Answer:
An element's mass number (A) is the sum of the number of protons and the number of neutrons. ... Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.
Explanation:
Calculate the resistance of an electric blanket that draws 9 A to transform 50 W of energy.
Answer:
The resistance is 0.617Ω.
Explanation:
Given that the formulas are V = I × R and P = I × V so when you substitute the V formula into P formula, you will get P = I² × R. Using this formula, you can find the resistance :
P = I² × R
50 = 9² × R
50 = 81 R
50 ÷ 81 = R
R = 0.617Ω (3sf)
Plis help me !!
1. There are many different renewable resources available in Florida. Which of the following can be described as a renewable resource?
limestone
oil
phosphate
wind
Answer:
Wind
Explanation:
The diagram shows a tennis ball being thrown vertically into the air. When the ball just left the players hand it is at the speed of 5.0 m/s . The tenis ball has the mass of 0.058 kg. Write down the equation that links kinetic energy to mass and speed
Answer:
1. KE = ½mv²
2. The kinetic energy of the tennis ball is 0.725 J
Explanation:
The following data were obtained from the question:
Mass (m) = 0.058 kg
Velocity (v) = 5.0 m/s
Kinetic energy (KE) =.?
1. Defining an expression which relates kinetic energy, mass and speed of an object.
Kinetic energy is simply defined as the energy possess by an object in motion. Mathematically, kinetic energy can be represented as:
KE = ½mv²
Where
KE => is the kinetic energy.
m => is the mass of the object.
v => is the velocity of the object.
2. Determination of the kinetic energy of the tennis ball.
Mass (m) = 0.058 kg
Velocity (v) = 5.0 m/s
Kinetic energy (KE) =.?
KE = ½mv²
KE = ½ × 0.058 × 5²
KE = 0.029 × 25
KE = 0.725 J
Thus, the kinetic energy of the tennis ball is 0.725 J.
Will mark brainiest to the first correct answer!
Why is the sky blue?
✨ Simple answers please ✨
Answer:
Gases and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.
Explanation:
Sorry if it's not that simple ;v;
ThE sKy Is BlUe BeCaUsE yEs.
The tensions in the rope are 12 n and 10 n . What is the angular acceleration of the pulley?
Answer:
[tex]\mathbf{\alpha = 16.06 \ rad/s^2}[/tex]
Explanation:[tex]A \ frictionless \ pulley, \ whic h\ can \ be \ modeled \ as \ a \ 0.83 k g \ solid \ cylinder \ with \ a \ 0.30 \ m \ radius,[/tex] [tex]\ has \ a \ rope \ going \ over \ it[/tex] [tex]The \ tensions \ in \ the \ rope \ are \[/tex] [tex]12 n \ and \ 10 n . \ What \ is \ the \ angular \ acceleration \ of \ the \ pulley?[/tex]
[tex]From \ the \ given \ information:[/tex]
[tex]The \ moment \ of \ inerti a \ of \ a \ solid \ cylinder[/tex] [tex]I = \dfrac{1}{2}mr^2[/tex]
[tex]I = \dfrac{1}{2}(0.83)(0.3)^2[/tex]
[tex]I = 0.03735 \ kg \ m^2[/tex]
[tex]The \ net \ torque = F_1(r) - F_2(r) \\ \\ = 12(0.3) - 10(0.3) \\ \\ = 0.6 \ N.m[/tex]
[tex]Torque (T) = moment \ of \inertia (I) \times angular \ acceleration ( \alpha)[/tex]
[tex]\alpha = \dfrac{T}{I}[/tex]
[tex]\alpha = \dfrac{0.6 \ Nm}{0.03735 \ kg \ m^2}[/tex]
[tex]\mathbf{\alpha = 16.06 \ rad/s^2}[/tex]
A boat travels north at a rate of 25.0 kilometers per hour (km/hr) relative to the current of the river. The current of the river moves south at a rate of 10.0 km/hr relative to the ground. What is the rate of motion of the boat relative to the ground?
