A minibus drives with a constant speed of 32 km/h. How long will it take to travel a distance of 48 kilometers?
Distance covered = (speed) x (time)
Time = (Distance covered) / (speed)
Time = (48 km) / (32 km/hr)
Time = (48/32) hr
Time = 1.5 hrs (1 hour 30 minutes)
A river flows at 2.50 m/s to the north,
while a boat travels from south to north with a
constant velocity of 12.5
m/s relative to the water.
What is the velocity of the boat relative to an
observer at rest on the shore?
Answer:
15 m/s towards the North
Explanation:
we need to add both velocities to find the effective velocity from the point of view of an observer at rest on the shore:
2.5 m/s + 12.5 m/s = 15 m/s pointing North
It is a hot summer day at the beach. From your understanding of specific heat capacity, what can you expect to be the difference between the sand and the water?
The water will gain more thermal energy than the sand
The water will heat up faster then the sand
The sand will heat up faster than the water
The sand will lose its energy more slowly than the water
Answer:
the sand will heat up faster than the water
Explanation:
water has slow heat conduction
and sand had high heat conduction
Calculate equivalent resistance in the following between points P and Q
[tex] \sf{(i) \: We \: are \: given \: a \: figure \: of \: Series \: Circuit. }[/tex]
[tex] \sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3Ω[/tex]
[tex] \sf• \: R_{3} =3Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Series \: Circuit, }[/tex]
[tex] \bf \purple {\bigstar {\: R_{s} = R _{1} + R _{2} + R_{3}+...+ R_{n}}}[/tex][tex] \sf ⇒ R_{s} =(3 + 3 + 3)Ω[/tex]
[tex] \sf \therefore R_{s} =9Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 9 Ω.}}[/tex]
[tex] \\ \\ [/tex]
[tex] \sf{(ii) \: We \: are \: given \: a \: figure \: of \: Parallel \: Circuit. }[/tex]
[tex]\sf{Here \: Resistances \: are ,}[/tex]
[tex] \sf• \: R_{1} =3 Ω[/tex]
[tex] \sf• \: R_{2} =3 Ω[/tex]
[tex] \sf• \: R_{3} =3 Ω[/tex]
[tex] \sf{We \: know \: the \: formula \: of \: the \: Equivalent \: Resistance \: for \: Parallel \: Circuit, }[/tex]
[tex] \bf \purple {\bigstar {\: \frac{1}{R_{p}} = \frac{1}{R _{1}} + \frac{1}{R_{2}} + \frac{1}{R_{3}}+...+\frac{1}{R_{n}} }}[/tex][tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1}{3} + \frac{1}{3} + \frac{1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{1 + 1 + 1}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = \frac{3}{3} [/tex]
[tex] \sf⇒ \frac{1}{ R_{p} } = 1[/tex]
[tex] \sf \therefore R_{p} = 1Ω[/tex]
[tex] \sf \pink{ \boxed{Answer : 1 Ω.}}[/tex]
i have answered . check that. ok? what is ur name? can u tell me?
A 25.0 kg object is held 8.50 m above the ground. Calculate its PE
Answer:=mgh
Explanation:
Suppose you increase your walking speed from 1 m/s to 3 m/s in a period of 2 s. What is your acceleration?
Answer:
1 m/s²
Explanation:
a = (Vf - Vi)/t
a = (3-1)/(2)
a = 2/2
a = 1 m/s²
I might be wrong ¯\_(ツ)_/¯
A truck is parked at the bottom of a hill. It moves from the bottom of a hill
and parks at the top. How does the truck's potential energy when it is at
the bottom of the hill compare to its potential energy when it is at the top
of the hill?
A. The truck's potential energy is lower at the top of the hill compared to when it is at the
bottom of the hill.
B. The truck's potential energy is the same at the top of the hill compared to when it is at
the bottom of the hill.
C. The truck's potential energy is greater at the top of the hill compared to when it is at
the bottom of the hill.
D. The truck's potential energy is zero at the top of the hill compared to when it is at the
bottom of the hill.
Answer:
C
Explanation:
potential energy is stored energy that an object has due to its position or chemical composition. Since the truck has the possibility to move down the hill when it is at the top of the hill, it has a great amount of potential energy, howver when its at the bottom of the hill, it doesn’t have the possibility to move or can move v little due to its positions, therefore it has little to no potienatal energy.
The truck's potential energy is greater at the top of the hill compared to when it is at the bottom of the hill. Option (C) is correct.
What is potential energy?The energy held within an object is known as potential energy. There are several different types of potential energy, including gravitational potential energy, elastic potential energy, and electric potential energy.
