Answer:
73.152cm
Explanation:
We have been given:
0.8yards of rain
Problem, convert to cm = ?
Solution:
The problem deals with the conversion from one length dimension to another.
So:
1 yard = 91.44 cm
So 0.8 yards = 0.8 x 9.44 = 73.152cm
The solution to this problem is 73.152cm
The athlete at point A runs 150m east, then 70m west and then 100m east. Determine the resultant displacement of the athlete relative to point A
Answer:
180m to the east
Explanation:
Displacement is the distance traveled in a specific direction. It is a vector quantity with both magnitude and direction. Therefore, the start and finish position is very paramount.
point A runs 150m east,
70m west
100m east
150m
--------------------------------------------------------→
70m
←---------------------
100m
-----------------------------------→
The displacement of the athlete = 150 - 80 + 100 = 180m to the east
According to the question,
Point A runs:
150 m (east)70 m (west)100 m (east)Now,
The displacement will be:
= [tex]150-80+100[/tex]
= [tex]250-80[/tex]
= [tex]170 \ m \ (east)[/tex]
Thus the answer above is correct.
Learn more about displacement here:
https://brainly.com/question/21116279
A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A 140-N force is applied to the box. What is the frictional force on the box?
Answer:
161.7N
Explanation:
Given parameters:
Mass of the box = 55kg
Coefficient of friction = 0.3
Applied force = 140N
Unknown:
Frictional force on the box = ?
Solution:
The frictional force on the box is a force that opposes the motion of the box.
To find the value of this force;
Fr = u m g
u is the coefficient of static friction
m is the mass
g is the acceleration due to gravity
So;
Fr = 0.3 x 55 x 9.8 = 161.7N
True or false: in our solar system, only the sun creates radio waves
A boat travels north at a rate of 25.0 kilometers per hour (km/hr) relative to the current of the river. The current of the river moves south at a rate of 10.0 km/hr relative to the ground. What is the rate of motion of the boat relative to the ground?
Answer:yes
Explanation:yes
The melting point of a substance is the same as its _____ point.
evaporation
sublimation
freezing
boiling
Answer:
Boiling point
Explanation:
If I double the amount I stretch a spring, what happens to its EPE
A. Doubles
B. Halves
C. Quadruples
D. Quarters
One degree of longitude at the equator is approximately 111 km. As we move north or south the size of a degree changes. What is the distance that each degree of longitude has at the poles?
ALL of the meridians of longitude converge (come together) at the North and South poles. So at a pole, the distance between different longitudes is ZERO.
if you're standing at the North or South pole, you're located at EVERY longitude, because any other longitude is zero distance from you.
You're also located at NO longitude. Because . . .
==> If you're standing at the North pole and you take one step, it doesn't matter what direction you stepped, you've moved South. All directions from the North pole are South.
==> If you're standing at the South pole and you take one step, it doesn't matter what direction you stepped, you've moved North. All directions from the South pole are North.
how can Magnets cause objects to have kinetic energy?
SOMEONE PLZ HELP!!!! Lots of points
Answer:
If there is a system of magnets being held in place, there is potential energy. When you let go, the potential energy converts to kinetic energy and the magnets move. Putting the system of magnets close together which creates an opposing force.
Explanation:
Magnets cause objects to have kinetic energy by the magnetic force present in the magnet.
Magnets is a material which has a strong magnetic field which attracts ferromagnetic substances such as nickle, iron etc.
When a ferromagnetic objects put near the magnet, the magnet attracts the object and causes the movement towards its direction.
Therefore, magnets cause objects to have kinetic energy by the magnetic force present in the magnet.
To know more about magnets,
https://brainly.com/question/19542022
Radiation can affect living cells. Which of the following uses of radiation is a non-example of this fact?
A. Treatment of cancer
B. Dating fossilized stone
C. Preservation of fresh fruits
D. Sterilization of medical equipment
What is the downward pull on an object due to gravity?
mass
weight
acceleration
velocity
Answer:
Weight
Explanation:
WEIGHT - downward pull to the center of earth due to gravity
ACCELERATION - the rate of change of velocity
VELOCITY - rate of change if displacement in time
The major difference between the mass and weight is that mass of an object can never be zero but weight can be zero. The downward pull on an object due to gravity is called the weight. The correct option is B.
What is weight?The measure of the force of gravity acting on a body is defined as the weight. Actually weight is a force and its SI unit is Newton (N). The weight of an object depends on the mass and acceleration due to gravity.
The formula used to calculate the weight is:
w = mg
m = Mass of an object
g = Acceleration due to gravity
Weight is found to be a vector quantity. Because it has both magnitude and direction. It is directed towards the center of the earth or other gravity well.
