Answer:
coal
Explanation:
I need help with this practice I’m struggling to solve it
The blades on the turbines transform the energy coming from the wind into rotational kinetic energy.
The blades convert wind energy into rotational energy.
(1) Viewers of Star Trek hear of an antimatter drive on the Starship Enterprise. One possibility for such a futuristic energy source is to store antimatter charged particles in a vacuum chamber, circulating in a magnetic field, and then extract them as needed. Antimatter annihilates with normal matter, producing pure energy. What strength magnetic field is needed to hold antiprotons, moving at 5.0 x 10^7 m/s in a circular path 2.00 m in radius? Antiprotons have the same mass as protons but the opposite (negative) charge.
(2) Is this field strength obtainable with today’s technology or is it a futuristic possibility?
Solution :
The relationship between the strength of magnetic field and the radiusof a charged particle's path is obtained through Newton's second law, which is given by :
F = ma
F = qvB and \($a=\frac{v^2}{r}$\)
Substituting these values in the second law of Newton,
\($qvB=\frac{mv^2}{r}$\)
Now solving for B, we get:
\($B = \frac{mv}{rq}$\)
\($=\frac{(1.67 \times 10^{-27})(5 \times 10^{7})}{2\times 1.6 \times 10^{-19}}$\)
= 0.261 T
The field strength can be obtained by using the technology of today.
A net force of 75 pounds acts on a body of 25 slugs. The body is initially at rest. What is its acceleration during the action of the force?
The correct answer is 0.91 m/\(s^2\).
The pace at which a body increases its velocity is what is meant by the phrase "acceleration." It always moves in the same direction as the body when it moves.
The acceleration of an object is equal to the net force exerted on it divided by its mass, or a = F m, in accordance with Newton's second rule of motion. When the mass of an item and the net force acting on it are known, the acceleration of that object can be determined using this equation for acceleration.
Force F = 75 ponds = 33.62 N
initial velocity y =0
mass m = 25 slungs = 364.848 kg
time t = 12s
Acceleration of the body,
Acceleration = F/m
Acceleration = 333.62/364.848
Acceleration = 0.91 m/\(s^2\)
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Define measurement.
Answer:
Measurement is the comparison of any physical quantity of an object to a standard unit which is pre-determined. The standard units such as length, time, mass etc are known as the Fundamental units of Measurement.
Explanation:
Any object that can be measured is known as a physical quantity. So, to measure the physical quantity, we require some standard units. A measurement consists of two parts - the numerical measurement and the standard unit which is pre-determined. For example, the length of a given table is 10cm, which implies that 10 is the numerical value and the standard unit of measurement is centimeter (cm).
Measurements can be both Fundamental and Derived. Examples of Fundamental quantities are Length, Time etc, while example of Derived quantity is speed which is derived from Length and Time.
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The specific heat of human body is 3,500 J/kg/°C. When a 84 kg person runs, she generates 3.6 MJ of heat in an hour. Suppose she did not sweat. Find the rise in body temperature in °C.
The rise in temperature of the body as determined from the specific heat capacity, mass, and heat change of the body is 12.24 °C.
What is the rise in temperature of the body?The rise in temperature of the body is determined from the specific heat capacity, mass, and heat change of the body.
The formula relating the temperature rise of the body, the specific heat capacity, mass, and heat change of the body is given below:
Heat change = mass * specific heat capacity * temperature rise
Temperature rise = Heat change / mass * specific heat capacity
Temperature rise = 3.6 * 10⁶ J / 84 kg * 3,500 J/kg/°C
Temepartaure rise = 12.24 °C
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A non-conducting spherical thick shell, of inner radius a and outer radius 2a, carries a charge per unit volume density. Calculate the electrostatic potential energy of this system g
Answer: Electrostatic potential energy of the given system is
U=1/4π∈*(96/5)*Q²/a
Explanation:
consider spherical shell of inner radius a (taken as x) and outer radius 2a ,carrying charge Q and volume charge density ρ=Q/4π(2a)³...........................(1)
then voume of the shell=4πx²dx
charge on the shell inner part of the shell.q1=4πx²dx ρ
charge on this ,in case of sphereical type,q2=4/3*πx³ ρ
then electrostatic energy of sperical charge of radius a (which we taken as x) and sperical shell of radius x and thickness dx is,
dU=1/4π∈ *(q1q2)/x
by placing value of q1 and q2 from above , we will get a equation
dU=1/4π∈*(16/3*π²ρ²x \(x^{4}\)dx
then total electrostatic energy of sperical charge by integrating from limit a to 2a and putting value of ρ then we will get
U=1/4π∈*(96/5)Q²/a
How do I find the mass in kg
To find the mass in kilograms, you need to know the object's weight in newtons and the acceleration due to gravity. The formula for finding mass is mass = weight / acceleration due to gravity. So if you have an object with a weight of 100 N and the acceleration due to gravity is 9.8 m/s^2, the mass would be 10.204 kg.
