Answer:
40m/s
Explanation:
momentum = mass * velocity
momentum / mass = velocity
2400kg*m/s / 60kg = 40m/s
Rahul runs a distance of 12
km with an average speed of 4.5 km/h and
Rita runs 1.6 km within 15 minutes. Who
runs faster?
Answer:
Rita runs faster
Explanation:
To obtain the answer to the question given, we determine the speed of Rita. This can be obtained as follow:
Distance = 1.6 km
Time = 15 mins
Speed =?
Next, we shall convert 15 mins to hour. This can be obtained as follow:
60 mins = 1 h
Therefore,
15 mins = 15 mins × 1 h / 60 mins
15 mins = 0.25 h
Thus, 15 mins is equivalent to 0.25 h.
Finally, we shall determine speed of Rita as follow:
Distance = 1.6 km
Time = 0.25 h
Speed =?
Speed = distance / time
Speed = 1.6 / 0.25
Speed = 6.4 Km/h
Thus Rita's speed is 6.4 Km/h
Comparing the speed of Rahul and Rita
Rahul's speed = 4.5 km/h
Rita's speed = 6.4 Km/h
We can see that Rita's speed is greater than Rahul's speed. This simply indicates that Rita runs faster than Rahul.
What is the kinetic energy of a jogger with a mass of 65.0 kg traveling at a speed of 2.5m/s
Answer:
203.1J
Explanation:
Given parameters:
Mass = 65kg
Speed = 2.5m/s
Unknown:
Kinetic energy of jogger = ?
Solution:
To solve this problem, we use the kinetic energy equation:
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the velocity
Now insert the parameters and solve;
K.E = [tex]\frac{1}{2}[/tex] x 65 x 2.5² = 203.1J
What type of energy is stored in the nucleus of an atom?
Answer:
Nuclear energy
Explanation:
The nucleus holds the energy together
Two balls, a foam ball and a golf ball, are placed into a pail of water. The golf ball sinks. Why does a foam ball float and a golf ball sink when both are placed into water?
Answer:
The golf ball has a greater mass than the foam ball
Explanation:
A crate of books is dragged horizontally across a rought floor at a constant
velocity. If the normal force acting on the crate is 66 Newtons, determine the
mass of the crate.
Answer:
m = 6.73 kg
Explanation:
Given that,
The normal force acting on the crate = 66 N
We need to find the mass of the crate.
Normal force = weight of the crate
N = mg
m is mass of the crate
[tex]m=\dfrac{N}{g}\\\\m=\dfrac{66}{9.8}\\\\m=6.73\ kg[/tex]
So, the mass of the carte is 6.73 kg.
You are riding a skateboard and hit a hole in the street, causing you to fly off the board and crash. Which law represents this action? *
Answer:
It's Laws of Motion
Explanation:
SOMEONE HELP PLEASE ASAP ITS TIMED
A boy is slowly pushing a box across the floor. In which direction is friction occurring?
a. away from the boy
b. toward the boy
c. up
d. down
Please I need help with this question (see image).
Show workings where necessary.
Answer:
Solution:
i) Heat supplied by heater = Heat gained by water = m * c*theta = 0.12Kg * 4200 * 10 = 5040Joules in 2 minutes.
ii) Power = Energy/time = 5040J/(2 * 60seconds) = 5040J/120seconds = 42Watts.
(iii) Heat supplied to the 70g of water = m * c * theta = 0.07Kg * 4200 * 9K = 2646J
(iv) Heat supplied by heater = Heat gained by 70g of water + Heat supplied to the metal vessel.
But,from our calculations above,
Heat supplied by heater = 5040J ......and
Heat supplied to the 70g of water = 2646J
.: substituting the values,we have that :
5040J = 2646J + Heat supplied to the metal vessel.
5040J - 2646J = Heat supplied to the metal vessel.
.: Heat supplied to the metal vessel = 2394J.
(v) Heat gained by metal vessel = Heat capacity of the vessel * theta.
2394J = Heat capacity of the vessel * 9K
.: Heat capacity of the vessel = 2394/9 = 266(Joule per Kelvin)
(vi) Using the formula:
Heat Capacity = mass * specific heat capacity
.: Specific heat capacity = Heat Capacity/mass = 266/0.55 = 484(Joules per Kilogram per Kelvin)
Explanation:
________❤️ hope it helps you ❤️__________Which is a possible result of rising ocean temperatures caused by global warming?
formation of dust bowls
increase in strength of hurricanes
rapid evaporation of water in soil
decrease in population due to health threats
Answer:
Increase in strength of hurricanes
Explanation:
A possible result of rising ocean temperatures caused by global warming is increase in strength of hurricanes.
