Answer:
B
Explanation:
if the roller coaster is 127 meters tall and has 622,300 J of potential energy how much does it weigh/ what is the mass?
Answer:
500 kg
Explanation:
using the formula Potential energy (p.e)=mgh where g= acceleration due to gravity whose value is 9.8
so,pe =mgh
622300=m*9.8*127
m=500kg
Answer plzz
How do we apply Interval Training to our lower body for a workout?
PLS ANSWER FAST WILL GIVE BRAINLEST!!!!!!!!!
what is the relationship between speed and kinetic energy? (In other words, how are the two related to one another?) Explain.
Answer:
The kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four.
Found it on the internet
Explanation:
Hope this helps dude
The box is pulled horizontally across the floor by a force of 100 N and opposed by a frictional force of 60 N. The object accelerates at 4 m/s2 .
Answer:
10 kg
Explanation:
first find resultant force by subtracting the forces mass is force ÷ accelerationHelp me please.......
III. A vehicle is travelling 105 km/h on a highway when the driver sees a moose in the
middle of the lane.
A. Determine the distance travelled by the vehicle while the driver is reacting.
Assume the driver's reaction time is 1.50 S.
The electric field 1.22 m from
charge is 1570 N/C, pointing
toward the charge. What is the
charge? Include the sign of the
charge, + or -
(The answer is *10^-7 C. Just fill
in the number, not the power.)
(Unit = C)
Answer:
-2.6
Explanation:
it’s for Acellus
The charge with magnitude and sign is -2.6 x 10⁻⁷ C.
What is electric field?The field developed when a charge is moved. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of charge.
Given, the electric field 1.22 m from charge is 1570 N/C, pointing
toward the charge.
The electric field and charge is related as
E = kq/r²
q = Er²/k
where k = 9 x 10⁹ N.m²/C²
Substitute the given values in the question, we have
q = 1570 x (1.22)² / 9 x 10⁹
q= 2.6 x 10⁻⁷ C.
Thus, the magnitude and sign of charge is -2.6 x 10⁻⁷ C.
Learn more about electric field.
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Can someone please help me with this
Answer:
i dont know about this
Explanation:
what name given to the heat energy received from the sun
Answer:
solar energy
Explanation:
Please mark as the brainliest.
Answer:
The Name of the heat energy from the is called solar energy.
A football player kicked a ball at an angle of 37o above the horizontal with an initial velocity of 20 m/s, what is the maximum height reached by the ball? a. 62 m b. 26 m c. 7.4 m d. 5.1 m
Answer:
H = 8.45 m
Explanation:
Given that,
Angle of projection, [tex]\theta=37^{\circ}[/tex]
The initial velocity of the ball, u = 20 m/s
We need to find the maximum height reached by the ball. The formula for the maximum height is given by :
[tex]H=\dfrac{u^2\sin^2\theta}{2g}\\\\H=\dfrac{(20)^2\times \sin^2(37)}{2\times 9.8}\\\\H=8.45\ m[/tex]
So, the maximum height reached by the ball is 8.45 m.
Susie rolls a bowling ball down the alley and knocks over most of the pins. Explain why fewer pins were knocked over when her little brother rolled a basketball, at the same velocity, down the alley.
Answer:
The force used
Explanation:
This has to be because of the force used. Both Susie and her younger brother might have hit the ball with the same velocity, but they surely couldn't have hit it with the same force. The force with which Susie hurts it is heavier than that with which her younger brother hits it, and as such, Susie gets to fall down more pins than her brother will be able to. The ball has to have a lot of force in it for it to be able to knock off all the pins there. So basically, the more the force, the higher it's chances of hitting all the pins
if a 0.040-kg stone is whirled horizontally on the end of a 60-m string at a speed of 4.4 m/s, what is the centripetal force ? * 0.013 n 4 n 0. 32 n 20.1 n
Answer:
0.013N
Explanation:
[tex]F=\frac{mv^{2} }{r}[/tex]
m=0.04, v=4.4m/s, r=60
F=0.013 N
if a car, going 20 m/s with a mass of 1000kg hits a garbage can, what is the momentum of the can and the car afterwards?
Answer:
Momentum is the product of the mass and velocity of an object.
