Explanation:
Force (F) = 500 N
Distance (d) = 16 m
work done (w) =?
We know that
w = F * d
= 500 * 16
= 8000 Joule.
The bulldozer performs 8000 Joule.
Hope it will help you :)❤
A lift motor transfers 24 000J of energy in 1 minute travelling between floors. Calculate the power of the motor.
Answer:
400W
Solution :
power (w) = work done (J) ÷ time(s)
x= 24000J ÷ 60s = 400W
Which two statements describe how ultrasound technology produces an image of a baby before it is born?
A. An image is created based on the frequency of reflected X-rays.
B. Body tissues absorb high-frequency sound waves, producing an image.
C. An image is created based on the amount of time it takes for a sound wave to return.
D. Tissues in the baby's body reflect high-frequency sound waves.
Answer:
C,D
Explanation:
an image is created based on the amont of time it takes for a sound wave to return
Tissues in the babys body reflect high-frequency sound waves
In ultrasound scanning, an image of internal organs is created based on the amount of time it takes for a sound wave to return.Thus, option C is correct.
What is ultrasound scanning?High-frequency sound waves are used in ultrasound imaging, also known as sonography, to view within the body. Real-time ultrasound imaging allows for the display of blood flowing via blood vessels as well as movement of the body's internal organs.
Contrary to X-ray imaging, ultrasonic imaging does not expose patients to ionizing radiation.A transducer (probe) is positioned either on the skin or inside a bodily orifice during an ultrasonic examination.
To allow the ultrasonic waves from the transducer to pass through the gel and into the body, a small coating of gel is placed to the skin.
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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
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:
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:
According 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:
Can mechanical waves travel in a vacuum?
O yes
O no
No mechanical waves cannot travel in a vacuum
Differences between fundamental and derived quantities
Answer: Below...
Explanation:
Fundamental Quantities: based and defined by the process of measurement... some examples are length, mass, time
Derived Quantities: can be defined through the fundamental quantities... some examples are velocity, volume, pressure
EX: volume (derived q.) can be measured by mass (fundem. q.)
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.
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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
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.
Mark, a 73 kg physics student, rides a rollercoaster. At the bottom of a steep dive he experienced a net force of 1600 N. What was his acceleration at that point? Show your work.
Answer:
21.9m/s²
Explanation:
Given parameters:
Mass of the physics student = 73kg
Net force = 1600N
Unknown:
The acceleration at this point = ?
Solution:
To solve this problem, we apply a knowledge of Newton's second law of motion which is mathematically expressed as;
F = m a
F is the friend
m is the mass
a is the acceleration
1600 = 73 x a
a = 21.9m/s²
4 A magnet can exert a force of attraction or a force of repulsion on another magnet.
Which of these forces is a push and which is a pull?
please explain too thanks!
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.
An object is dropped from rest from a 70.6 m tower. Air resistance is negligible. After 0.32 seconds, what is magnitude and direction of its acceleration?
Answer:
1,378.9ms²
Explanation:
Given the following
Distance S = 70.6m
Time t = 0.32secs
Initial velocity = 0m/s
Required
Acceleration
Using the equation of motion
S = ut+1/2at²
Substitute
70.6 = 0+1/2a(0.32)²
70.6 = 0.0512a
a = 70.6/0.0512
a = 1,378.9
Hence the acceleration is 1,378.9ms²
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:
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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
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.
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:
For Valentine’s Day, Sally received a helium-filled balloon at a party. On returning home she accidentally left the balloon in the car. Later she went to get the balloon and found it was partially deflated. After being in the house for an hour she noticed it was fully inflated again. Explain why this happened.
Answer:
If the temperature of the air in the balloon is less than the temperature of the air surrounding the balloon then the balloon will appear slightly deflated because of the difference in temperature.
As the temperature of the air in the balloon reaches the surrounding air temperature, then the balloon will appear to be fully inflated because the temperature of the air in the balloon is the same as the surrounding air temperature.
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.
Robins are birds that sing to attract mates two male robins robin A and Robin B are both singing to attract females robin A had more songs which the females find more attractive which option is likely to happen
Answer:
The female birds find more attractive which option is likely to happen is discussed below in detail.
Explanation:
All About Robins and How to Attract Them - Natural Birds Unlimited | Wild Birds Unlimited. These birds are interested to inaugurate grasslands and gardens with seasoned underbrush and trees. While they consume a variety of pests and grains or seeds, it has been remarked that they can consume up to 5 meters of earthworms in a day.
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. "
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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:
an aircraft is flying at height of 3400m above the ground.if the angle subtended at a ground observation point by the aircraft positions 10s apart is 30degree. what is the speed of the aircraft?
Answer: 588.9 m/s
Explanation:
Given that :
θ = 30°
Height, h = 3400m
Time, t = 10 seconds
From trigonometry ;
Tanθ = opposite / hypotenus
Tan 30 = 3400 / x
x tan 30 = 3400
0.5773502x = 3400
x = 3400 / 0.5773502
x = 5888.9727
Recall ;
Speed = Distance / time
Speed = 5888.9727 / 10
Speed = 588.897 m/s
Speed = 588.9 m/s
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.
You drive 10 meters backwards and then 20 more meters backwards in 30 seconds. What is your average velocity?
Answer:
Average velocity= 1 m/s
Explanation:
Step one:
given data
total distance covered = 10 meters backwards+ 20 more meters backwards
toatal distance= 10+20= 30 meters
time taken = 20 seconds
Required
The average velocity
Step two:
the expression for the average velocity is
Average velocity= total distance/total time taken
Average velocity= 30/30
Average velocity= 1 m/s
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.
Explain why wine glasses with long stems have broad base
Answer:
The best glasses have a wider bowl than rim to allow for proper swirling. The swirl releases volatile aroma compounds and creates a vortex in the center of the glass towards which these compounds are drawn
Explanation:\\\