What is global warming?Global warming is an environmental concern characterized by the gradual increase in the Earth's atmospheric temperature.
Global warming can lead to the rise of temperature in air and oceans as well.
One consequence of an increase in ocean temperature is that the strength of hurricanes, which is strong wind accompanied by rain, will be increased.
Therefore, a possible result of rising ocean temperatures caused by global warming is increase in strength of hurricanes.
Learn more about global warming at: https://brainly.com/question/12908180
Kyle runs 20 m north, 20 m west and then 20 m south, what is Kyles’s total displacement?
Answer:
Displacement = 20 m
Explanation:
Given that,
Kyle runs 20 m north, 20 m west and then 20 m south.
We need to find Kyles's total displacement.
Total distance = shortest path covered by Kyles.
The net displacement of Kyle is 20 m in east direction. Hence, this is the required solution.
Kinetic energy and mass are ________ proportional.
Answer:
The Kinetic energy and mass are _directly_ proportional.
Explanation:
We know that Kinetic Energy is basically termed as the capacity of a body to do work.
Kinetic energy is often used to associate with moving objects, therefore, K.E is normally termed as the energy of motion.
The formula of K.E of an object of mass and velocity is defined
K.E = 1/2mv²
From the formula, it is clear that K.E is directly proportional to its mass and also directly proportional to the square of its velocity.
For example,
If A toy plane with a mass of 10 kg is flying at 20 m/s. Its K.E will be:
m = 10 kgv = 20 m/sK.E = 1/2mv²
= 1/2(10)(20)²
= 1/2(10)(400)
= 5(400)
= 2000 J
Now, let suppose, if we double the mass of a toy plane i.e.
m = 20 kg
so
K.E = 1/2mv²
= 1/2(20)(20)²
= 1/2(20)(400)
= 10(400)
= 400 J
Therefore, the K.E is doubled when doubled the mass.
Therefore, the Kinetic energy and mass are _directly_ proportional.
Answer:
directly
Explanation:
What element does the picture represent? (Use the periodic table if you need to) *
(1 Point)
nitrogen
O chlorine
O oxygen
what types of forces can move an object?
When is the world going to end? Give me your opinions and the reasons why you think that.
Answer:
probably when the next pandemic happens
Roller coasters accelerates from initial speed of 6.0 M/S2 final speed of 70 M/S over four seconds. What is the acceleration?
Answer:
[tex]a=16\ m/s^2[/tex]
Explanation:
Motion With Constant Acceleration
It's a type of motion in which the velocity of an object changes uniformly in time.
The formula to calculate the change of velocities is:
[tex]v_f=v_o+at[/tex]
Where:
a = acceleration
vo = initial speed
vf = final speed
t = time
The roller coaster moves from vo=6 m/s to vf=70 m/s in t=4 seconds. To calculate the acceleration, solve for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
[tex]\displaystyle a=\frac{70-6}{4}=\frac{64}{4}[/tex]
[tex]\boxed{a=16\ m/s^2}[/tex]
What is the acceleration for an object moving with constant speed? Explain your answer
Answer:
What is the acceleration of an object moving at a constant speed?
The Meaning of Constant Acceleration
The data table above show an object changing its velocity by 10 m/s in each consecutive second. This is referred to as a constant acceleration since the velocity is changing by a constant amount each second.
Answer:
there is no acceleration for an object moving with constant speed
Explanation:
it is because acceleration is change in velocity and constant means same or without any change so there is no acceleration for an object which is moving with same speed
hope it helps:)
Which is a possible result of higher air temperatures caused by global warming?
increase in sea level
freezing of polar ice caps
rapid evaporation of water in the soil
flooding of low-lying coastal areas
Answer: C. rapid evaporation of water in the soil :)
A possible result of higher air temperatures caused by global warming is rapid evaporation of water in the soil.
What is global warming and its causes and consequences?Global warming is a phenomenon that has been registered around the world during the last decades. It refers to a progressive increase in the average temperatures of the oceans and the Earth's atmosphere, which has consequences for flora and fauna, in addition to impacting critical sectors such as agribusiness.
Among the consequences of global warming are melting ice, rising sea levels, desertification, changes in rainfall, floods and reduced biodiversity.
See more about global warming at brainly.com/question/12908180
What is the difference between catastrophism and uniformitarianism
Explanation:
Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.
Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.
