Answer:
q=IR
Explanation:
q is voltage
I is current
R is resistance
a student uses a spring to launch a marble vertically in the air. The mass of the marble is
0.02 kg and when the spring is stretched 0.08 m it exerts a force of 58 N. What is
the maximum height the marble can reach?
Answer:
the maximum height reached by the marble is 11.84 m.
Explanation:
Given;
mass of the marble, m = 0.02 kg
extension of the string, x = 0.08 m
force applied to the string, F = 58 N
Apply the principle of conservation of energy;
elastic potential energy = gravitational potential energy
¹/₂fx = mgh
[tex]h = \frac{Fx}{2mg} \\\\h = \frac{58 \ \times \ 0.08}{2 \ \times \ 0.02 \ \times \ 9.8} \\\\h = 11.84 \ m[/tex]
Therefore, the maximum height reached by the marble is 11.84 m.
Please i need the answer ASAP!!!!
Select the correct answer.
Which statement is true according to the kinetic theory?
A.
Only gases show random motion of particles.
B.
Only gases and liquids show random motion of particles.
C.
Solids have a fixed shape, so they do not show random motion of particles.
D.
All states of matter show random motion of particles.
Answer:
C
Explanation:
Solids particles do not move, only vibratre
2 mi. ki khni
mene to bhot sari khni likhi he socha ek aap ke liye
Answer:
yah kaya ha pagal ............^,^
The bike you are riding hit a pothole in the street and stops quickly but you fly forward over the handlebars. What law of motion is this?
Answer: 1 st law of motion
Explanation:
Given
The bike hits the pothole and the driver flies over the handlebar. This can be explained by Newton's first law of motion. This law states that a body in the state of rest or motion will remain in that state unless an external force is applied to it.
Here, the bike instantly comes to rest by contacting the pothole which is at rest. while the driver body continues to move in forward direction and as a result it flies over the handlebars.
Hii!!!
So are like properties of matter different from physical properties?
Because I’m doing an assignment and I’m not so sure!
Answer:
no
Explanation:
because The properties of matter include any traits that can be measured,
Physical properties can be observed or measured.
A 5V battery is connected to a resistor, 2A of current flows through the resistor. What is the resistance in Ohms
Answer:
V=IR
5. = 2× RESISTANCE
RESISTANCE=5/2
=2.5 Ohms
A substance a
wave travels through
is called a(n)
A. Solution
B. Medium
C. Matter
D. Element
B.
C
U
Gas
Answer:
B. Medium
Explanation:
I don't know how to explain it but I already did this lesson in school
If I have an unknown quantity of gas at a pressure of 8.5 atm, a volume of
11.6 liters, and a temperature of 43 °C, how many moles of gas do I have?
Answer:
3.802 moles
Explanation:
P = 8.5 atm
V = 11.6 liters
R = 0.08206
T = 316 K (273 + 43)
PV = nRT
(8.5)(11.6) = n(0.08206)(316)
---> n = 3.802 moles
for every 120 joules of energy input a car waste 85 joules, find the useful energy output of the car?
Answer:
Useful Output = 35 J
Explanation:
The useful energy output of the car must be equal to the difference between the total input energy supplied to the car and the energy wasted by the car:
Useful Output = Total Input - Waste
where,
Total Input = 120 J
Waste = 85 J
Therefore,
Useful Output = 120 J - 85 J
Useful Output = 35 J
whoever guesses this will have a new frend
Answer:
B
Explanation:
Endothermic reactionIn an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings by the reaction.
Materials that let light pass through them?
Answer:
Materials that allow most all light to pass through them are called transparent. Examples of transparent items are glass, water, and air. Those materials that allow some light to pass through them are called translucent and include things like frosted glass and wax paper.
Answer:
They are transparent
Explanation:
Because they simple allow light to pass though instead of obstructing it
A force transmitted through a string or rope is called what
Answer:
Tension force
Explanation:
Have a good day :)
Answer:
The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends.
HELP ME PLEASE 20 POINTS
Which statement applies only to magnetic force instead of both electric and
magnetic forces?
A. It can push objects apart.
B. It acts between objects that do not touch.
C. It can pull objects together.
D. It acts between a north pole and a south pole.
The answer is C. I searched it up and people keep on saying that it's B, which is incorrect. I found another question on Brainly where someone said that C was the answer and the person who asked the question said "Correct, thanks."
Kevin bikes to the pizza place for lunch. He rides 1 km east, 3 km north, 4 km west, and finally 3 km south. What was his displacement?
Answer:
3kmExplanation:
To get the displacement, we will make use of the expression;
[tex]D = \sqrt{(\sum d_x)^2+(\sum d_y)^2}[/tex]
Taking the sum of the distances along the x;
dx = 1km - 4km
dx = -3km
Taking the sum of the distances along the y axis
dy = 3km - 3km
dy = 0km
Substitute into the formula above;
[tex]R = \sqrt{(-3)^2+(0)^2}\\R = \sqrt{9} \\R = 3km\\[/tex]
Hence his displacement is 3km
HELP PLS
In the context of climate change, is “positive feedback” a good thing?
The graph represents the reaction 3H2 + N2 2NH3 as it reaches equilibrium. Based on the graph, which two statements about this reaction are true?
PLEASE NO LINKS OR DOWNLOADS
Answer:A and C
Explanation: I took the test lol
Two statement that are correct based on graph are A, At point 4, the concentration of NH₄, NH₂ and H₂ remain constant, and C, Equilibrium is reached after point 3.
What are graphs?Graphs are the mathematical representation of the data that is easy to understand.
