Answer:
Periods are 60 seconds, 60 minutes and 12 hours frequency are their reciprocal.
Explanation:
For second hand, period = 1 min = 3660 s; frequency = 0.0166
For minute hand, period = 1 hr = 3600 s; frequency = 2.77}
For hour hand, period = 12 hrs = 4300 s; frequency = 2.3}
A young child holds a string attached to a balloon. What is the reaction force to the balloon pulling up on the Earth?
Answer:
Gravity pulls the balloon down.
Explanation: PLS BRAINLIEST
25. A wave has a frequency of 46 Hz and a wavelength of 1.7 meters. What is the speed of this wave?
Answer:
78.2 m/time
Explanation:
Wavelength =Speed/Frequency
Speed = 46 x 1.7 =78.2 m/time.
If a specimen was being viewed using a 20x objective lens and 10x ocular lens, what would be the total magnification
Answer:
As Per Given Information
20x objective lens was used by specimen
10x ocular lens was also used by him.
we have to find the total magnification.
For calculating the total magnification we 'll simply do multiplication
Total Magnification = 20x × 10x
Total Magnification = 200x
So , the total magnification will be 200x .
The total magnification is 200 X
What is Magnification of lens ?
Magnification of lens simply means enlarging or diminishing the image of an object form by the lens used.
Given Information in the question :
Magnification of objective lens used by specimen = 20x
Magnification of ocular lens used by him = 10x
Now the total magnification of lens is calculated below :
[tex]\begin{aligned}\text{Total magnification} &= \text{Objective magnification} \times \text{ocular magnification}\\&=20\times \cdot 10\times\\&= 200\times\end{aligned}[/tex]
Therefore, The total magnification is 200 X which means image will appears 200 times larger then the original object.
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18. True or False...Magma approaches the ocean floor at divergent plate boundaries.
Answer:
your answer to your question is true
running back in a football game ran 5 yards north, then ran 6 yards east before being tackled. What distance did he run?
Answer:
11 yards
Explanation:
The player ran 11 yards.
5+6=11
So 11 yards!
Hope dis helps!
-Learning with Natalia~
formula of atmospheric pressure
Answer:
[tex]P_{h}[/tex]=[tex]P_{0} e[/tex][tex]\frac{-mgh}{kT}[/tex]
Explanation:
A cell phone uses a 3. 0 V battery. The circuit board it uses needs a 0. 05 A current. What size resistor is needed to generate this current?.
The value of resistance will be 60 ohms. Resistance is the ratio of the voltage to the electric current passing through the wire.
What is a resistor?A resistor is a two-terminal passive electrical component that acts as a circuit element by implementing electrical resistance.
Resistors are used to limit current flow, alter signal levels, divide voltages, bias active devices, and complete transmission lines in electronic circuits.
The given data in the problem is;
V is the voltage = 3. 0 V
I is value of current= 0. 05 A
R is the resistance=?
According to ohm's law, the potential difference between the two ends of the conductor is equal to the product of electric current and the resistance generated.
So from the ohm law;
V= IR
[tex]\rm R = \frac{V}{I} \\\\ \rm R = \frac{3}{0.05} \\\\ \rm R =60 \ ohm[/tex]
Hence the value of resistance will be 60 ohms.
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What are the two main types of energy?
radiant and chemical
thermal and radiant
potential and chemical
kinetic and potential
Answer:
Fourth option
Explanation:
They're many different types of energy, from chemical and mechanical to heat and solar energy. But the two most basic types of energy are "kinetic and potential energy" or the fourth option. Kinetic energy is the energy an object has when it is in motion, while potential energy is the energy an object has when it's as rest. These two specific types of energies are the most basic and you can even convert them into many different types of energies, like heat or electrical energy.
Hope this helps.
Answer:
D:)
Explanation:
When the rocket launched the astronauts aboard experienced an acceleration of 32 m/s^2. If one of the astronauts had a mass of 65 kg, what net force in newtons did the astronaut experience?
Answer:
The question is somewhat vague in that acceleration is not exactly defined:
Usually a = (v2 - v1) / t which would imply that
a = 32 / g = 32 / 9.8 = 3.27 the acceleration due to change in speed of the rocket
One can also say that the astronaut experiences an acceleration of 9.8 m/s^2 just by being motionless on the surface of the earth.
Then a = (32 - 9.8) / 9.8 = 2.27 due to the acceleration of the rocket
If we assume the first condition then
F = 65 kg * 3.27 * 9.8 m/s^2 = 2083 N
Which factors affect the flow of electric charge? select two options. Voltage ampere ohm resistance volt.
According to Ohm's law: V = IR
The rate of flow of charges will depend on the voltage supplied and the resistance in the wire.
ELECTRIC CHARGE
Current can be defined as the rate of flow of charges. Where charge is the product of current and time. This means that electric charge is proportional to electric current. The current in a conducting wire depends on;
Length of the wireCross sectional area of the wireNature of the wireThe voltage suppliedThe two factors that can affect the flow of electric charge in the given options are voltage and resistance
Because according to Ohm's law: V = IR
The rate of flow of charges will depend on the voltage supplied and the resistance in the wire.
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Answer:
A. and D.
Explanation: Identifying Factors That Affect Current
Which factors affect the flow of electric charge? Select two options.
[voltage]
ampere X
ohmX
[resistance]
volt X
a car slows down from -27.7 m/s to -10.9 m/s while undergoing a displacement of -105m. what was its acceleration
Answer:
3.088 m/s²
Explanation:
Let's see which variables we are given in this problem.
Δx = -105 mv₀ = -27.7 m/sv = -10.9 m/sa = ?The kinematics equation that includes these four variables is:
v² = v₀² + 2aΔxSubstitute the known variables into the equation and solve for a.
(-10.9)² = (-27.7)² + 2a(-105)118.81 = 767.29 - 210a -648.48 = -210a a = 3.088 m/s²The car's acceleration while slowing down from 27.7 m/s to 10.9 m/s in 105 m is 3.088 m/s².
3.
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a
mass of 0.025 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a
collision with puck B, which has a mass of 0.050 kg and is initially at rest. The collision is
not head-on. After the collision the two pucks fly apart with the angles shown in the
drawing. Find the final speed of (a) puck A and (b) puck B. (Cutnell 7.30) 3.4 m/s, 2.6 m/s
+5.50
The final speed of puck A is 1.8 m/s and the final speed of puck B is 3.7 m/s.
Conservation of linear momentum
The final speed of the pucks is determined by applying the principle of conservation of linear momentum.
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
0.025(5.5) + 0.05(0) = 0.025v₁ + 0.05v₂
0.1375 = 0.025v₁ + 0.05v₂
One direction linear velocityu₁ + v₁ = u₂ + v₂
5.5 + v₁ = 0 + v₂
v₁ = v₂ - 5.5
0.1375 = 0.025(v₂ - 5.5) + 0.05v₂
0.1375 = 0.025v₂ - 0.1375 + 0.05v₂
0.275 = 0.075v₂
v₂ = 0.275/0.075
v₂ = 3.7 m/s
v₁ = 3.7 - 5.5
v₁ = -1.8 m/s
Thus, the final speed of puck A is 1.8 m/s and the final speed of puck B is 3.7 m/s.
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The volume of helium in a blimp is 6. 28 × 109 milliliters. The density of helium in the blimp is 0. 1786. Find the mass of the helium in the blimp. (Hint: 1,000 L = 1 cubic meter. ) A. 1,120 kg B. 1. 12 kg C. 3. 52 × 107 kg D. 2,840 kg.
Density is defined as the ratio of the mass per unit volume. Its unit is kg/m³. the mass of the helium in the blimp is 1.22 × 10⁻³ kg.
What is density?Density is defined as the mass per unit volume. It is an important parameter in order to understand the fluid and its properties. Its unit is kg/m³.
The mass and density relation is given as
mass = density × volume
The given data in the problem as ;
v is the volume of gas=-6.28 × 109 ml =6.8452 × 10⁻³ cubic centimeter
ρ is the density = 0.1786 kg/cm³
m is the mass of helium gas =?
The mass and density relation is given as
mass = density × volume
m=ρv
m=0.1786 ×( 6.8452 × 10⁻³)
m=1.22 × 10⁻³ kg
Hence the mass of the helium in the blimp is 1.22 × 10⁻³ kg.
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How does the air pressure on Earth vary from sea level to the top of the atmosphere?
Answer:
Because there is less overlying atmospheric mass as elevation increases, atmospheric pressure decreases as elevation increases.
Think about what happens when you are on an aeroplane. As you descend [going in for landing], atmospheric pressure increases again from when it FIRST started decreasing when you took off. That is the "popping" feeling inside your ears, which requires the chewing of gum.
I hope this sparked a general ideya inside you, and as always, I am joyous to assist anyone at any time.
When two light elements collide to undergo nuclear fusion:_________.
A) the total mass involved increases
B) the positive charges in the nuclei attract, pulling the nuclei together faster and faster
C) some of the energy in their mass is released
D) only one survives; the other turns into a release of pure energy
E) the result is always to make nuclei of iron
Answer: c. some of the energy in their mass is released
Explanation:
While heavier atoms like uranium, thorium, and plutonium are more fissionable, nuclear fusion uses lighter elements like hydrogen and helium, which are often more fusible. Thus, option C is correct.
What light elements collide to undergo nuclear fusion?A heavier nucleus is created when two light nuclei fuse together in a fusion reaction. Because the mass of the resulting single nucleus is smaller than the combined mass of the two initial nuclei, the process produces energy. Remaining mass is converted to energy.
Proton-proton fusion is the particular kind of fusion that takes place inside the Sun. Protons, which are just solitary hydrogen nuclei, are the starting point of this process inside the Sun.
Therefore, After a series of processes, these protons fuse together to form helium.
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This type of bike tire is thinner, lighter, more expensive, and punctures easily.
A. Clinches
B. Tubular
15 POINTS! I will give Brainliest.
Answer:tublar
Explanation:tublar bikes usaly cost 30-40% more
Answer:
Tubular
Explanation:
In terms of puncture resistance, tubular tyres also rank better than clincher tyres which are prone to pinch flats. However, one staple, nail, or piece of glass can be the end of your tubular tyre, whereas a punctured clincher can be reused with a new inner tube. A tubular tyre can also be ridden safely while flat
If the scaled-up man now stands on one leg, what fraction of the tensile strength is the stress on the femur?.
The fraction of the tensile strength which is the stress on the femur is 1.4%.
What is Tensile strength?This is defined as the amount of load or stress that a material can handle before it stretches and breaks.
The femur which is located in the thigh is the largest bone in the body and it exerts a fraction of 1.4% tensile strength through the stress encountered on the femur when the man stands with one leg.
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