Here, the energy that an object possesses as a result of its position in relation to other objects is referred to as its gravitational potential energy.
A truck is parked at the bottom of a hill. It moves from the bottom of a hill and parks at the top. its height increases, do, its potential energy also increases. The truck's potential energy is greater at the top of the hill compared to when it is at the bottom of the hill.
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The inner planets have a smaller diameter than the outer planets.
True
False
Answer:true
Explanation:
Differences between luminous and non luminous as a source of light.
Explanation:
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Differentiate between luminous and non luminous objects.user
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The difference between luminous and non-luminous objects are -:
1. Luminous objects are the objects which emit light energy by themselves are called luminous objects. Whereas, non-luminous objects are the objects which does not emit light energy by themselves. 2) Luminous objects cause the sensation of light. Whereas, non-luminous objects do not cause the sensation of light. 3) Luminous objects are seen on their own. Whereas, non-luminous objects are seen due to luminous objects. 4) Examples of luminous objects are sun, candle, electric bulb. Whereas, examples of non-luminous objects are the moon, chair, plants.
Answer:
Explanation:
Objects that can emit light energy by themselves are known as luminous objects. These objects can cause the sensation of light.Objects that cannot emit light energy by themselves are known as non-luminous objects.These objects do not cause the sensation of light.
What it the direction of the weight or force of gravity?
Answer:
The weight is distributed throughout the airplane, but we can often think of it as collected and acting through a single point called the center of gravity. In flight, the airplane rotates about the center of gravity, but the direction of the weight force always remains toward the center of the earth.
Explanation:
Which radio wave technologies would be unaffected by satellites that are not working properly?
space communication and television broadcasting television broadcasting and GPS O MRI and radio telescopes
O radio telescopes and space communication
Answer:
MRI and Radio telescopes
MRI and radio telescopes would be unaffected by satellites that are not working properly.
What is radio wave?The longest wavelengths in the electromagnetic spectrum are found in radio waves, which typically have frequencies of 300 gigahertz (GHz) and lower. The wavelength for 300 GHz is 1 mm, which is shorter than a grain of rice, while the wavelength for 30 Hz is 10,000 km (6,200 miles) (longer than the radius of the Earth).
Radio waves move at the speed of light in a vacuum, as do all electromagnetic waves, and at a nearly identical speed in the Earth's atmosphere.
Among the given options, space communication and television broadcasting television broadcasting and GPS and radio telescopes and space communication are affected by satellites that are not working properly because they are operated by satellite technology.
Hence, only MRI and radio telescopes would be unaffected by satellites that are not working properly.
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Which is NOT an example of work?
pushing a box across the floor
trying to push a rock that never moves
picking up a box off the floor
raising a barbell over your head
Answer:
trying to push a rock that never moves
Explanation:
let me try my best to break the concepts down for you.
the definition of work done is
work done by a constant force on an object is the product of the force and the distance moved by the object in the direction of the force.
this means that when you apply a force, it must move.
basically it is like holding a book in your hands and not moving, are you fighting the gravitational force?
when you push a box, it definitely moves in the direction you push right?
when you raise the barbel, you are applying a upward force, and barbel us moving upwards, so work is done
hope it helps, if not please report it so that someone else gets to try it
A plane taxies onto the runway, preparing for take off. It starts at rest before it's engines start. The plane's top speed, before it takes off the ground, is about 8820 km/s. If the take off takes about 32.8s, what is the acceleration of the plane?
Answer:
Explanation:
This is a fast plane! At it's takeoff speed, it could fly around the world in 5 seconds!
Acceleration is defined as the change in speed over the change in time.
[tex]a = \frac{v_f - v_o}{t}[/tex]
Where v_f is the final velocity, v_o is the original velocity, and t is the time.
We know v_f = 8820km/s.
v_o = 0 km/s. The plane "starts at rest before it's engine start." So we know it starts from zero velocity.
t = 32.8 seconds.
You can solve the equation from there.
EASY PLEASE HELP. As the rocket rises, it's kinetic energy changes. at the time the rocket reaches its highest point most of the energy of the rocket has been-
A) permanently destroyed
B) transformed into potential energy
C) converted to friction
D) stored inside the body of the
Answer:
c
Explanation:
Convert 250mm to kilometers using conversion factor
Answer:
0.00025 kilometers
Explanation:
divide the length value by 1e+6
Answer:
250 mm = 0.00025 km.
Explanation:
250 mm equal 0.00025 km
Conversion details
To convert mm to km use the following formula:
1 mm equals 0.000001 km
So, to convert 250 mm to km, multiply 0.000001 by 250 i.e.,
250 mm = 0.000001 * 250 km = 0.00025 km
(hope this helps can i plz have brainlist :D hehe)
A crate moves DOWN an inclined plane below with a
diagram for the crate?
Answer:
The answer should be the one on the top in the picture.
Explanation:
Friction is opposing the downward movement of the crate therefore the friction force is pointing upwards. that is why the answer should be the one on the top of the picture.
A ball bounced by a basketball player on the floor bounces back up at her. Newton's First Law Newton's Second Law Newton's Third Law
Answer:
Newton's Third Law of Motion
Explanation:
Newton's Third Law of Motion which states that, for every action there is an equal but opposite reaction.
This ultimately implies that, in every interaction, there is a pair of forces acting on the two interacting objects.
In this scenario, a ball bounced by a basketball player on the floor bounces back up at her.
According to Newton's Third Law of Motion, the statement above simply means that in every interaction, there is a pair of forces acting on the two interacting objects i.e the ball and floor. The size of the force on the ball equals the size of the force on the floor. These two forces are called action and reaction forces and are the subject of Newton's third law of motion.
Hence, the ball bounced by the basketball player on the floor would bounce back in equal magnitude.
what is electron affinity?
Answer:
The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion.
A 2-cm tall object is located 10 cm in front of a concave lens that has a focal length of -20 cm. Calculate the image distance and the image size. (Describe the image) *
Answer:
image distance =-6.6 7cm
image size=1.3cm
Explanation:
What type of relationship exists between the comma teasel and all of the other plant
Answer:
Parasitic Relationship
A symbiotic relationship that is mutualism exists between the comma teasel and all of the other plants.
What is a Symbiotic relationship?Symbiosis or symbiotic relationship is any type of close and long-term biological interaction which is present between two different biological organisms, be it mutualistic relationship, commensalistic relationship, or parasitic relationship. The organisms, each termed as a symbiont, must be of different species.
The comma teasel and all of the other plants share a relationship where, the comma teasel pollinates flowers of different plant species. Pollination is important for the reproduction in plants and in return, the plants provide nectar to the organism.
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What is a joule?
1 foot/lb
1 meter per second squared
1 meter
1 N-m
Answer:
Input Output
1 ft-lb 12 in-lb
1 in-lb 0.113 Nm
1 Nm 0.7376 ft-lb
1 in-lb 0.0833 ft-lb
1 ft-lb 1.3558179 Nm
1 in-lb 15.999999461875 in-oz
1 Nm 8.850746106833 in-lb
1 l-atm 101.325 J
1 Nm 3.72506E-7 hph
1 J 1 Nm
Explanation:
please mark as briliant
Answer:
1N-m
Explanation:
teacher just taught this an hour ago for my class
Describe the factors that affect the stopping distance of a vehicle. In your answer explain the difference between thinking distance braking distance and stopping distance how they are related and factors which affect their lengths? 6 marks
Please can anyone help me ASAP please
Answer:
In an emergency, a driver must bring their vehicle to a stop in the shortest distance possible.
Stopping distance = thinking distance + braking distance
This is when: thinking distance is the distance a vehicle travels in the time it takes for the driver to apply the brakes after realizing they need to stop .
braking distance is the distance a vehicle travels in the time after the driver has applied the brake .
Reaction times vary from person to person, but are typically 0.2 seconds (s) to 0.9 s. A driver's reaction time can be affected by:
-tiredness
-drugs
-alcohol
-distractions
Longer reaction times increase the thinking distance when stopping from a given speed.
There are different ways to measure reaction times. One simple method involves dropping a ruler between someone's open thumb and forefinger. The further the ruler falls before being stopped, the higher the reaction time of the person grabbing the ruler. The ruler can be marked in s rather than in mm.
Draw the position vs. time graph for a person walking at a constant speed of 1m/s for 10 seconds. On the same axes, draw graph for a person running at a constant speed of 4m/s
Plot a graph, constant speed of movements represented as straight lines. Time on X axis (seconds) and position on Y axis (metres) , calculated by moving, e.g 4metres in a second.
Which characteristic is true of sexual reproduction but not of asexual reproduction?
F.produces diverse offspring
G.produces new individuals
H.involves a form of cell division
J.involves one or more parents
Answer:
it has to be ''G''
Explanation:
.
Answer:
J
Explanation:
Sexual reproduction includes 2 parents but asexual reproduction only requires 1.
The radius of the aorta is about 1 cm and the blood flowing through it has a speed of about 30 !" ! . Calculate the average speed of the blood in the capillaries given the total cross section of all the capillaries is about 2000 !"!