The reaction is [tex]\rm 3H_2 + N_2= 2NH_3[/tex]
The graph shows time on x-axis and concentration on y-axis.
Thus, the correct options are A and C.
Learn more about graphs
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What's the role of a meteorologist in full detail
Answer:
you'll predict the weather and study the causes of particular weather conditions using information obtained from the land, sea and upper atmosphere. You'll also make short and long-range forecasts concerning weather and climate patterns.
An upright object 2.80 cm tall is placed 16.0 cm away from the vertex of a concave mirror with a center of curvature of 24.0 cm. What is the focal length of this mirror?
Answer:
f = 12 cm
Explanation:
Center of Curvature:
The center of that hollow sphere, whose part is the spherical mirror, is known as the ‘Center of Curvature’ of mirror.
The Radius of Curvature:
The radius of that hollow sphere, whose part is the spherical mirror, is known as the ‘Radius of Curvature’ of mirror. It is the distance from pole to the center of curvature.
Focal Length:
The distance between principal focus and pole is called ‘Focal Length’. It is denoted by ‘F’.
The focal length of the spherical (concave) mirror is approximately equal to half of the radius of curvature:
[tex]f = \frac{R}{2}[/tex]
where,
f = focal length = ?
R = Radius of curvature = 24 cm
Therefore,
[tex]f = \frac{24\ cm}{2}[/tex]
f = 12 cm
Science
plz help
will give brainlist
Which equations are equivalent to 3/4+m=-7/4? Select three options.
M= 10/4
M=-10/4
M=-5/2
11/4+m=-1/4
-5/4+m=-15/4
Answer:
M= -10/4
M = -5/2
-5/4 + m = -15/4
Explanation:
3/4 + m = -7/4
Subtract 3/4 from both sides
3/4 + m - 3/4 = -7/4 - 3/4
m = (-7-3) / 4
m = -10/4
m = -5/2
Check the options
11/4 + m = -1/4
m = -1/4 - 11/4
m = (-1-11) /4
m = -12/4
m = -3
-5/4 + m = -15/4
m = -15/4 + 5/4
m = (-15+5) /4
m = -10/4
m = -5/2
Which characteristics of an area could best identify the type of biome it is
Answer: average annual rainfall, average annual temperatures, types of plants and animals native to the area
Explanation: the best way you can identify a biome is by telling which animal or species are native to the certain area
A wave is incident on the surface of a mirror at an angle of 41° with the normal. What can you say about its angle of reflection?
Answer:
From Law of Reflection...
"Angle of Incidence equals angle of reflection"
The angle of reflection is also 41°
Explanation:
A 10kg box accelerates forward at a rate of 12 m/s^2. What is the force acting on the box?
120N
N8'0
ON
Answer:
120N
Explanation:
Newton's second law formula: F= ma
given that m = 10 kg, a = 12 m/s^2
F = ma = 10 kg * 12 m/s^2 = 120 kgm/s^2 = 120 N
The force acting on the box is equal to 120N. Therefore, option (A) is correct.
What is Newton's second law of motion?According to Newton's 2nd law of motion, The force acting on an object is equal to mass times the acceleration of that object.
This law tells that the acceleration of a moving body depends upon two variables in which one is the mass of the object which is constant while the other is the force acting on that object. The acceleration of an object increases as the mass of the object is less.
The mathematical equation of the second law of motion can be written as:
F = ma
Given, the mass of the box, m = 10 Kg
The acceleration of the box, a = 12m/s²
We can find the force acting on the box by putting the values a and m:
Force acting on the box, F = 10 ×12 = 120 N
Therefore, the force acting on the box is equal to 120 newtons.
Learn more about Newton's 2nd law of motion, here:
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Which class of lever has mechanical advantage less than one?
. first class lever
. second class lever
. third class lever
Answer:
first class lever
Explanation:
Explanation:
first class leverhope it is helpful to you
The SI units for force are what?
Answer:
The SI unit of force is Newton.
Explanation:
Newton is denoted by N.
Force can be defined as the pull or push which change or try to change the state of a body from motion to rest or rest to motion in a straight line.
What is the current in a 110V circuit with resistance is 10Ω?
Answer:
using V= IR
I= 11Ampere
A 6,600 kg train car moving at +2.0 m/s bumps into and locks together with one of mass 5,400 kg moving at −3.0 m/s . What is their final velocity?
−1.0 m/s
−0.25 m/s
+0.50 m/s
+2.5 m/s
Answer:
option B is the correct option
Explanation:
According to momentum conversion,
momentum of one car= 6600×2=13,200kgm/s
momentum of another car=5,400×(-3)=16,200kgm/s
Then,
Momentum of second car-momentum of first car
=16,200-13200
=3000kgm/s
mass of first car -mass of second car
=6600-5400
=600kg
final velocity=3000/600=2.5 m/s
nonmetals and metals do different things when it comes to their valence electrons. one seeks to gain and the other lose. which is which?
Answer:
Nonmetals gain
while metals lose
explain how the gravitational potential energy of an object can be changed.
Answer:
Change in Potential energy, pe = Final potential energy - Initial potential energy
Explanation:
∆p.e = Final p.e - Initial p.e
From the equation ∆p.e = (mgh) final - (mgh) initial
How are light waves produced
Answer:
Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave
Explanation:
Answer:
Electromagnetic waves are created by oscillating charges (which radiate whenever accelerated) and have the same frequency as the oscillation. Since the electric and magnetic fields in most electromagnetic waves are perpendicular to the direction in which the wave moves, it is ordinarily a transverse wave
Explanation:
