1. Which statement best describes the motion of the scooter? *
A. The scooter is moving at a constant velocity.
B. The scooter is traveling up hill.
C. The scooter is speeding up at a constant rate.
D. The scooter’s motion cannot be described from a position graph.
2. What is the velocity of the scooter? *
A. 50 m/s
B. 10 m/s
C. 1.0 m/s
D. 0.0 m/s
E. Cannot answer velocity questions using a position graph
Answer:
HI
Explanation:
its E
A rat runs 2m right, turns around and runs 3m left. Then goes 2m right. What is its displacement?
A. 1m right
B. 1m left
C. 7m
D. 7m left
Answer:
Explanation:
I think this answer would be 1m to the left.
it is very important to use _______ in your calculations
a: si units of measurement
b: alternative units of measurement
c : units of length and width
d: derived units
Answer:
snoemw
Explanation:
A pulse with a height of 20 cm and a length of 30 cm travels with a speed of 400 cm/s through a spring that has been stretched so it is 800 cm long. If we want to send another pulse through the spring that will have a different speed, which of the bolded words should we change? List all that will change the speed of the wave.
Answer:
To send a pulse of different speed, change the tension or stretch on the spring
Explanation:
A pulse is a single disturbance of a particle is a medium. The pulse has an amplitude or and a pulse length in the medium. The speed of the pulse is dependent on the amount of strain or tension ( stretch) applied to the medium. The speed also determines the length of the pulse but is unaffected by the or amplitude of the pulse.
An object weighing 49 N is pushed across a floor by a force of 12 N. What is the acceleration of the object?
Answer:
Explanation:
Given parameters:
Weight of object = 49N
Force applied = 12N
Unknown:
Acceleration of object = ?
Solution:
The acceleration of the object is found by dividing the force by the weight;
Acceleration = [tex]\frac{12}{49}[/tex] = 0.25m/s²
A stone takes 5.4 seconds to fall from the top of a cliff. The cliff is
meters high.
143
53
286
573
Answer:
143
Explanation:
Using one of the 3 fundamental equations in physics, y=vo*t+1/2gt^2, we can use this equation to find the total distance that was traveled.
Acceleration due to gravity is always 9.8m/s^2 and time is 5.4s, we also have no initial velocity.
Given this, we can plug in the known variables.
y=0t+1/2*9.8*5^2
simplify,
y=4.9*5.4^2
y=4.9*29.16
y=142.884m which we can round up to 143 meters
Final Answer: 143 meters
What factors affect the amount of potential and kinetic energy a roller coaster has
Answer:
As the roller coaster goes higher, more potential energy is increased in the roller coaster. Caused by gravity and the roller coaster's position, the potential energy is stored in the roller coaster. For example, this ball is at the top of a hill, where potential energy is at it's highest. Potential energy can be calculated by Potential Energy=Mass X Acceleration X Height.
Explanation:
The factor that impact the amount of potential and kinetic energy should be explained below.
Factor impact the amount of energy:Since the roller coaster should be high which there should be more potential energy and the same should be increased.
Due to the gravity and the position of the roller coaster the potential energy should be stored in the rolar coaster.
Just like when the ball is in the top of the hill when there is high potential energy so in this way it should be impacted.
learn more about energy here: https://brainly.com/question/12052751
A rock thrown with a horizontal velocity of 20m/s from a cliff that is 125m above level ground. If air resistance is negligible, the time that it takes the rock to fall to the ground from the cliff is most nearly A.3s B.5s C.6s D.12s E.25s
Answer: c
Explanation: 125/20 =6.25
which situation will cause an object moving at constant speed to speed up
Answer:
If external is force applied
Explanation:
Answer:A net force greater than 0
Explanation:
Just do the test
What happens to the pressure as air rises from the ground into the atmosphere?
Does it increase or decrease?
Answer:
please try brainlist answer
As the atmosphere expands the further you get from the Earth's surface, it becomes less dense and air pressure decreases. As you increase altitude (distance from Earth's surface) in an airplane, air pressure changes
कृपया ब्रेनलिस्ट का उत्तर केवल 1more उत्तर देने का प्रयास करें।
Which type of air mass forms over the ocean near the equator?
A
moist and warm
B
moist and cool
C
dry and warm
D
dry and cool
Answer:
a
Explanation:
Which of the following is the keyboard shortcut for saving a document?
O Control V
O Control S
O Control A
O Control E
Answer:Control S, Command S on MAC=Save
Which of the following is most accurate statement about both light and sound wave
1 point
An unfortunate bug splatters against the windshield of a moving car.
Compared to the acceleration of the car, the acceleration of the bug is
Answer:the same
Explanation:their moving at the same speed and collapse
According to Newton's law, the force exerted by the bug and car is equal and opposite. Thus their acceleration decreases as mass increases. Therefore the acceleration of bug will be greater than that of the car.
What is acceleration?Acceleration, in physics is the rate of change in velocity. Thus it has the unit m/s². Newton's second law of motion states that the force acting on a moving body is the product of its mass and acceleration.
Hence F= m a indicates that the acceleration is in inverse proportionality with the mass. Thus a body with greater mass will have smaller acceleration but greater force.
According to third law of motion, an action have an equal opposite reaction. Thus the force exerted by the bug on the car and the force exerted by the car on bug are equal and opposite where, the bug will have greater acceleration due to its less mass.
To find more on acceleration, refer here:
https://brainly.com/question/12550364
#SPJ6
A certain mass of a gas occupies 2 litres at 27 °C and 100
pascal. Find the temperature when volume and pressure
become half of their initial values.
pls give with solution pls pls
Answer:
75k
Explanation:
You can see solution in the picture
is it possible that the existence of two different angle of incidence of a single angle of deviation
Answer:
Yes
Explanation:
It is possible that the existence of two different angle of incidence of a single angle of deviation.