Catastrophism presents a drastic and rapid evolution of the crust. Uniformitarianism takes a gradual approach to events and suggests that we can use the present to unravel the past.What is the direction of the net force when one force is pulling down and one force is pushing to the right?
Answer: If the net force on an object is zero, its acceleration will be zero. For example in free fall, the net force on an object equals its weight - the one force pulling on it. If 2 forces push or pull on an object in opposite directions, and the two forces cancel .
Explanation: PLEASE MARK ME AS BRAINLIEST!
We have that the direction of the net force when one force is pulling down and one force is pushing to the right is given as
[tex]\theta=tan^{-1}(\frac{Down force}{Right force})[/tex]
From the question we are told that:
One force is pulling down and one force is pushing to the right
Generally,
When two or more forces are acting in the same direction we have that the Resultant for or net for is a sum of the forces involved
Therefore
When one force is pulling down and one force is pushing to the right the Net force is in a direction that obeys the law
[tex]\theta=tan^{-1}\frac{y-axis\ force}{x-axis\ force}[/tex]
Therefore
[tex]\theta=tan^{-1}(\frac{Down force}{Right force})[/tex]
In conclusion
The direction of the net force when one force is pulling down and one force is pushing to the right is given as
[tex]\theta=tan^{-1}(\frac{Down force}{Right force})[/tex]
For more information on this visit
https://brainly.com/question/16380983
help pls .. Which process produces the energy that powers a solar calculator?
Answer:
C) Nuclear fusion
Explanation: You had it correct
Answer:
Nuclear fusion
Explanation: Answer choice C
If a car is traveling forward at 15 M/S, how fast will be going in 1.2 seconds if the acceleration is 10 M/s2?
Answer:
Vf=27m/s
Explanation:
Vf=Vi+at
Lets substitute the known variables into the equation:
Vf=15+10×1.2
Vf=27m/s
So itll be going 27metres per second
b. Find the centripetal force needed to keep an 60.0 kg rider traveling in a circle in the ride.
Given:
m =
v = (from part a)
r=
Unknown:
F=?
Equation:
F= m (v^2) / r
Answer:
loloololo
lol
Explanation:
lolloolololo
1. When the two cars have the same mass, what is true about their
velocities?
Answer:
I mean they have the same amount of velocity
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Acceleration Due to Gravity - Free Fall
V=V;+gt
vir initial velocity (m/s)
=final velocity (m/s)
g=gravity (10 m/s2)
t = time (s)
1. What is the velocity of a dropped object after it has fallen
downward for 3.0s?
V=V;+gt
Vi = 0
8 = 10
t = 3
2. A brick is thrown down off a bridge with a velocity of 5 m/s. What
is its velocity after it has fallen for 2 seconds?
I
3. An arrow is launched straight up from the ground. It reaches its
highest point in 6 s. What velocity was it released at?
a b c d
A V=V+gt
dhehehdhehdhshehehehehehe
Help me plz i'll mark brainliest
Answer:
a PDF is what u use to upload an assignment to turn it in to get graded
List three ways light can be grouped based on how much light shines through or passes through them
Answer:
Materials can be classified based on the amount of light they transmit. Materials, which allow complete transmission of light, are called transparent. Any object can be seen through a transparent material. One example of transparent material is pure glass.
Explanation:
Does this help ?
Answer:
light, materials, and shadows
Explanation:
hope this helps have a good rest of your day :) sorry if incorrect
What happens when you call someone using your cell phone?
A. Microwaves travel from your cell phone directly to the cell phone
of the person you are calling.
B. Microwaves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
C. A system of satellites orbiting Earth receives the microwave
signals and sends them to the person you are calling.
D. Sound waves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
Answer: B, Microwaves reach a cell tower, then fiber optic cables send the signal to a cell tower near the person you are calling.
Explanation:
Answer:D. Sound waves reach a cell tower, then fiber optic cables send the
signal to a cell tower near the person you are calling.
Explanation: just got it right
what is 1=1?????????????????????????????//// HELP
Answer:
I am pretty sure that it is one
Answer:
Explanation: is 1
A person who is heavier than the standard for the person’s height is _____
A. overweight.
B. obese.
C. hefty.
D. extremely obese.
Answer:
A. overweight
Explanation:
Answer:
c
Explanation:
since of his lack of growing his body dont know what to do with the needed fat so while he's still growing its in his tummy waiting
when a person holds a ball above earth's surface, where is this potential energy stored?
Answer:
in the ball
Explanation:
potential energy is where an object has energy, always, but it isn't always moving, and when you drop the ball, it has kinetic energy.