[tex]p = m \times v[/tex]
[tex]p = 1000kg \times 20 \frac{m}{s} = 20000kg \times \frac{m}{s} [/tex]
Explain with reason that when sunlight is focused on a piece of paper with the help of a convex len the paper will burn.
Answer:
Convex lenses concentrates the light energy to one spot on the paper so that the heat energy accumulates on that one small spot of paper. ... As the heat increases, combustion will occur when the spot becomes too hot and the paper will burn.
Explanation:
Hope it helps!
If you dont mind can you please mark me as brainlest?
Pls help me find the electrons of these 4 questions asap.
Pros and Cons of the Mercator projection as a scientific model.
And
Use what you wrote in the above table and turn it into a paragraph explaining the pros and cons of globes as a scientific model.
Answer:
ok i don't know the answer but I send you tomorrow
If you know any of them, please help!!!!!!
I believe the answer for 1) is
PEgrav = mass • g • height
PEgrav = m *• g • h
The Biot-Savart force law predicts the force on a charge moving ____ to a magnetic field.
a.perpendicular
b.parallel
Pls someone help me!!!!!
Answer:
Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!
Which of the following statements is true?
A. An object with stored energy cannot have mechanical energy.
В.An object with mechanical energy is always able to perform work.
C. An object with potential energy is always in motion.
D An object with kinetic energy is always positioned above the ground.
Answer:
В. An object with mechanical energy is always able to perform work.
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.
Mathematically, it is given by the formula;
Mechanical energy = G.P.E + K.E
Hence, the true statement is that an object with mechanical energy is always able to perform work.
Answer:
B
Explanation:
Answer:
В. An object with mechanical energy is always able to perform work.
Explanation:
Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;
a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.
b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.
Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body and it is measured in Joules.
Mathematically, it is given by the formula;
Mechanical energy = G.P.E + K.E
Hence, the true statement is that an object with mechanical energy is always able to perform work.
What is a parallel universe, and could there potentially be ones that contain doppelgängers of everyone on Earth?
Answer:
what i commented.
Explanation:
Which of the following is NOT considered an invasion game or sport?
A. Lacrosse
b. Golf
c. Football
D.
Capture the Flag
Answer:
Golf
Explanation:
Golf is NOT considered an invasion game or sport
A car of mass 800 kg goes round a corner of radius 65 m at a
speed of 10 m/s.
a) What size force is needed to achieve this?
b) Suggest how this force is likely to be obtained.
c) What force would be needed if the driver approached the
bend at twice the speed?
Answer:
a. Centrifugal force = 1230.77 Newton.
b. Centrifugal force = mv²/r
c. Centrifugal force = 4923.08 Newton.
Explanation:
Given the following data;
Mass = 800kg
Radius = 65m
Velocity = 10m/s
a. To find the force;
Centrifugal force = (800*10²)/65
Centrifugal force = (800*100)/65
Centrifugal force = 80000/65
Centrifugal force = 1230.77 Newton.
b. The force associated with the car is generally referred to as centrifugal force because it's the force required to keep the car in a curved or circular path. It can be calculated using the formula;
Centrifugal force = mv²/r
c. To find the force at twice the speed;
Velocity = 2 * 10 = 20m/s
Centrifugal force = (800*20²)/65
Centrifugal force = (800*400)/65
Centrifugal force = 320000/65
Centrifugal force = 4923.08 Newton.
a. To achieve a car of mass 800 kg goes round a corner of radius 65 m at a speed of 10 m/s , needed 1230.77 Newton centripetal forces.
b. When an object goes round a corner then centripetal forces keep that object moving in a curved path.
c. When speed is twice. then, 4923.07 Newton centripetal forces needed.
a. Given that car of mass 800 kg goes round a corner of radius 65 m at a
speed of 10 m/s.
Centripetal force ,[tex]F=\frac{mv^{2} }{r}[/tex]
Where m is mass, v is speed of object and r is radius.
Substituting all values in above equation.
[tex]F=\frac{800*10^{2} }{65} =1230.77Newton[/tex]
b. Centripetal force is defined as, the force that is necessary to keep an object moving in a curved path and that is directed inward toward the center of rotation.
