Power = (work done) / (time to do the work)
Power = (750 joules) / (75 seconds)
Power = 10 joules/second
Power = 10 watts
What is the momentum of a 35–kilogram cart moving at a speed of 1.2 meters/second?
A.
42 kilogram·meters/second
B.
70 kilogram·meters/second
C.
4.2 × 102 kilogram·meters/second
D.
7.0 × 102 kilogram·meters/second
Please help and thank you
Given:-
Mass of the cart (m) = 35 kgSpeed (consider Velocity) = 1.2 m/sTo Find: Momentum of the cart.
We know,
p = mv
where,
p = Momentum,m = Mass &v = Velocity.Thus,
p = (35 kg)(1.2 m/s)
→ p = 42 kg m/s (Ans.)
Conclusion:-
A. ☑️ 42 kilogram - metre per second.
How far does a car travel as it accelerates from rest to 24 m/s in 6 seconds?
Answer:
[tex] \boxed{\sf Distance \ travelled = 72 \ m} [/tex]
Given:
Initial velocity (u) = 0 m/s (Starts from rest)
Final velocity (v) = 24 m/s
Time taken (t) = 6 seconds
To Find:
Distance travelled by car (s)
Explanation:
From equation of motion of object moving with uniform acceleration in straight line we have:
[tex] \boxed{ \bold{s = (\frac{v + u}{2} )t}}[/tex]
By substituting value of v, u & t in the equation we get:
[tex] \sf \implies s = ( \frac{24 + 0}{2} ) \times 6 \\ \\ \sf \implies s = \frac{24}{2} \times 6 \\ \\ \sf \implies s = 12 \times 6 \\ \\ \sf \implies s = 72 \: m[/tex]
[tex] \therefore[/tex]
Distance travelled by car (s) = 72 m
A shuffle board disk is pushed at a rate of 6.0 m/s over a 10.8 m distance by a player. How long did the player push the disk? A. 65 s B. 17 s C. 2 s or D. 4 s
It's obvious that 65 s isn't the answer. I'm still doing this question myself
The chart describes four objects experiencing one or more frictional forces. Which statement explains the type of friction acting on each object?
a. The bike has rolling friction, the sled and the motorcycle have sliding friction, and the elephant has static friction.
b. The bike and sled have sliding friction, and the motorcycle and elephant have static friction.
c. The bike has static friction, the sled and elephant have sliding friction, and the motorcycle has rolling friction.
d. The bike and motorcycle have rolling friction, the sled has static friction, and the elephant has sliding friction.
Answer:
A
Explanation:
I took the test
Rolling friction is demonstrated by a ball or wheel rolling across the ground. Sliding friction is the other form of friction. Because just one side of the body is in contact with the surface, there is a restriction on the body's ability to move. Thus, option A is correct.
What explains the type of friction acting on each object?When something is sitting on a surface, static friction affects it. Because sliding friction is less powerful than static friction, moving a piece of furniture over the floor is simpler once it is moving than before.
Friction that occurs when a moving fluid is positioned between two bodies and an object slides along the surface. Rolling When a thing rolls over another surface, friction is created.
Therefore, The bike has rolling friction, the sled, and the motorcycle have sliding friction, and the elephant has static friction.
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What would 7.68 cal/sec be if it were converted to kcal/sec?
Answer:
0.00768 kcal/sec
Explanation:
If the net force acting on an object doubles, how will the object's acceleration be affected?
Answer:
It goes slower
Explanation:
If the net force is doubled it gains weight
A car travels East at a distance of 540 km in 6.1 hours. What is the cars velocity?
Answer: 55.0066 miles per hour
Explanation: i hope this helped, and pls mark me as brainliest
Which of the following would result if thermal energy is added to an object?
Answer:
is there supposed to be a pic and abcd options?
Contrast scientific laws with traffic laws or other laws devised by people
Answer:
In a nutshell, a scientific law predicts what happens while other laws devised by people usually proposes why certain things happen.
Explanation:
A scientific law is one that predicts the results of certain initial conditions. In order words, it predicts what will happen when certain conditions are fulfilled. A very good example is Newton's 3 laws of motion where like the third law which says to every action, there is an equal and opposite reaction or like in the first law which says a body at rest will remain at rest unless it is acted upon by an external force.
Whereas, other laws devised by people usually provides the most logical explanation as to why things happen the way they do. For example explaining why some children develop certain peculiar health issues when they are newly born.