The mass of the block is 0.025 kg or 25 g, when the spring has k = 28 N/m, and compresses 0.11 m before bringing the block to rest.
When a block is dropped onto a spring with k=28 N/m, the block has a speed of 3.2 m/s just before it strikes the spring. If the spring compresses an amount of 0.11 m before bringing the block to rest, what is the mass of the block?The formula for the spring potential energy is given as follows; PE = (1/2) kx² where k is the spring constant and x is the amount of deformation of the spring. Substituting the values given;PE = (1/2) 28 (0.11)²PE = 0.16972 J. According to the law of conservation of energy, the potential energy stored in the spring at maximum compression is equal to the kinetic energy the block had before it struck the spring;KE = (1/2) mv²where m is the mass of the block and v is its velocity.Substituting the values;0.16972 = (1/2) m (3.2)²m = 0.025 kg or 25 gTherefore, the mass of the block is 0.025 kg or 25 g.For more questions on mass
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Which gives a greater current: 40 coulombs in 10 seconds or 2 coulombs in 1 second?
The first scenario results in a higher current of 4 amperes.
What is the current produced in both scenario?
Current is defined as the amount of charge flowing per unit time.
For the first scenario, 40 coulombs in 10 seconds, the current would be:
I = Q/t = 40 C / 10 s = 4 A
For the second scenario, 2 coulombs in 1 second, the current would be:
I = Q/t = 2 C / 1 s = 2 A
Therefore, the first scenario results in a higher current of 4 amperes than the second scenario of 2 amperes current.
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A flat circular coil carrying a current of 8.80 A has a magnetic dipole moment of 0.194 A⋅m2 to the left. Its area vector A⃗ is 4.0 cm2 to the left.
a) How many turns does the coil have?
b) An observer is on the coil's axis to the left of the coil and is looking toward the coil. Does the observer see a clockwise or counterclockwise current?
c) If a huge 45.0 T external magnetic field directed out of the paper is applied to the coil, what magnitude of torque results?
d) What direction of torque results?
Hi there!
a)
We can use the equation for the magnetic dipole moment to solve for the number of turns:
\(\mu_m = NIA\vec{n}\)
\(\mu_m\) = Magnetic dipole moment (0.194 Am²)
N = Number of loops (?)
A = Area of loop (4.0 cm²)
\(\vec{n}\) denotes the area vector, or the normal line perpendicular to the area.
We first need to convert cm² to m² using dimensional analysis.
\(4.0 cm^2 * \frac{0.01m}{1 cm} * \frac{0.01 m}{1cm} = 0.0004 m^2\)
Rearranging the equation to solve for 'N':
\(N = \frac{\mu_m}{IA}\\\\N = \frac{0.194}{(8.8)(0.0004)} = \boxed{55.11 \text{ turns}}\)
**Since we cannot have part of a turn, the coil has about 55 turns.
b)
For this, we can use the Right-Hand-Rule for current. Looking at the coil from the left with your curled fingers going around the coil with the fingertips pointing through and to the left in the direction of the magnetic moment, your thumb points in the COUNTERCLOCKWISE direction.
c)
Now, let's use the equation for the torque produced by a magnetic field:
\(\tau = \mu_m \times B\)
This is a cross-product, but since our magnetic field is perpendicular to the magnetic moment, we can disregard it.
Plugging in the values for the magnetic moment and the magnetic field:
\(\tau = 0.194 * 45 = \boxed{8.73 Nm}\)
d)
Using the other RHR (current, field, force), the coil will spin about its vertical axis in the field. In more detail, if you look at the coil from the left-hand side with its opening towards you, from this perspective, the left of the coil will come towards you, and the right side of the coil will move away.
Find the component form of the vector that represents the velocity of a plane descending at a speed of 100mph at an angle of 30° below the horizontal, as shown
below.
30
The horizontal and vertical component of the velocity of the plane is 50(√3) mph and 50mph.
Velocity is defined as the ratio of displacement and time and the unit of velocity is m/s. The velocity is the vector quantity. The horizontal and vertical component is given as:
Horizontal component (x) = V cosθ
Vertical component(y) = V sinθ
From the given:
velocity fo the plane = 100mph
angle (θ) = 30°
The horizontal component (x) = V cosθ = 100×cos(30°) = 100 × √3/2
= 50 √3
The vertical component (y) = V sin(θ) = 100×sin(30°) = 100×1/2
= 50
Thus, the horizontal and vertical components of the plane are (50√3,50) mph.
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SuperPointParticleDog is playing tug of war with two other dogs, Isaac and Newton. Isaac is pulling with a force of 255 N, 13 degrees North of East on one rope attached to a ball. Newton is pulling with a force of 156 N, 34 degrees South of East on another rope attached to the ball. If the ball is moving with constant momentum toward SuperPointParticleDog, what is the East/West component of her force on the ball?
The East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).
How to explain tje informationIsaac's force:
Magnitude: 255 N
Angle: 13 degrees North of East
x-component: 255*cos(13) = 245.1 N (Eastward)
y-component: 255*sin(13) = 58.1 N (Northward)
Newton's force:
Magnitude: 156 N
Angle: 34 degrees South of East
x-component: 156*cos(34) = 129.4 N (Westward)
y-component: 156*sin(34) = 86.5 N (Southward)
Now we can add the x- and y-components of the forces to find the net force:
Net force:
x-component: 245.1 N - 129.4 N = 115.7 N (Eastward)
y-component: 58.1 N - 86.5 N = -28.4 N (Southward)
The net force has an Eastward component of 115.7 N. Therefore, the East/West component of SuperPointParticleDog's force on the ball is -115.7 N. (Westward).
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Consider the following scenario. A car for which friction is not negligible accelerates from rest down a hill, running out of gasoline after a short distance (see below). The driver lets the car coast farther down the hill, then up and over a small crest. He then coasts down that hill into a gas station, where he brakes to a stop and fills the tank with gasoline. Identify the forms of energy the car has, and how they are changed and transferred in this series of events.
Answer:
1) U-> K +W
2) K -> W
Explanation:
In this exercise, care must be taken as they indicate that the friction force (rubbing) is not negligible.
1 part at the top of the hill the car has gravitational potential energy, which is transformed in a part into kinetic energy and another part into heat by the work of the friction force that opposes the movement.
2 part when the other hill rises it loses kinetic energy that is transformed into gravitational potential energy and part in heat due to the work of the friction force on this hill.
3rd part in the last descent all the gravitational potential energy is transformed into kinetic energy and the application of the brakes is transformed into heat due to the negative lock of the friction force and filled with gasoline that has chemical energy that can be transformed in the engine.
I attempted to answer and got 0m, please explain how to get to the answer.
A cannonball is fired straight up with an initial velocity of 150 m/s. How high will it get before it stops moving upward (it comes to a temporary stop before falling back down)?
The maximum height to which the ball attain before falling back down is 1147.96 m
Data obtained from the questionThe following data were obtained from the question:
Initial velocity (u) = 150 m/sFinal velocity (v) = 0 m/s (at maximum height) Acceleration due to gravity (g) = 9.8 m/s²Maximum height (h) =?How to determine the maximum heightThe maximum height reached by the ball can be obtained as illustrated below:
v² = u² – 2gh (since the ball is going against gravity)
0² = 150² – (2 × 9.8 × h)
0 = 22500 – 19.6h
Collect like terms
0 – 22500 = –19.6h
–22500 = –19.6h
Divide both side by –19.6
h = –22500 / –19.6
h = 1147.96 m
Thus, the maximum height reached by the ball is 1147.96 m
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True or False: The motion of the plates over the surface of the Earth occurs at a noticeable and fairly rapid rate.
Question 4 of 10
Which of the following describes the reactants of a chemical reaction?
OA. The chemicals on the right side of a chemical equation
B. The substances that are formed
OC. The substances that are made
O D. The chemicals on the left side of a chemical equation
The substances that are altered and the chemicals on the right side of a chemical equation are the results of a chemical reaction. B and D are the appropriate choices.
Reactants are the substance(s) in a chemical equation to the left of the arrow. A component that is present at the outset of a chemical reaction is known as a reactant. Products are the substance(s) to the right of the arrow. A substance that remains after a chemical reaction is complete is known as a product. The creation of products from the reaction of two reactants is known as a chemical reaction. The compounds that result from a reaction are called products. The substances that are original materials are the reactants.
On the left side of the reaction are the reactants, and on the right are the products. B and D are the proper choices as a result.
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The jogger ran 3km east.
4. Look at the bottom figure. Suppose that a car is 20 km due north of New York City. The car
travels north toward Albany until it is 100 km due north of New York City.
Answer: d
Explanation:
Determine the angle between the directions of vector A with rightwards arrow on top = 3.00i + 1.00j and vector B with rightwards arrow on top = -3.00i + 3.00j.
A) 117°
B) 88.1°
C) 26.6°
D) 30.0°
E) 45.2°
Answer:
C) 26.6
Explanation:
I don't know how to calculate vector
The angle between the two vectors is 117⁰
The given parameters;
vector A = 3.00i + 1.00j
vector B = -3.00i + 3.00j
The angle between the two vectors is calculated as follows;
\(cos \ \theta = \frac{A\ . \ B}{|A| \ . \ |B|}\)
The dot product of vector A and B is calculated as;
\(A \ . \ B = (3i \ + j) \ . \ (-3i \ + 3j) = (3\times -3) + (1 \times 3) = -9 + 3 =- 6\)
The magnitude of vector A and B is calculated as;
\(|A| = \sqrt{3^2 + 1^2} = \sqrt{10} \\\\|B| = \sqrt{(-3)^2 + (3)^2} = \sqrt{18}\)
The angle between the two vectors is calculated as;
\(cos \ \theta = \frac{-6}{\sqrt{10} \ . \sqrt{18} } \\\\cos \ \theta = \frac{-6}{\sqrt{180} } \\\\cos \ \theta = -0.4472\\\\\theta = cos \ ^{-1} (-0.4472) \\\\\theta = 116.6^0 \approx 117^0\)
Thus, the angle between the two vectors is 117⁰
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Helppppppppppppppppppppppppppppp
Answer:
Option #3 is your answer.
Explanation:
Bioelectrical impedance analysis is a commercially available method used to estimate body fat percentage. The device applies a small potential between two parts of the patient's body and measures the current that flows through. With an estimate of the resistance individually of the muscle and fat between the two points, the composition of the tissue can be estimated. Assume that the muscle and fat tissue can be modeled as resistors in parallel.Part AIf the resistance of fat is 3 times that of muscle, what is the resistance of fat if a 1 mA current is measured when potential difference of 0.5 V is applied to the patient's arm?2000 Ω500 Ω1500 Ω375 ΩPart BIf the resistance through the fat is 6 times that through the muscle, how much of the total current goes though the fat in terms of the current through the muscle?16 times the current through the muscle6 times the current through the muscleNo current passes through the fat.The same current as through the musclePart CIf a potential difference of 1 V is applied across the patient's arm, what is the potential drop across the patient's fat?1 V0.67 V0.33 V0 VPart DIf the measured resistance of the patient's arm is 750 Ω and the resistance of fat is 3 times that of muscle, what is the resistance of the muscle?1000 Ω560 Ω3000 Ω187.5 Ω
A) The resistance is 2000 ohm. B) 6 times the current through the muscle. C) The voltage is 1 volt. D) The resistance is 1000 ohms.
A)
r = resistance of muscle
R = resistance of fat
given that: R = 3r
Rtotal = total resistance = R × r /(R + r) = 3r2 /4r= 0.75 r
V = potential difference = 1 Volts
I = current = 1 mA = 0.001 A
Using Ohm's law:
V = I × R(total)
0.5 = (0.001) × (0.75r)
r = 666.67
R = 3r = 3 x 666.67 = 2000
Hence, The resistance is 2000 ohm.
b)
1/6 times the current through the muscle.
since muscle and fat are in parallel, they have the same voltage across each, hence
i(muscle) × R(muscle) = i(fat) × R(fat)
i(muscle) × R(muscle) = i(fat) × 6 × R(muscle)
i(fat) = (1/6) i(muscle)
Therefore, 6 times the current through the muscle.
c)
since fat and muscle are in parallel
Hence, V(fat) = 1 Volts
Hence, The voltage is 1 volt.
d)
R(arm) = arm resistance = 750
R(fat) = fat resistance
R(muscle) = muscle resistance
given that
R(fat) = 3 R(muscle)
since fat and muscle are in parallel their combination is given as
R(arm) = R(fat) × R(muscle) ÷ (R(fat) + R(muscle) )
750 = (3 R(muscle) )R(muscle) ÷ ((3 R(muscle))+ R(muscle) )
750 = 3 R(muscle) /4
R(muscle) = 1000
Therefore, The resistance is 1000 ohms.
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An organ pipe of length L has one end closed but the other end open. What is the wavelength of the fundamental node emitted?
a. Slightly smaller than 4 L
b. Slightly larger than 4 L c. Roughly equal to 3/2
d. Slightly larger than 2 L
Answer:analize a afirmacao a seguir e tudo que envolve o gerenciamento da marca e que ultrapassa as acoes com objetivos economicos e refere se a cultura principios e valores
Explanation:
(Figure 1) shows a thin liquid film bounded on the right side by a sliding wire that is attached to a spring with spring constant 0.50 N/m. The spring is stretched by 1.3 cm. What is the liquid's surface tension in mN/m?
The liquid's surface tension in N/m is determined as 0.25 N/m.
What is surface tension?
Surface tension is defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.
Mathematically, the formula for surface tension of a liquid is given as;
γ = F/L
γ = F/2x
where;
F is the applied forcex is the extension of the springγ is the surface tensionFrom Hooke's law, the force applied on an elastic material is directly proportional to the extension of the material.
F = kx
where;
k is the spring constantx is the extension of the springThe final equation for the surface tension of the liquid film becomes;
γ = F/2x
γ = kx/2x
γ = k/2
γ = (0.5 N/m) / 2
γ = 0.25 N/m
Thus, the surface tension of a liquid depends on the applied force and length of the liquid surface.
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A car travels 8km in 7 minutes. Find the speed of the car.
Answer:
42.6083 mi/h
Explanation:
Given: A car travels 8km in 7 minutes.
To find: Find the speed of the car.
Formula: \(Speed = \frac{Distance}{Time}\)
Solution: Since the formula for the speed of an object (which is the car) is speed = distance ÷ time, divide the distance (8km) by the time (7min)
Speed = 42.6083 miles per hour
Thunderclouds typically develop voltage differences of about 1×108V. Given that an electric field of 3×106V/m is required to produce an electrical spark within a volume of air, estimate the length of a thundercloud lightning bolt.
The Length of the thundercloud lightning bolt is 33.33 m.
What is length?This can be defined as the distance between two point.
To calculate the length of the thundercloud, we use the formula below.
Formula: E = V/L............ Equation 1Where:
E = Electric field of the thundercloudV = Potential difference L = Length of the thundercloud.Make L the subject of the equation
L = V/E............... Equation 2From the question,
Given:
V = 1×10⁸ VE = 3×10⁶ V/mSubstitute these values into equation 2
L = (1×10⁸)/(3×10⁶)L = 100/3L = 33.33 mHence, The Length of the thundercloud lightning bolt is 33.33 m.
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I need help with this answer
Answer:
double replacement
Explanation:
sorry if im wrong
A particle has a charge of q = +4.7 μC and is located at the origin.
(a) When the particle is stationary, it will only experience a force due to the electric field. The force is given by:
F = qE
where q is the particle's charge as well as E is the electric field.
Substituting the given values, we have:
F = (4.9 × 10⁻⁶ C)(242 N/C) = 1.19 × 10⁻³N
The net force is directed in the +x direction.
What is magnetic force?Magnetic force is the force that arises between two magnetic objects or between a magnetic object and a moving charged particle. It is one of the four fundamental forces of nature, the others being the strong nuclear force, the weak nuclear force, and gravity.
The magnetic force is caused by the interaction between magnetic fields. When two magnetic objects are brought near each other, their magnetic fields interact and exert a force on each other.
(b) When the particle is moving along the +x axis at a speed of 345 m/s, it will experience both electric and magnetic forces. The electric force will be the same as in part (a). The Lorentz force equation may be utilized to calculate magnetic force:
F = q(v x B)
where v is the particle's velocity and B is the magnetic field.
Substituting the given values, we have:
F = (4.9 × 10⁻⁶ C)(345 m/s)(1.9 T) = 3.28 × 10⁻³ N
The right-hand rule can be used to determine the direction of the magnetic force. If you point your thumb in the direction of the velocity vector (+x axis) and your fingers in the direction of the magnetic field vector (+x and +y axes), your palm will face in the direction of the magnetic force vector, which is in the +z direction.
Therefore, the net force on the particle is given by the vector sum of the electric and magnetic forces:
Fnet = (1.19 × 10⁻³ N) + (3.28 × 10⁻³ N) = 4.47 × 10⁻³ N
The net force is directed in the +z direction.
(c) When the particle is moving along the +z axis at a speed of 345 m/s, it will only experience a magnetic force. The magnetic force can be calculated using the same equation as in part (b):
F = q(v x B)
where v is the particle's velocity and B is the magnetic field.
Substituting the given values, we have:
F = (4.9 × 10⁻⁶ C)(345 m/s)(1.9 T) = 3.28 × 10⁻³ N
The right-hand rule can be used to determine the direction of the magnetic force. If you point your thumb in the direction of the velocity vector (+z axis) and your fingers in the direction of the magnetic field vector (+x and +y axes), your palm will face in the direction of the magnetic force vector, which is in the -y direction.
Therefore, the net force on the particle is given by the magnetic force:
Fnet = 3.28 × 10⁻³ N
The net force is directed in the +y direction.
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How does a wind turbine transform mechanical energy into electrical energy?
Answer:
"A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion. As wind moves past the blades of a wind turbine, it moves or rotates the blades. These blades turn a generator."
what units of measurement measures both velocity and speed
Answer:
\(metre \: per \: second\)
Explanation:
Velocity is a derived quantity and the S.I unit is metre per second.Speed is also a derived quantity which is has the S.I unit to be metre per second.
The second step to the scientific method is:
form a hypothesis.
ask a question.
Operform a test.
share the results.
The second step of the scientific method is to form a hypothesis. Thus, the correct option for this question is A.
What is a Scientific method?A scientific method may be defined as the complete procedure through which the objectives of any experiment are established facts through testing and experimentation. There are numerous steps of the scientific method exist.
The basic steps of the scientific methods are as follows:
Construct an observation, Form a hypothesis.Making a prediction. Conducting an experiment.Analyzing the results.It is a systematic and well-regulated approach that involves in obtaining information about a scientific nature or obtaining a desired material or product.
Therefore, the second step of the scientific method is to form a hypothesis. Thus, the correct option for this question is A.
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If Mrs. Burgess feels a force of 711 N pulling her down to Earth, what is her mass? What is her weight?
Answer:
71.1kg
Explanation:
force = weight = 711N
weight = mass × gravitational field strength
711N = mass × 10N/kg
mass = 711N ÷ 10N/kg
= 71.1kg
take note: gravitational field strength on earth is always 10N/kg!!
Why are the orbits of planets only nearly circular and not perfectly circular?
PLEASE HELP!!!!!!!!!!!!!
Explanation:
this is my answer this is helpful for you