Answer:
Angular acceleration [tex]= 0.167[/tex] rad/s^2
Explanation:
Given
Initial Angular velocity (w1) [tex]= 5[/tex] rad/s
Final Angular velocity (w2) [tex]= 0[/tex] rad/s
Time taken to change velocity from w1 to w2 [tex]= 30[/tex] seconds
Angular acceleration is equal to the change in angular velocity to the time taken for making thing change
Hence, Angular acceleration
[tex]\frac{w_2 -w_1}{t} \\\frac{5-0}{30}\\0.167[/tex]rad/s^2
What do the arrows in this photograph represent?
A. Gravity and air resistance
B. An action-reaction force pair
C. A pair of unbalanced forces at work
D. Friction and air resistance
Answer: B An action-reaction force pair
Explanation: Took the exam
The arrows in this photograph represent: An action-reaction force pair. Hence, option (B) is correct.
What is action-reaction force pair?When two bodies interact, they exert an equal and opposite force on one another in accordance with Newton's third law of motion. Action-reaction forces are made up of these forces.
"When one body exerts a force on the other body, the first body experiences a force that is equal in magnitude in the opposite direction of the force which is exerted," according to Newton's third law of motion.
According to the above assertion, there are always two forces operating on the objects involved in an interaction. The forces are of identical magnitude, but the direction of the force acting on the first object is different from the direction acting on the second.
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Investigation to find out relationship between the current in the coil and the force on the iron disc
Answer:
Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.
Explanation:
Excessive washing of the skin disrupts the natural growth of bacteria on the skin's surface, increasing the
chances of:
Answer:
c infections
Explanation:
A desk with a mass of 40kg is being pushed across the classroom and it accelerates at a rate of 5m/s squared . What is the force being applied to the desk?
PLEASE HELPPPPP!!!!! ILL GIVE CROWN
Denver, Colorado is located near the rocky mountains. Which list of controls below would have the strongest influence on the weather in Denver.
A ) Ocean currents, distance from large bodies of water, and altitudes
B ) Altitude, topography, and ocean currents.
C ) Latitude, altitude, and topography
D ) Topography, ocean currents, and latitude.
Answer:To understand the regional and local climates of Colorado, you must begin with a basic knowledge of Colorado's topography. Colorado lies astride the highest mountains of the Continental Divide. Nearly rectangular, its north and south boundaries are the 41° and 37° N. parallels, and the east and went boundaries are the 102° and 109° W. meridians. It is eighth in size among the 50 states, with an area of over 104,000 square miles. Although known for its mountains, nearly 40 percent of its area is taken up by the eastern high plains.
Of particular importance to the climate are Colorado's interior continental location in the middle latitudes, the high elevation of the entire region, and the mountains and ranges extending north and south approximately through the middle of the State. With an average altitude of about 6,800 feet above sea level, Colorado is the highest contiguous State in the Union. Roughly three-quarters of the Nation's land above 10,000 feet altitude lies within its borders. The State has 59 mountains 14,000 feet or higher, and about 830 mountains between 11,000 and 14,000 feet in elevation.
Explanation:
Answer:
D
Explanation:
Hope this helps :)
What can scan tiny details inside the human body by using principles of electromagnetism.
Answer:
magnetic resonance imaging (MRI)
b. What is the man's weight on Mars where the acceleration due to gravity is
3.7 m/s2 ? Show your answer in both Newtons and pounds.
Answer:
How much is the mass of man?
Helppp!!!!! Please!!
A 0.144 kg baseball approaches a batter with a speed of . The batter lines the ball directly back to the pitcher with a speed of . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat 20 m/s 30 m/s
Complete question:
A 0.144 kg baseball approaches a batter with a speed of 20m/s . The batter lines the ball directly back to the pitcher with a speed of 30m/s . Find the impulse exerted on the ball . If the bat and ball were in contact for 0.012 sec , find the average force exerted on the ball by the bat
Answer:
(1) The impulse exerted by the ball is 7.2 kg.m/s
(2) The average force exerted on the ball by the bat is 600 N.
Explanation:
Given;
mass of the baseball, m = 0.144 kg
velocity of the baseball, v₁ = 20 m/s
velocity of the batter, v₂ = -30 m/s (opposite direction to the ball's speed)
The impulse exerted by the ball is calculated as follows;
J = ΔP = mv₁ - mv₂
ΔP = m(v₁ - v₂)
ΔP = 0.144 [20 - (-30)]
ΔP = 0.144 ( 20 + 30 )
ΔP = 0.144 (50)
ΔP = 7.2 kg.m/s
The average force exerted on the ball by the bat is calculated as;
[tex]F = \frac{\Delta P }{t} \\\\where; t \ is \ time \ of \ contact= 0.012 \ s\\\\F = \frac{7.2}{0.012} \\\\F = 600 \ N[/tex]
Provide two reasons why is bronze still used in the manufacture of bells?
(NOVA ASSIGNMENT)
Answer:
Bell makers still use bronze because it has desirable properties, such as hardness and sound quality. The atomic structure of a pure metal is orderly and allows electrons to flow freely through the material. In bronze, the addition of tin to copper restricts the movement of the copper atoms.
Do all the stars move in the sky ? Explain
Hurry up i need help.
The average kinetic energy of the particles of two pieces of iron at the same temperature and mass would be __________.
Question 1 options:
Different
The same
Not equivilent
With in 500 degrees of eachother
Answer:
The answer would be B) The Same
Explanation:
Not gonna lie I checked my class notes but I figured this would help :)
Good luck!!!
Mr. Cudd tries riding a bike to see if he still remembers how. As he gains some speed, he accidentally squeezes the front brakes. What happens immediately after is an example of which one of Newton’s laws?
Answer:
Newton's second Law of motion
What is the net force acting on a jet that has a mass of 130,000kg and it accelerates at a rate of 6m/s as it takes off
Listed in the Item Bank are individual steps that need to be ordered. To find out more information about steps, some have more details
available when you click on them. Drag and drop the steps in the proper order by placing each in its corresponding open rectangle. Be sure
that the earliest step is placed next to the number 1.
Answer:
radio
microwave
Infrared
Visible
Ultraviolet
X-ray
Gamma ray
I hope this helps you a little bit
What materials changed due to the light from the light bulb?(Multiple Choice)
A. Plant
B. Solar Panels
C. Glass
D. Melanin
E. Foil
F. Genetic Material
Which is heavier , a kilogram of lead or a kilogram of a polystyrene beads ?
Answer:
They weight the same, they're both 1 kilogram
The weight of the given objects is the same since they have equal mass.
Weight of object
The weight of an object is the gravitational pull of earth on the object. Weight is vector quantity because it varies from place to place due to difference in acceleration due to gravity.
The weight of 1 kg leadW = mg
W = 1 x 9.8
W = 9.8 N
The weight of 1 kg polystyreneW = mg
W = 1 x 9.8
W = 9.8 N
Thus, the weight of the given objects is the same since they have equal mass.
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Question 1 of 14 Which of the following statements describes a perfectly inelastic collision? O A. An ice hockey player picks up a trophy as he slides past it. O B. A baseball bat hits a baseball into the outfield. O C. A surfer falls off of his surfboard when a wave hits him. D. Two birds collide in midair and fly off in different directions.
Answer: A. An ice hockey player picks up a trophy as he slides past it
Explanation:
A PE X
The statement that best describes a perfectly inelastic collision is
C. A surfer falls off of his surfboard when a wave hits him.
What is collision?A collision is the interaction between two bodies in such a way that the momentum and velocity of one body gets changed due to the presence of other body. There are three types of collision-
1. Elastic collision
2. Inelastic collision
3. Perfectly inelastic collision.
In all types of collision , the momentum of the system before collision and after collision always remains same or we can say that momentum is conserved in collisions
What is elastic collisionAn elastic collision is the one in which kinetic energy is also conserved and coefficient of restitution is one. Both the bodies move separately with different velocities after elastic collision.
What is inelastic collision ?In inelastic collision there is a loss of kinetic energy and coefficient of restitution is less than one.
What is perfectly inelastic collision?In perfectly inelastic collision there is maximum loss of kinetic energy and coefficient of restitution is zero. Both the bodies stick together after collision and move with same velocity
What is coefficient of restitution ?Coefficient of restitution is the ratio of relative velocity of separation after collision to relative velocity of approach before collision.
A surfer falls of his surfboard when a wave hits him is an example of perfectly inelastic collision because in this when water hits the surfers he falls of and sticks to the water , and will also now move with the velocity of water .
So when the surfer falls off his surfboard when a wave hits him is perfectly inelastic collision.
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Which of the following materials does not experience any force when it is brought near a magnet?
1) Iron
2) Silk
3) Steel
4) Cobalt
Please fast, I need help.
Answer:
silk , it is a type of fibre
Please help, is an electric lamp a luminous object?
DESPERATE WILL GIVE BRAINLIST AND THANKS
Which condition would have resulted from the functions of prokaryotes on early Earth?
Earth's oceans grew larger
less oxygen gas became present in the atmosphere
less carbon became present in Earth's soil
more oxygen gas became present in the atmosphere
Answer: D. more oxygen gas became present in the atmosphere
Explanation:
I just took the test and that was the answer
does uranium use turbines
i promise to mark brainliest
Determine the kinetic energy (in joules) of a 1000 kg roller coaster car that is moving with a speed of 25.0 m/s?
Please help this is really confusing
what type of particle carries an electric current through a wire
Which of the following is a compound? A)oxygen B)water C)nitrogen D)hydrogen
Answer:
water
Explanation:
water is a compound
A food has 2 grams of protein, 2 grams of carbs, and 2 grams of fat. How many total calories does this food have? HELP
Answer: 6 grams
Explanation:
Cause 2+2+2=6
Hank's mother got tired of everyone's cell phones ringing during dinner, so she wrapped all
of the cell phones in aluminum foil at dinnertime. Which of the following best explains how
Hank's mother solved her problem?
Cell phone signals are electromagnetic waves, which are absorbed by the aluminum foil
Cell phone signals are electromagnetic waves, which are reflected by the aluminum foil
Cell phone signals are mechanical waves, which are absorbed by the aluminum foil
O Cell phone signals are mechanical waves, which are reflected by the aluminum foil
Answer:
Cell phone signals are electromagnetic waves, which are reflected by the aluminum foil
Answer:
I think the best answer would be the first but am I the only one wondering why the mom didn't just turn off the phone but instead she had to be extra and wrap them up like a gift to give them after dinner.
physics help me pleaseee
Answer:
letter e.
Explanation:
because i know its not too deep
Pretend you are designing your own home. You often get cold in the winter and want to make this house as energy efficient as possible to keep you warm. Use your knowledge about energy transfer and describe at least 3 things you would include in the design of your home. Be sure to explain why you would include these things.
Answer:
I would include extra insulation, a heating system, and some snug-fitting sweaters.
Explanation:
that way i won't get cold
CAN A BRAINLEST HELP PLEASE!!!
The diagram below represents a rope along which
two wave pulses of equal amplitude, A, approach
point P