Answer:yes
Explanation:yes
Renewable resources need to be conserved because
a) we are using them faster than they are replenished by nature
b)they are slowly disappearing from the Earth
c) if we overuse them nature will stop replacing them
d) all of these
Answer:
(A) We are using them faster than they are replenished by nature
How does an electrical field change when it interacts with an opposing field
Answer:
The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. ... If it is moving in the opposite direction it will decelerate. If a negative charge is moving in the same direction as the electric field vector the particle will decelerate.
Find the acceleration of a 600 kg car that experiences an impulse of 18,000 kgm/s in 0.05 seconds.
I need help with this question, i don’t understand it
Answer:
what?
Explanation:
Answer:
600m/s²
Explanation:
Given parameters:
Mass of car = 600kg
Impulse = 18000kgm/s
Time = 0.05s
Unknown:
Acceleration = ?
Solution:
To solve this problem, let us find the force that cause the impact first;
Impulse = Force x time
Force = [tex]\frac{impulse}{time}[/tex] = [tex]\frac{18000}{0.05}[/tex] = 360000N
So;
Force = mass x acceleration
Acceleration = [tex]\frac{Force }{mass}[/tex] = [tex]\frac{360000}{600}[/tex]
Acceleration = 600m/s²
What is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a
horizontal surface where the coefficient of kinetic friction between it and the surface is 0.10?
4.02 m/sec² is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a horizontal surface.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
force = 50 N - frictional force = ma
50 - 9.8 = ma
a = 40.2/10
a = 4.02 m/sec²
4.02 m/sec² is the acceleration of a 10 kg block that experiences a 50 N applied force as it slides across a horizontal surface.
To learn more about force refer to the link:
brainly.com/question/13191643
#SPJ2
Velocity is speed in a given
• space
• direction
• number
• problem
A car's gas tank contains 58.7 kg
of gasoline, which takes up
0.0814 m^3 of volume. What is
the density of the gasoline?
Answer:
721 kg/m^3
Explanation:
Trust me bro
100 PTs HELP PLS MARKING BRANLIST TAKING TEST RN
John is running 4 m/s when he decides to make a final sprint to the finish line. He crosses the finish line 6 seconds later
running 8 m/s. What was his acceleration in the last 6 seconds of the race?
-1.33 m/s2
1.33 m/s2
0.67 m/s2
-0.67 m/s2
Answer:
Explanation:
uhm answer is 6x8 +6+4 divded by the race seconds
Answer:
0.67m/s2
Explanation:
Two children, totaling 200 kg, are traveling at 10 m/sec in a 100-kg bumper car during an
amusement park ride. They deliberately collide with an empty second car, mass 100 kg, which is
at rest. What is the momentum of the empty car?
Answer:
0kgm/s
Explanation:
The momentum of the empty car is zero.
Momentum is the quantity of motion a body possess. The more the mass and velocity by which a body moves, the higher is its momentum.
Momentum = mass x velocity
Since the second car is at rest, the velocity is 0m/s;
So;
Momentum = 100 x 0 = 0kgm/s
Therefore, a body at rest has zero momentum
A construction crane is on top of a skyscraper which has height 45m. The crane itself is 10m in height. What is the gravitational potential energy in joules of a 60kg worker who is standing on top of the crane? (Use g=9.81 in your calculations)
Answer:
32340J
Explanation:
Given parameters
Height of skyscraper = 45m
Height of crane = 10m
Mass of worker = 60kg
g = 9.81m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is expressed as:
G.P.E = mgh
m is the mass
g is the acceleration due to gravity
h is the height = 45 + 10 = 55m
G.P.E = 60 x 9.8 x 55 = 32340J
Q. A runner has a momentum of 670 kg m/s and is traveling at a
velocity of 9 m/s. What is his mass?
Answer:
m = 74.44 kg
Explanation:
p = m × v
670 = m × 9
9m = 670
m = 670/9
m = 74.44 kg
Momentum of an body is defined as the product of mass and velocity.It s unit is kgm/sec.The value of mass will be 74.44 kg.
What is momentum?The measurement of mass in motion is called momentum. Momentum is equal to its mass multiplied by its velocity. Mathematically it is given as;
Momentum = Mass x Velocity
The given data in the problem will be
p is the momentum of runner=670 kgm/sec.
v is the velocity =9m/sec.
m is the mass =?
