Michelle loves basketball, but she recently broke her wrist after falling on the court. The doctor has suggested that she avoid any activity that could jeopardize her recovery or cause further injury until the cast comes off. To modify her activity to maintain her aerobic fitness level, she can (5 points)

Answer:

temperature and relative motion

Explanation:

Answer:

True

Explanation:

mass, length, time, electric current, temperature, luminous intensity and amount of substance

Answer:

water or conduct experiment requiring the water to be in liquid state. A coffee

addicted physicist stationed at a research base requires about 0.8 kg of ice for

his coffee on the hour.

a. How much heat is required to convert 0.8 kg of ice at -35 °C into steam

at 100°C?

[5]

b. Plot the temperature - energy graph for the processes in (a). [5]

C. The surface tension of water was determined in a laboratory by using

the drop weight method. 100 drops were released from a burette the

inner diameter of whose opening is 1.8 mm. The mass of the droplets

was 3.78 g.

i. Determine the surface tension of the water and, comparing it

with the tabulated value,

161

ii. Calculate the relative error of the measurements.

If the voltage source or EMF is removed from a conductor, the electron flow within the conductor will eventually stop.

This is because the voltage source creates an electric field that causes the free electrons in the conductor to move, creating an electric current. When the voltage source is removed, the electric field disappears, and the free electrons in the conductor will no longer have a driving force to move them. As a result, the electrons will begin to lose energy and eventually come to a stop, leading to the cessation of the electric current.

It's worth noting that the time it takes for the electron flow to stop depends on various factors such as the resistance of the conductor, the capacitance of the circuit, and the amount of charge stored in any capacitors present in the circuit.

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Answer:

68.2 Quadrillion meters

Explanation:

A lightyear is the distance that light travels in one year.

Speed of light is \(3*10^8\ m/s\)

So light covers 300,000,000 meters in one second.

One year has 31536000 seconds so , light covers

\(9.461*10^{15}\ meters\ in\ one\ year\)

so 7.2 light years is

\(7.2*(9.461*10^{15})\\6.82*10^{16}\)

so 7.2 light years is

6.82 x 10^(16) meters or

68.2 Quadrillion meters

To calculate the wavelength of a radio station's frequency, we can use the formula:

Wavelength = Speed of Light / Frequency

The speed of light is approximately 3 x 10^8 meters per second.

Given that the frequency of WYEP radio station is 9.13 x 10^7 hertz (91.3 megahertz), we can plug in the values:

Wavelength = (3 x 10^8 m/s) / (9.13 x 10^7 Hz)

Dividing the values, we get:

Wavelength = 3.28 meters

Therefore, the wavelength of WYEP radio station's frequency is approximately 3.28 meters.\(\)\(\huge{\mathcal{\colorbox{black}{\textcolor{lime}{\textsf{I hope this helps !}}}}}\)

♥️ \(\large{\textcolor{red}{\underline{\texttt{SUMIT ROY (:}}}}\)

When the mass of wire is 0.01 kg then the tension in the wire is 129.60N.

Here given that,

The mass of the wire, m = 0.01kg

Vibration frequency, f = 150Hz

The length of the wire, l = 60cm

                                         = 0.6 m

The wavelength of the stationary wave (λ) is proportional to the length of the wire as follows:

λ = 2l/n where n is the number of nodes in the wire,

n=1 for fundamental node:

2l = 2 x 0.6

λ = 1.2 m

The transverse wave speed in the string is given as,

v = fλ

=150 x 1.2

=180m/s.

The tension produced by the string is given by the relationship:

T = v²µ

=(180)² x 4.0 x 10⁻²

= 129.60N

Therefore the tension in the wire is 129.60N.

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An increase in the entropy of a system can be described as an increase in the total amount of disorder in a system.

Entropy

Entropy is a measurable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty. From classical thermodynamics, where it was originally recognized, through the microscopic description of nature in statistical physics, to the fundamentals of information theory, the phrase and concept are utilized in a variety of disciplines. It has numerous applications in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, especially the exchange of information. 

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Given:

The speed of the nerve impulse in a human body is: v = 100 m/s

The height of the woman is: d = 1.60 m

To find:

Time taken by nerve impulses to travel from the foot to the brain.

Explanation:

We assume that the nerve impulse travels at a uniform speed.

The speed "v" is given as:

Rearranging the above equation, we get:

Substituting the values in the above equation, we get:

Final answer:

Thus, a nerve impulse takes 0.016 seconds to travel from foot to brain.

Answer:

B mass and velocity......................

Answer:

Explanation:

1.)acceleration= final velocity-initial velocity/time

90m/s-0m/s /3seconds

=30m/s^2

2.) distance= speed*time

90m/s*3seconds

=270m

Answer:

a. 0

b. 1.103625 MJ

c. Conserved

d. 1.103625/n MJ where n = The number of forces

Explanation:

The mass of the drone, m = 750 kg

The upward lift force = 125% of the weight of the drone

The time it takes the drone to reach a height of 250 m = 25 seconds

a. The mechanical energy = The kinetic energy + Potential energy

Therefore, given that the drone stars motion from the surface and was initially at rest, the mechanical energy at the surface = 0

b. The mechanical energy at height, h = 150 m, ME₁₅₀ = The potential energy gained = m·g·h

Where;

g = The acceleration due to gravity = 9.81 m/s²

∴ ME₁₅₀ = 750 kg × 9.81 m/s² × 150 m = 1103625 J = 1.103625 MJ

c. The mechanical energy is equivalent to the potential energy of the drone at the 150 m height, therefore, it is conserved

d. The work done by the force = The energy gained

Therefore, where there are n number of forces, the work done by each force = 1.103625/n MJ

Explanation:

Weight (N) = Mass * Acceleration

75.74 kg = Mass * 9.8 m/sec^2

Mass = 7.72 kg

Weight = 75.74 N

Considering the change of units and the definition of weightm the weight is 742.8494 N and the mass is 75.80kg

On one side, 1 lb equals 4.4482 Newtons. So, to determine the weight in Newtons you can apply the following rule of three: if 1 lb equals 4.4482 Newtons, 167 lb equals what amount in Newtons?

\(weight=\frac{167 lbx 4.4482 Newtons}{1 lb}\)

weight= 742.8494 N

On the other side, mass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.

The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

Weight is calculated as the product of the object's mass and the value of the gravitational acceleration:

W= m×g

In this case, you know:

Then:

742.8494 N= m× 9.8 m/s²

Solving:

m=742.8494 N÷ 9.8 m/s²

m= 75.80 kg

Finally, the weight is 742.8494 N and the mass is 75.80kg

Learn more:

These discoveries have expanded our understanding of planetary systems beyond our own solar system. They provide valuable insights into the formation and diversity of planets, and contribute to the ongoing search for potentially habitable worlds.

In the past several years, astronomers have made significant advancements in detecting massive planets that orbit other stars. More than 80 of these planets have been discovered, and many of them are comparable in size or even larger than Jupiter.

The detection of these massive planets is primarily achieved through a technique called radial velocity method or Doppler spectroscopy. This method relies on observing the slight wobbling motion of a star caused by the gravitational pull of an orbiting planet. As the planet orbits the star, it exerts a gravitational force that causes the star to move slightly towards and away from us. This movement is detected by measuring the Doppler shift in the star's spectrum.

By carefully analyzing the variations in the star's radial velocity, astronomers can infer the presence and characteristics of the orbiting planet. This includes its mass, orbital period, and distance from its host star.

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Answer:

We can know if we use scientific knowledge like researching exploring things in your environment

Explanation:

scientific guess also none has hypothesis

While Jupiter is larger than Earth, it is still much smaller than the sun or a comet. Therefore, the correct answer is (2) a comet.  

Based on our current knowledge, Jupiter's composition is most like that of an asteroid. Jupiter is a gas giant, primarily composed of hydrogen and helium, with trace amounts of other elements such as methane, ammonia, and water. Jupiter is a gas giant, which means that it is composed mainly of gas rather than solid matter. The gas giants in our solar system, including Jupiter, are believed to have formed from a swirling disk of gas and dust that surrounded the sun in the early days of the solar system.

The composition of Jupiter is primarily hydrogen and helium, with trace amounts of other elements such as methane, ammonia, and water. These elements combine to form the gas giant's atmosphere, which is made up of layers of different gases that extend from the planet's rocky core to its outer atmosphere. Therefore, the correct answer is (2) a comet.  

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Correct Question:

overall, jupiter's composition is most like that of group of answer choices

1. earth.

2. a comet.

3. the sun.

4. an asteroid.

Answer:

Explanation:

lll

Answer:

Unbalanced

Explanation:

Hussein is pushing 2 N harder.

Answer:

all of the above.Explanation:

Answer:

im not sure but i think b. cannot withstand the pressure...

if not all the above.

Explanation:

A spacecraft with a ballistic coefficient (BC) of 1000 Pa enters the atmosphere of Mars at an altitude of 300 km with a velocity of 6200 m/s and a flight path angle of -15°.

(a) The velocity of the spacecraft is 5532.9 m/s, and the deceleration rate (dv/dt) is 3.08 m/s^2 (0.315 Earth g, or 0.104 Mars g).

(b) The maximum deceleration rate is 8.32 m/s^2 (0.849 Earth g or 0.279 Mars g), and the maximum load factor is 4.47 g. These values occur at a velocity of 5015.5 m/s and an altitude of 30.5 km.

(c) At an altitude of 75 km, the velocity of the spacecraft is 3559.9 m/s, the deceleration rate is 2.54 m/s^2 (0.259259 Earth g or 0.085 Mars g), and the load factor is 1.53 g.

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Answer: The change in momentum is +20 kg.m/s

Explanation:

To calculate the final velocity of object, we use the first equation of motion:

\(v=u+at\)

where,

v = final velocity

u = initial velocity = 0 m/s

a = acceleration = \(10m/s^2\)

t = time = 0.5 s

Putting values in above equation, we get:

\(v=0+(10\times 0.5)\\\\v=5m/s\)

Momentum is defined as the product of the mass and velocity of an object. It is given by the equation:

\(p=mv\)

where,

p = momentum

m = mass of object = 2 kg

Let the upward velocity be positive and the downward velocity be negative

When the object is dropped, the velocity is downward

v = -5m/s

Initial momentum = \(2kg\times (-5m/s)=-10kg.m/s\)

When the object is bounced back, the velocity is upward

v = +5m/s

Final momentum = \(2kg\times (+5m/s)=10kg.m/s\)

Change in momentum = Final - Inital

Change in momentum = [10 - (-10)] = +20 kg.m/s

Hence, the change in momentum is +20 kg.m/s

Answer:

3.67 m/s

Explanation:

Answer:

Approximately \(2.8 \times 10^{5} \; \rm J\) (assuming that the car is moving on level ground, and that there is no friction to hinder the motion of the car.)

Explanation:

Formula for the kinetic energy, \(\rm KE\), of an object of \(m\) travelling at velocity \(v\):

\(\displaystyle \text{KE} = \frac{1}{2}\, m \cdot v^{2}\).

Let \(v_1\) and \(v_2\) denote the velocity of this car before and after the acceleration.

Kinetic energy of this car before the acceleration:

\(\begin{aligned}\text{KE}_1 &= \frac{1}{2}\, m \cdot {v_1}^{2} \\ &= \frac{1}{2} \times 700\; \rm kg \times (12\; \rm m \cdot s^{-1})^{2} \\ &\approx 5.0 \times 10^{4}\; \rm J\end{aligned}\).

Kinetic energy of this car after the acceleration:

\(\begin{aligned}\text{KE}_2 &= \frac{1}{2}\, m \cdot {v_2}^{2} \\ &= \frac{1}{2} \times 700\; \rm kg \times (30.6\; \rm m \cdot s^{-1})^{2} \\ &\approx 3.3\times 10^{6}\; \rm J\end{aligned}\).

