Answer:
Explanation:
PE = m * g * h
m = 200 kg
h = 1000 m
g = 9.81
PE = 200 * 9.81 * 1000
PE = 1962000 Joules
A leftward force of 7N is applied to a box while the force of friction is 3N. The weight of the box is 4N as is the normal force. Determine the net force, and its direction acting on the box. (Hint: draw a free body diagram to help you figure it out)
Answer:
0N
Explanation:
When you draw a free body diagram, You have a 7N arrow pointing left, and a 3N arrow pointing right. When you subtract the two, you still have a force of 4N on the left. However, seeing as how gravity is in play at a force of 4N, the two forces cancel out and you get 0N.
when there is a constant unbalanced force applied in the opposite direction as the motion what will happen to speed and acceleration
Answer:
speed will be constant and so no acceleration
Explanation:
the body will move toward the weaker force, but since the forces are constant there will be no acceleration.
An unbalanced force of 20 N is applied to a 4.0 kg mass at rest. What is the
acceleration of the object?
Answer:
5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
We have
[tex]a = \frac{20}{4} = 5 \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
Group 1 on the Periodic Table shares which characteristics?
A. They are all blue.
B. They react with other elements.
C. Almost all are metals.
D. Almost all are soft.
Answer:
b is your answer
Explanation:
Answer:
C
Explanation:
Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table.
Can anyone help meee plzzz
Answer:
the first one is higher
Explanation:
i d k what the second one is
An object is swung in a circle with the radius of 5 m. If the object makes one rotation in 2.2 sec, what is the velocity of the object?
Answer:
14.28 m/s
Explanation:
We use this equation to find ciruclar velocity: v = 2πr/T
Find your given:
r = 5 m
T = 2.2 s
Plug in your given into the equation:
v = 2π(5 m)/2.2 s
v = 14.28 m/s
P(A/B) - P(ANB)
P(B)
P(Girl|Sophomore)
Answer:
9/10
Explanation:
Distance and ___ are really the same quantity. A. length b. direction c. speed d. displacement
Answer:
distance and length are the same quantity
Assume this piston has a maximum pressure rating of 2.5 pounds-force per square inch [psi]. The force applied to the cylindrical piston is 100 newtons [N]. What is the diameter of the piston, in units of inches [in]
Explanation:
Always write what you know first about the problem
The surface of the piston that has the force applied is a circle
The area of a circle is pi x r^2
Pressure is Force / Area
Write this out
P = F / (pi x r^2)
solve for r
sqrt( F / (P x Pi)) = r
But dont forget that d = 2 x r
The diameter of the piston is equal to 3.38 inches.
What is pressure?The pressure can be defined as the force that is applied per unit area. Force will be applied perpendicular to the surface per unit area. pressure can be measured in the unit of pascal. A Pascal can be defined as the pressure exerted by one force Newton on one square area.
The mathematical expression to calculate pressure is:
Pressure = Force/area
Given, the maximum pressure of the piston, P = 2.5 psi
We know that 1 psi = 703.07 Kg/m²
P = 2.5 × 703.07 = 1757.67 Kg/m²
The force applied, F = 100N = 100/ 9.8 Kg = 10.20 Kg
The area of the piston, A = F/P
A = 10.20/1757.67
A = 0.00580 m²
Area of the piston, A = πr²
0.0058 = 3.14 × r²
r = 0.04297 m
Diameter, d = 2r = 0.0859 m
We know that one meter = 39.37 inch
The diameter of the piston, d = 0.0859 × 39.37 = 3.384 inch
Learn more about pressure, here:
https://brainly.com/question/28012687
#SPJ2
An engine creates a 2230 N force that pushes a car forward 58.3 m in 9.40 s. how much power does the engine produce? (unit = W)
Given :
An engine creates a 2230 N force that pushes a car forward 58.3 m in 9.40 s.
To Find :
How much power does the engine produce in Watt.
Solution :
We know, Work done is given by :
[tex]W = F.d\\\\W = 2230 \times 58.3 \ J\\\\W = 130009\ J[/tex]
Now, Power is given by :
[tex]Power = \dfrac{Work \ Done}{Time \ Taken}\\\\P = \dfrac{130009}{9.4}\ W\\\\P = 13830.74\ W[/tex]
Therefore, power produced by engine is 13830.74 W.
please answer its due in 10 mins plsss
Answer:
5kg is 5000gm hope it helps
una pelota se deja caer desde la posición de reposo delo alto de un edificio, sin tomar en cuenta la resistencia del aire, calcula posición y la velocidad de la pelota después de: a) 1 segundo b) 1.5 segundos c) 2.5 segundos
Answer:
You can not find out an answer with this information
Explanation:
Provide some sort of graph
If a bird lands on a tree, is that an example of speed, velocity, or acceleration?
Someone help me with these questions
Answer:
Im not 100% sure so don't completly rely on these answer s
#1 is B
#2 ia B
#3 is A
#4 is A
#5 is A
and i think #6 is A
im 100% sure that 3 and 4 are A tho
Explanation:
Solve these 5 items in your notebook and take a clear and readable photo. PS. You need to balance the equation before u identify the type of chemical reaction.
Answer:
that is not physics pls dont do that again
Explanation:
Brody is barbecuing hamburgers on the grill. He notices that the coals are ready for cooking because he feels the warmth of the coals and sees that they are glowing red. What types of electromagnetic waves is he detecting?
Answer:
i think the answer is infrared
An electron is moving at 7.4x105 m/s perpendicular to a magnetic field. It experiences a force of 2.0x10–13 N. What is the magnetic field strength?
Answer:
1.69 T
Explanation:
Applying,
F = BvqsinФ.................. Equation 1
Where F = Force, B = magnetic field, v = velocity, q = charge on an electron, Ф = angle between the electron and the field.
make B the subject of the equation,
B = F/(vqsinФ)............. Equation 2
From the question,
Given: F = 2.0×10⁻¹³ N, v = 7.4×10⁵ m/s, Ф = 90°
Constant: q = 1.60×10⁻¹⁹ C
Substitute into equation 2
B = 2.0×10⁻¹³/(7.4×10⁵×1.60×10⁻¹⁹×sin90°)
B = 0.169×10
B = 1.69 T
HELLLPPP FAST PLS
Look around and identify at least one acid and one base in your house. Foods, household products, and medicines have acidic or basic properties.
Use the Internet, your library, or science textbooks to learn more about acids and bases. Identify important characteristics, chemical properties, physical properties, pH ranges, and examples of acids and bases. Ideas for reporting the information include: make lists, write a paragraph, or use a Venn diagram. Please make sure to review the grading rubric. You will turn your work in to your instructor.
Include the following information about acids and bases in your work:
Chemical properties
Physical properties
pH
Examples around you
Answer:
Oh I had this question before! :)
Explanation:
Acid - citrus products - the classic one is lemon juice
Anything with a sour taste is acidic
Base - soap, oven cleaner, drain cleaner, baking soda
Basic things are bitter (please don't taste the drain cleaner and oven cleaner)
Integrated circuits are used in virtually all modern electronic
devices to carry out specific tasks.
TRUE
FALSE
Answer:
True.
Explanation:
An electric circuit can be defined as an interconnection of electrical components which creates a path for the flow of electric charge (electrons) due to a driving voltage.
Generally, an electric circuit consists of electrical components such as resistors, capacitors, battery, transistors, switches, inductors, etc.
This electrical network which is usually a closed loop comprises of a device that provides the energy (voltage) to drive electrons or electric current; the device is referred to as a source such as a generator or battery.
Similarly, an integrated circuit (IC) also referred to as microchip can be defined as a semiconductor-based electronic component that comprises of many other tiny electronic components such as capacitors, resistors, transistors, and inductors.
Generally, integrated circuits (ICs) are used in virtually all modern electronic devices to carry out specific tasks or functions such as amplification, timer, oscillation, computer memory, microprocessor, etc.
A charged particle is placed in an external magnetic field and it is moving in a circular path of radius 26m.The magnetic force acting on the particle is 16N.What is the kinetic energy of the particle
Answer:
208 Joules
Explanation:
The radius of the circular path the charge moves, r = 26 m
The magnetic force acting on the charge particle, F = 16 N
Centripetal force, [tex]F_c[/tex] = m·v²/r
Kinetic energy, K.E. = (1/2)·m·v²
Where;
m = The mass of the charged particle
v = The velocity of the charged particle
r = The radius of the path of the charged particle
Whereby the magnetic force acting on the charge particle = The centripetal force, we have;
F = [tex]F_c[/tex] = m·v²/r = 16 N
(1/2) × r × [tex]F_c[/tex] = (1/2) × r × m·v²/r = (1/2)·m·v² = K.E.
∴ (1/2) × r × [tex]F_c[/tex] = (1/2) × 26 m × 16 N = = (1/2)·m·v² = K.E.
∴ 208 Joules = K.E.
The kinetic energy of an particle moving in the circular path, K.E. = 208 Joules.
If a train starts from rest and after 0.5 hours travels at a speed of 75 km/hr, what is its
acceleration?
