Answer:
4.66m/s
Explanation:
Given parameters:
Initial velocity = 4.8m/s
Acceleration = -0875m/s²
Length of the ramp = 0.75m
Unknown:
Final velocity = ?
Solution:
To solve this problem, we apply the right motion equation;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance = length of ramp
Insert the parameters;
V² = 4.8² + 2(-0.875)0.75
V² = 23.04 - 1.31
V² = 21.73
V = √21.73 = 4.66m/s
the velocity of a car changes from 5 m/s to 20 m/s in 30 sec the acceleration?
Answer:
0.5m/s2
..............
plz help i really need this
Answer:
The reactivity of metals increases as you move left in a period and as you move down in a group, so Marie needs to know the period and group of the element inside each box. Boxes that show locations in groups 1 or 2 or in period 8 contain the most reactive elements.
Explanation:
Answer:
The Group Number of the elements.
Explanation:
If Marie knew the group number of the elements, then she could determine the amount of valence electrons each element has and their reactivity rate. For example, if one box tells her that an element is located in group 18, then she could determine that the element is not very reactive. This is because elements in group 18 have 8 valence electrons, which makes them stable/unreactive.
Hope this helps!
4. The chart shows melting and boiling points of
different substances.
Melting and Boiling Points
Substance
Alcohol
Formaldehyde
Nicotine
Benzene
Nitroglycerine
Melting Point ("C) Boiling Point ("C)
-114
78.2
-92
-19
-79
247
5.5
80
13.5
250
Which substance freezes at the lowest
temperature?
A. Alcohol
B. Nicotine
C. Formaldehyde
Answer:
The correct option is A
Explanation:
Firstly, it should be noted that the freezing point of a substance can be assumed to be melting point of that substance because a substance will normally change from liquid to solid (freezes) at the same point it changes from solid to liquid (melts). For example, water freezes at 0°C and also starts melting at 0°C.
Thus, the substance with the lowest melting point among the substances mentioned in the question is alcohol (ethanol) with the melting point of -114°C. Hence, ethanol also has the lowest freezing point thereby freezing at the lowest temperature.
a motorcycle starts from rest covers 200 meter distance in 6 second calculate final velocity and acceleration
Explanation:
s = ut + 1/2 a t^2
200 = 0 * 6 + 1/2 * a * (6)^2
200 = 1/2 * a * 36
200 = 18 a
a = 200/18
a= 11.1m/sec^2
v = u + at
v = 0 + 11.1 * 6
v = 66.6m/s
hope it helps you
Could you help me please !!!
A tin of paint has a total mass of 7000g and a volume of 5000 cm³. The empty tin has a mass of 500g. Determine the mass of paint.
Answer:
6500g
Explanation:
7000 - 500 = 6500
The mass of paint will be "6500 g".
Given:
Total mass,
7000 gVolume,
5000 cm³Mass of empty tin,
500 gNow,
The mass of paint will be:
= Total mass - Mass of empty tin
By putting the values, we get
= [tex]7000-500[/tex]
= [tex]6500 \ g[/tex]
Thus the approach above is correct.
Learn more:
https://brainly.com/question/25002441
If a bicyclist travels at 15 km/hr, how long will it take her to travel 30 km?
Answer:
The answer is 2 hoursExplanation:
To find how long it took we use the formula
[tex]t = \frac{d}{v} \\ [/tex]
d is the distance
v is the velocity
From the question we have
[tex]t = \frac{30}{15} \\ [/tex]
We have the final answer as
2 hoursHope this helps you
The rate of change in position at a given point in time
Answer:
Velocity
Explanation:
The rate of change in position at a given point in time is called velocity.
Intermolecular force is stronger than the kinetic energy in?
Answer:
If the average kinetic energy is greater than the attractive forces between the particles, a substance will not condense to form a liquid or a solid. If the kinetic energy is less than the attractive forces, a liquid or solid will form.
Explanation:
Halp meeeeeeeeeeeeeeeeee
Answer:
1º all
2º 1
3º 2
4º the same
Explanation:
In order for convection to transfer heat, particles need to
absorb solar and fossil energy
circulate and move within a liquid or gas
make contact with the heat source
transmit electromagnetic waves
Answer:
the answer is b as cenvection only occurs through movement of liquids and gases
Explanation:
Answer:
the answer is b
Dorji weight 1500n.if the total surface area of soles of his feet is 0.5 m2 what is the pressure exerted by his body on the ground
Answer:
P = 3000 Pa
Explanation:
Weight of Dorji, W = F = mg = 1500 N
The total surface area of soles of his feet is 0.5 m²
We need to find the pressure exerted by his body on the ground. The pressure is equal to the force acting per unit area. So,
[tex]P=\dfrac{1500\ N}{0.5\ m^2}\\\\=3000\ Pa[/tex]
So, the pressure exerted by his body on the ground is 3000 Pa.
It takes 50 seconds for Tyler to do 450 Joules of work. How much power did Tyler use?
Answer:
Power = 450 Joules / 50 seconds = 9 J/s = 9 W *average* power
Explanation:
Power = Energy / Time ( or Work / Time) just as Velocity = Distance / Time
So, the average power needed for 50 seconds to do 450 Joules of work is simply 450 J / 50 s = 9 J/s = 9 Watts (The unit Watt is defined so that 1 Watt = 1 Joule / Second). It's important to note that 9W is the *average* power. The problem does not say that Tyler does work at a constant rate, so it's worth adding that caveat to the answer!
A motorcyclist sees a branch in the road and hits the brakes, slowing down at -6.42 m/s. if it takes him 2.85 seconds to stop, what was his starting velocity?
Use the definition of average acceleration:
a = ∆v / t
If v is the starting speed, then ∆v = 0 - v, so solve for v :
-6.42 m/s² = (0 - v) / (2.85 s)
v = (6.42 m/s²) (2.85 s)
v ≈ 18.3 m/s
State the career function of computer engineering
Answer:
Computer engineer duties include doing research on software and computer hardware. Designing and testing computer hardware components. Like processors, circuit boards, memory devices and routers. Writing and testing software mobile devices and computers.
Explanation:
Answer:
Computer engineer duties include: Conducting research on software and computer hardware. Designing and testing computer hardware components, such as processors, circuit boards, memory devices and routers. Writing and testing software for mobile devices and computers.
Explanation:
an athlete of mass 70kg runs at a velocity of 6ms5-1 calculate the kinetic energy of the athlete.
What are the three stages of matter and how?
Answer:
Solid, Liquid and Gas
Explanation:
They are the 3 states or stages of Matter
how can you show that pressure increases with the increase of force?
Answer:
...........................
You travel from Point A to Point B to Point C. What is your
displacement?
7 m
3 m
4m
5 m
12 m
Answer:
12m is your displacement
Answer:
5
Explanation:
Its a shortcut from A to C........I think
A space shuttle travels around the Earth at a constant speed of 28000 kilometers per hour. If it takes 90 minutes to complete one orbit, how far is its journey around Earth?
42000 kilometers
Explanation:
distance is velocity × time
28000 ×1.5
42000
remember to match units
thats why i wrote 1.5 hours instead of 90minutes
Which event happens FIRST in the presidential election process?
A. The president is chosen by popular vote.
B. Americans vote for electors.
C. All 50 governors prepare their states' Certificates of Ascertainment.
D. Congress gathers to count the electoral votes.
activity 1 more or less, pls answer this ASAP
Answer:
ididate is a good one and
The convection zone is the outer most layer of the suns blank hot gases rise and then blank hear the loops form by singing cool gas causes blank to move towards the sun surface
Answer:
Explanation:
The sun is made up of 6 parts. Namely:
The coreThe radiation zoneThe convection zoneThe photosphereThe chromosphere and The coronaThe convection area is just above the radiation zone. As materials from the suns core are heated, they rise above the radiation zone towards the EDGE of the convection area then sinks back again into the radiative zone for more heat.
The radiative zone is 12.6 million Fahrenheit hot and is just above the core.
The core of the son is not solid but plasma whose motion is like gas. Its temperature stands at 48 million Fahrenheit
Cheers
What do signal trainees do
Answer:
A signal apprentice works for a rail company, learning the duties of a signal maintainer through on-the-job training and experience. As part of this apprenticeship, you work on a railway to assist a seasoned signal maintainer as they install, repair, inspect, and test signal equipment.
Explanation:
Which word fits in this sentence:
A __________ is how long it takes for one of the planets to go around the sun one time. Earth takes 365.25 days to go around the sun one time. We call this a _______.
A: revolution, year
B: year, revolution
Answer:
B because thats the answer
If a 50 N force was applied to a really massive object as well as a tiny object, what can you say
about the object's acceleration?
Answer:
The tiny object's acceleration will be much greater.
Explanation:
Because of Newton's second law of motion, (which is F=ma or Force= Mass*acceleration), then if the force maintains the same (which in this case it does, because it says 50 N to both obejcts) and one mass was much greater than the other, then the ould be less for the more massive object and much greater for the lighter object.
For example: If 50 N were applied to a 500 kg object and a 50 kg object, then theformulas for each (respectively) are:
50 = 500*acceleration
and
50 = 50*acceleration
(Because of Newtons Second Law of Motion)
Then, solving for the equations, we get for equation 1:
Acceleration = .1 m/s^2
And for equation 2:
Accleration = 1 m/s^2
Thus, you can see that more massive objects (when applied he same amount of force as the smaller object) clearly have less accleration than the smaller objects.
What were the three factors that affected density
Answer:
Pressure, temperature and humidity all affect air density. And you can think of air density as the mass of air molecules in a given volume.
Explanation:
Kinetic energy is the energy an object has due to its
Answer:
potential energy or stored energy
Explanation:
Answer:
Motion
Explanation:
Edge2021
Un automóvil circula a una velocidad de 60 km/h durante 1 hora y 15 minutos, después se para durante 5 minutos y luego regresa hacia el punto de partida a una velocidad de 10 m/s durante 45 minutos. Halla: a) La posición final. b) La distancia recorrida. c) La velocidad media.
Answer:
(a) 48 km
(b) 102 km
(c) 48.96 km/h.
Explanation:
Assuming that at first, the car travels from point A to point B, then the cat returns from point B to point C.
As the car traveled from point A to point B in 1 hour 15 minutes with a speed of 60 km/h.
Using distance = speed x time, so
Distance traveled from A to B is
[tex]d_{AB}= 60 x 1.25=75[/tex] km [ as time = 1 h 15 min = 1.25 h]
Stop time at point B is 5 minutes.
For the return journey, from point B to C:
Speed = 10 m/s
Time = 45 minutes = 45 x 60 seconds = 2700 seconds
Distance traveled from point B to C is
[tex]d_{BC}=[/tex] 10 x 2700 = 27000 meters
as 1000 meters = 1 km, so
[tex]d_{BC}=[/tex] 27 km.
(a) The final position of the car from the starting point A is the distance between points A and C.
[tex]d_{AC}=[/tex]75 -27=48 km.
Hence, the car is 48 km away from point A.
(b) Total distance traveled,
[tex]d= d_{AB}+d_{BC}=[/tex]75+27=102 km.
(c) Total time taken
t= 1.25 hour + 5 minutes + 45 minutes
= 5/4 hour + 5/60 hour + 45/60 hour [ as 1 hour = 60 min]
=25/ 12 hours.
Total distance traveled, d= 102 km [ from part (b)]
Average speed = (Total distance traveled)/(Total time taken)
=102/ (25/12)= 48.96 km/h.
Hence, the average speed of the car is 48.96 km/h.
Name 2 fundamental units of SI system except that of MKS system.
The others are:
Ampere
Mol
Candela
Answer:
Ampare mole candelahope it is helpful to you
18. How much force would it take to push another, larger friend who has a mass of 70 Kg to accelerate
at the same rate of 4 m per sec every sec
Answer:
280N
Explanation:
f = mass x acceleration