[tex]\rm p =mv\\\\\rm m =\frac{p}{v} \\\\\rm m =\frac{670}{9} \\\\\rm m =74.44 kg[/tex]
Hence the value of mass will be 74.44 kg.
To learn more about the momentum refer to the link;
https://brainly.com/question/4956182
Peaks in standing wave are called
Answer:
Antinode
Explanation:
The antinode is a point along the wave that has the greatest maximum velocity in the y-direction.
Someone please help meee
Answer: Your right its ( The pressure of the substance)
Explanation: MArk me as brainlisti
Answer:
The color of the substance.
Explanation:
The color. (I think, it should be right because color shouldn't affect it.)
The Washington monument in our nations capital is 169 m high. What would be the speed of the penny as it hit the ground?
You work at a retail store. Recently, paychecks have had errors and there have been many employee complaints. You have been assigned to head the team to redesign the payroll software program to solve this problem. Use the drop-down menu to organize the steps you will take in writing the problem statement. Write the new payroll software program. Clearly state the vision of how the stakeholders think things will function with the new payroll system. Ask for stakeholder input on the problem and possible solutions?1.C 2.B 3.A
Answer:
C,B,A
Explanation:
Answer:
first one C
second one B
third one A
Explanation:
i hope you have a good day ;0
The melting point of a substance is the same as its _____ point.
evaporation
sublimation
freezing
boiling
Answer:
Boiling point
Explanation:
pls help its about baseball and energy
(one question)
'^'
Can some one please explain how to read this and what the answer would be?
Answer:
4 to 5
Explanation:
which two options are examples of wave refracting?
A. Your image in a mirror
B. Light bending as it travels through glass.
C. A voice echo.
D. An object appearing broken when partly seen through water.
Financial assistance intended to aid students in reaching their educational goals is called
a. benefits
b. financial aid
c. associate's assistance
d. post-secondary education
Please select the best answer from the choices provided
Help plsssss
Answer:
financial aid
Explanation:
edge
what type of triangle measures 8 inches,8 inches,3 inches
Answer:
isoceles
Explanation:
Because two sides are equal
Answer:
An Isosceles triangle
Explanation:
An Isosceles triangle is a triangle where AT LEAST two sides are congruent.
A car is traveling at 35.8 m/s. What acceleration would it have if it took 2.0 s to come to a complete stop?
Answer:
[tex]\boxed {\boxed {\sf a= -17.9 \ m/s^2}}[/tex]
Explanation:
Acceleration is equal to the change in velocity over the change in time.
[tex]a=\frac{v_f-v_i}{t}[/tex]
The initial velocity is 35.8 meters per second. The final velocity is 0 meters per second when the car comes to a complete stop. The time is 2.0 seconds.
[tex]v_f= 0 \ m/s \\v_i= 35.8 \ m/s \\t= 2 \ s[/tex]
Substitute the values into the formula.
[tex]a=\frac{0 \ m/s - 35.8 \ m/s }{2 \ s}[/tex]
Solve the numerator.
[tex]a= \frac{ -35.8 \ m/s} {2 \ s}[/tex]
Divide.
[tex]a= -17.9 \ m/s/s = -17.9 \ m/s^2[/tex]
The car's acceleration is -17.9 meters per square second. The acceleration is negative because the car was coming to a stop and slowing down.
A frictionless pulley system connects a 150 Kg block of a flat surface with a coefficient of friction of 0.20 to a hanging 200 kg block. Determine the tension on the cord, the frictional force of the block on the surface, acceleration of descending block, and time required for a hanging block to full 10 meters.
what is electric lines of force
Answer:
Electric field lines are an excellent way of visualizing electric field. Electrical lines of force can be described as a way or path, it can be straight or curved so that the tangent gives the direction of the intensity of the electric field at that point at any point.
9) Suppose it takes a plane 5 hours to travel from Philadelphia to San Francisco. It
travels at an average speed of 500 miles per hour. What is the distance between
the two cities?
Answer:
2500miles
Explanation:
Given parameters:
Time of travel = 5hrs
Average speed = 500miles/hr
Unknown:
Distance between the two cities = ?
Solution:
To solve this problem, we must understand that speed is the distance covered with time.
So;
Distance = speed x time
Distance = 500 x 5 = 2500miles