Answer:
The average speed of the blood in the capillaries is 0.047 cm/s.
Note: The question is incomplete. The complete question is as follows:
The radius of the aorta is about 1 cm and the blood flowing through it has a speed of about 30 cm/s. Calculate the average speed of the blood in the capillaries given the total cross section of all the capillaries is about 2000 cm².
Explanation:
From the given values:
radius of the aorta, r₁ = 1 cm
speed of blood, v₁ = 30 cm/s
Area of the aorta, A₁ = πr₁² where π = 3.142
Area of aorta = 3.142 × (1)² = 3.142 cm²
Area of the capillaries, A₂ = 2000 cm²
let the average speed of the blood in the capillaries = v₂
From the continuity equation of fluid flow, the product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is always constant. In formula, A₁v₁ = A₂v₂
Using the continuity equation, the average the average speed of the blood in the capillaries can be calculated thus:
A₁v₁ = A₂v₂
v₂ = (A₁v₁) / (A₂)
v₂ = (3.142 x 30) / (2000)
v₂ = 0.047 cm/s
Therefore, the average speed of the blood in the capillaries is 0.047 cm/s.
P2O5 is a covalent compound used to purify sugar. How many atoms of phosphorus does this compound have? How many atoms of oxygen does this compound have?
Answer:
2 atomic of phosphorus and 5 of oxygen
Explanation:
The numbers attached to the elements (ie. subscript) show the amount of atoms present for each element.
Help me my brain cant comprehend this
Answer:
delta(️) means
Explanation:
plz mark me as brainlist
Answer:
The 'change of'.
Explanation:
So basically think delta as a prefix for a word and delta means change of. So if we are looking for delta (v), then that means we are looking for the change of the velocity. Another example is that if we are looking for delta (t), then that means we are looking for the change of the Time. You can find the change of pretty much anything and everything by using the formula ( final x - initial x ) and x equals whatever value you are trying to final the delta of. Hope this makes sense, and if you want a more detailed answer lmk.
Need help ASAP
Thankss + BRAINLIST only for correct answers
1.Which of the following statements about light waves is true? check all correct answers
A.They come from sources across space
B.They travel in a straight line from their source
C.They can travel through any type of material
D.They can be reflected by some types of material
2.Transparent allows some light through
A.True
B.false
Answer:
A, B and D
2. A
Explanation:
1.Which of the following statements about light waves is true? check all correct answers
A.They come from sources across space reason is that a light can travels form its source and its moves across the space
B.They travel in a straight line from their source reason is that the type of light that undergo these is called parallel ray of light
C.They can travel through any type of material reason not all materials light can penetrate through e.g wall
D.They can be reflected by some types of material reason is that some materals reflect light rays e.g polished mirror
Write a summary paragraph discussing this experiment and the results. Use the following questions and topics to help guide the content of your paragraph.
According to your data, was your hypothesis correct? (Be sure to refer to your data when answering this question.)
Summarize the conclusions that you can draw from this experiment. Use the questions above to guide your ideas.
Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems.
Give at least three examples from everyday life where an inclined plane is used to reduce the effort force needed to accomplish a task.
In this experiment, you will determine the IMA, AMA, and efficiency.
The materials for this experiment are:
a smooth board
smooth block or other object to drag up a plane
a spring scale (calibrated in newtons)
string
books or blocks to support the inclined plane
and a meter stick.
Your job is to observe the experiment and collect your own data from this demonstration.
Be ready to record your observations and data.
You will be pulling an object up an inclined plane at different inclines.
Make and record a hypothesis about how changine the slope of inclined plane will affect the efficiency.
Measure the height and length of the plane, record the measurements.
Measure the mass of the object, and record. Convert the mass from grams to newtons by dividing by 102, and record.
Now slowly and steadily pull the object up the incline with the spring scale and string kept parallel to the incline.
Record the readout on the scale.
This will be the effort force.
Now increase the slope of the incline by increasing the height.
Measure the height of the new incline.
The length of the incline remains constant.
Slowly and steadily pull the object up the incline, record the readout from the scale.
You are now ready to complete the rest of this assignment.
Answer:
LOL i belive its 200 because i did this exact same thing yesterday for homework and got it right bcs i got it lol, yw btw! hahaha! good luck also, subscribe to my channel!
Explanation:
Which of the following statements BEST explains why ball-and-socket joints have the greatest range of motion?
A.
The contours of the two bones allow for maximum movement.
B.
The even planes of the bones allow full rotation.
C.
The two matching surfaces allow for movement in multiple directions.
D.
The cup shape of the socket allows for nearly circular motion.
Answer:
its d on edge c: