Answer:
3 m/s^2
Explanation:
acceleration = vf-vi/t = (30 m/s-0 m/s)/10 s = 3 m/s^2
Study the three loops shown below. For each loop, state which of the bulbs will light when the
!!!!PLZ HELP!!!!!
connections are made.
2.
A) bulb A
B) bulb B
C) both bulbs
D) neither bulb
A) bulb A
B) bulb B
C) both bulbs
D) neither bulb
I
A man who weights 900 N stands on a platform scale in a elevator the elevator has made 4000 kg the reading on the scale is 700 N
Answer:
a = -2.17 m / s²
Explanation:
In this problem you must ask for the acceleration of the elevator.
Let's use Newton's second law
F-W = ma
a =[tex]\frac{F}{m} - g[/tex] F / m-g
the weight of the body is 900 N and the force is the reading of the scale, let's find the mass
w = mg
m = w / g
m = 900 / 9.8
m = 91.84 kg
let's calculate
a = 700 / 91.84 - 9.8
a = -2.17 m / s²
The negative sign indicates that the elevator is going down
A 2.0 kg cart has a momentum of 10.0 kg m/s. What is its velocity?
A.)22 m/s
B.) 2.0 m/s
C.) 5.0 m/s
D.) 20. m/s
Answer:
[tex]\boxed {\boxed {\sf C. \ 5.0 \ m/s}}[/tex]
Explanation:
Momentum is the product of mass and velocity. The formula is:
[tex]p=mv[/tex]
The mass of the cart is 2.0 kilograms. The momentum is 10.0 kg m/s. The velocity is unknown.
[tex]m= 2.0 \ kg \\p= 10.0 \ kg \ m/s[/tex]
Substitute the values into the formula.
[tex]10.0 \ kg \ m/s= (2.0 \ kg ) v[/tex]
We want to solve for the velocity (v). Therefore we must isolate the variable. It is being multiplied and the inverse of multiplication is division. Divide both sides of the equation by 2.0 kg.
[tex]\frac { 10.0 \ kg \ m/s}{2.0 \ kg}=\frac{(2.0 \ kg )v}{2.0 \ kg}[/tex]
The kilograms will cancel each other out.
[tex]\frac { 10.0 \ m/s}{2.0}=v[/tex]
[tex]5.0 \ m/s=v[/tex]
The velocity is 5 meters per second.
A man is using a fishing rod to catch fish in figure 1.
Figure 2 is a simplified diagram of figure 1 with the forces and distances.
Calculate the force F, in figure 2.
Answer:
Explanation:
Remark
In general, these 3rd class levers are very inefficient. Because the force distance is smaller than the load distance, you need to pull upward with more force that the weight of the load. So whatever the load is, the force is going to be much greater.
The distances are always measured to the pivot unless you are asked something specific otherwise.
Givens
F = ?
weight = 6N
Force Distance = F*d = 0.5 m
Weight Distance =W*d1 = 2 m
Formula
F*Fd = W*Wd
Solution
F*0.5 = 6 * 2 Divide by 0.5
F = 12/0.5
F = 24 N upwards
what is pressure in thermodynamics
At what point does a rubber band have the most elastic potential energy? Explain.
Answer:
You input potential (stored) energy into the rubber band system when you stretched the rubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. ... When the rubber band is released, the potential energy is quickly converted to kinetic (motion) energy.
Explanation:
Grade 6-7
1. A diver who climbs up to the 30 meter high dive
board gains 12000J of GPE. What is her mass?
2. A football kicked 11.5 meters in the air gains
63.25J of GPE. What is the mass of the football?
3. Explain, using calculations, why a pole vaulter
who competes on another planet wouldn't have
the same GPE as on Earth.
Answer:
1. m = 40 kg
2. m = 0.55 kg
3. Because of the different values of acceleration due to gravity, g, on the planet and the earth.
Explanation:
1. GPE = 12000 J
h = 30 meters
g = 10 m/[tex]s^{2}[/tex]
But,
GPE = mgh
where: m is the mass, g is the acceleration due to gravity, and h is the height.
12000 = m x 10 x 30
12000 = 300 m
m = [tex]\frac{12000}{300}[/tex]
= 40 kg
The mass of the diver is 40 kg.
2. GPE = 63.25 J
h = 11.5 meters
g = 10 m/[tex]s^{2}[/tex]
GPE = mgh
63.25 = m x 10 x 11.5
63.25 = 115 m
m = [tex]\frac{63.25}{115}[/tex]
= 0.55 kg
The mass of the ball is 0.55 kg.
