Answer: 140
Explanation: just multiply 7 x 20
Distinguish between converging lens and diverging lens
Answer:
Converging lenses are lenses which converge the light rays coming towards them, whereas diverging lenses are lenses which diverge the rays coming towards them.
Converging lenses form a real image, whereas diverging lenses form a virtual image
Explanation:
Three identical blocks, x, y, and z hang from identical strings
Answer:
Following are the solution to this question:
Explanation:
Please find the complete question and its solution in the attached file.
Which was not listed as a hazard of mining.
Answer:
look you didnt put none up there
Pretend you are explain net force to someone much younger than you. Explain how to calculate net force and how the net force determines the object’s motion.
Answer:
you can tell them it is the amount of "push" on an object then you can explain using a soccer ball being kicked or a cart being pushed
Explanation:
Why does the height of the second hill effect the ability of the coaster to go safely around the loop?
Dylan is set to receive a football kickoff. After being kicked, the ball goes up to a height of 55m before starting back down. How much time does he have before the ball comes back down?
Answer:
Explanation:
Answer:
There was no anwser
Explanation:
because dylan did not anwser
A cow pushes down on the ground in a field. What is the reaction force?
Answer:
The ground pushes back.
Explanation:
Determine criteria that NASA may have considered when beginning to design a solution to a problem.
31. What is the mass of a cat that weighs 30.0 N?
(1 Point)
30 kg
300 k
3 kg
OKO
Answer:
3 kg
Explanation:
weight= 9.8x mass
Mass=weight /9.8=30/9.8=3.06kg
I hope it helps
In Claudia’s investigations, she prefers to use DNA evidence whenever she can. Why is this MOST likely to be her preference?
DNA evidence is a reliable evidence that can establish individuality to a person.
No two persons can have similar DNA thus DNA evidence provides identity to a person. DNA evidence can be extracted from biological materials like hair, blood, semen, sweat, bone, tooth pulp, and skin. Therefore, DNA is mostly preferred as evidence.Learn more about DNA:
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a bud travels 20 km in 30 minutes what is the average speed of the bus
What happens to electrical energy that is used by objects in our homes? (1 point) a It is absorbed by batteries. b It is destroyed. c It is stored in solar panels. d It is transformed into other forms of energy.
Question:
What happens to electrical energy that is used by objects in our homes? (1 point)
a It is absorbed by batteries.
b It is destroyed.
c It is stored in solar panels.
d It is transformed into other forms of energy.
Answer:
D
d. It is transformed into other forms of energy.
When electrical energy is used by objects in our homes, it is transformed into other forms of energy depending on the specific device or appliance. For example:
In light bulbs, electrical energy is transformed into light energy and heat energy.In an electric heater, electrical energy is transformed into heat energy to warm the surroundings.In a blender, electrical energy is transformed into mechanical energy to blend food.In a fan, electrical energy is transformed into mechanical energy to create air movement.This transformation of electrical energy into other forms is governed by the principles of conservation of energy, which state that energy cannot be created or destroyed, only converted from one form to another. So, while electrical energy is consumed and "used up" by the devices in our homes, it is not destroyed but rather converted into different forms of energy that serve various purposes.
To learn more about electrical energy, here
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#SPJ2
what is the net force of an object that has 7N to the left and right and 3N up
Answer:
the net force would be 3N in the upward direction since the two forces acting on the left and right of the object cancel out.
Explanation:
Help? anyone? plz?
What was the atmosphere most heated by?
radiation
conduction
wind
convection
Answer:
Explanation:
The answer is radiation.
which of the following equals the change in velocity divided by the time?
A. acceleration
B. Speed
C. momentum
D.displacement
Answer:
Acceleration.
Explanation:
Hope this helped!
if bananas are curved because they grow towards the sun ☀️so say if a was born towards the sun would i have been a curved baby or what
ಠ_ಠ Hey, hang on.. you might've made a discovery. Nobody has tested it so how do we know? ಠ_ಠ
Answer:
It's because of the sun! Bananas are curved so they can retrieve sunlight. Bananas go through a process called 'negative geotropism'. ... So, bananas do not grow directly towards the sun rays but grow upwards to break through the canopy.
An object is in free fall. After 10 seconds calculate the distance fallen?
*
A. 8m
B. 39.24m
C. 9.81m
D. 490.5m
E. 313.92
Answer:
[tex]D.490.5\ m[/tex]
Explanation:
[tex]We\ are\ given\ that,\\Acceleration\ due\ to\ gravity\ (On\ Earth)=9.81\ m/s^2\\Initial\ Velocity\ of\ the\ body=0\ m/s\\Time\ taken=10\ seconds\\Hence,\\From\ the\ Second\ Equation\ of\ Motion:\\S=ut+\frac{1}{2}at^2\\By\ reconstructing\ the\ equation:\\S=ut+ \frac{1}{2}gt^2\\Hence, here\\S=0*10+\frac{1}{2}*9.81*10^2\\S=\frac{1}{2}*981\\S=490.5\ m[/tex]
SOMEONE PLEASE HELP!!
a car is sitting on top of a hill it is 7500 kg the hill is 100m high how much potential energy does the car have
a. 0.01 J
b. 75 J
c. 7,350,000 J
d. 37,500,000 J
Hello!
[tex]\large\boxed{\text{C. 7,350,000 J}}[/tex]
Use the equation:
[tex]PE = mgh[/tex]
Where:
m = mass of the object (kg)
g = acceleration due to gravity (≈9.8 m/s)
h = height above ground (m)
Plug the given values into the equation:
PE = 7500 · 9.8 · 100
PE = 7,350,000 Joules.
Which of the following is an example of Potential Energy?