When objects fall to the ground, it is the gravity which accelerates them. So the force of gravity which pulls the object downward is called the weight.
Thus the correct option is B.
To know more about weight, visit;
https://brainly.com/question/30189157
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Where on the electromagnetic spectrum can you find infrared waves? Compare to gamma, x-ray, ultraviolet, and light waves.
Answer:
Infrared, Visible light, UV light, X-ray, gamma
Explanation:
If an object travels 230 km in 4 hours, what was the speed of the object? (speed = distance/time)
Answer:
Can you explain this?
Explanation:
Can you explain this?
Plants are eaten by grasshoppers, which are eaten by mice, which are eaten by snakes.
Answer:
food chain / web lol? was this a question?
Food labels often indicate energy in joules and calories. A jar of jam contains 1030 kJ (245 kcal).
Check if that is correct.
Answer:
It is not correct.
The correct conversion is:
1030 KJ = 246.18 KCal.
Explanation:
To know if 1030 KJ is equivalent to 245 KCal, we shall convert 1030 kJ to kcal. This can be obtained as follow:
4.184 KJ = 1 KCal
Therefore,
1030 KJ = 1030 KJ × 1 KCal / 4.184 KJ
1030 KJ = 246.18 KCal.
Thus, 1030 KJ is equivalent to 246.18 KCal.
From the above calculation, we can see that:
1030 KJ ≠ 245 KCal
Rather,
1030 KJ = 246.18 KCal.
A suitcase with a mass of kg 2 has a weight of 18n on a particular planet. What is the acceleration due to gravity on that planet
Answer:
[tex]9\ \text{m/s}^2[/tex]
Explanation:
m = Mass of the object = 2 kg
W = Weight of the object = 18 N
g = Acceleration due to gravity
Weight of the an object is given by
[tex]W=mg[/tex]
[tex]\Rightarrow g=\dfrac{W}{m}[/tex]
[tex]\Rightarrow g=\dfrac{18}{2}[/tex]
[tex]\Rightarrow g=9\ \text{m/s}^2[/tex]
The acceleration due to gravity on that planet is [tex]9\ \text{m/s}^2[/tex].
A bag weighing 20 N is pushed horizontally a distance of 35 m across a
level floor by a force of 10 N, How much work is done on the bag in
Joules? W=Fd *
Answer:
350J
Explanation:
Given parameters:
Weight of bag = 20N
Distance moved horizontally = 35m
Force applied = 10N
Unknown:
Work done on the bag = ?
Solution:
Work done is the force applied to move a body through given distance.
Work done = Force applied x distance
So;
Work done = 10 x 35 = 350J
A cuboid has sides that are 0.2m, 0.4m and 0.7m. The mass of the cuboid is 0.5kg. Calculate the density.
Answer:
d= 0.93 kg/m3
Explanation:
density= mass/volume
mass is given
volume= 0.4*0.2*0.7
then fill in the figures
Find the mass and show all the work please and show the answer. Thank you.
Answer:
75 kg.
Explanation:
From the question given above, the following data were obtained:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
Kinetic energy (KE), mass (m) and velocity (v) of an object are related according to the following equation:
KE = ½mv²
With the above formula, we can obtain the mass of the object as illustrated below:
Kinetic energy (KE) = 937.5 J
Velocity (v) = 5 m/s
Mass (m) =?
KE = ½mv²
937.5 = ½ × m × 5²
937.5 = ½ × m × 25
937.5 = m × 12.5
Divide both side by 12.5
m = 937.5 / 12.5
m = 75 Kg
Therefore, the mass of the object is 75 Kg.
a sprinter starts from rest and accelerates at a rate of 0.16 ms ^-2 over a distance of 50.0 meters . How fast is the athlete traveling at the end of the 50.0 meters?
Answer:
Final velocity v = 4 m/s
Explanation:
Given:
Initial velocity u = 0 m/s
Acceleration a = 0.16 m/s²
Distance s = 50 m
Find:
Final velocity v
Computation:
Using; v² = u² + 2as
v² = (0)² + 2(0.16)(50)
v² = 16 m/s
v = 4 m/s
Final velocity v = 4 m/s
An elephant kicks a 2.5 kg rock that is initially at rest. The
net force on the rock varies with time as shown below.
What is the rock's change in momentum between 0 ms
and 20 ms?
0.20Answer:
Explanation:
What is a delta?
20 characters...
Answer:
A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or another river that cannot carry away the supplied sediment.
plz follow me
Most electricity comes from the burning of
A. Fossil fuels B. Trash C. Wood D. None of the above
Answer:
(A) Fossil Fuels
Answer:
Fossil Fuels
Explanation:
That’s what CK12 told me
light waves from the sun can travel trough outer space and reach the earth
Answer:
this is true
Explanation:
PLEASE HELP ME I AM BEGGING YOU :)) 15 POINTS
A student investigated the energy being transferred using the
joulemeter (J).
The reading on the joulemeter was always 20 J lower than the
calculated value.
Name the type of error in the investigation
A soccer ball is kicked horizontally and rolled off of a 30 meter high cliff. The soccer ball was kicked with a velocity of 17m/s. How long did it take before the ball hit the ground? How far from the cliff did the ball land? (Make sure to include units.)
VERTICLE
Acceleration =
Distance =
Initial velocity=
Time=
HORIZONTAL
Distance=
Velocity=
Time=
Show your work when solving for time:
Show your work when solving for horizontal distance:
Answer:This will hopefully help. It took me a while so will you mark me brainliest? Thanks!
Explanation:
velocity=Vertical (y) info:
• y = -22.0 m
• viy = 0 m/s
• ay = -9.8 m/s2
distance=
acceleration=
time=
horizontal=Horizontal (x) info:
• x = 35 m
• vix = ?
• ax = 0 m/s2
Initial velocity=16.5 m/s
VOCAB:Horizontal motion is constant
velocity- motion
acceleration-increase in the rate or speed of something.
distance-Distance is a numerical measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). The distance from a point A to a point B is sometimes denoted as. .
time-a point of time as measured in hours and minutes past midnight or noon.
Explanation:
The soccer ball travels a horizontal distance of
33.9 m after being kicked with horizontal velocity of 18.8ms−1. Assuming air resistance is negligible.
Time of flight of the ball
t=Distance Speed=33.918.8s In the vertical direction kinematic equation is
height
h=ut+12gt2 Initial velocity uv=0, acceleration due to gravity g=9.81ms−2. Inserting various values we get h=0×33.918.8+12×9.81×(33.918.8)2⇒h=12×9.81×(33.918.8)2
⇒h=15.9m, rounded to 3 sig. figs
A 30 kg child is in an elevator accelerating down at a rate of -5 m/s2.
a. Calculate the force of gravity on the child.
Answer:
The force is - 150 N
Explanation:
F = 30 • - 5 = - 150
A crate is dragged up a ramp at constant speed. The work done on the system can be accounted for by:
- Eel
-Eg
-Ek
-Eint
-both Eg and Eint
Answer:
The work done on the system can be accounted for by;
Both [tex]E_g[/tex] and [tex]E_{int}[/tex]
Explanation:
The speed of the crate = Constant
Therefore, the acceleration of the crate = 0 m/s²
The net force applied to the crate, [tex]F_{NET}[/tex] = 0
Therefore, the force of with which the crate is pulled = The force resisting the upward motion of the crate
However, we have;
The force resisting the upward motion of the crate = The weight of the crate + The frictional resistance of the ramp due to the surface contact between the ramp and the crate
The work done on the system = The energy to balance the resisting force = The weight of the crate × The height the crate is raised + The heat generated as internal energy to the system
The weight of the crate × The height the crate is raised = Gravitational Potential Energy = [tex]E_g[/tex]
The heat generated as internal energy to the system = [tex]E_{int}[/tex]
Therefore;
The work done on the system = [tex]E_g[/tex] + [tex]E_{int}[/tex].
A molecule contains 16 atoms and undergoes a chemical change. How does the
chemical change affect the total number of atoms of each element? (2 points)
Answer:
They remain the same
Explanation:
As the molecule goes from reactants to products, the number of atoms in the each of the element remains the same.
This is in compliance with law of conservation of matter. The law proposes that "in a chemical reaction, matter is neither created nor destroyed by changed from one form to another".
So, since no matter is destroyed, the number of atoms during a chemical change remains the same before and after a reaction.
This is applicable to all chemical changes.
How Does Exercise Treat Depression?
Answer:
It can help take your mind off of it. and help you get outside and in the world.
Explanation:
Which of the following is a true statement about work?
Group of answer choices
It measure the effort it takes for an object to move
IT measures the change in an object speed
It measures how quickly an object moves
No answer text provided.
Answer:
It measure the effort it takes for an object to move
Explanation:
Work done is the force applied to move a body through a particular distance.
It can also to be said to be a measure of the effort it takes for an object to move.
The unit of work done is in Joules.
To find work done, we use the expression below:
Work done = Force x distance