a net force of 219 N is exterted on a rock. the rock has an acceleration of 3m/s^2 due to this force. what is the mass of the rock
Answers
Answer:
73 kgExplanation:
The mass of the object can be found by using the formula
\(m = \frac{f}{a} \\ \)
f is the force
a is the acceleration
From the question we have
\(m = \frac{219}{3} \\ \)
We have the final answer as
73 kgHope this helps you
Related Questions
The Earth's core is divided into two layers, a solid inner core, and a liquid
outer core? True or false
Answers
Make I the subject
E=VIt
Answers
To Make I the subject you need to get it by itself. To do this divide both sides by V and t:
I = E/Vt
Find f(3) and f'(3) assuming that the tangent line to y = f(x) at a =3 has equation y=5x 2
Answers
The f(3) of the line tangent to y is determined as 45 and the f'(3) is determined as 30.
F(3) for the line tangent to y
The f(3) for the line tangent to y is calculated as follows;
y = f(x)
y = 5x²
f(3) = 5(3)²
f(3) = 45
f'(3) for the line tangent to yThe solution to the first derivate of the line tangent to y is calculated as follows;
f' = dy/dx = 10x
f'(3) = 10(3) = 30
Thus, the f(3) of the line tangent to y is determined as 45 and the f'(3) is determined as 30.
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The graph shows a speed time graph of a car driving a long a busy road. calculate the acceleration of the car
Answers
Acceleration is defined as the rate of change of velocity, so it is the change in velocity divided by the time taken.
To calculate the acceleration of the car from the speed time graph, we need to determine the change in speed over a specific time interval.
If the speed time graph shows a straight line, we can use the slope of the line to calculate the acceleration. The slope of a straight line is given by the change in y divided by the change in x. In this case, the change in y is the change in speed and the change in x is the change in time.
If the speed time graph shows a curve, we can use the tangent to the curve at a specific point to calculate the acceleration. The tangent represents the instantaneous velocity at that point, and the slope of the tangent gives the instantaneous acceleration.
Once we have calculated the acceleration, we can interpret it in terms of how quickly the car is changing its speed. If the acceleration is positive, the car is speeding up. If the acceleration is negative, the car is slowing down. The magnitude of the acceleration gives us an idea of how quickly the car is changing its speed.
In summary, to calculate the acceleration of a car from a speed time graph, we need to determine the change in speed over a specific time interval. We can use the slope of a straight line or the tangent to a curve to calculate the acceleration. The sign and magnitude of the acceleration give us information about how quickly the car is changing its speed.
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A car accelerates at a constant rate of 1. 83m/s^2 along a flat straight road. The force acting on the car is 1870N. Calculate the mass of the car
Answers
The mass of the car is calculated as 1021.86 kg. We can calculate the mass of the car by using the formula: mass = Force / acceleration
Given information: Acceleration of the car = 1.83 m/s²
Force acting on the car = 1870 N
We know that Force = mass × acceleration
According to the question, we need to find the mass of the car. We can calculate the mass of the car by using the formula: mass = Force / acceleration
Putting the values in the above equation, we get mass = 1870 N / 1.83 m/s²
So, the mass of the car is: mass = 1021.86 kg
Therefore, the mass of the car is 1021.86 kg.
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How would you describe the motion of a transverse wave
Answers
If you took a balloon of gas and then warmed the balloon in a sunny window, what can now be said about the density of the gas in the balloon
Answers
Explanation:
The density of the gas in the balloon will explode
What values are used for Winds Aloft Forecasts?a)True direction and MPH. B)True direction and knots. C)Magnetic direction and knots
Answers
For Winds Aloft, actual direction and knot values are utilized. forecasts the wind direction and speed at different atmospheric levels above the range of surface weather measurements.
How do you interpret the prediction for winds aloft?The wind direction is indicated by the first two digits: 310 degrees true north. Wind speed is indicated by the next two digits: 27 knots (aviation and sailing traditionally use knots to measure speed, as they are more convenient).
How frequently do winds at altitude occur?Every six hours, the winds aloft are updated globally with a fresh prediction. The predictions are updated every hour for Australia, Europe, and North America. The worldwide predictions have a temporal resolution of every three hours to thirty hours.