A Bell Ringing
An apple on a tree branch
Taking X-rays
Lightning
Which term is described as a wave that is not confined to the space along the medium?
tsunami
standing wave
traveling wave
breaking wave
(there will be more Q's about this :\ )
Answer: Traveling wave
Explanation:
In the circuit shown above, the current through the ammeter is 20 mA and the voltmeter indicates 1.0 V. What is the current through the 40 resistor?
A. 7.5mA
B. 10mA
C. 20mA
D. 40mA
Answer:
20mA
Explanation:
because it is connected in series with the ammeter
The current through the 40Ω resistor in the given circuit is 20mA, which is explained below.
Current through the resistors:The volate across resistor R is 1V, as indicated by the voltmeter.
Since the potential of the battery is 3V, according to Kirchoff's voltage law, the voltage drop across 20Ω resistors must be 1V each since they are indentical.
Let a total current I passes through 20Ω resistor as it is connected to the battery in series. From Ohm's law:
20Ω × I = 1V
I = 50mA
Now the current indicated by the ammeter is 20mA which splits according to the reistors of 15Ω and 30Ω which are connected in parallel. Then again the current adds up to 20mA when leaving the set of parallel resistors, through the 40Ω resistor.
So the current through the 40Ω resistor is 20mA
Learn more about Kirchoff's voltage law:
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difference between of echo and reverberation
Answer:
A difference between of echo and reverberation is described below in details.
Explanation:
Here's a piece of immediate information: An echo is an individual consideration of a soundwave off a horizon exterior. Reverberation is the consideration of sound waves generated by the superposition of the before-mentioned echoes. ... A reverberation can happen when a sound wave is displayed off a nearby covering.
a track player swings a 1.5 kg discus around at an arm's length of .8 m. if the discus is traveling at 3.0 m/s, what is its angular momentum?
Answer:
3.6 kg*m^2/s
Explanation:
The angular momentum equals mvr, where m is the mass, v is the velocity, and r is the radius or rotational arm. Inputting these values, we can find the angular momentum.
Angular momentum = (1.5 kg)(3.0 m/s)(0.8 m) = 3.6 kg*m^2/s
I hope this helps! :)
Answer:
3.6 kg is the answer
Explanation:
becuase 8/3 = 3.6
A golfer strikes a golf ball with an initial velocity of 50 m/s at an angle of 35° to the horizon.
Calculate initial. X velocity
Calculate initial. Y velocity
Answer:
for X, it's 50 times cos 35.
for y, it's 50 times sin 35.
A dolphin swims 1.85km/hr. How far has the dolphin traveled after 0.6hr?
Part of a bird's digestive tract, called a gizzard, is able to break up large chunks of food at an extremely fast rate. It is difficult for
scientists to watch a gizzard functioning in a live bird. How would building a model of a gizzard help a scientist?
A. to analyze how a gizzard works
В.to study bird behavior
C.to determine what type of tissues a real gizzard is made of
D.to watch a gizzard functioning in life
Answer:A:
To analyze how a gizzard works.
Explanation:
Please help ASAP I have to turn this in soon
Answer:
See in explanation
Explanation:
Scientific use: The Einstein's THEORY of relativity states that "Time Is Absolute".
Everyday use: Einstein's LAW of relativity says that time is not the same at all places and events.
Answer:
Almost every scientist has a theory about the things that they discover and if the things are un-explainable it is a scientific law.
The goverment has laws to keep people safe and important people have important theories if they are not there.
Explanation:
I hope this helps!
A force of 10N is making an angle of 300 with the horizontal. Its horizontal components will be
Answer: 5N
Explanation:
Horizontal component is the force that is applied as a result of the diagonal application of force.
here in this case,
given diagonal force =10N.
angle= 30°
horizontal component is found using trigonometry..
so,
A vector of magnitude 10 N is provided.
It is at an angle of 30° to the + x axis.
To find:
The components along the x and y axis.
Calculation:
Along x axis:
F(x) = F cos(θ)
=> F(x) = 10 × cos(30)
=> F(x) = 10 (√3/2) = 5√3N
Along y axis:
F(y) = F sin(θ)
=> F(y) = 10 sin(30°)
=> F(y) = 10 × ½
=> F(y) = 5 N.
Additional information:
1. A vector is a quantity that can be defined with both magnitude and direction.
2. Since force is a vector, we are able to break it down into components along chosen axis.
What is one watt ? Write the relation of watt with kilowatt , megawatt , and horsepower .
Answer:
See the explanation below
Explanation:
The watt (the power) is equal to the relationship between the work and the time in which that work is performed.
[tex]P = W/t[/tex]
where:
W = work [J] (units of Joules)
t = time [s].
Now 1000 [W] are equal to 1 [kW]
And 1000000 [W] are equal to 1 [MW]
The horsepower is the unit of power in the imperial system of units.
And 745.7 [W] are equal to 1 [Hp]
1. A 146 kg cubic tiger began with an initial velocity of -22 m/s [N] and, while moving away from the origin, accelerated at -0.43 m/s² [N] and moved -407 m [N]. What was the final velocity of the tiger?
Answer:
v = 28.87 m/s
Explanation:
Given that,
Mass of a cubic tiger, m = 146 kg
Initial velocity, u = -22 m/s
Acceleration, a = -0.43 m/s²
Distance moved, s = -407 m
We need to find the final velocity of the tiger. Using third equation of motion to find it. Let v is the final velocity of the tiger.
[tex]v^2-u^2=2as\\\\v^2=(-22)^2+2\times (-0.43)\times (-407)\\\\=28.87\ m/s[/tex]
So, the final velocity of the tiger is 28.87 m/s.