Assume that this car was travelling on level ground. Also assume that there is no friction to hinder the motion of this car. The work of the engine of this car  would be equal to the amount of \(\rm KE\) that the car has gained:

\(\rm KE_2 - KE_1 \approx 2.8\times 10^{5}\; \rm J\).

The beat frequency is 3 beats/sec.

Beat frequency(n) can be found by using the following formula:

n=f2-f1, where f2 and f1 are the given frequencies

n= 515-512

n= 3 beats/sec

Therefore the beat frequency when 512 Hz and 512Hz tuning forks are sounded together is 3 beats/sec.

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Answer:

(a) - \(R_{eq.}=8 \ \Omega\)

(b) - \(I_1=3 \ A, \ I_2= 1.8 \ A, \ I_3=1.2 \ A\)

(c) - \(\Delta V_1=6 \ V, \ \Delta V_2= 18\ V, \ \Delta V_3= 18 \ V\)

Conceptual:

Things to know about parallel/series resistors:

A resistor takes electrical energy and converts it to some other form of energy, such as heat. In doing so this can alter a circuit's current and divide voltages.

Electrical current is the flow of charged particles.

To put it simply, voltage is what "pushes" current through a circuit.

\(\boxed{\left\begin{array}{ccc}\text{\underline{Ohm's Law:}}\\\\\Delta V=IR\end{array}\right}\)

How you should tackle these types of problems:

I recommend combining resistors until you have one resistor. This one resistor is what your total resistance is, which I call the equivalent resistor. Then work backwards from the equivalent resistor to find any information you need, utilizing Ohm's law and properties of parallel/series resistors.

Step-by-step:

Refer to the attached image(s).

Answer:

a

Explanation:

The speed of the ball seven seconds later is 28.6 m/s.

We have the following information;

initial velocity of the ball = 40 m/s

time taken = 7 seconds

Acceleration of the ball = 9.8 m/s^2

Now;

v = u - gt (the ball is moving upwards)

v = 40 - (9.8 * 7)

v = 28.6 m/s

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The value of the inductance L is approximately 1193.25 mH.

To solve for the value of the inductance L, we can use the formula:

Vrms = Ipeak * (2 * pi * f * L)

where:

Vrms = 9.0 V

Ipeak = 60 mA = 0.06 A

f = 20 kHz

Substituting the values into the formula:

9.0 V = 0.06 A * (2 * pi * 20,000 Hz * L

Simplifying:

L = 9.0 V / (0.06 A * 2 * pi * 20,000 Hz)

L = 9.0 / (0.007536)

L = 1193.25 mH (rounded to two decimal places)

Therefore, the value of the inductance L is approximately 1193.25 mH.

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An inductor is connected to a 20 kHz oscillator that produces an RMS voltage of 9.0 V. The peak current is 60 mA. The value of the inductance L is  1.692 mH.

Let's start by using the given information and then we'll solve for the value of the inductance L step by step:
1. Frequency of the oscillator (f) = 20 kHz = 20,000 Hz
2. RMS voltage (Vrms) = 9.0 V
3. Peak current (I_peak) = 60 mA = 0.06 A
Now, let's find the peak voltage (V_peak) using the relationship between RMS voltage and peak voltage:
Vrms = V_peak / √2
V_peak = Vrms * √2
V_peak = 9.0 V * √2 ≈ 12.73 V
Next, we'll calculate the impedance (Z) of the inductor using Ohm's law, which relates peak voltage and peak current:
Z = V_peak / I_peak
Z ≈ 12.73 V / 0.06 A ≈ 212.17 Ω
Now, we'll use the formula for the impedance of an inductor:
Z = 2 * π * f * L
Let's solve for the inductance L:
L = Z / (2 * π * f)
L ≈ 212.17 Ω / (2 * π * 20,000 Hz)
L ≈ 1.692 × 10^-3 H
Finally, convert the inductance L to millihenries (mH):
L ≈ 1.692 mH
So, the value of the inductance L is approximately 1.692 mH.

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