Answer:
Push -repulsion
Pull - attraction
Explanation:
When two magnets are brought together, a push happens when a force of repulsion is experienced where the magnets move away from each other. This means their polarity is the same and this will cause the magnet to push away from each other.
When two magnets are brought together , a pull happens when a force of attraction is experienced where the magnets move close to each other. This means their polarity is different and thus causes the magnets to pull closer to each other.
Can mechanical waves travel in a vacuum?
O yes
O no
No mechanical waves cannot travel in a vacuum
pleease answer this right ill give you 50 points
Answer:c a b I think I might be wrong but I’m pretty sure that’s it
Explanation:
Kepler’s third law of planetary motion states that the square of a planet's orbital period is proportional to the cube of the average distance between the planet and the sun.
Please select the best answer from the choices provided
T
F
Answer:
Based on the options given, the most likely answer to this query is The square of the orbital periods of the planets are directly proportional to the cubes of their average distances from the Sun.
Explanation:
Thank you for your question. Please don't hesitate to ask in Brainly your queries.
if the car ha a mass of 1000 kilograms, what is its momentum (v=35m/s)
Answer:
The momentum of the car is 35,000 kg.m/s
Explanation:
Momentum
Momentum is often defined as mass in motion.
Since all objects have mass, if it's moving, then it has momentum. It can be calculated as the product of the mass by the velocity of the object:
[tex]\vec p = m\vec v[/tex]
If only magnitudes are considered:
p = mv
The car has a mass of m=1,000 kg and travels at v=35 m/s. Calculating its momentum:
p = 1,000 kg * 35 m/s
p = 35,000 kg.m/s
The momentum of the car is 35,000 kg.m/s
The momentum of the car is 35000 kgm/s.
MomentumLinear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.
If m is the mass and v is the velocity of an object, then the object's momentum p is given below.
[tex]p = mv[/tex]
Given that the mass of the car is m=1,000 kg and travels at v=35 m/s. The momentum is given below.
[tex]p = 1000 \times 35[/tex]
[tex]p = 35000 \;\rm kg m/s[/tex]
Hence we can conclude that the momentum of the car is 35000 kgm/s.
To know more about the momentum, follow the link given below.
https://brainly.com/question/4956182.
In every population there is variation. It is important that this variation.
Answer:
Genetic variation is an important force in evolution as it allows natural selection to increase or decrease frequency of alleles already in the population.
rate the ans plz.
Help please this is worth 30% of my grade in total
Answer:
D. Both are held together by gravitational forces
Explanation:
The common features in galaxies are;
Gravity holds the stars togetherThe dense region in a galaxy is the centerThey all have a faint outer region and mysterious dark matter haloThey all have stars, planets, asteroids, galactic cloudAccording to O*NET, what is the most common level of education held by Emergency Medical Technicians?
post-secondary certificate
associate degree
some college, no degree
bachelor’s degree
The answer is post-secondary certificate, I found that out because I got the answer wrong on edg 2020.
Answer:
post secondary certificate.
Explanation:
Answer:
post secondary certificate sorry that you got it wrong
Explanation:
A student is standing in an elevator that travels from the first floor to the thenth floor of a building.The student exerts the greatest force on the floor of the elevator when the elevator is
Answer:
accelerating upward as it leaves the first floor.
Explanation:
When a person moves up in the elevator, the person's apparent weight is less then the actual weight. The person feels less weight than his or her actual weight. But just before the elevator starts moving the apparent weight of the person is equal to the normal or actual weight of the person before the movement. And after moving up in the elevator, the apparent weight is less than the actual weight, as one is moving against the force of gravity.
So in the context, the student exerts greatest force on the 1st floor as the elevator is accelerating upward when it leaves the first floor.
The velocity of a vehicle is typically expressed relative to which of the following?
The question is incomplete, however, The velocity of a vehicle is typically expressed relative to ground.
velocity is the measurement of a body's "pace of change of displacement in relation to time" when the body is traveling along a straight route.It is common knowledge that the word "linear" refers to something that is straight; therefore, when the body moves in a straight path, it is said to be linear velocity .Alternatively, velocity is the distance traveled by a body traveling in a specified direction during a predetermined period of time. Thus, the fundamental idea of linear velocity is provided by the union of these two quantities.Because it always has a direction velocity is a vector.To know more about velocity visit : https://brainly.com/question/19979064
#SPJ1
Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car's acceleration?
a) 35 km/h/s
b) 40 km/h/s
c) 10 km/h/s
d) 5 km/h/s
Answer:
c
Explanation:
the first 35 to 40 acceleration will be 5 same as 40 to 45 ,
5+5=10
Car is moving in a straight line and steadily increases its speed. Then its acceleration in the first is 35 to 40 acceleration will be 5 same as 40 to 45 ,then 5+5=10.