3. The pole vaulter's GPE on the earth would not be the same as that on another planet due to the variation in the value of the acceleration due to gravity on the two planets, even if he cover the same height.
Given that: m = 60 kg, h = 25 m, determine the GPE on the earth that has g = 10 m/[tex]s^{2}[/tex], and another planet with g = 6.5 m/
Thus, on the earth;
GPE = mgh
= 60 x 10 x 25
= 15000
GPE = 15000 J
On the planet;
GPE = mgh
= 60 x 6.5 x 25
= 9750
GPE = 9750 J
the change in velocity over time is called acceleration
Answer:What' the question?
Explanation:
Answer:
Explanation:
Your answer is correct
What is the kinetic energy of a 4 kg toy car moving at 5 m/s?
Answer:
50 J
Explanation:
<3
list sources of noise pollution in your surroundings
-Sounds of Vehicles
-Speakers or TV's at High Volume
-Kitchen Appliances
-Electronic Appliances
-Barking of dogs
Answer:
there are many
Explanation:
includeing planes
loud music
cars
traffic noise
Earth's outer layer is divided into sections called plates.
True or false
Answer:
True
Explanation:
The earth is divided into huge slabs called tectonic plates.
PLEASE HURRY!!!
How much time would it take for the sound of thunder to travel at an average speed of 330 meters per second a distance of 8000
Explain how the embryological development of different species reveals similarities of organisms that are not evident in the fully formed anatomy.
Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.
Explanation:
Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.
(Have a great day :D)
Electrons surround the nucleus in orbitals.
True or False
Answer:
true
hope this helps !
(03.05 LC)
A. Propane, a renewable resource, is used in some heating systems.
B. Wind power can turn turbines to generate electrical power.
C. Oil, a renewable resource, is processed to make jet fuel.
D. Geothermal power is generated from moving water.
I dont see the question to this
Answer:
The correct answer would be B
Explanation:
I took the test and we use wind and turbines to create a renewable energy source.
where did the scientific revoluton began
Answer: The scientific revolution began in Europe toward the end of the Renaissance period, and continued through the late 18th century, influencing the intellectual social movement known as the Enlightenment
Explanation:
The force of the pulley is 652 newtons. It accelerates at 53 m/s. How much does the object weigh. a 1230 grams b 1.230 gram c 123.0 grams d 12.30 Grams
Answer:
d. 12.30 grams
Explanation:
Given the following data;
Force = 652 N
Acceleration = 53 m/s²
To find how much the object weigh, we would need to determine its mass;
Force = mass * acceleration
652 = mass * 53
Mass = 652/53
Mass = 12.30 grams.
Therefore, the object weighs 12.30 grams.
Which statement best describes twins with identical DNA?
O A. The twins will not be similar physically but may have similar behaviors.
OB. The twins will not share any similarities.
c. The twins will be identical physically and behaviorally.
D. The twins will be very similar physically but will have some unique behaviors.
The best description of twins with identical DNA is that the twins will be identical physically and behaviorally. Thus, the correct option is C.
What are the identical DNA twins?Identical twins are also called as the monozygotic twins which result from the fertilization of a single egg by a single sperm, or with the fertilized egg which are then splitting into two individual offspring. Identical twins share the same genomes and are also of the same sex.
Identical twins are also called as monozygotic twins, these result from the fertilization of a single egg by a single sperm, with the fertilized egg which then splitting into two identical cells. Identical twins share the same genomes and are always of the same sex.
Therefore, the correct option is C.
Learn more about DNA here:
https://brainly.com/question/21668095
#SPJ6
Which is one
step that geologists use to find the epicenter of an earthquake?
Answer:
triangulation
Explanation:
using your compass
Answer:
B. they measure the difference between arrival of P waves and S waves.
Explanation:
Benny can’t get the metal lid off a new glass jar of jam. His mother tells him to run hot water carefully over the lid. He does this and is able to unscrew the lid easily. Explain what happened. Use these terms in your answer: Heat, temperature, specific heat, and thermal expansion
Answer:
The cap expanded
Explanation:
As you run hot water (Or any substance) onto something it expands, With coldwater it shrinks. Its like clothes, If a shirt is to small wash it in hot water. If it is to big run it in cold water.
Urgent!
What is the mass of a baseball that has a kinetic energy of 4.8 J and is traveling at 8 m/s?