This is possible according to the principle of the reversibility of light which explains its formed in a prism.
When a ray is incident on the first surface it then emerges out of the second surface and could allow another ray to be incident on second.
Which is true of the greenhouse effect?
A. It is purely a manmade phenomenon.
B. it does not involve carbon dioxide.
C. It causes cooling of Earth's atmosphere.
C. it traps thermal energy from the Sun.
Answer:
c is correct option thanks to brainly
What is the weight of the body under the influence of a force of 10N reaches a speed of 1.5 m / s in 3s?
Answer:
Explanation:
F=ma
F=10N
A=v-u upon t
=1.5-0 upon 3
=0.5m per second squared
Then do force divided by. Accelaration and multiply by gravity.
Electric power is to be generated by installing a hydraulic turbine-generator at a site 70 m below the free surface of a large water reservoir that can supply water at a rate of 1500 kg/s steadily. If the mechanical power output of the turbine is 800 kW and the electric power generation is 750 kW, determine the turbine efficiency and the combined turbine–generator efficiency of this plant. Neglect losses in the pipes.
Answer:
[tex]\eta_{turbine} = 0.777 = 77.7\%[/tex]
[tex]\eta_{combined} = 0.728 = 72.8\%[/tex]
Explanation:
First we calculate the power input to the turbine. The input power will be equal to the potential energy of water per unit time:
Input Power = [tex]P_{in} = \frac{Work}{Time} = \frac{Potential\ Energy\ of\ Water}{t} \\P_{in} = \frac{(mass)(g)(height)}{Time} = (mass flow rate)(g)(height)\\\\P_{in} = (1500\ kg/s)(9.81\ m/s^2)(70\ m)\\P_{in} = 1.03\ x\ 10^6\ W = 1030\ KW[/tex]
Now, for turbine efficiency:
[tex]\eta_{turbine} = \frac{Mechanical\ Power\ Out}{P_{in}}\\\\\eta_{turbine} = \frac{800\ KW}{1030\ KW}\\\\\eta_{turbine} = 0.777 = 77.7\%[/tex]
for generator efficiency:
[tex]\eta_{generator} = \frac{Power\ Generation}{Mechanical\ Power\ Out}\\\\ \eta_{generator} = \frac{750\ KW}{800\ KW}\\\\\eta_{turbine} = 0.9375 = 93.75\%[/tex]
Now, for combined efficiency:
[tex]\eta_{combined} = \eta_{turbine}\ \eta_{generator}\\\\\eta_{combined} = (0.777)(0.937)\\\eta_{combined} = 0.728 = 72.8\%[/tex]
Which pair of concurrent forces could produce a resultant force having a magnitude of 10. Newtons?
The pair of concurrent forces will be of 5 N to make the magnitude of net force as 10 N.
Given data:
The magnitude of resultant force is, [tex]F_{net}=10 \;\rm N[/tex].
The given problem is based on the concept of concurrent forces which says that, If the forces applied to a body are such that their lines of action meet at a single point, then they are called concurrent forces.
Now to obtain the value of concurrent forces, let us consider the forces F and F' to be acting along a linear direction. Such that the net force is given as,
[tex]F_{net}=F+F'[/tex]
Then for 10 N of net force, the pair of concurrent force is,
[tex]10=F+F'\\\\10=5+5\\\\10=10[/tex]
Thus, we conclude that the pair of concurrent forces will be of 5 N to make the magnitude of net force as 10 N.
Learn more about the concurrent force here:
https://brainly.com/question/2411525
A change in the structure of DNA in the egg cell could result in a
Answer: A mutation
Explanation: because it changes the DNA sequence of a gene
What is the difference between the geographic North Pole and the magnetic north pole?
Answer:
Magnetic north is the direction towards the north magnetic pole, which is a wandering point where the Earth's magnetic field goes vertically down into the planet
Explanation:
I searched it up lol
41. What effects the efficiency of a pulley?
a. the type of rope or cable
b. the way the wheel turns
c. the length of the rope
d. how big the wheel is
e. only a and be
f. all of the above
Answer:
e. only a and b
Should the resistance of an ammeter low or high ?give reason
Answer:
The resistance of an ammeter should be low. This is because an ammeter is connected in series with the circuit for the measurement of electric current. In case, its resistance is high, then some amount of current may lost in heating it leading to the inaccurate reading. An ideal ammeter is one which has zero resistance.
What is the density of an object with a mass of 20 grams and a volume of 5 cm?
Answer:
4
Explanation:
Divide mass(m) by volume(v), you get density(D)
m/v=D
20/5=4
a strong lightning bolt transfers about 25 C to earth. how many electrons are transferred?
Answer:
[tex]n = 1.563x {10}^{20} [/tex]
Write 2 laws of reflection of light
Answer:
Answer⤵i)The first law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror, all lie in the same plane. ii)The second law of reflection states that the angle of reflection is equal to the angle of incidence. Both angles are measured with respect to the normal to the mirror.Help please!!!
if superman at 90kg jumps a 40m building in a single bound how much work does superman perform
Answer:
5 years worth of work (aka all of the homework i currently have)
A car with a mass of 1600 kg is towing a trailer with a mass of 420 kg. The car
provides a forward thrust of 3300 N. What is the acceleration of the trailer?
Answer:
1.63366
Explanation:
I got this answer from calculator soups physics calculators. I really recommend their website for formulas.
Which of the following is an example of light energy being changed to chemical energy?
A flashlight with rechargeable batteries
A solar panel that charges a battery
Food that is eaten to provide mechanical energy
A switch that flips up to turn on a light
Answer:
solar panels that charges battery
