78 percent nitrogen and 21 percent oxygen
Why is it important to assess flexibility both before and during a workout regimen? a. to assess flexibility progress b. to keep muscles warm c. to establish flexibility baselines d. none of the above please select the best answer from the choices provided. a b c d
It important to assess flexibility both before and during a workout regimen because to assess flexibility progress.
What is a flexibility exercise?Flexibility exercises, as the name implies, help to increase the stretch of the muscles, improving the range of motion. More flexibility is also important to help prevent possible post-workout soreness.
In this case we have that the reason to continue doing stretching before and during the exercises is about to assess flexibility progress.
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Answer:
A
Explanation:
Determine the work done to raise a mass of 8.0 kg through a height of 2.5 m on this planet.
Answer:
196 J
Explanation:
Formula
Work done(W) = Mass (m) x gravity (g) x height (h)Here, we are given :
m = 8.0 kgg = 9.8 m/s² (on Earth)h = 2.5 mSolving
W = 8 × 9.8 x 2.5W = 20 × 9.8W = 196 JA soccer ball and bowling ball, with the same areas and different masses, are dropped at the same time. How will their motions compare
O The bowling ball will fall faster due to its mass.
O The bowling ball will fall at a slower speed because its mass means it will have more air resistance.
O
The soccer ball will fall slower because it will be affected by air resistance.
O The objects will fall at the same speed because the effect of gravity on them is the same.
Answer:
Third option
Explanation:
IF you ignore air resistance, they will fall at the same rate due to the effect of gravity being the same on both ....BUT the third option seems to be correct as air friction is taken into account.... the bowling ball will be affected by air resistance too, bul less so..
Identify which portions of the electromagnetic spectrum are used in each of the devices listed. a. a microwave oven b. a television set c. a single-lens reflex camera
The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.
What is the electromagnetic spectrum ?The electromagnetic radiation distribution in accordance with the frequency or wavelength is known as the electromagnetic spectrum.
The portions of the electromagnetic spectrum are used in the television set. It is used in the picture tube in the old television set.
Hence, option b is correct.
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Hip hop dance translate feelings and emotions of human conditions, situations, or fantasies into movement and dramatic expressions? True or false?
Answer:
false .....................
Ben created the table below to identify the roles of
different parts of the eye.
Part
Role
Cones
provide color visions through three
types of cells
Lens
focuses light to form an
upside-down, virtual image
Iris
adjusts the size of the pupil to
control the amount of light
receives image of the object and
contains cells that detect light
Retina
Which describes Ben's error?
There is a single type of cone cell.
The lens forms a real image.
The iris is a hole through which light passes.
The retina carries the signals to the brain.
Answer:
the answer is The lens forms a real image.
Explanation:
got it right on edge
find the resistance of a multiplier connected with milliammeter of resistance 10 ohms with a deflection of 10 milliamperes and the voltage of the circuit is 15 volts
define scientific measurement
Answer:
Measurements are a basic necessity in science. Scientists have designed thousands of different tools to help in the vital process of measuring. In this image of the control panel of the space shuttle Atlantis, we see dozens of readouts from measuring systems.
When boarding an airplane you bring a bag of chips. While in flight the bag puffs up, because suction is occurring. air pressure is affected by the Bernoulli principle. air pressure in the air-tight bag is greater than cabin air pressure. all the above none of the above
Answer:
air pressure in the air-tight bag is greater than cabin air pressure
Explanation:
a 55kg skater is speeding towards a ramp. if the skater reaches a height of 0.8m before coming to a stop, how fast was the skater going in the beginning? ignore any friction.
Answer:
3.96 meters / sec
Explanation:
The skaters Kinetic Energy is converted to Potential Energy ( ignoring friction)
KE = PE
1/2 * 55 * v^2 = 55 * 9.81 * .8
solve for v = 3.96 m/s
When friction occurs, which of the following types of energy is produced?
оооо
chemical energy
electromagnetic energy
heat energy
nuclear energy
Answer:
heat energy
Explanation:
Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.
Look at the diagram below. What will the reading on voltmeter 1 be?
Enter your answer as a number
1.5v 1.5v
HE
(A2
A3
10 Ω
V2
V
10 Ω
V1
A1 0.15A
Answer:
1.5v
Explanation:
This is a series circuit with identical components, so the potential difference will be shared equally between each component. (1.5V + 1.5V) / 2 = 1.5V
According to the diagram, voltmeter 1 will show 1.5 V. Because it is a series combination voltmeter 2 will also show 1.5 V.
What is a Voltmeter?The potential difference, or voltage, between two points in an electrical or electronic circuit is measured using a voltmeter, also referred to as a voltage meter. While some voltmeters are made for use in alternating current (AC) circuits, others are meant to be used in direct current (DC) courses. Voltage for radio frequency (RF) can be measured using specialized voltmeters.
A simple analog voltmeter is a high resistance connected in series with a sensitive galvanometer (current meter). A voltmeter needs to have high internal resistance. Otherwise, it will consume a sizable amount of current, interfering with the test circuit's performance. The range of voltages that the meter can display depends on the series resistance value and the sensitivity of the galvanometer.
Since all of the components in this series circuit are the same, any potential difference will be distributed equally i.e., (1.5V + 1.5V) / 2 = 1.5V
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How does the force of gravity
affect objects on Earth?
A. It pulls objects towards the center of Earth.
B. It pushes objects to Earth's surface.
C. It pushes objects away from Earth.
D. It causes objects to bounce off each other.
Answer:
A. It pulls objects towards the center of Earth.
Explanation:
Think about dropping something, where does it go? If you are on earth, this goes down towards the ground due to the attractive force of gravity on every object (to pull everything to center of earth). Like Newton's apple.
PLEASE HELP ME!!!
predict the products of each of the following equations. Then explain how you made your predictions. Be sure to balance the equations.
___NaBr + ___Ca → _______ + _______
___Mg + ___O2 → _______
#1
Here
Calcium is less reactive than sodium so it can't displace Na .
Nothing will happen
#2
Mg+O_2—»MgOThis is oxidation
The following diagram shows two meteors with masses of 1,000 kilograms and 3,000 kilograms spaced 10 meters apart. What is the magnitude of the gravitational force exerted by the 1,000 kg meteor on the 3,000 kg meteor? 2 × 10-9 N, 2 × 10-6 N, 7 × 10-10 N, 2 × 10-2 N
The attraction between masses as small as our bodies, or even objects the size of skyscrapers, is incredibly small. For example, two 1.0-kg masses located 1.0 meter apart exert a force of 6.7×10−11N 6.7 × 10 − 11 N on each other.Answer:
Explanation:
Even between objects the size of skyscrapers or masses as small as our bodies, there is incredibly little attraction. For instance, a force of 6.71011N is generated when two 1.0-kg masses are placed 1.0 meters apart. 6.7 10 11 N on top of one another.
What magnitude of gravitational force by the meteor?M/s2 is its SI unit. Its vector nature—which includes both magnitude and direction—makes it a quantity. The unit g stands for gravitational acceleration. At sea level, the standard value of g on earth's surface is 9.8 m/s2.
The magnitude of PQ is represented symbolically as | PQ |. The Distance Formula can be used to determine a vector's magnitude if its start and end points' coordinates are known.
Therefore, The distance between a vector's starting point P and ending point Q is its magnitude.
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PLEASE HELP:
Calculate the net force on the box shown in the picture:
Determine the DIRECTION that this box will move once the force is exerted on it.
Determine whether this is a balanced or unbalanced force and what direction the box moves.
ill give u brainliest :)
Answer:
17N
Explanation:
the side with most net force is going to be deducted by the side with the least net force.
While doing the dishes, you drop an iron skillet that’s very hot (200° C or more) into a sink containing a few inches of water at room temperature. Assume the volume of water has about the same mass as the skillet. It’s found that the increase in temperature of the water is much less than the loss in temperature experienced by the skillet. As a matter of fact, after a minute or two, the water feels only slightly warmer than before the skillet was added. Use the space to write a brief explanation of why this is true.
Remember the fact that every object has a specific amount of latent heat of vaporization
The specific heat capacity of iron and water are different
They may have same mass but not same specific heat capacitySo same amount of temperature can't create same amount of heat .Also water is liquid so heat get transmitted through out the solution.Which change will most likely increase the strength of a magnetic field produced by an electromagnet?
Answer:
Increasing the number of loops of wire around the iron core
Hope this helps!
hellooooooooooo peopleeeee
Ball 1, with a mass of 100 g and traveling at 10 m/s, collides head-on with ball 2, which has a mass of 300 g and is initially at rest. What are the final velocities of each ball if the collision is (a) perfectly elastic
Calculate the value of C2 in the circuit below, if C1 = 33 F and Ctotal = 58 F.
The value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.
Capacitance of the circuit
The capacitance of the circuit is calculated as follows.
Assuming a parallel circuit arrangement for the capacitors;
C(total) = C1 + C2
58 F = 33 F + C2
C2 = 58 F - 33 F
C2 = 25 F
Thus, the value of capacitor C2 in the given parallel circuit arrangement of the capacitors is 25 F.
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A weight lifter does 586 J of work on a weight that he lifts in 3.5 seconds. What is the power with which he lifts the weight?
need help fast please
Answer:
Explanation:
The quantity of energy transferred by a force when it is applied to a body and causes that body to move in the direction of the force work.
derive a relation between critical angle and refractive index of a substance
Answer:
Explanation:
Refractive index of denser medium w.r.t rarer medium
[tex]r[/tex]ч[tex]d[/tex][tex]=\frac{1}{sini_{c} }[/tex]
where, [tex]i_{c}[/tex] = critical angle
Which is a dopant for a semiconductor that conducts electricity due to the movement of positive charges?
O thallium
O arsenic
O phosphorus
O antimony
Answer:
The answer is thallium.
Explanation:
the chemical element of atomic number 81, a soft silvery-white metal that occurs naturally in small amounts in pyrite and other ores. Its compounds are very poisonous.True or false: when two objects are rubbed together they both will have either a positive charge or both be negatively charged. Causing them to then repel each other. (1 Point) True False not enough information Maybe
Answer:
true
Explanation:
because rubbing together they will both have friction
Please help me with those multiple choice
Answer:
11. Light waves are electromagnetic (created by electromagnetic impulse)
12. Light waves in a medium are slower V = C / Nm where Nm is the index of refraction of the medium
13. The frequency of the vibration remains the same
14. The wavelength of light in the medium is less
λ = V / f and it was determined in 12 that the velocity is less in the medium
1 astronomical unit (A) is
149,597,871 kilometres
hope it helps...!!!
What are the properties of mars
Answer:
Explanation:
Its surface is rocky, with canyons, volcanoes, dry lake beds and craters all over it. Red dust covers most of its surface. Mars has clouds and wind just like Earth
what is a ravine and why are they made
A ravine is a smaller version of a canyon that is typically formed by stream bank erosion. Ravines are greater in scale than gullies, but smaller than valleys.
What is ravine?A ravine is a slope landform with relatively steep sides,Ravines may or may not contain active streams running along the down slope channel that produced them.
Ravine are frequently characterized by intermittent streams, since their geographic size is too small to maintain a perennial watercourse.
Hence, a ravine is a smaller version of a canyon that is typically formed by stream bank erosion.
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Find the wavelength of a sound moving in air at 43.2 m/s and that has a frequency of
2.11 hz.
a. 20.47
b. 91.152
c. 0.0488
d. 177.35
please help!!
Answer:
a.) 20.47 mExplanation:
Here we are given sound moving in air at 43.2 m/s and that has a frequency of 2.11 hz and we need o calculate the Wavelength.
Using formula:
[tex] \\ \: \: \longrightarrow \: \: \:{ \underline{ \boxed{ \sf Frequency = \dfrac{Wave \: speed}{Wave \: length}}}} \\ [/tex]
Where,
Frequency = 2.11 HzWave speed = 43.2 m/sOn Substituting the values, we get:
[tex]\\ \sf \: \: \: \longrightarrow \: \: \: 2.11 = \dfrac{43.2}{Wave \: Length} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:Wave\: Length = \frac{43.2}{2.11} \\ \\ \\ \sf \: \: \: \longrightarrow \: \: \:{ \pink{ \underline{Wave \:Length = 20.47 m}} }\\ \\ [/tex]
Hence,
Wavelength of a sound moving in air is 20.47 m[tex]\large\boxed{\bold{Formula: λ= \frac{v}{f}}}[/tex]
In this question all the values are given so we'll simply have to substitute the values and solve.
Let's solve!
We'll have to divide the velocity or speed by the frequency.
Substitute the values according to the formula.
[tex] λ= \frac{43.2}{2.11}[/tex]
Calculator answer:
[tex]\bold{λ= 20.47393365 \: m}[/tex]
Now, we can round off to the nearest hundredth.
The value in the thousandths place is smaller than 5 so we won't have to round up.
Final answer:
[tex]\large\boxed{\bold{λ= 20.47 \:m}}[/tex]
Therefore, the wavelength is 20.47 meter.
Answer: Option A