Answer:
In Newtonian mechanics, the gravitational energy possessed by a mass, because of the gravitational field produced by a second mass.
Explanation:
please help with this
Answer:I have to say 56
Explanation: because it is going up by 8
pls help answer embed
Answer:
C = 1.01
Explanation:
Given that,
Mass, m = 75 kg
The terminal velocity of the mass, [tex]v_t=60\ m/s[/tex]
Area of cross section, [tex]A=0.33\ m^2[/tex]
We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,
Weight of the object = drag force
R = W
or
[tex]\dfrac{1}{2}\rho CAv_t^2=mg[/tex]
Where
[tex]\rho[/tex] is the density of air = 1.225 kg/m³
C is drag coefficient
So,
[tex]C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01[/tex]
So, the drag coefficient is 1.01.
1. In the following circuit,which bulb lights first?
A) Bulb A
B) Bulb B
C) Bulb C
D) They all light at the same time
E) A and C light first, B lights after them.
Answer:
Bulb B is the answer
What is the number used as the Gravitational Constant?
Answer:
G is called the constant of gravitation and is equal to 6.67 × 10−11 newton-metre2-kilogram−2.
Explanation:
Not really understanding this, wouldn't mind some help. : )
Explanation:
Given
Mass (m) = 1200 kg
Acceleration (a) = 3 m/s²
Force (F) = ?
We know
F = m * a
= 1200 * 3
= 3600 Newton.
Therefore the force acting on the car is 3600 Newton.
Hope it will help):)
Please help me please I need someone to help me with all this question 1) How do we calculate the momentum of a race car? What part of this changes during a collision? 2) What happening to the momentum of the car when they crash? 3) how does impulse factor into this? 4) what type of collision is it ( ideally) when cars crash into this SAFER barrier?
Answer:
Explanation:
1 ) Momentum of a race car = mass of car x velocity of car . During a collision , an external force acts on the car which changes the momentum of the car in the direction in which force acts .
2 )
The momentum of the car decreases as external force acts against the momentum . Sometimes when external force is very high , direction of momentum is reversed .
3 ) Impulse is force x time of action of force . Generally time of action of force in large collision is very small . so it is calculated very carefully .
Impulse = change in momentum .
4 ) The type of collision is inelastic . In this type of collision , car crashes into safer barrier , sticks to it . It does not rebound from the barrier . In case of elastic collision , rebound creates large impulse creating huge damage to the car .
Engineers at the Space Centre must determine the net force needed for a rockets engine to achieve an acceleration of 70 m/s2. Assume the rocket is in outer space with no gravitational or other forces acting on it. If the mass of the rocket is 45 000 kg, what force is required to be produced by the rocket engines?
Answer:
3,150,000N
Explanation:
According to Newton's second law;
F = mass * acceleration
Given
Mass = 45000kg
acceleration = 70m/s^2
Substitute
F = 45000 * 70
F = 3,150,000N
Hence the force required to be produced by the rocket engines is 3,150,000N
Answer:
3,150,000 Newtons
Explanation:
F=M*A
F=45,000kg times (*) 70 m/s squared
F=3,150,000N (newtons)
The musical tone a piano has a frequency of 346HZ and a wavelength of 1.3 M what is the speed of the sound
Answer:
v= 449.8 m/s
Explanation:
Given data
Frequency= 346Hz
Wave length= 1.4m
The expression below is used to find the speed
[tex]v= f \lambda\\\\[/tex]
substitute
[tex]v= 346*1.3\\\\v= 449.8 m/s[/tex]
Hence the speed is v= 449.8 m/s
Brainliest and a bunch of points- plz help! Also add explanation
Answer:
i believe it's the first one
Explanation:
i'm not entirely sure but i hope this helps :) have a nice day !!
Balanced equations account for the conservation of mass.
Please select the best answer from the choices provided
T
F
Answer:
fff
Explanation:
f
Answer:
True
Explanation:
A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow
which best explains why offspring created through sexual reproduction have greater variation than those created through asexual reproduction
Answer:
its fun
Explanation:
I like fun OWo
A 13.0km bucket is lowered vertically by a rope in which there is 170N of tension at a given instant. Determine the magnitude of the acceleration of the bucket. Is it up or down?