As a car makes a turn, the force of friction acting upon the turned wheels of the car provides centripetal force required for circular motion.
c. When speed is twice, then [tex]v=10*2=20m/s[/tex]
Centripetal force,[tex]F=\frac{800*20^{2} }{65} =4923.08Newton[/tex]
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A burst of sound takes 0.4 seconds to reach the seabed and return, if speed of sound in water is 1400m/s. what is the depth of water?
Explanation:
Given:
Speed of sound = 1400 m/s
Total time taken = 0.4 seconds
To find:
The depth of water
Solution:
As it take 0.4 seconds for the burst to reach the seabed and return (both ways), we can deduce that it takes 0.2 seconds to reach the seabed (one way).
This is because the speed of sound is a constant.
Now, to find the depth, we use the equation
Speed = Distance/Time
Here, we know the values of speed (1400 m/s) and time (0.2 seconds). Distance is the depth of the water, which we need to find. Let the distance be x.
Therefore
1400 = x/0.2
x = 1400 * 0.2
x = 280 m
We get the depth as 280 metres.
Feel free to ask me if you didn't understand any part.
Hope this helps! :D
What do the flows of energy and matter through an ecosystem have in common?
Please help me answer this question !
Answer:
i believe it's the last one
Explanation:
because the first law of thermodynamics states that energy can be changed from one form to another, but it cannot be created or destroyed.
good luck :)
i hope this helps
have a great day !!
10 turns of wire are closely wound around a pencil as shown in the figure. when measured using a scale as shown, the length of total turns is obtained 25mm. then a) What is the thickness of the wire? b) Express the thickness of the wire in centimetre.
please write correct answer
Answer:
a. The thickness of the wire is 2.5 mm.
b. The wire is 0.25 cm thick.
Explanation:
Number of turns of the wire = 10
The length of total turns = 25 mm
a. The thickness of the wire can be determined by;
thickness of the wire = [tex]\frac{length of total turns}{number of turns}[/tex]
= [tex]\frac{25}{10}[/tex]
= 2.5 mm
Therefore, the wire is 2.5 mm thick.
b. To determine the thickness of the wire in centimetre;
10 mm = 1 cm
So that,
2.5 mm = x
x = [tex]\frac{2.5}{10}[/tex]
= 0.25 cm
The wire is 0.25 cm thick.
How would the force of gravity between two objects change if the mass of
each object were doubled?
A. The force between them would be 2 times larger than with the
initial masses.
B. The force between them would be 1/4 the force with the initial
separation.
C. The force between them would be 4 times larger than with the
initial masses.
D. The force between them would be 1/2 the force with the initial
separation
Answer:
Option C. The force between them would be 4 times larger than with the
initial masses.
Explanation:
To know which option is correct, we shall determine the force of attraction between the two masses when their masses are doubled. This can be obtained as follow:
From:
F = GMₐM₆/ r²
Keeping G/r² constant, we have
F₁ = MₐM₆
Let the initial mass of both objects to be m
F₁ = MₐM₆
F₁ = m × m
F₁ = m²
Next, let the masses of both objects doubles i.e 2m
F₂ = MₐM₆
F₂ = 2m × 2m
F₂ = 4m²
Compare the initial and final force
Initial force (F₁) = m²
Final (F₂) = 4m²
F₂ / F₁ = 4m² / m²
F₂ / F₁ = 4
F₂ = 4F₁ = 4m²
From the above illustrations, we can see that when the mass of both objects doubles, the force between them would be 4 times larger than with the
initial masses.
Thus, option C gives the correct answer to the question.
What is the gravitational energy of a 2.63kg
book when it is lifted 14.29m off the floor?
Give your answer rounded to one place after the
decimal, no units.
Question 3
Answer:
G.P.E = 368.3
Explanation:
Given the following data;
Mass = 2.63kg
Height, h = 14.29m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
[tex] G.P.E = 2.63*9.8*14.29 [/tex]
G.P.E = 368.3
Note: the unit of gravitational potential energy is Joules.
physics!!! please help D:
Scientists classify stars by color: white, red, blue. The color of a star helps to tells us how
______ The star is.
Answer: Hot
Explanation: Scientist use the color of starts to determine how hot the surface temperature is.