
Explanation:
Answer: 1: image, 2: no image
Explanation:
A train traveled at an average speed of 80 mph for 4.2 hours. Then, it traveled at an average speed of 60 mph for 1.5 hours. What was the total distance covered by the train?
Answer:
The answer is four hundred twenty six or 426
Answer:
426
Explanation:
A sound wave ________ and ______ the air molecules around your ear.
A sound wave squeezes together and thins out the air molecules around your ear. The places where these things happen are called the compressions and rarefactions of the sound wave.
from problem 2,suppose another boy, boy C pulls the heavy cabinet with 5N of force in the same direction with boy A
1. what will be the net foece on the cabinet?
2. will the cabinet move?
3. in what direction will the cabinet move?
Answer:
Searching in Google I found that in problem 2 were two boys pulling the heavy cabinet, a Boy A pulling in the left direction with 10 N of force, and a boy B pulling in the right direction with 5 N.
1. F = 10 N
2. Yes, it will move.
3. It will move to the left direction of the cabinet (same direction as the boys A and C).
Explanation:
Searching in Google I found that in problem 2 were two boys pulling the heavy cabinet, a Boy A pulling in the left direction with 10 N of force, and a boy B pulling in the right direction with 5 N.
1. Hence, if another boy (C) pull in the same direction as the boy A with 5 N of force, we have:
[tex] \Sigma F = F_{A} + F_{C} - F_{B} [/tex]
[tex] \Sigma F = 10 N + 5 N - 5 N = 10 N [/tex]
The net force on the cabinet is 10 N.
2. Yes, the cabinet will move. From point 1 we can deduce that the cabinet will move since the net force on the cabinet is different from zero (10 N).
3. The direction of the motion is the same as the Boys A and C, that is to say, to the left of the cabinet.
I hope it helps you!
The net force acting on an object, is the vector sum of all the forces acting on it
The correct values for the forces acting on the cabinet are;
1. The net force on the cabinet is 10 N
2. Yes, the cabinet will move
3. The cabinet will move in the direction of boy A and boy C
The reason the above values are correct are as follows:
Question: The possible missing part of the question is; In problem 2 boy A is pulling a heavy cabinet with [tex]F_A[/tex] = 10 N force, and boy B is pulling the same cabinet at the same time and in opposite direction with a force of [tex]F_B[/tex] = 5 N
The known parameter:
The force with which boy C pulls the heavy cabinet = 5 N
The direction in which boy C pulls the cabinet = The same direction as boy A
Question 1. The net force on the cabinet, [tex]F_{NET}[/tex] is given as follows;
Taking the direction of the force of boy A as the positive direction, we have;
[tex]\overset \longrightarrow {F_A}[/tex] = 10 N
[tex]\overset \longrightarrow {F_B}[/tex] = - 5 N
[tex]\overset \longrightarrow {F_C}[/tex] = 5 N
[tex]\overset \longrightarrow {F_{NET}}[/tex] = [tex]\overset \longrightarrow {F_A}[/tex] + [tex]\overset \longrightarrow {F_B}[/tex] + [tex]\overset \longrightarrow {F_C}[/tex]
[tex]\overset \longrightarrow {F_{NET}}[/tex] = 10 N + (-5 N) + 5 N = 10 N
The net force on the cabinet, [tex]\overset \longrightarrow {F_{NET}}[/tex] = 10 N
Question 2. Yes: Given that there is a net force acting on the cabinet, according to Newton's first law of motion, in the absence of friction force, the cabinet will move in the direction of the net force of 10 Newton
Question 3. The cabinet will move in the direction of the net fore
The direction of the net force is the direction boy A and boy C are pulling the cabinet
Therefore, the cabinet will move in the direction boy A and boy C are pulling the heavy cabinet
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