A. 0.15 J
B. 0.15 kg
C. 0.075 J
D. 0.075 kg
Answer: .15
Explanation:
K.E. = 1/2 mv2
so m = 2 (K.E.)/v2
so m = 2 (4.8)/64 = .15
Are Styrofoam and wood the same temperature, if they are not what are each others temperature
I will give brainliest :)
A car moving with an initial velocity of 36 m/s slows down at a constant rate of -2.8 m/s^2 . What distance does the car travel after 3 seconds of deceleration? Remember to include units in your answer! *
Answer:
the distance covered by the car is 95.4 m.
Explanation:
Given;
initial velocity of the car, u = 36 m/s
acceleration of the car, a = -2.8 m/s²
time of motion of the car, t = 3 s
The distance covered by the car is calculated as;
s = ut + ¹/₂at²
s = 36(3) + ¹/₂ x (-2.8)(3)²
s = 108 - 12.6
s = 95.4 m
Therefore, the distance covered by the car is 95.4 m.
The diagram shows the flow of water through a hydroelectric power station. The falling water
turns the turbines. The movement of the turbines causes the electrical generators to generate
electricity
Write the equation which links kinetic energy, mass and speed. 5
(1 Point)
Answer:
KE = [tex]\frac{1}{2}[/tex] m[tex]v^{2}[/tex]
Explanation:
In the generation of energy from hydroelectric power station, the motion of water, and the turbines are paramount. The falling flowing water turns the blades of the turbine, which in-turn causes the movement of a coil within a strong magnetic field.
The motion of the coil which cuts the strong magnetic field induces current. Thus, the system generates electrical energy.
The equation that links kinetic energy (KE), mass (m) and speed (v) can be expressed as:
KE = [tex]\frac{1}{2}[/tex] m[tex]v^{2}[/tex]
What part of the brain is most affected with overuse of cell phones, video games, etc.
A 4.50 kilogram block of wood at 20.0°C is uniformly heated using 90,000. joules of heat. What will be the resulting
temperature of the block? (Cp for wood = 1,800. J/kg-°C)
Answer:
Final temperature, T2 = 31.11°C
Explanation:
Given the following data;
Mass = 4.5kg
Initial temperature = 20°C
Quantity of heat = 90000J
Specific heat capacity = 1,800. J/kg-°C
To find the final temperature;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making dt the subject of formula, we have;
[tex] dt = \frac {Q}{mc} [/tex]
Substituting into the equation, we have;
[tex] dt = \frac {90000}{4.5*1800} [/tex]
[tex] dt = \frac {90000}{8100} [/tex]
dt = 11.11°C
Now, to find the final temperature T2;
But, dt = T2 - T1
Substituting into the equation, we have;
T2 = 11.11 + 20
Final temperature, T2 = 31.11°C
A cannonball is fired perfectly horizontally from the top of a 210 m tall cliff. It is fired with an initial velocity of 50 m/s. What is the horizontal distance covered by the cannonball before it hits the ground?
Answer:
the horizontal distance covered by the cannonball before it hits the ground is 327.5 m
Explanation:
Given;
height of the cliff, h = 210 m
initial horizontal velocity of the cannonball, Ux = 50 m/s
initial vertical velocity of the cannonball, Uy = 0
The time for the cannonball to reach the ground is calculated as;
[tex]h = u_yt - \frac{1}{2} gt^2\\\\h = 0 - \frac{1}{2} gt^2\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 210}{9.8} }\\\\t = 6.55 \ s[/tex]
The horizontal distance covered by the cannonball before it hits the ground is calculated as;
[tex]X = U_x \times \ t\\\\X = 50 \times \ 6.55\\\\X = 327.5 \ m[/tex]
Therefore, the horizontal distance covered by the cannonball before it hits the ground is 327.5 m
can y'all please help me I really need you guys or just give me an idea or wrote the first paragraph please
A coil of wire can become a temporary magnet if connected to a battery
O True
O False
Answer:
true
Explanation:
An Electromagnet is called as a temporary magnet, because electromagnet is made up of insulated copper wire wrapped around soft iron, which allows current to flow in it and at that moment iron gains it magnetic properties and when the current is switched off, then there will be no flow of current and hence iron loses its magnetic properties.
Hence it works temporarily as long as electric current flows in a conductor and hence known as temporary magnet. .
TRUE or FALSE: Feeling "weightless" can be the result of accelerating downwards towards Earth.
A. TRUE
B. FALSE