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The values used for Winds Aloft Forecasts are True direction and knots. True direction is the wind direction relative to true north and knots is a speed unit indicating the speed of the wind.
Explanation:Winds Aloft Forecasts, also known as upper air or upper wind information, are essential in many fields such as aviation, meteorology and climate studies. The values used for Winds Aloft Forecasts are True direction and knots. The True direction refers to the compass bearing direction from which the wind is coming, and it is relative to the true north, not magnetic north. Knots is a unit of speed used in aviation and maritime contexts, 1 knot equals 1 nautical mile per hour. Therefore, it indicates the speed of the wind. In other words, Winds Aloft Forecasts provide information about the speed and direction of winds at various altitudes.
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how are force and mass related
Answers
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
ILL GIVE BRAINLY THING
Tom has been hired to deliver 11 m3 of sand. If the truck that Tom is driving has a truck bed that is 2.5 m X 1.6 m, X 0.75 m how many trips will Tom need to complete the order?
PLS GO TO MY PROFILE TO SEE THE OTHER QUESTIONS I POSTED I GIVE BRAINLY THING FOR THOSE AS WELL THANK YOU
Answers
Answer:
About 3 trips
Explanation: if we do 2.5m*1.6m*0.75 it equals to 11000 then we divide that to 11m3 and it gives you 3.6 so it will be about 3 times
Thx
what value of r must you use so that the meter will go to full scale when the current i is 70.0 ma ?
Answers
To determine the value of r that will make the meter go to full scale when the current i is 70.0 mA, more information is needed. The value of r depends on the sensitivity or resistance range of the meter. It is typically specified by the manufacturer or indicated on the meter itself.
In general, to achieve full scale deflection, the resistance r should be selected such that it allows the full range of the current to flow through the meter. If the meter has a known sensitivity, the value of r can be calculated using Ohm's Law (V = I * R), where V is the voltage required for full scale deflection and I is the desired current (in this case, 70.0 mA). By rearranging the formula, the value of r can be calculated as R = V/I.
However, without additional details about the specific meter or its specifications, it is not possible to provide a precise value for r.
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If an element forms a 1-ion, in which group of the periodic table would you
expect to find it?
A. 17
Ο Ο
B. 1
C. 2
Ο Ο
D. 18
(It’s A. 17)
Answers
Heat transfer between two substances is affected by specific heat and the
O chemical composition of the substances.
O state of matter of the substances at room temperature.
othermal equilibrium of the substances.
O amount of time and area of physical contact between the substances.
Answers
The correct answer is D. Amount of time and area of physical contact between the substances.
Explanation:
Heat transfer refers to the flow of thermal energy or heat between two or more objects. This process involves multiple factors and implies heat from the hottest object goes to the coldest one until there is an equilibrium. To begin, heat transfer depends on the amount of thermal energy in the objects because objects must have a different amount of thermal energy for heat to flow.
Besides this, the amount of energy that flows depends on the time and the contact between the substances of objects. Indeed, objects need to be in contact or close to each other for heat to transfer, and the time needs to be enough for the process to occur. For example, if you place a pot over the fire just for a few seconds it is likely the heat transferred is minimal, which does not occur if you leave the pot more time. At the same time if the pot is in close contact with fire more heat will be transferred.-
Answer:
the answer is D on edginuity.
Explanation:
An 8.0g bullet, moving at 400 m/s, goes through a stationary block of wood in 4.0 x 10^-4s, emerging at a speed of 100 m/s. (a) what average force did the wood exert on the bullet? (b) how thick is the wood?
Answers
Answer:
Explanation:
Initial velocity (u) of the Bullet = 400 m/sec
Final velocity (v) of the Bullet = 100 m/sec
Bullet passed through the block in (t) = 0.0004 sec
Using 1st Equation of motion :
400 m/s = 100 m/s - a (0.0004)
Deceleration of Bullet = 750,000 m/sec^2
(a) F (force exerted by the wooden block on the bullet) = F (force exerted by the bullet on the wooden block)
F = m * a = 0.008 * 750,000 = 6000 N
(b) Using 3rd Equation of motion :
\(v^{2} = u^{2} - 2aS\)
10000 = 160000 - 2 * 750,000 * S
Thickness of wood (S) = 0.1 m
100 POINTS!! 1. Calculate the current flowing when:
(A) 75 mC pass a point in I min;
(B) 0.5 GC pass a point in 2 hours;
(C) 2.0 MC pass a point in 1000 hours.
