Answer:
circular
Explanation:
A horse and her rider have a combined mass of 120 kg and is traveling 45 m/s down a dirt road. She increases her speed to 85 m/s in 4 seconds., what force did it require for her to speed up?
Answer:
1200N
Explanation:
Given parameters:
Mass of the horse and rider = 120kg
Initial velocity = 45m/s
Final velocity = 85m/s
Time taken = 4s
Unknown:
Force required to speed up = ?
Solution:
According to Newton's second law of motion;
Force = mass x acceleration
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Now;
Force = mass x [tex]\frac{v - u}{t}[/tex]
Insert the parameters and solve;
Force = 120 x [tex]\frac{85 - 45}{4}[/tex] = 1200N
Arif decided to make a model of the global wind patterns on Earth. He draws arrows of the global winds that move in a circular pattern from the equator to the poles and back again. Explain what causes global winds to form. Why do they move in convection currents around Earth? Please help
Answer:
The Earth's rotation which produces Coriolis force is the responsing factor for the formation and movement of different global winds.
The cause of the global winds is due to the rotation of the earth that produces the Coriolis force factor for the formation and movement of global winds.
What are global wind patterns?The global wind pattern is formed by the movement of the earth and they are polar easterlies, prevailing westerlies and the trade winds.
Each of them occurs at about 30 degrees of latitude. Hence they form wind belts. The Coriolis effect that is created due to the rotation of the earth is a fact that leads to the movement of global winds.
Find out more information about the earth.
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PLEASE HELP
A particle travels in a circle of radius 76 cm and completes one revolution in 4.5 s. What is the centripetal acceleration of the particle?
A. 2.8 m/s2
B. 1.5 m/s2
C. 0.97 m/s2
D. 3.3 m/s2
Answer:
option no B is the snswer
Calculate the amount of work must a 60 kg runner do to
accelerate from rest to a velocity of 2 m/sec?
Answer:120j
Explanation:
The amount of work must a 60 kg runner do to accelerate from rest to a velocity of 2 m/sec is 120 joules.
To find the work done, the given values are,
Mass = 60 kg
Velocity = 2 m/sec.
What is Kinetic energy?The amount of work can be expressed by the Kinetic energy of the runner. Energy can be defined as the capacity of an object or physical body to perform work. Thus, energy is typically measured in Joules (J).
Kinetic energy can be regarded as form of energy posses by an object when it's in motion.
Total energy = kinetic energy + potential energy
Thus, Kinetic Energy, KE = (1/2) (m) (v²)
KE =1/2 (60 kg) (2² m²/s²)
KE = 120 Joules.
That's the amount of energy that has to come from somewhere, in order to boost him to that speed.
The amount of work must a 60 kg runner do to accelerate from rest to a velocity of 2 m/sec is 120 joules.
Learn more about Kinetic Energy,
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#SPJ2
What type of force is magnetic force? *
Strong Nuclear force
Non-contact force
Contact force. Weak Nuclear force
Answer:
non contant force
Explanation:
bcoz they push or pull on object without touching them
Answer:
energy
Explanation:
Why doesn't the skateboarder roll as high each time she goes up the ramp
Answer:
The skater has mechanical/gravitational potential energy at the two meter mark. The skater gets to two meters high on the other end of the ramp. In terms of the conservation of energy, the skater will never go higher than two meter on the other end of the the ramp because energy can be neither created nor destroyed.
Explanation:
I hoping it is right!!!∪∧∪ ∪ω∪
Answer:
the reason it wont go higher is because some of the energy converts into thermal energy
Explanation:
I'm the energy master
type of energy found in bread
Answer:
Bread contains energy in form of
Carbohydrates
Explanation:
Answer:
CHEMICAL ENERGY
A gun fires a bullet horizontally with a velocity of 90 m/s from a tower. Neglecting air resistance, how far will the bullet travel horizontally in 4 seconds?
Answer:
The distance covered along the horizontal axis is [tex]s = 360 \ m[/tex]
The distance covered along the vertical axis is [tex]h = 78.4 \ m[/tex]
Explanation:
From the question we are told that
The horizontal velocity is [tex]u_x = 90 \ m/s[/tex]
The time considered is [tex]t = 4 \ s[/tex]
Generally the distance which the bullet will cover in the horizontal direction for the given time is mathematically represented as
[tex]s = u_xt + \frac{1}{2}* at^2[/tex]
Here a is the acceleration along the horizontal direction and the value is [tex]a = 0 \ m/s^2[/tex]
So
[tex]s = 90 * 4 + \frac{1}{2}* * 0 * 4^2[/tex]
=> [tex]s = 360 \ m[/tex]
Generally the distance which the bullet will cover in the vertical direction for the given time is mathematically represented as
[tex]h= u_y t + \frac{1}{2}* gt^2[/tex]
Here [tex]u_y[/tex] is the initial velocity of the bullet along the vertical axis and the value is [tex]u_y = 0 \ m/s[/tex]
[tex]h = 0 * 4 + \frac{1}{2}* 9.8 *4^2[/tex]
=> [tex]h = 78.4 \ m[/tex]
Please select the word from the list that best fits the definition
Wave that has vibration in a direction that is perpendicular to the motion creating it
transverse wave
longitudinal wave
mechanical wave
Answer:
Transverse wave
Explanation:
An object has an x-momentum of 8.5 kilogram-meters/second and a -momentum of 9.8 kilogram meters/second. What Is resultänt
momentum of the object?
OA 15.5 kilogram-meters/second
OB. 14.8 kilogram-meters/second
0c 12.97 kilogram-meters/second
OD. 16.8 kilogram-meters/second
Answer:
The resultant momentum is 12.97 kg.m/s. Choice: c
Explanation:
Momentum
The momentum is a vector that measures the quantity of motion that an object has. It's also known by the term "mass in motion".
As a vector, it can be expressed by its rectangular components:
[tex]\vec p = p_x\mathbf{i}+p_y\mathbf{j}[/tex]
The magnitude of the momentum is:
[tex]\mid \mid \vec p \mid \mid =\sqrt{p_x^2+p_y^2}[/tex]
The object described has an x-component of:
px=8.5 Kg.m/s
And a y-component of:
py=9.8 Kg.m/s
Thus, the magnitude of the momentum is:
[tex]\mid \mid \vec p \mid \mid =\sqrt{8.5^2+9.8^2}[/tex]
[tex]\mid \mid \vec p \mid \mid =\sqrt{72.25+96.04}[/tex]
[tex]\mid \mid \vec p \mid \mid =\sqrt{168.29}[/tex]
[tex]\mid \mid \vec p \mid \mid =12.97[/tex]
The resultant momentum is 12.97 kg.m/s. Choice: c
A person pours some chlorine bleach into a clothes washer to remove stains from the clothing. What is one chemical property or the bleach?
A. It’s density
B. It’s mass
C. It’s color
D. It’s pH
One chemical property of the bleach is its pH.
What is pH?This is referred to as the power of hydrogen and is a measure of how acidic/basic a substance is.
pH is an example of chemical property because it's associated with a change in its chemical composition. This thereby makes option D the most appropriate choice.
Read more about pH here https://brainly.com/question/4137247
Answer: It's pH
Explanation: I took the test
A 20 kg crate initially at rest on a horizontal floor requires a 80 N horizontal force to set it in motion. Find the coefficient of static friction between the crate and the floor.
Answer:
The coefficient of static friction between the crate and the floor is 0.41
Explanation:
Friction Force
When an object is moving and encounters friction in the air or rough surfaces, it loses acceleration and velocity because the friction force opposes motion.
The friction force when an object is moving on a horizontal surface is calculated by:
[tex]Fr=\mu N[/tex] [1]
Where [tex]\mu[/tex] is the coefficient of static or kinetics friction and N is the normal force.
If no forces other then the weight and the normal are acting upon the y-direction, then the weight and the normal are equal in magnitude:
N = W = m.g
The crate of m=20 Kg has a weight of:
W = 20*9.8
W = 196 N
The normal force is also N=196 N
We can find the coefficient of static friction by solving [1] for [tex]\mu[/tex]:
[tex]\displaystyle \mu=\frac{Fr}{N}[/tex]
The friction force is equal to the minimum force required to start moving the object on the floor, thus Fr=80 N and:
[tex]\displaystyle \mu=\frac{80}{196}[/tex]
[tex]\mu=0.41[/tex]
The coefficient of static friction between the crate and the floor is 0.41
Which type of friction opposes motion?
Answer:
Friction does not oppose motion, it oppose relative motion.
Explanation:
static friction opposes relative motion
Answer:
there are three types or friction
1) Static friction
2) Rolling Friction
3) Sliding friction
Static friction comes to end when the object starts moving(or starts motion ) so Sliding Friction and Rolling Friction opposes motion l.
Deaths due to lifestyle diseases have declined since the early 1900s.
T
F
Answer:
FalseExplanation:
Hope this helps! Please consider marking brainliest! Always remember, your smart and you got this! -Alycia :)
How to find acceleration?
Answer:
a=(v-u)/t is how you find acceleration.
When you walk across the ground and push on it with your feet...
Group of answer choices
The ground pushes back more strongly than your feet
The ground pushes back on your feet with equal force
There is no effect on the ground
The ground pushes back less strongly than your feet
Answer:
The ground pushes back on your feet with equal force
Explanation:
When you walk across the ground and push on it with your feet, the ground pushes back on your feet with an equal and opposite force.
This interpretation and knowledge is gotten from Newton's third law of motion.
It states that "action and reaction force are equal and opposite in nature".
The force applied to a body responds with an opposite force in the other direction. Therefore, the reaction force is of equal magnitude but directed in another direction.Answer:
the answer is the second one: the ground pushes back on your feet with equal force
Explanation:
what is plasma made of and what are its properties.
why do we need to study plasma in physics
Plasma is made up of about 90% water. It also has salts and enzymes.
Plasma has:
no fixed shape no fixed volume are less dense than liquids and solidsAnswer:
Plasma is made up of about 90% water . These are the properties of plasma. Plasmas have no fixed shape or volume, and are less dense than solids or liquids. Studying plasmas is critical to advance technology development for practical purposes as developing functional fusion reactors and to understand the processes in stars, planets and inter-stellar spaceI hope l helped you ❤❤(please help!) A 60Kg crate is pulled with a force of 400N at an angle of 30 degrees above the horizontal. A 150N force resists sliding of the crate. (Be sure to do a sketch (FBD)
A) Calculate the weight of the crate:
B) Calculate the components of the 400N force: Fx = ___________. Fy = ____________
C) Calculate the normal force on the crate:
D) Calculate the acceleration of the crate:
E) Calculate the speed of the crate if it started from rest after t = 4 s
Guys i need help please
Answer:
I'm pretty sure the answer is around 9.2 seconds
Explanation:
List 5 occasions in real life when you want friction (motion to stop)
Answer:
*want my husband's mouth to stop moving
*when im driving my car and the light turns red
*i want the person pushing the buggy behind me to stop when I stop
*when I'm on the 16th floor at the Horseshoe Casino Hotel and the elevator keeps passing my floor... would love for it to stop and pick me up
*when Publisher's Clearing House is delivering my big fat check, I definitely want them to stop and hand it over:)
Which of the following is not true about elements.
Answer:
C
Explanation:
elements are classified as covalent, ionic, metallic
Mining would be classified as a _____ human activity for the environment. Negative or positive
Answer: negative
Explanation:
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.
Answer:
The average speed of the blood in the capillaries is 0.047 cm/s.
Explanation:
Given;
radius of the aorta, r₁ = 1 cm
speed of blood, v₁ = 30 cm/s
Area of the aorta, A₁ = πr₁² = π(1)² = 3.142 cm²
Area of the capillaries, A₂ = 2000 cm²
let the average speed of the blood in the capillaries = v₂
Apply continuity equation to determine the average speed of the blood in the capillaries.
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.
magnification of concave lens is:
1. always less than 1
2. always greater than 1
3. always equal to 1
4. sometimes less and sometimes greater than 1
The movement of crustal plates is best described as a:
1)Trend toward increased crust movement overtime
2)Series of events that happens quickly
3)continuing long-term process
4)process that has a predictable pattern
Answer:
it is number 3, continuing long-term process
Select the correct answer. In a video game, a ball moving at 0.6 meter/second collides with a wall. After the collision, the velocity of the ball changed to -0.4 meter/second. The collision takes 0.2 seconds to occur. What's the acceleration of the ball during the collision? Use a equals fraction numerator v minus u over denominator t end fraction. Group of answer choices 5.0 m/s2 -5.0 m/s2 1.0 m/s2 0.24 m/s2 -1.0 m/s2
Answer:
a = - 5 m/s²
Explanation:
The acceleration of the ball can be found by using the general formula of acceleration as follows:
[tex]a = \frac{\Delta V}{\Delta t}[/tex]
where,
a = acceleration of ball = ?
ΔV = change in velocity = Final Velocity - Initial Velocity
ΔV = - 0.4 m/s - 0.6 m/s = -1 m/s
Δt = time of contact with the wall = 0.2 s
Therefore, using the values in equation, we get:
[tex]a = \frac{-1\ m/s}{0.2\ s}\\\\a = -5\ m/s^2[/tex]
Therefore, the correct option is:
a = - 5 m/s²
Which of these is an example of chemical energy being converted to mechanical energy?
eating breakfast then walking to the bus.
turning on the radio
piling wood and then making a fire
Answer:
Eating breakfast then walking to the bus
if you punch a wall with the force of 30N, what force will you feel on your fist
30N
Natural reaction, the same force comes back to you
Answer:
it depends on if collision elastic or in elastic
if collision is elastic the the wall will also exert 30 N
help guysssssssssssssssssssssssssssss
Answer: D) Earthquake
I hope this helps, and Happy Holidays! :)
Answer: Earthquakes
Explanation: Earthquakes impact rupture breaks in the ground, landslides, avalanches, fires, tsunamis, property damage, and loss of life.
Can someone help me out?
Answer:
B). Rarefaction :) _____
the arrow points to the rarefactions