What is speed ?"Speed is the distance traveled per unit of time. It is how fast an object is moving. Speed is the scalar quantity that is the magnitude of the velocity vector. It doesn't have a direction."
What is acceleration ?"Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object. "
Know more about acceleration here
https://brainly.com/question/12550364
#SPJ2
You want to go swimming, but there is no lifeguard at the beach right now. You are not a good swimmer. The safest thing to do in this situation is to
swim only where you are able to stand
swim only with a lifeguard present
swim with a flotation device
swim with a friend in deep water
Answer:
swim with flotation device
Explanation:
Difference between Pascal’s law and law of flotation
How much energy is needed to melt 5 g of ice? The specific latent heat of melting for water is 334000 J/kg.
Answer:
The needed energy to melt of ice is 1670 J.
Explanation:
Given that,
Mass of ice = 5 g
Specific latent heat = 334000 J/kg
We need to calculate the energy
Using formula of energy
[tex]Q=mL[/tex]
Where, m = mass
L = latent heat
Put the value into the formula
[tex]Q=5\times10^{-3}\times334000[/tex]
[tex]Q=1670\ J[/tex]
Hence, The needed energy to melt of ice is 1670 J.
It will be easier to lift a load in wheel Barrow if the load is moved towards the wheel. Give reason
Answer:
yes, majority of the weight will be supported by the front wheel and not by you.
Explanation:
What stresses can you experience in nursing
Answer:
Yes, Nurses are experience a stress in a higher rate at workplace.
Explanation:
We know that,
Stress in nursing :
According to association of american holistic nurses,
Nurses are experience a stress in a higher rate at workplace.
These stress are,
Physical demand
Management problems
lack of staff
Increment of number of patients
Face with death,
Fighting to infection as highly stressful factors in the workplace
Hence, Yes, Nurses are experience a stress in a higher rate at workplace.
When does a car show positive acceleration?
Answer:
When it is accelerating or gaining velocity.
Explanation:
A car show positive acceleration when it is accelerating or gaining velocity. It would show negative acceleration if it was de-accelerating, slowing down or coming to a stop.
Answer:
When the velocity is increasing in the positive direction
Explanation:
What do these two changes have in common? making paper from wood
photosynthesis
Select all that apply.
Both are chemical changes.
Both are changes of state.
Both conserve mass.
Both are caused by heating.
Answer:
Both are chemical change as the new product is formed with new characteristics and can't be brought back to previous form.
Objects tend to continue in their current state, if it is rest or uniform motion. What is the term for this tendency
Answer:
Inertia
Explanation:
The term for the tendency is inertia.
The inertia of a body is the tendency of the body to remain unmoved when at rest and the tendency to keep moving when in motion. In other words, it is the tendency of a body to remain in a state of rest or motion.
A static body will remain in a state of perpetual rest if no force acts on it and a moving body will keep moving in the same direction if no force acts on it. The force that needs to be overcome in order to change the state of the object is otherwise known as inertia force.
pleas help me phyic science
Answer:
D
Explanation:
The amount of energy present in the matter
How does surface area affect the amount of air resistance an object experiences?
А
ray of light is incident on the surface of water at 45, and it gets refracted
inside water at an angle of 32. The absolute refractive index of water is
Explanation:
Using Snell's Law, we have 1sin45° = nsin32°.
=> n = sin45° / sin32° = 1.33.
The refractive index of water is 1.33.
An astronaut decides to perform an experiment to monitor how much weight he loses during his stay on the International Space Station. He weighs himself prior to takeoff, daily while on the space station, and again after returning to Earth.
Explain the following for 2 points each:
Identify what data from the weights he recorded should be considered in his experiment
For any weigh-ins that should not be used in his experiment, explain your reasoning
Explain the relationship between mass, weight, and gravity
Answer:
The first one is: His weight on the Earth before take-off and the weight after take-off back on Earth once he gets back should be recorded as his Independent variable and his dependent variable.
The second one is: If he gained the weight back that he had lost while on the trip then you should disregard them unless that was the weight he was when he weighed himself after he got back.
The Third one is: The mass of an object is the amount of matter it contains, regardless of its volume or any forces acting on it. … Gravity is a force that attracts objects toward the Earth. The weight of the object is defined as the force caused by gravity on a mass.
Explanation:
I took the quiz earlier. Hope this Helps you.