Answer:
13.07m/s2 down
Explanation:
I think the equation would be
Fnet/m=a
since tension is the only force mensioned that means that
170N/13.0kg=13.07 m/s2 down
acceleration is down
Which of the following graphs have the same wavelengths?
Question 1
2 pts
Sally, who has a mass of 56 kg, is sledding at the park. She places her 7-kg sled at the
top of a hill and then runs with a velocity of 3 m/s and jumps on it. What is the
combined velocity of Sally and the sled right after she jumps on, in m/s? (Round your
answer to one decimal place if necessary.)
Question 2
2 pts
If a light ray from a candle strikes a mirror at an angle of 40 degrees with the normal, at what angle will the ray reflect?
A. 20 degrees
B. 25 degrees
C. 40 degrees
D. 60 degrees
E. 80 degrees
Answer: 20
Explanation:
HELP I GIVE BRAINLIST
what are the drawbacks of relying on fossil fuels ?
A ) Increased levels of atmospheric carbon dioxide
B ) A reduction of air pollution levels in cities
C ) Unlimited supplies of coal, oil, and natural gas
D ) Fossil fuels always burn perfectly, so there are no drawbacks
Answer:
A) Increased levels of atmospheric carbon dioxide
Explanation:
All of the other options are positive effects
What is the name of this muscle?
Answer:
shoulder
it is at the shoulder region
Explanation:
shoulder
WILL GIVE BRAINLIEST
The first, fourth, and fifth answers are correct.
Sally pulls a sledge
a ball of mass 1kg is being suspended 10m above the ground & is then dropped. what is the balls kinetic energy just before it hits that ground ?
a. 10 J
b. 98 J
c. 50 J
d. 0 J
Answer:
E = 98 J
Explanation:
Given that,
The mass of a ball, m = 1 kg
It is being suspended 10m above the ground & is then dropped.
We need to find the ball's kinetic energy just before it hits that ground. The conservation of energy holds here. It means, the kinetic energy just before it hits that ground is equal to its potential energy i.e.
[tex]E=mgh\\\\E=1\times 10\times 9.8\\\\E=98\ J[/tex]
so, the required energy is 98 J. Hence, the correct option is (b) "98 J".
What is the number of
Protons-
Electrons-
Neutrons-
that are in bismuth?
Explanation:
Number of :
Protons - 83
Neutrons - 126
Electrons - 83
In Bismuth.
Also it has a atomic mass of 208.98038 units.
Examples of electric forces?
Answer:
Explanation:
The examples of electric force are
The charge in a bulb.
Electric circuits.
Static friction between cloth when rubbed by a dryer.
The shock that is felt after touching a doorknob.
How can circular motion be accelerated when speed is constant?
A. Because of the accelerator pedal in the vehicle
B. Because Newton said
C. Because direction changes
D. Because the vehicle has circular wheels
Answer:
Correct answer is C: Because direction changes.
Explanation:
Hope you have a wonderful weekend.
HELPPP PLEASE I GIVE BRAINLIST
handles on kitchen stove pots are usually made of wood mainly because of ?
A ) Conduction
B ) Convection
C ) Radiation
D ) Condensation
Answer:
(B) Conduction
Explanation:
Answer:
a ) conduction
Explanation:
it's a because if u think about it a conductor keeps the heat from getting to a certain part of the metal
What were the organic compounds Professor Wadhwa found and why are they important?
Answer:
Organic compounds are important because all living organisms contain carbon. They are the basic components of many of the cycles that drive the earth. For example, the carbon cycle that includes the exchange of carbon between plants and animals in photosynthesis and cellular respiration.
When a tree sloth is moving up a tree trunk with a velocity of 0.743 m/s, how long would it take the sloth to travel 22.30 meters?
Answer:
30.0 s
Explanation:
i found the answer
Can we track the movement of energy in nature
A. Ears
B. Air
C. Water
D. Rocks
Answer:
A Ears
Explanation:
hgvjjghingyjbvh
Describe how a magnetic field moves in a magnet. plz help!!
Answer:
In a permanent magnet, the magnetic field comes from the motion of the electrons inside the material, or, more precisely, from something called the electron spin. The electron spin is a bit like the Earth spinning on its axis. The magnetic field is a vector, the same way the electric field is.
Explanation:
What is a set in Gym?
Answer:
repetitions of a certain exercise
Explanation: