Answer: YES
Explanation: The main difference between flood and tsunami is that the flood is overflow of water that submerges land and tsunami is a series of water waves caused by the displacement by large volume of a volume of water
Answer:
WEEEEEEEEEEEEEEEEEEEEEEEEE
Explanation:
You are at the top of the Empire State Building on the 102nd floor, which is located 373 mm above the ground, when your favorite superhero flies over the building parallel to the ground at 70.0 %% the speed of light. Part A You have never seen your favorite superhero in real life. Out of curiosity you calculate her height to be 1.57 mm . If the superhero landed next to you, how tall would she be when standing
Answer:
L₀ = 0.0022 m = 2.2 mm
Explanation:
Here, we will use the length contraction formula from the theory of relativity presented by Einstein:
[tex]L = L_o\sqrt{1-\frac{v^2}{c^2}}[/tex]
where,
L = Relative length = 1.57 mm = 0.00157 m
L₀ = actual length at rest = ?
c = speed of light
v = relative speed = 70% of c = 0.7 c
Therefore,
[tex]0.00157\ m = L_o\sqrt{1-\frac{(0.7\ c)^2}{c^2} }\\\\L_o = \frac{0.00157\ m}{\sqrt{1-0.49}}[/tex]
L₀ = 0.0022 m = 2.2 mm
why is it important to know about plate tectonics?
Answer:
plate tectonics provides an explanation of how earthquakes, mountains, and oceans are formed . A good theory provides explanations of why things happen. Also the a good theory provides predictions based on the explanations. Plate tectonics explains why and where earthquakes occur. This makes it possible to make predictions about earthquakes.
Perhaps the greatest of the Greek astronomers, Hipparchus compiled the first catalog of stars, 49) accurately measured their positions, and defined the basic system of stellar brightnesses which we now call the magnitude system. A particular star in his catalogue has an apparent magnitude of 4 and an absolute -12. Determine the distance to the star.
Answer:
Explanation:
it would be 3 because ju divide 12 by 4
A horizontal spring attached to a wall has a force constant of 850 N/m. A block of mass 1.00 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in Active Figure 5.20. The initial goal of this problem is to find the velocity at the equilibrium point after the block is released. (a) What objects constitute the system, and through what forces do they interact? (b) What are the two points of interest? (c) Find the energy stored in the spring when the mass is stretched 6.00 cm from equilibrium and again when the mass passes through equilibrium after being released from rest. (d) Write the conservation of energy equation for this situation and solve it for the speed of the mass as it passes equilibrium. Substitute to obtain a numerical value. (e) What is the speed at the halfway point? Why isn’t it half the speed at equilibrium
Answer and Explanation:
(a)The system consists of the spring the block + Earth.
They interact through some forces which are: Gravitational form + normal
forces + spring force.
(b)The two points are:
When the spring has compressed a distance of
When the spring is no longer compressed.
(c)1.53[tex]J[/tex]
0[tex]J[/tex]
d. 1.75[tex]m/s[/tex]
(e)1.51 [tex]m/s[/tex]
The function of the final velocity is Not a linear one.
The mass energy equivalence shows that conservation of mass is a
restatement of —
A. the first law of thermodynamics.
B
Charles' Law.
C
Kirchoff's Law.
D
Newton's Second Law
Answer:
C
Explanation:
Answer:
the first law of thermodynamics.
Explanation:
What happens to the force between two magnets as the magnets come closer together? *
Explanation:
So if two magnets are pointing with unlike-poles together (north pole to a south pole), then bringing them closer together decreases the energy stored up in the magnetic field. They will be pushed in the direction that decreases the amount of stored-up energy.
Explanation:
depending on the polarity they'll increasingly repel or attract
Positive electric charges are always attracted to ________ charges.
Answer:
Negative electric charges
A block is given an initial velocity of 3.00 m/s up a frictionless incline of angle 20 degrees. How far up the incline does the block slide
Answer:
The distance moved by the block is 1.34 m
Explanation:
Given;
initial velocity of the block, u = 3 m/s
angle of inclination, θ = 20⁰
The net horizontal force acting on the block;
∑Fx = - mgsinθ
Apply Newton's second law of motion, to determine the constant acceleration of the block.
∑Fx = ma
- mgsinθ = ma
-gsinθ = a
Apply the following Kinematic equation, to determine how far up, the block moved before coming to rest.
[tex]V_f^2 = V_i^2 + 2a(x_f -x_i)\\\\0 = V_i^2 + 2[-gsin \theta(x_f-0)]\\\\0 = V_i^2 - 2gsin \theta(x_f)\\\\ 2gsin \theta(x_f) = V_i^2\\\\x_f = \frac{V_i^2}{2gsin \theta} = \frac{(3)^2}{2 \ \times \ 9.8 \ \times \ sin(20)} = 1.34 \ m[/tex]
Therefore, the distance moved by the block is 1.34 m
please help me with this question
Answer:
Answer is option d
Explanation:
,Mark as brainlist
What is the resistance of a circuit with a current of 48 amps and a voltage of 12 volts?
a: 0.25 ohms
b: 60 ohms
c: 4 ohms
d: 576 ohms
Answer:
a: 0.25 ohms
Explanation:
The resistance of the circuit can be calculated by using Ohm's Law:
[tex]V = IR\\\\R = \frac{V}{I}[/tex]
where,
R = Resistance of the circuit = ?
V = Voltage = 12 volts
I = Current = 48 A
Therefore,
[tex]R = \frac{12\ V}{48\ A} \\\\R = 0.25\ ohms[/tex]
Hence, the correct option is:
a: 0.25 ohms
7
Mr. Robbins is taking his baby for a walk in a stroller. The amount of force that Mr. Robbins must use
to make the stroller move MOST likely depends on the stroller's -
A direction
B
distance
C velocity
D
mass
Two objects of the same radius start from rest and roll without slipping down a ramp. The objects are a hollow cylinder and a solid cylinder. Which one of them reaches the bottom of the ramp first?
Answer:
Solid cylinder
Explanation:
because hollow may blow and just bounce
Is a body which is moving in a negative direction but has a positive acceleration speeding up or slowing down?
Answer:
An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down.
Explanation:
hope this helps
have a great day/night
Select the correct answer.
A car moves with an average speed of 45 miles/hour. How long does the car take to travel 90 miles?
OA.
2 minutes
OB.
2 hours
O c.
45 minutes
OD.
45 hours
O E.
90 minutes
Reset
Next
Answer:
B. 2 hours
Explanation:
45 miles an hour times 2 is 90 miles in 2 hours
Answer:
B. 2 Hours
Explanation:
If your going at a constant speed of 45 miles per hour then, it will take two hours because 45x2 is 90. and if you divided 90 and 45, you will get 2.
Describe one way you can increase the strength of an electromagnet.
Answer:
(1) By increasing the number of loops of wire around the iron core
(2) increasing the current or voltage.
two spheres of radii 5cm and 3cm are given charges on risk volume and 50 calling respectively and then connected by a wire calculate the loss of energy after connection
Answer:
Solution given:
Radius of small sphere[r]=5cm=0.05m
Radius of large sphere[R]=10cm=0.1m
capacitance of small sphere[c]=4πε0r
=[tex]4π*8.85×10^{-12}×0.05=5.56*10^{-12}F[/tex]
Charge for small sphere[Q1]=100C
Charge for small sphere[Q2]=50C
Potential difference [V1]=[tex] \frac{charge}{capacitance}=\frac{100}{5.56*10^{-12}}=1.8×10^{13}[/tex]V
.
again
capacitance of small sphere[C]=4πε0R
=[tex]4π*8.85×10^{-12}×0.1=1.11*10^{-11}F[/tex]
Potential difference [V2]=[tex] \frac{charge}{capacitance}=\frac{50}{1.11*10^{-11}}=4.5×10^{12}[/tex]V
Now
Loss of energy:
[tex] \frac{cC(V1-V2)^{2}}{2(c+C)}[/tex]
=[tex] \frac{5.56*10^{-12}*1.11*10^{-11}(1.8*10^{13}-4.5*10^{12})^{2}}{2(5.56*10^{-12}+1.11*10^{-11})}[/tex]
=25Joule
que estudia la estática?
Calculate (a) the torque, (b) the energy, and (c) the average power required to accelerate Earth in 4.0 days from rest to its present angular speed about its axis. Take the rotational inertia of Earth to be 9.71 x 10 37 kg m2. (Note: let one day be 24 hours)
Torque = 2.05 x 10²⁸ Nm
Energy = 3.54 x 10³³ J
Average power = 1.02 x 10²⁸ W
Explanation:(a) Torque (τ) is the rotational effect of a given force.
It is given by
τ = I x α -------------(i)
Where;
I = rotational inertia of the object
α = angular acceleration of the object.
In this case, the object is the Earth. Therefore,
I = 9.71 x 10³⁷ kg m²
α = ω / t
Where;
ω = angular velocity of earth = 2π rad / day
Since
1 day = 24 hours and 1 hour = 3600seconds
1 day = 24 x 3600 seconds = 86400seconds
=> ω = 2π rad / 86400seconds
=> ω = 7.29 × 10⁻⁵ rad/s
t = 4 days = 4 x 24 x 3600 seconds = 345600 seconds
=> α = ω / t
=> α = 7.29 × 10⁻⁵ / 345600
=> α = (7.29 × 10⁻⁵) / (3.456 x 10⁵)
=> α = (7.29 × 10⁻⁵⁻⁵) / (3.456)
=> α = (7.29 × 10⁻¹⁰) / (3.456)
=> α = 2.11 × 10⁻¹⁰ rad/s²
Now substitute the values of I and α into equation (i)
τ = 9.71 x 10³⁷ x 2.11 × 10⁻¹⁰
τ = 9.71 x 10²⁷ x 2.11
τ = 20.5 x 10²⁷ Nm
τ = 2.05 x 10²⁸ Nm
(ii) The energy (rotational energy) E is given by;
E = [tex]\frac{1}{2}[/tex] x I x ω
E = [tex]\frac{1}{2}[/tex] x 9.71 x 10³⁷ x 7.29 × 10⁻⁵
E = 35.4 x 10³² J
E = 3.54 x 10³³ J
(iii) The average power P, is given by;
P = E / t
P = 3.54 x 10³³ / 345600
P = 1.02 x 10²⁸ W
A teacher sets up the following demonstration in which he places a clear glass rod with an index of refraction of 1.47 into a beaker containing an unknown liquid. When he does this, the submerged portion of the glass rod seems to disappear. The teacher gives the students the following list of possible liquids in which this glass rod has been submerged.
Material Index of Refraction
Salt Water 1.37
Glycerin 1.47
Silicon Oil 1.52
Required:
Which material is most likely to represent the liquid in the beaker and why?
Answer:
salt water
total internal reflection
Explanation:
Let's analyze this experiment, for the rod to disappear it must have happened that the light coming from it does not reach us that we are seeing from the air n = 1, therefore the light from the rod must be reflected, for this to happen we use the refractive ratio
n₁ sin θ₁ = n₂ sin θ₂
where n₁ is the refractive index of the rod, the greatest angle that could exist in the liquid is 90º, therefore sin 90 = 1
n₁ sin θ₁ = n₂
sin θ₁ = n₂ /n₁
the only way this expression is correct is that
n₂ <n₁
that is
n₂ < 1.47
When reviewing the given materials, the only one that meets this condition is salt water by the total internal reflection
Which of the following has the least resistance?
wood
iron
copper
silver
Answer:
Copper
Explanation:
Copper is the least resistant because it is the best conductor of electricity in the options mentioned.
80 POINTSSS
The picture above represents what kind of circuit?
open series circuit
open parallel circuit
closed series circuit
closed parallel circuit
Answer:
closed parallel circuit
Two velocity vectors are added: one of magnitude 2.0 m/s and one of magnitude 4.0 m/s. Not knowing the respective directions, we can say that the magnitude of the sum of the vectors will be
Answer:
4.47
Explanation:
Given data
vector 1 = 2m/s
vector 2= 4 m/s
The expression for the magnitude of two vectors is
|a| = √v1^2+ v2^2
substitute
|a| = √2^2+ 4^2
|a| = √4+ 16
|a| = √20
|a| = 4.47
Hence the magnitude of the two vectors is 4.47
True or false energy must be added to the gas element in order for light to be emitted .
A. True
B. False
Answer:
b is the answer of this qs
What gift is given from one generation to the next
Answer:
awareness and honesty toward others
PLEASE HELP ME WITH THIS ONE QUESTION
A small resistor is connected to a 12 V battery. A second resistor of REALLY high resistance is added to the series circuit. How does this affect the current?
A) Nothing changes.
B) The current of the entire circuit is lowered.
C) The current through the large resistor is lowered.
D) The current through the small resistor is lowered.
Answer:
B) The current of the entire circuit is lowered.
Explanation:
There are two ways in which a resistor can be connected in a circuit;
i) Series: In a series connection, resistors are connected end to end. In this arrangement, the current passing through each resistor is the same while the potential difference across each resistor is different.
ii) Parallel: In a parallel connection, resistors are connected to common junctions. In this arrangement, the potential difference across each resistor is the same while the current across each resistor varies.
In a series circuit, the effective resistance is the algebraic sum of resistance of all the resistors connected in series. Hence, if a large resistor is connected in series, the effective resistance of the circuit is greatly increased.
Since the voltage is given by;
V=IR (Ohm's law)
Where R is the effective resistance
Then;
I = V/R
If R becomes very large due to a large resistance connected in series, then the current of the entire circuit is lowered.
Gold-198 is a radioactive isotope, and it has a half-life of about 2.5 days.
You have 100 grams of Gold-198. How many grams remain after 20 days?
3.125 grams
1.5625 grams
0.78125 grams
0.390625 grams
Answer: 0.390625 grams
Explanation:
A half-life of an element is the amount of time that it takes for half the mass of the element to decay.
Gold-198 having a half-life of 2.5 days therefore means that every 2.5 days, the mass is cut in half.
If there are 20 days, find out how many half-life periods there are:
= 20 / 2.5
= 8 periods
The half life is:
= Original mass * 0.5^number of half-life periods
= 100 * 0.5⁸
= 0.390625 grams
wHICH WAVES MOVE BY REPLACING ONE PARTICLE WITH ANOTHER?
A. LIGHT WAVES
B. SOUND WAVES
C. ELECTROSTATIC WAVES
D. ELECTROMAGNETIC WAVES
AGAIN IF ANYONE I KNOW SEES THIS IGNORE BC IM FINNA JUMP OFF A CLIFF
Answer:
I think it's B. Sound Waves
Wha is the definition of health?
Which of the following least represents an negative impact on Earth caused mostly by humans?
A) Deforestation
B) Urbanization
C) Erosion
D) Recycling
Answer:
D
Explanation:
Our Most Plentiful Resources
Which two renewable technologies do not
rely on energy from the Sun?
wind and hydroelectric