In a nutshell, a scientific law predicts what happens while other laws devised by people usually proposes why certain things happen.
A senior citizen walks 2km East for 10 minutes, turns and walks 4km south 25 points
for 20 minutes and finally turns and walks 1km East for 5 minutes. What is
their average velocity in km/min?
Answer:
3.29
Explanation:
Convert km/h, meters per second and miles per hour Even though these conversions are covered in the Converter on this website, they are so common that they have their own converter. You can convert between miles per hour, meters per second and kilometers per hour.
The accepted value for the acceleration due to gravity is 9.8 m/s2. What factors do you think are responsible for the difference between your experimental result and the accepted value?
What is electric energy
Answer:
electrons
Explanation:
they go through the wires and power our computer tech
Answer:
Electric energy is a form of kinetic energy.
Fossils are dated using radioactive...
a. hydrogen
b. helium
c. carbon
Answer:
carbon
Explanation:
Answer:
fossils are dated using radioactive C. carbon
Explanation:
hope this helps!
Which part of the roller coaster system determines the amount of kinetic energy in the system
Answer:the roller coaster cars
Explanation:
Which of the following is the most important skill for a human resource
manager?
A. Having strong graphic design skills
B. Having excellent listening skills
C. Having terrific sales skills
D. Having impressive product development skills
Answer:
B
Explanation:
Common Sense, your welcome
The most important skill for a human resource manager is excellent listening skills.
What are the important skills of a Human resource manager?Human resource management is a field that necessitates leadership and management training to develop the abilities that corporate executives seek. Greater chances in the corporate sector are created by HR experts who have a deeper understanding of pertinent subjects and more practical abilities. The key competencies every HR manager has to possess are listed below :
Communication skillsOrganizational skillsDecision-making skillsTraining and developmental skillsBudgeting skillsEmpathetic skillsHence, these are some necessary skills that must be known for Human resource managers.
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You launch a model rocket that has a mass of 2 kg. At a height of 400 m, it is traveling at 150 m/s. What is its kinetic energy at this point? A. 22,500 J O B. 113 J O C. 150 J O D. 45,000 J
Explanation:
KE = ½ mv²
KE = ½ (2 kg) (150 m/s)²
KE = 22,500 J
Answer:
A. 22,500
Explanation:
Which statement describes the system of orbits from smallest to largest?
Universes orbit galaxies that orbit solar systems.
Stars orbit planets that orbit moons.
Solar systems orbit galaxies that orbit the universe.
Moons orbit planets that orbit stars.
Answer:
A
Explanation:
A
Answer:D
Explanation:
What is initial velocity?
Initial velocity is when the motion starts.
Explanation:
Initial velocity is is the velocity at time interval t = 0 is represented by u.
Which combination of characteristics produces the LEAST energetic waves?
.
A. short wavelength, low frequency
B. short wavelength, high frequency
C. long wavelength, low frequency
D. long wavelength, high frequency
Answer:
C.
long wavelength, low frequency
Explanation:
The energy of wave depends on the wave frequency and wave amplitude.
The Wave energy can also be determined by wavelength, wave speed, amplitude, water density e.t.c
According to the question that
Which combination of characteristics produces the LEAST energetic waves ?
The correct option will be
C. long wavelength, low frequency
Option C is therefore the correct answer.
Answer:
Explanation:
c
A car capable of a constant acceleration of 3.72 m/s^2 is stopped at a traffic light. When the light turns green, the car starts from rest with this acceleration. At the very same moment, a truck traveling with constant velocity 13.8 m/s passes the car. As the car’s velocity increases, it will eventually move faster than the truck and later overtake it. How far from the light will the car catch up with the truck?
Explanation:
Let t be the time it takes for the car to catch up with the truck.
Using kinematics equations,
Distance by car = ut + 0.5at² = 0 + 0.5 * 3.72 * t².
Distance by truck = 13.8 * t.
Since these distances have to be equal, we have:
0.5 * 3.72 * t² = 13.8t, 1.86t² = 13.8t, t ≈ 7.42s.
Hence the distance is 13.8 * (7.42) ≈ 102.4m.
Question 4 (2 points)
Your friend just challenged you to a race. You know in order to beat him, you must run 50 meters within 60 seconds in an eastern direction.
What does your average velocity need to be to win the race? (2 points)
5 meters per second, east
Оа
Ob
.83 meters per second, east
Ос
1.2 meters per second, east
Od
3000 meters per second, east
Answer:
0.83m/s,east
Explanation:
velocity=d/t
v=50/60
v=0.83m/s,east
What is Newton’s second law of motion
The rate of change in momentim is proportinal to the law of force. I think if I'm wrong then I apolagize
what is the density of alcohol?
Explanation:
The density of alcohol is 800 Kg/m^3 .
A 3-column table with four rows. The first column has entries Liquid A, Liquid B, Liquid C, Liquid D. The second column titled mass has entries 160 grams, 173 grams, 198 grams, 220 grams. The third column titled volume has entries 94 millimeters, 137 millimeters, 198 millimeters, 235 millimeters. Paula finds four unlabeled containers of clear, odorless liquid in her laboratory storage. One of the containers holds water. She knows that water has a density of 1.0 g/mL. Use the data provided to calculate the density of each liquid. Which liquid is water?
Answer:
The answer is Liquid C
Explanation:
Answer:
Liquid C
Explanation:
Edge2020. I got it right on there. Have a nice day... Please make brainliest if possible.
A fox runs for 12 seconds at a speed of 9.65 m/s. How much distance does it cover?
Answer:
115.8
Explanation:
Answer:
The Distance He Covers Is 115 m/s
Explanation:
A scientist designed a foam container to help keep frozen foods from melting. Which best explains how the foam works? It removes thermal energy from the air inside the container. It removes thermal energy from the frozen foods inside the container. It reduces the amount of thermal energy that is transferred from inside to outside the container. It reduces the amount of thermal energy that is transferred from outside to inside the container.
Answer:
The answer is D
Explanation:
It reduces the amount of thermal energy that is transferred from outside to inside the container.
hope this helps
may i have brainliest pls
The foam reduces the amount of thermal energy that is transferred from outside to inside of the container, which prevents frozen food from melting. Thus, option D is correct.
What is thermal energy?Thermal energy is the energy present in the system that mainly depends on its temperature. Heat is the flow of thermal energy. When temperature increases in the system, the vibration of molecules increases more heat energy is released.
It is also defined as the transfer of heat energy between the systems and also the work done in the transfer of heat. When a substance is changed from one state to another state of matter, heat energy is released.
The material that prevents the heat (thermal energy) passes through them is called a thermal insulator. A foam is considered a good insulator and it is used to prevent frozen food from melting.
Foam is a thermal insulator that prevents heat flow and reduces the amount of thermal energy that is transferred from outside to inside the container.
Hence, the ideal solution is option D.
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According to newton's first law, an object traveling in a circle does not have a force acting on it.
A. True
B. False
Answer:
I say its true
Explanation:
shows an oil tank that has a rectangular base of dimensions 2.4 m by 1.5 m. oil depth of oil 2.4 m 1.5 m
The tank is filled with oil of density 850 kg / m3 to a depth of 1.5 m.what is the force exerted by the oil on the base of the tank.
Answer:
45 000 N
Explanation:
[tex]pressure \: = \frac{force}{area} \\ density \times g \times height = \frac{force}{area} \\ (850)(9.81)(1.5) = \frac{force}{(2.4)(1.5)} \\ force \: = 45000n \: (3sf)[/tex]
The pressure the oil exerts on the base of the tank is required.
The oil exerts a force of 45027.9 N on the base of the tank.
The dimensions of the tank base are 2.4 m by 1.5 m.
h = The height of the tank = 1.5 m
[tex]\rho[/tex] = Density of oil = [tex]850\ \text{kg/m}^3[/tex]
g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
F = Force
A = Area of base
Pressure is given by
[tex]P=\rho gh[/tex]
[tex]P=\dfrac{F}{A}[/tex]
So,
[tex]\rho gh=\dfrac{F}{A}\\\Rightarrow F=\rho ghA\\\Rightarrow F=850\times 9.81\times 1.5\times (2.4\times 1.5)\\\Rightarrow F=45027.9\ \text{N}[/tex]
Hence, the oil exerts a force of 45027.9 N on the base of the tank.
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which one word defines newton’s first law of motion?
Answer: Inertia
Explanation: It's known as the law of inertia, and the entire law has to do with inertia.
Answer: inertia.
Explanation: sometimes referred to as the law of inertia.
The chart shows data for a moving object.
Which conclusion is best supported by the information
in the chart?
Time (s)
Velocity (m/s)
The object has negative displacement.
The object has negative acceleration
The object does not have displacement.
The object is not accelerating.
Answer:
The object has negative acceleration.
Explanation:
2 or B