2. Calculate the charge flow when the current flow is:
(A) 6.0 A for 5 min;
(B) 250 mA for 4 hours;
(C) 2.5 KA for 50 s.
3. How long does it take for the following to pass a point in the circuit?
(A) 25 MC at a current of 25 mA;
(B) 48 C at a current of 12 A;
(C) 360 C at a current of 4.0 A.
4. A current of 10 cA flows through a resistor of resistance 4.0 ohms
Find the:
(a) P.d across the resistor;
(b) Total charge flow in 3 minutes;
Answers
Current ( I ) = charge(Q) * time(t)
(A) I = 75/1000 * 1*60 = 4.5A
(B) I = 0.5*10^9 * 2*60*60 = 3.6*10^12 A
(C) I = 2*10^-6*1000*60*60 =0.55 A
2) Q = I/t
( A) Q = 6/5*60 = 0.02 C
( B) Q = 250*1000/ 4*60*60 = 17.36 C
( C) Q = 2.5/1000*50 = 5*10^-5 C
3 ) t = I/C
(A) t =25*1000/ 25*10^-6 = 1*10^9 s
(B) t = 12/48 = 0.25 s
(C) t = 4/360 = 0.011 s
4 )
( A) P . d = current * resistance = 10/100 * 4= 0.4V
( B) charge = 10*10^-2/3*60 = 5.55*10^-4 C
What is charge ?
Charge, also known as electric charge, electrical charge, or electrostatic charge and denoted by the symbol q, is a property of a unit of matter that indicates how many more or fewer electrons than protons it contains.
The physical characteristic of matter that causes it to feel a force when exposed to an electromagnetic field is called electric charge. The two types of electric charges that protons and electrons most frequently carry are positive and negative charges.
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Which formula is equivalent to D = m V ?
Answers
The pressure of an ideal gas is 4 atm. If the only change is to increase the temperature by a factor of 4, what will be the new pressure of the gas. Use (Pv=NkT)
Answers
Answer:
The new pressure is 4 times of the initial pressure.
Explanation:
Given that,
The pressure of an ideal gas is 4 atm.
We need to find the change in the pressure of the gas if the temperature by a factor of 4.
We know that,
PV = nKT ....(1)
P = pressure, V = volume, T = temperature
Let P' is the new pressure of the gas. So,
P'V= nK(4T) ......(2)
Dividing equation (1) and (2) we get :
\(\dfrac{P}{P'}=\dfrac{T}{4T}\\\\\dfrac{P}{P'}=\dfrac{1}{4}\\\\P'=4P\)
It means that the new pressure is 4 times of the initial pressure.
A ball is thrown upwards into the air with an initial velocity of 11.83 m/s. What is the maximum height that the ball traveled during that time (assuming there is no air resistance).
Answers
7.11 meters
Explanation
to solve this we need to use this formula:
\(y_{\max }=\frac{(v_f-v_{1)^2}}{2g}\)Step 1
Let
\(\begin{gathered} v_f=0\text{ ( when it reaches the ma}\Xi mun\text{ heigth)} \\ v_0=\text{ initial sp}eed=11.83\text{ m/s} \\ g=9.8\text{ }\frac{\text{m}}{s^2} \end{gathered}\)now,replace and calculate
\(\begin{gathered} y_{\max }=\frac{(v_f-v_{1)^2}}{2g} \\ y_{\max }=\frac{(-11.83\frac{m}{s})^2}{2\cdot9.8\frac{m}{s^2}} \\ y_{\max }=\frac{139.4989}{19.6}m \\ y_{\max }=7.11\text{ m} \end{gathered}\)therefore, the answer is
7.11 meters
I hope this helps you
Light at an angle of incidence of 44.0 degrees moves from air to a liquid. The observed angle of refraction is 31.4 degrees. What is the index of refraction of the liquid? Identify the liquid (Be sure that your calculator is in degree mode). What is the angle of reflection?
