Complete question :
A car accident my rolls off a cliff as it leaves the cliff it has a horizontal velocity of 13 ms it hits the ground 60 m from the shoreline calculate the height of the cliff
Answer:
104.59 m
Explanation:
Given that:
Horizontal Velocity = 13 m/s
Horizontal distance = 60 m
To obtain the height of the cliff :
We use the Relation :
S = ut + 0.5at²
t = time ; u = initial velocity ; S = height
To obtain t ;
Speed = distance / time
Horizontal distance / speed = time
Time = 60 / 13
Time = 4.62 seconds
The height of cliff :
u = 0
Hence ;
S = ut + 0.5at²
S = 0 + 0.5(9.8) * 4.62^2
S = 104.58756
Height of cliff = 104.59 m
A 7.2 kg bowling ball is accelerated with a force of 112,5 N.
What is the acceleration of the bowling ball?
Answer:
15.625 m/s
Explanation:
112.5/7.2 = 15.625 m/s
Would you do more work moving 100 boxes weighing 12N for 1m or moving a 1000N box, 30cm? Support your answer.
Answer:
The second box
Explanation:
Work done is the force applied to move a body through a particular distance.
Work done = Force x distance
For the first box:
Weight = 12N
Distance = 1m
Work done = 12 x 1 = 12J
For the second box;
Weight = 1000N
Distance = 30cm = 0.3m
Work done = 1000 x 0.3 = 300J
The second box has a higher work done.
A force of 50 N begins to move a block of wood weighing 100 N on a
rough horizontal surface. Find the coefficient of static friction
Answer:
0.5
Explanation:
From the question given above, the following data were obtained:
Force (F) = 50 N
Weight (W) = 100 N
Coefficient of static friction (μ) =.?
The coefficients of static friction (μ) is simply defined as the ratio of force (F) to the normal reaction (N). Mathematically, it can be expressed as:
μ = F / N
With the above formula, we can obtain the coefficient of static friction as follow:
Force (F) = 50 N
Weight (W) = 100 N
Coefficient of static friction (μ) =.?
μ = F / W
μ = 50 / 100
μ = 0.5
Thus, coefficient of static friction is 0.5
A box that weight 1000 N is lifted a distance of 20.0 m straight up by a rope and pulley system . The work is done in 10.0 seconds what is the power devloped
Answer:
P = 2,000 W
Explanation:
Work and Power
Work is the amount of energy transferred by a force over a distance. It's a scalar quantity, with SI units of joules.
If both the force F and displacement s are parallel, then we can use the equivalent scalar formula:
W=F.s
Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.
The power can be calculated as:
[tex]\displaystyle P=\frac {W}{t}[/tex]
Where W is the work and t is the time.
A box with a weight of 1,000N is lifted by s=20 m by a rope and pulley system. The system exerts a force equal to the weight of the box, thus F=1,000 N. The work done by the system is:
W =1,000 N * 20 m
W = 20,000 J
Now we calculate the power developed by the system in t=10 seconds:
[tex]\displaystyle P=\frac {20,000}{10}[/tex]
P = 2,000 W
HELP PLZ!!! what’s the answer?
A box is pulled along a floor by a force of 3.0 N. The friction acting on the box is 1.0 N, as shown. How much kinetic energy does the box gain in moving 2.0 m
Answer:
4 J
Explanation:
From the image attached, we can see 2 horizontal forces acting on the box albeit in opposite directions.
Now, the net force will be;
F_net = 3 - 1
F_net = 2 N
To move a distance of 2 metres, kinetic energy is;
K.E = Force × Distance = 2 × 2 = 4 J
Answer these questions correcty first who answers it all correct gets cash
Answer:
I am extremely sorry, but I cannot answer your questions, because there aren't any.
Explanation:
I don't see any questions, or else my eyes are not working properly.
Calculate the speed of a car that travels 250 miles in 4.0 hours. (remember your unit)
a sound wave has a frequency of 20 Hz and a wavelength of 100 m. what is the wave speed? a) 2000m/s b) 100m/s c)50 m/s d)0.20 m/s
Answer:
A. 2000 m/s
Explanation:
Please help me
An automobile is driving uphill. Which form of energy is not involved in this process?
electromagnetic
potential
kinetic
chemical
An automobile is driving uphill. Which form of energy is not involved in this process?
Choosing:electromagnetic
potential
kinetic
chemical
Answer:Electromagnetic
#READINGHELPSWITHLEARNING #CARRYONLEARNING #STUDYWELLAnswer:Electromagnetic said the person above me wait AYO HEAR ME OUT-
What does the number of valence electrons an atom has have to do with whether the atom
will gain electrons or lose electrons?
Answer:
A valence number of 1 means that an alement will generally react to lose one electron to obtain a full outer shell.
Group two elements are assigned a valence number of 2. A valence number 2 means that a group two elements will generally react to lose two electrons to obtain a full outer shell.
Explanation:
Hope it helps
A geosynchronous orbit is an orbit in which the satellite remains over the same spot on the planet
Answer:
Yes, the electromagnet still affects the compass needle.Explanation:
the electromagnet still affects the compass needle.These types of electromagnetic waves are listed in order of decreasing
frequency: gamma rays, visible light, infrared, and radio. Which type has the
greatest energy?
A. Radio
B. Infrared
C. Visible light
D. Gamma rays
ill mark as brainliest if given the option
Answer:
[tex]36 g/cm^{3}[/tex]
Explanation:
In order to find the density, the problem says we need to find the volume first.
Since we know that the sample of gold is a perfect cube, we know that the side lengths will all be the same. Since all the side lengths will be 3, we can take that value and cube it to find the volume.
[tex]3^{3} = 27[/tex]
Now that we know the volume is 27 cm³, we can solve find the density.
[tex]Density = \frac{Mass}{Volume}[/tex]
[tex]Density = \frac{972g}{27cm^{3} } = 36 g/cm^{3}[/tex]
Therefore, the density of the sample is 36 g/cm³.
What are atoms doing that cause fireworks to change colors
Answer:
Heating atoms causes electrons to move from their ground-energy level to a higher energy level. When the excited electrons move to a lower energy level, they emit light with a specific energy and characteristic color.
Explanation:
Look it up
A distinct chemical reaction leads to the varied colors we perceive. Below you may find a further explanation.
The colors of explosions generated through the usage of metal salts were indeed distinct from table salts as well as chemical 'salt' corresponds toward any metallic or non-metallic compound's atomic complex.Several of these chemicals generate strong burning colors, making them suitable for explosives materials.Learn more about atoms here:
https://brainly.com/question/18327624
Newton’s second law: The acceleration (a) of an object is directly proportional to the force on the object (F) and inversely proportional to its mass (m).
F < The greater the force, the greater the acceleration
a = -- OR F=ma
M< The greater the mass the less the acceleration
Answer:
there is the answer
Explanation:
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.
How long does it take a earth to rotate on its axis?
Answer:
23 hours, 56 minutes about 24 hours
Explanation:
(Im sorry if this is wrong please correct me if so. Good Luck)
true or false
one ton is equal to 10 quintal
Answer:
True
Explanation:
1 ton = 10 quintals
blank is a measure of the percentage of water vapor in the air in a particular area
a. temperature
b. dew
c.point
d. relative humidity
Answer:
Relative humidity is a measure of the percentage of water vapor in the air in a particular area
Answer: relative humidity
Explanation:
Which of the following diagrams correctly shows the electron configuration of Sulfur, with atomic number 16?
Diagram A
Diagram B
Diagram C
Diagram D
Answer:
Diagram C
Explanation:
We are given that Sulfur with atomic number 16.
We have to find that which diagram shows the electronic configuration of sulfur.
S=16
Its Diagram C
EARS: Two ears (E) is dominant to one ear (e). Both parents are heterozygous.
Answer:
what's the question
Explanation:
I don't understand the question
A car accelerates from rest in a straight line. During the first 14s, the acceleration is uniform and the car reaches the speed of 25m/s. Calculate the acceleration of the car.
Answer:
25/14 ms-1
Explanation:
apply V=U+AT
A speed boat travels 200 miles at a speed of 20 miles/hr. How much time will it take to
travel the 200 miles?
Answer:it will take 10 hours
Explanation: The way we get this answer is if the boat travels 200 miles at 20 mph that means that every 20 miles the boat traveled an hour would pass. Using this we can see that 20 fits into 200, 10 times, meaning that the time it would take to travel would be 10 hours.
The time it will take to travel 200 miles is 10 seconds
The calculation can be done as follows
= 200/20
= 10 seconds
Hence the amount of time it will take the speed boat to travel 200 miles is 10 seconds
Please see the link below for more information
https://brainly.com/question/18322054?referrer=searchResults
Sandra takes a class field trip to a geology museum. She sees an interesting sample of igneous rock. She wonders if the material in this rock sample could have come from a sedimentary rock formation at Earth’s surface millions of years ago. Is this possible? Can sedimentary rock change into igneous rock?
Answer:
Yes
Explanation:
It is possible for sedimentary rocks to be converted to igneous rocks. Under conditions of high temperature and pressure, sedimentary rocks can be broken down into igneous rock by melting this rock type.
When the rock is broken down, it forms melt which when cooled and solidifies will form igneous rocks.
Sedimentary rocks are formed from the breaking down of pre-existing rocks through the action of weathering, erosion and sediment transportation. Within a basin, the sediments are compacted and lithified.
When this is subjected to intense pressure and temperature, the rock hardens and might further break down to melt.
Please do #24
24. What is the benefit the Hubble’s ability to detect infrared radiation?
Answer:
i think its D Or maybe C not sure rly
Can you answer my questions. Please help me
Answer:
answered it.................
drop a paper a piece of thermocol and a piece of plastic from a height of 10 to 15 feet not the time for each object to hit the ground why does paper take more time than thermocol and thermocol more than the plastic piece make the paper to fell down in such a way that it should hit the ground before all of them and how does it happen
Answer:
Explanation:
According to Newton's law of gravitation , all objects should take same time to fall from same height , but it does not happen when we see a paper , a thermocol and a plastic paper to fall .
It happens due to air resistance . In case of paper , this is most pronounced , so it falls slowest . In case of plastic paper , the resistance is least so it falls fastest .
If we squeeze the piece of paper to make a lump so that it does not remain flat , it will fall the fastest , because in this case the air resistance on it becomes the least .
Time and velocity are both vectors T/F
In which of the following would you find the highest population density?
Question 1 options:
A. In a region with little to no rainfall
B. Along the Amazon River
C. In the peak of the Andes Mountain
D. In the Atacama Desert
get the right answer and i will give you points
I would think B, along the Amazon River. This is because of the warm climate ad lots of rainfall.
What might a scientist who studies thermodynamics experiment with in order to better understand cold
Answer:
A scientist who studies thermodynamics might experiment with the instant ice packs where you have to pop a bag on the inside to create a chemical reaction to make it cold.