Answer:
150 km/hr²
Explanation:
The data for the motion of the train includes;
The train starts from rest, therefore, the initial velocity of the train, u = 0 km/hr
The speed of the train after 0.5 hours, v = 75 km/hr
The change in time during the motion of the train, Δt = 0.5 hours
The acceleration, 'a', is the rate of change of velocity with time;
[tex]a = \dfrac{\Delta v}{\Delta t} = \dfrac{v - u}{\Delta t}[/tex]
Therefore, we have;
a = (75 km/hr - 0 km/hr)/(0.5 hr) = 150 km/hr²
a = 150 km/hr² = 150 km/hr² × 1,000 m/km × hr²/(3,600 s)² = 5/432 m/s²
The acceleration of the train, a = 150 km/hr² = 5/432 m/s².
hiii please help i’ll give brainliest
Answer:
it'll stay the same unless there's rain
im giving 20 points for this, its the 3 time i ask for help please
Atomic Mass = The sum of protons and neutrons in an atom. (Third option).
Atomic Number - The number of protons in an atom. (First option).
Mass Number - Exact amount of protons and neutrons (Last option).
Protons and Electrons - Charged particles of an atom (Fifth Option).
Protons and Neutrons - Particles in the Nucleus of an atom (Fourth option).
Valence Electons - Outermost particles of a shell. (Second Option).
Hope this helped!
When two swimmers are under water in a swimming pool, it is possible for
the interface between the water and the air to act as a mirror, allowing the
swimmers to see images of each other if they look up at the underside of
the surface. Explain this phenomenon.
Answer:
If they are looking at a large enoug h angle of incidence against a relatively calm surface, all the light will be internally reflected, allowing the swimmers to see each other.
Explanation:
find the numerical value of the density of a nucleus of atomic number A
Answer:
(A)²
Explanation:
Atomic mass = density*volume of atom.
So, density of nucleus is in depend of mass number
d=
3
4
πr
3
Massno.
=
3
4
π×[1.3×10
−13
×A
1/3
]
3
A
=constant∗A
0
as R=R
0
A
1/3
(R
0
=1.1×10
−15
m)
The numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.
Density of the nucleus
The density of the nucleus of atomic number A is calculated as follows;
ρ = m/V
where;
m is mass of the atom = 1.66 x 10⁻²⁷ kgr is radius of the atom = 1.2 x 10⁻¹⁵ m[tex]\rho = \frac{m}{V} \\\\\rho = \frac{m}{\frac{4}{3} \pi r^3} \\\\\rho = \frac{1.66 \times 10^{-27}}{\frac{4}{3} \pi (1.2 \times 10^{-15})^3} \\\\\rho = 2.29 \times 10^{17} \ kg/m^3[/tex]
Thus, the numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.
The complete question is below:
find the numerical value of the density of a nucleus of atomic number A with a radius of 1.2 x 10⁻¹⁵ m and mass of 1.66 x 10⁻²⁷ kg.
Learn more about density here: https://brainly.com/question/6838128
#SPJ6
Explain how sound is being produced from this 'Stomp' group.
Answer:
Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium. The human ear detects sound waves when vibrating air particles vibrate small parts within the ear.
In many ways, sound waves are similar to light waves. They both originate from a definite source and can be distributed or scattered using various means. Unlike light, sound waves can only travel through a medium, such as air, glass, or metal. This means there’s no sound in space!
Explanation:
05
Which of these is NOT a definition of power?
A Rate of doing work
Rate of change of velocity
Destanstes ser second
Answer:
Option C. Rate of change of velocity
Explanation:
To know the correct answer to the question, it is important we know the definition of power.
Power can be defined as the rate at which work is done. Mathematically, it is expressed as:
Power = work / time
Work and energy has the same unit of measurement i.e joule. Thus, power can also be defined as the rate at which energy is transferred i.e
Power = enery / time
Energy is measured in Joules and time in second. Thus, power can also be defined as amount of joules transfered per second.
Power = Joule / sec
The rate of change of velocity on the other hand is termed acceleration.
Thus, the answer to the question is option C.
which force affect the aeroplane and ship
Explanation:
the force effect the aeroplane and ship are Gravity and drug
Answer:
The answer is GRAVITY and DRUGS
Explanation:
Hope you have a good day :)
Small light has a resistance of 80 Ω. It is connected to a 9 V battery. How much current is there?
PLEASE HELP ILL MARK BRAINLIEST!!! A ball is initially thrown downwards with an initial speed of 20 m/s from the top of a 300 m tall building. The ball has a constant downward acceleration of 10 m/s ^ 2 a). What is the velocity of the ball immediately before it hits the ground at the base of the building?
Using the 3rd equation of motion:
= v² - u² = 2gs ------ [g = Acceleration due to gravity]
= v² - 20² = 2 × 10 × 300
= v² - 400 = 6000
= v² = 6000 - 400
= v = √5600
= v = 74.83 m/s
And yeah it's done :)