Answers
The index of refraction of the liquid is approximately 1.35. The angle of reflection, it is equal to the angle of incidence according to the Law of Reflection. So, the angle of reflection is 44.0 degrees.
To determine the index of refraction of the liquid, we can use Snell's Law, which states:
n1 * sin(angle1) = n2 * sin(angle2)
where n1 and n2 are the indices of refraction for the two media (air and liquid), and angle1 and angle2 are the angles of incidence and refraction, respectively.
In this case, n1 (index of refraction for air) is approximately 1, angle1 (angle of incidence) is 44.0 degrees, and angle2 (angle of refraction) is 31.4 degrees. Plugging these values into Snell's Law, we get:
1 * sin(44.0) = n2 * sin(31.4)
Now, we can solve for n2 (index of refraction for the liquid):
n2 = sin(44.0) / sin(31.4) ≈ 1.35
The index of refraction of the liquid is approximately 1.35. This value is close to the index of refraction of some types of glass or glycerine, but we cannot precisely identify the liquid without more information.
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HEL ME PLEASE I HAVE NO IDEA OF WHAT TO DO!!!!!!
Answers
Answer:
b, the fastest the car has traveled out of those options is 4-5 seconds.
Explanation:
Answer: B because the car traveled the farthest in the shortest amount of time on the graph.
Which event is an example of condensation?
O A. Ice forms on the surface of a puddle.
B. The outside of a glass of ice water becomes moist.
C. Perspiration dries on a person's skin.
D. Fog disappears when the Sun comes out.
Answers
Answer:
Fog forms in a valley
Explanation: that’s the only reasonable response
An example of condensation Fog disappears when the Sun comes out.
What is condensation?Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle.
The process through which the physical state of matter changes from the gaseous phase into the liquid phase Fog disappears when the Sun comes out.
An example of condensation Fog disappears when the Sun comes out.
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Nick carries out an experiment in which he swings a rubber bung around his head on a string. Name the force that causes the centripetal force in this experiment
Answers
When he swings a rubber bung around his head on a string, the centripetal force is caused by the tension in the string.
What is centripetal force?When an object travels in circular path, a force which makes an object to continue to move in circular motion is the centripetal force which is directed towards the center of the path.
Thus, When he swings a rubber bung around his head on a string, the tension force is developed in the string which is in turn balanced by the centripetal force.
Thus, the centripetal force is caused by the tension in the string.
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on landing, your tire blows and the wheel is dented. what action is required to comply with ntsb part 830?
Answers
The National Transportation Safety Board (NTSB) Part 830 regulations require that certain transportation-related events be reported to the NTSB. These regulations apply to various modes of transportation, including aviation, marine, pipeline, and highway.
If a tire blowout on a vehicle results in a dent to the wheel, the specific action required to comply with NTSB Part 830 would depend on the mode of transportation involved and the specific circumstances of the event.
In general, any significant event involving transportation equipment, including damage to a tire or wheel, is required to be reported to the NTSB if it meets the criteria specified in Part 830. The criteria for reporting an event typically include the level of damage, the type of equipment involved, and the potential impact on safety.
It is advisable to consult the NTSB Part 830 regulations or seek the advice of a transportation safety specialist to determine the specific reporting requirements in the event of a tire blowout and wheel damage.
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The equation below is used to calculate the mechanical advantage of an ideal wheel and axle.
mechanical advantage =
wheel radius
__________
axle radius
A student compares two wheel-and-axle simple machines. Machine 1 has a wheel radius of 50 centimeters, and an axle radius of 10 centimeters. Machine 2 has a wheel radius of 100 centimeters, and an axle radius of 10 centimeters. What is true of these simple machines’ mechanical advantage?
A.
Machine 1’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 2.
B.
Machine 1’s mechanical advantage is greater, which means that this machine can move faster than Machine 2.
C.
Machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
D.
Machine 2’s mechanical advantage is greater, which means that this machine can move faster than Machine 1.
