Answer: What is the difference of physical quanity and a unit?
Explanation: If you are working science or math problems, the answer to this question is that quantity is the amount or numerical value, while the unit is the measurement. For example, if a sample contains 453 grams, the quantity is 453 while the unit is grams.
A speed racer travels 25.3 m/s in 9.6 s. How far did it travel?
Speed = 25.3 m/s
Time taken = 9.6 s
To be calculated:-Calculate the distance covered by a body.
Formula applied:-Speed = Distance/Time
Solution:-We know,
Speed = Distance/Time
[tex] \bf\implies \: 25.3 = \frac{Distance}{9.6} [/tex]
[tex] \bf \implies \: Distance = 25.3 \times 9.6[/tex]
[tex] \bf\implies \: Distance = 242.88 \: m \: (approx)[/tex]
What is a core sample ????
Answer:
Core samples are small portions of a formation taken from an existing well and used for geologic analysis. The sample is analyzed to determine porosity, permeability, fluid content, geologic age, and probable productivity of oil from the site. ... Core samples reveal the physical and chemical nature of the rock.
If a fish experiences an a of 9.8m/s2 over a period of 1.84s, what was the 4v?
Answer:
It’s 18.0 m/s
Explanation:
Use acceleration formula then plug in 9.8 and 1.84s
CAN YOU THE 3 QUESTIONS ILL PUT U AS BRAINLEST!!!!
Answer: 1. 5 1/6 m/s 2. Traveling Left 3. 0.45
Explanation:
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Describe voltage in terms of charge and electrons.
PLEASE HELP I WILL GIVE BRAINLIEST
Answer:
Voltage is a measure of how much energy is delivered to charge. At its most basic, an electron (basic charge) is imparted 1.602×10^−19 joules when moved through an electric potential difference of one volt. An electron is then said to have an energy of 1 electronvolt. So, voltage is energy divided by charge.
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which term refers to a variable that is not allowed to change during an experiment
Answer:
controlled variable
Explanation:
here you go
A control variable refers to a variable that is not allowed to change during an experiment.
What is the control variable?A control variable or scientific constant can be described as an experimental element that is constant and unchanged throughout the course of the investigation in scientific experimentation.
Control variables can strongly affect experimental results where they are not held constant during the experiment in order to test the relative relationship between the dependent and independent variables.
A variable is held constant in order to assess the relationship between multiple variables in an experiment and is a control variable. A control variable is not changed throughout an experiment because its constant state allows the relationship between the other variables. A control variable is what is kept constant throughout the entire experiment.
Therefore, a variable that is not allowed to change during an experiment is a controlled variable or scientific constant.
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Describe the relationship between air time and range.
Answer: For the angles below 40, The air time and range are directly proportional meaning that if air time increases, the range increases. Like said earlier, the total traveled distance in the x-direction depends on the initial velocity and time.
Plz help me. I need urgent Why a magnetic compass is used to determine direction? Why a nail gets magnetized when kept close to magnet? Why two pins get attracted by bar magnet maintain distance between ends?
Answer:
Compasses are mainly used in navigation to find direction on the earth. This works because the Earth itself has a magnetic field which is similar to that of a bar magnet. The compass needle aligns with the Earth's magnetic field direction and points north-south. Also, In a magnet all the domains are oriented in the same direction. In the case of a nail, the domains can be aligned in the same direction causing the nail to become magnetic. That is because if you hang a bar magnet from a thread, the north pole will point to magnetic north. When you bring one north pole close to another north pole they repel each other. You can feel the two magnets pushing each other apart.
Fill in the blank. Bones fitted together in the shape of a give the human body structure.
Answer:
skeletal system
Explanation:
hope its the right answer:))
Answer:
top
Explanation:
an athlete runs around a 400m race track four times it takes him 400s to complete his run
Answer: its taking him 100s to run around the track once
Explanation:
why is unit of force called derived unit
Answer:
because these units are derived from combinations of two or more of the seven base units
A city bus travels six blocks east and eight blocks north east wok is 100 m long is a bus travels as distance and 15 minutes what is the average speed on the bus
Answer:
the average speed on the bus = 1.55 m/s
Explanation:
From the information we are being provided with ;
a city block travels 6 blocks due east
and 8 blocks due north
the length of the individual blocks = 100m
As such their respective distance will be
distance (d) traveled due east direction by bus = 6 × 100 = 600 m
distance (d) traveled towards the north direction by bus = 8 × 100 = 800 m
The total distance covered = (600+ 800)m
= 1400 m
However, it requires 15 minutes to travel this distance by bus.
Thus,
the average speed = distance/ time
the average speed on the bus = 1400 m / (15 × 60) s
the average speed on the bus = 1400 m / 900 s
the average speed on the bus = 1.55 m/s
What is the kinetic energy of a 150 kg object that is moving at a speed of 5
m/s?
Answer:
Kinetic Energy=1/2×m×v^2,Where m=mass,v=velocity. So, kinetic energy of the object=1/2×150×15^2 = 16875 kg m^2 s^-2 .
Explanation:
math lol
Which refers to the ends of a magnet where the forces are strongest?
A) attracting forces
B) opposing forces
C) magnetic fields
D) magnetic poles
A material that produces magnetic field are called magnets. Magnetic poles refers to the ends of a magnet where the forces are strongest.
What are magnetic poles?Magnetic poles are the regions at each end of a magnet where the external magnetic field is strongest.
A bar magnet suspended in the Earth's magnetic field orients itself north-south. A north magnetic pole is the north-seeking pole of such a magnet or any similar pole.
Thus, the correct option is D.
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Answer:
D magnetic poles-
Explanation:took test
Help me please it due today at 11:59 pleasss
Answer:
see below
Explanation:
1. density = mass / volume
2. kg/mL, g/cm³
3. volume = mass / density
4. mass = density x volume
5.
d = m / v
d = 32.9 g / 45.78 mL
d = 0.72 g/mL
6.
vol = m / d
vol = 0.62 g / 120g/cm³
vol = 0.00517 cm³
7.
m = v * d
m = 2.07 g/mL * 60.9 mL
m = 126.063 g
A ray of light strikes a plane mirror at an angle of incidence of 60°, is reflected from the mirror and then strikes a second plane mirror placed so that the angle beftween the mirrors is 45°. The angle of reflection at the second mirror, in degrees, is
A 15
B 25
C 45
D 65
E 75
plz help me guys ASAP!
Answer:
60 - 45 = A. 15
Explanation:
Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.
60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.
What is Plane mirror?A flat or highly polished surface called a plane mirror reflects light or waves to create an image. It is a polished, smooth surface that creates a virtual representation of the actual object.
A plane mirror is a surface on which an image can only be produced by at least two light beams. The intersection of these two beams can occur inside the mirror or appear to occur somewhere behind the mirror.
The image that follows illustrates how an object appears when viewed via a plane mirror.
Therefore, 60 - 45 = A. 15. Subtracted because the plane mirror at an angle is incidence of 60°, so then in order to find the value it would be 60-45 and not adding it or dividing and multiplying to find the value thus the answer is 15.
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A 2011 Porsche 911 Turbo S goes from 0-27 m/s in 2.7 seconds. What is the
car's acceleration?
0 to 60 mph in 4.5 seconds
Explanation:
The world record for the fastest train on Earth was set by abullet train from Tokyo to Osaka in Japan. Without passengers,it can travel at a speed of 300 km/hr. How many centimeters
per second can it travel?
cm/sec. *round to nearest whole number *
Answer:
8333
Explanation:
300km/hr = 300/60 = 5 km per min
5km/min = 5/60 = .08333333km per sec
km to cm = 100000, so
.083333 * 100000 = 8333
The train would travel at a speed of 8333.33 centimeters/second.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.
As given in the problem the world record for the fastest train on Earth was set by a bullet train from Tokyo to Osaka in Japan. Without passengers, it can travel at a speed of 300 kilometers/hour,
1 kilometer = 1000 meters
1 meter = 100 centimeters
300 kilometers = 300×100000 centimeters
the speed of the fastest train = 300×100000 centimeters /3600 seconds
= 8333.33 centimeters/second
Thus, the speed of the fastest train would be 8333.33 centimeters/second
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A 0.5 kg yellow bouncy ball rolls to the right at a speed of 8 m/s while a 0.25 kg blue bouncy ball rolls
to the left towards it with a speed of 4 m/s. After the collision, the blue bouncy ball rolls to the right
with a speed of 12 m/s. How fast is the yellow ball rolling and in what direction?
Explanation:
Let yellow ball be m1 = 0.5kg with u1 = 8 m/s and blue ball be m2 = 0.25 kg with u2 = - 4 m /s respectively.
After collision, blue ball travels 12 m/s.
Using conservation of Linear Momentum :
m1u1 + m2u2 = m1v1 + m2v2
0.5* 8 + 0.25 * - 4 = 0.5 * v1 + 0.25 * 12
v1 = 0 m/sec i.e. Yellow ball comes to rest.
What is the momentum of A 200 kg shark swimming at 15 m/s
Answer:
3000 kg meter per sec
Explanation:
Momentum of an object refers the motion of an object. Momentum depends upon mass and velocity both.
Formula to calculate the momentum of any object is,
Momentum = Mass × Velocity
By substituting values of mass and velocity of the shark from the question,
Momentum of shark = 200 × 15
= 3000 kg meter per second
Therefore, shark weighing 200 kg has the momentum as 3000 kg meter per seconds.
A fleeing student covered a distance of 210 meters in 35 seconds. what is the student's speed in meters/second? what is the student's speed in meters/minute?
Explanation:
Given that,
A student covered a distance of 210 meters in 35 seconds.
We need to find the student's speed in meters/second and also in meters/minute.
Speed, v = distance (d)/time (t)
So,
[tex]v=\dfrac{210\ m}{35\ s}\\\\=6\ m/s[/tex]
We know that, 1 minute = 60 seconds
[tex]6\dfrac{m}{s}=6\times \dfrac{m}{(\dfrac{1}{60})\ \text{minutes}}\\\\=360\ \text{meters/minutes}[/tex]
Hence, the student's speed is 6 m/s or 360 meters/minute.
Two forces are applied to a car in an effort to accel-
erate it,
a. What is the resultant of these two forces?
b. If the car has a mass of 3200 kg, what accelera-
tion does it have? Disregard friction
Answer:
R=2F
Explanation:
As the forces are in same direction so the resultant force will be:
R=F+F
R=2F
Three balls are used to model the Sun-Earth-Moon system. Which statement describes a benefit of this model?
Options are not given in the question, so the complete question is as follows:
Three balls are used to model the Sun-Earth-Moon system. Which statement
describes the benefit of this model?
A. The model shows only how eclipses happen.
B. It shows information about a system too large to be studied easily.
C. It shows information about a system too fast to be studied directly
D. The model can be used for the entire solar system.
Answer:
B. It shows information about a system too large to be studied easily.
Explanation:
The use of balls in the model makes it easy to understand the large solar system.
The solar system is comprised of the sun, moon, planets, and other celestial bodies. The model using three balls makes it easy to understand a large system. Using these balls many things about the solar system can be learned such as the position of the Sun-Earth-Moon, the phenomenon of rotation and revolution, and eclipses.
So, the given models show that a large solar system can be studied easily.
Hence, the correct option is "B".
Answer:
B. It shows information about a system too large to be studied easily.
Explanation:
how long a boy will take to run round a square field of side ,35 if he run at the rate of 9km/hr
Answer: it will take 15 minutes
Answer:
It will take the boy 136 hours 11 minutes.
Explanation:
35 × 35 = 1225km is the area of the square.
Now find how long it will take the boy:
1225 ÷ 9 = 136.11
Which is 136 hours 11 minutes.
Which of the following is NOT a reason why
mathematics is valuable in science?
If a bullet with an acceleration of 1.5 m/s2 takes 2 seconds to leave the muzzle of a rifle (starts at rest), what was the length of the rifles barrel?
Answer:
The length is [tex]D =3 \ m [/tex]
Explanation:
The velocity of the bullet is mathematically evaluated as
[tex]v = a * t [/tex]
=> [tex]v = 1.5 * 2 [/tex]
=> [tex]v = 3 \ m/s [/tex]
Now from kinematic equation
[tex]v^2 = u^2 + 2* a * D[/tex]
Here D is the length of the barrel and u = 0 m/s
So
[tex]3^2 = 0 + 2* 1.5 * D[/tex]
[tex]D = \frac{9}{3} [/tex]
[tex]D =3 \ m [/tex]
If the weight of displaced liquid and the weight of an object are the same, the object will:
(A) sink
(B) float
(C) float, but partially submerged
Answer:
c
Explanation:
I think but if I'm wrong I'm sorry
Answer:
i think its float
Explanation:
what was Galleos contribution to the study of motion ?
Answer:
B ) He was the first to systematically study force and motion.
Explanation:
I seen this one before and know the answer since there's 4 options
A truck covers 40.0 m in 7.10 s while uniformly slowing down to a final velocity of 2.05 m/s.
(a) Find the truck's original speed. _______ m/s
(b) Find its acceleration. __________ m/s^2
Answer:
(A) Original speed= 9.22 m/s
(B) Acceleration= -1.0099 m\s^2
Explanation:
A truck covers 40m in 7.10 secs
The truck slows down at a uniform velocity of 2.05 m/s
(A) The original speed can be calculated as follows
Vo= 2(40)/7.10 - 2.05
= 80/7.10 - 2.05
= 11.2676 - 2.05
= 9.22m/s
(B) The acceleration can be calculated as follows
a= Vf-Vo/t
= 2.05-9.22/7.10
= -7.17/7.10
= -1.0099m/s^2
Which accident will be more damaging, collision between two trucks
moving with a speed 50 km/hr or collision between two cars moving with a speed of 50 km/hr? Explain.
Answer:
collision between truck
Explanation:
Answer. Collision between trucks, because more is the mass, more is the inertia and therefore more is the momentum. Mass of the trucks is more than that of cars so collision of trucks will cause more damage.