A jet takes off from Florida and flies 100 miles north and then 400 miles west. Determine the total distance travelled by the jet.
Answer:
90m
Explanation:
Distance is not a vector but a scalar quantity. depicted by a quantity only.
hence:
Distance is equal to 30+40+20 = 90 m
Which samples will heat up faster? circle one 100 g (least massive) 200 g (most massive) No Difference Explain your reasoning:
if Circle one 100 g (least massive) and 200 g (most massive) have the same material then the least massive i.e 100g heat faster.
what is specific heat?The amount of heat required to raise the temperature of an object is proportional to its mass. Specifically, the heat required is given by,
the formula
Q = m × c × ΔT
Where Q= is the amount of heat required
m= is the mass of the object
c= is the specific heat capacity of the material, and ΔT is the change in temperature.
If the two samples are made of the same material and have the same initial temperature, their specific heat capacities and the change in temperature will be the same.
Then, the amount of heat required to raise the temperature of the 100 g sample will be half that of the 200 g sample. This means that the 100 g sample will heat up more than the 200 g sample, as it requires less heat to raise its temperature.
Therefore, The sample with 100 g (least massive) will heat up faster than the sample with 200 g (most massive) if both samples are made of the same material and have the same initial temperature.
To learn more about specific heat click:
https://brainly.com/question/11297584
#SPJ3
What are not examples of velocity
Answer:
Explanation:
Acceleration roughly means “change in velocity.” If this change in velocity is consistently in one direction, the body will reach a point at which its velocity is zero.
Another consideration is when you drop a basketball onto the pavement. The ball falls, hits the ground, and comes back up. Because its direction of motion changed, you know that its velocity MUST have been 0 m/s at some point during the bounce.
This doesn't mean there was no acceleration at this point.
How is temperature related to the motions of molecules?
Answer:
As the temperature increases, the kinetic energy of the molecules of the liquid increases.
Explanation:
CHOOSE ONE ANSWER OUT OF a, b, c, d (Multiple Choice): Which of the following statements about fluids is true? a. Fluids rarely take the shape of their container. b. Fluids include liquids and gases. c. Fluids flow from low pressure to high pressure. d. Fluid exert the most pressure in a downward direction.
A bicyclist is traveling at +25 m/s when he begins to decelerate at -4 m/s2. How fast is he traveling after 5 seconds?
Answer:
The bicyclist goes at 5 m/s
Explanation:
Motion With Constant Acceleration
It's a type of motion in which the velocity of an object changes uniformly in time.
The equation that rules the change of velocities is:
[tex]v_f=v_o+at[/tex]
Where:
a = acceleration
vo = initial speed
vf = final speed
t = time
It's given a bicyclist is traveling at v0=+25 m/s and decelerates at [tex]a=-4\ m/s^2[/tex]. We are required to calculate the speed after t=5 seconds.
Applying the formula:
[tex]v_f=25+(-4)*5[/tex]
[tex]v_f=25-20=5[/tex]
[tex]v_f=5\ m/s[/tex]
The bicyclist goes at 5 m/s
A fat person weighing 80 Kg falls on a concrete floor from 2m. If whole of the mechanical energy is converted into heat energy, then heat produced in SI units will be nearly
Answer:
The heat produced is 1568 J
Explanation:
The given parameters are;
The mass of the person, m = 80 kg
The height from which the person falls, h = 2 m
Mechanical Energy, ME = Potential Energy, PE + Kinetic Energy, KE
At the height, from where the person falls, the initial velocity of the person = 0 m/s
Therefore;
The initial kinetic energy, K.E. = 1/2·m·v² = 1/2 × 80 kg × (0 m/s)² = 0 J
From which we have;
The Mechanical Energy, M.E. = The initial Potential Energy, P.E. + 0 J
∴ The Mechanical Energy, M.E. = The initial Potential Energy, P.E.
The initial Potential Energy, P.E. = m·g·h
Where;
m = The mass of the person
g = The acceleration due to gravity ≈ 9.8 m/s²
∴ The initial Potential Energy, P.E. = 80 kg × 9.8 m/s² × 2 m = 1568 J
The Mechanical Energy, M.E. = The initial Potential Energy, P.E. = 1568 J
The whole mechanical energy is converted into heat energy, therefore, we have;
The Mechanical Energy, M.E. = The heat energy = 1568 J
The heat produced = The heat energy = 1568 J.
The passing of a wave through a material
A. Absorption
B.transmission
C.reflection
Answer:
B: transmission
Explanation: Transmission of waves occurs when waves pass through a given point or medium. Sound waves are transmitted through solids, liquids, and gases therefore the answer is the transmission