Answers
Answer:
b
Explanation:
Machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
Mechanical advantageThe term mechanical advantage is the ratio of the radius of wheel to the radius of the axle for a wheel and axle system.
The true statement about the two machines that were compared; 1 and 2 is that, machine 2’s mechanical advantage is greater, which means that this machine can do more work with less force than Machine 1.
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C
B.
1A.
1
2
3
G.
C.
45 6 8 9 11 12 time(s)
D.
F.
E.
Which section(s) of the graph would indicate that the object is moving forward?
A A and G
B A, F, and G
C Band E
D
A, B, C and G
Answers
Answer:
b
Explanation:
a,f,,and g is correct because it is indicated that object moving forward
Select the characteristic(s) that match the properties of a converging lens. Choose all that apply.
a. It bends parallel rays of light so that they are focused at a point.
b. It is thinner at the middle than at the edges.
c. It is thicker in the middle than at the edges.
d. It bends parallel rays of light so that they spread further apart.
Answers
The characteristics that match the properties of a converging lens are:
a. It bends parallel rays of light so that they are focused at a point.
c. It is thicker in the middle than at the edges.
A converging lens is a type of lens that causes parallel rays of light to converge at a specific point, known as the focal point. This is the main characteristic of a converging lens and is represented by option a. The lens achieves this by refracting (bending) the light rays as they pass through it.
In terms of its shape, a converging lens is thicker in the middle and gradually tapers towards the edges. This curvature causes the lens to refract light in a way that brings the rays closer together, leading to convergence.
This characteristic is represented by option c. The thicker middle part of the lens allows for more significant refraction and bending of the light rays. Option b, which states that a converging lens is thinner at the middle than at the edges, is not correct.
This description corresponds to a diverging lens, which has the opposite effect of a converging lens, causing light rays to spread apart rather than converge. Option d, stating that a converging lens bends parallel rays of light so that they spread further apart, is also incorrect.
Again, this description matches the properties of a diverging lens, which causes light rays to diverge or spread apart.
In summary, a converging lens bends parallel rays of light to focus them at a point and has a thicker middle and thinner edges.
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What type of number is 3π + 1?
Choose all answers that apply:
A. whole number
B. integer
C. rational
D. Irrational
Answers
Answer: It's D
Explanation:
when you look at an object in a mirror, the image is:
Answers
Answer:
When you place an object in front of a mirror, you see the same object in the mirror. This image that appears to be behind the mirror is called the image. The object is the source of the incident rays, and the image is formed by the reflected rays. An image formed by reflection may be real or virtual.
You use a knife to cut a piece of bread. What kind of simple machine are you
using?
A. Wedge
B. Inclined plane
C. Screw
O D. Lever
Answers
Answer:
the answer is A.) Wedge
A knife to cut a piece of bread is a A. Wedge
What is a simple machine?
A simple machine, any of several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to perform work.
since , a wedge is a simple machine with two inclined planes which when put together forms a sharped edge, which forms a triangular shaped tool which can be used to separate portion of two objects .
hence , a knife to cut a piece of bread is a A. Wedge
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Assume that the Earth's magnetic field is produced by a pure dipole at its centre. There will not be any azimuthal variation in the field. Plot the inclination of the field at Earth's surface as a function of latitude. You can write a short Python script to do this if you have no other preferred tools.
If any doubt, can you let me know more details about your doubts?
Answers
The inclination of the Earth's magnetic field at the surface varies with latitude, forming a pattern where the inclination angle increases as we move away from the equator towards the magnetic poles.
To plot the inclination as a function of latitude, we can use the mathematical relationship between latitude (θ) and inclination (I) known as the Geomagnetic Reference Field model. This model approximates the Earth's magnetic field as a dipole and provides a formula to calculate the inclination angle at a given latitude.
Using Python, we can write a script to calculate and plot the inclination values for a range of latitudes. By inputting different latitudes into the formula and plotting the results, we can visualize how the inclination angle changes with latitude. The resulting plot will show a curve where the inclination increases towards the magnetic poles and approaches zero at the equator. This plot helps us understand the spatial variation of Earth's magnetic field and its relationship with latitude.
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