The perimeter of parallelogram pqsr is 74 cm. What is qs?.

Answer:

Explanation:

The efficiency of a Bulb = Total Useful Energy/ Total Energy Supplied

Here in this particular case, Total Useful Energy is actually Light produced in Joules.

Therefore, Efficiency of the bulb = 290/470

=0.6170 or 61.70%

Answer:

A) 12.57 m

B) 5 RPM

C) 3.142 m/s

Explanation:

A) Distance covered in 1 Revolution:

The formula that gives the relationship between the arc length or distance covered during circular motion to the angle subtended or the revolutions, is given as follows:

s = rθ

where,

s = distance covered = ?

r = radius of circle = 2 m

θ = Angle = 2π radians  (For 1 complete Revolution)

Therefore,

s = (2 m)(2π radians)

s = 12.57 m

B) Angular Speed:

The formula for angular speed is given as:

ω = θ/t

where,

ω = angular speed = ?

θ = angular distance covered = 15 revolutions

t = time taken = 3 min

Therefore,

ω = 15 rev/3 min

ω = 5 RPM

C) Linear Speed:

The formula that gives the the linear speed of an object moving in a circular path is given as:

v = rω

where,

v = linear speed = ?

r = radius = 2 m

ω = Angular Speed in rad/s = (15 rev/min)(2π rad/1 rev)(1 min/60 s) = 1.571 rad/s

Therefore,

v = (2 m)(1.571 rad/s)

v = 3.142 m/s

Answer:

l

Explanation:

Answer:

true I believe

Explanation:

For a 1.00 m (100 cm) crumple zone, about 200 kN of deformation is needed in order to keep the passengers safest.

Crumple zones, also known as crush zones or crash zones, are structural safety features used in vehicles, primarily in automobiles, to extend the time before a change in velocity and consequently momentum results from the impact during a collision by means of a controlled deformation.

In recent years, they have also been added to trains and railcars. As the average force delivered to occupants is inversely proportional to the time over which it is applied, crumple zones are intended to extend the duration over which the overall force from the change in momentum is applied to a person.

The equation for the impulse here is:

F Δt = m Δv

where, v is the velocity and m is the mass.

The survival rate of dummy experiments shows about 90% for a 1 m crumple zone. Hence, a deformation of 200-300 kN is needed to keep the passengers safest.

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Answer:

Therefore letter C is the correct answer.

Explanation:

In a projectile motion the total time in the air can be calculated using the following equation:

We analyze the y-component motion.

\(v_{fy}=v_{iy}-gt\)

When the final velocity (v(f)) is equal to zero we calculate the upward time and multiplying it by 2 we find the total time in the air. So we will have:

\(t_{tot}=2\frac{v_{iy}}{g}\)

\(t_{tot}=2\frac{v_{i}sin(\theta)}{g}\)

We can see that the total time is directly proportional to the angle, then when θ increase t increase.

Therefore letter C is the correct answer.

I hope it helps you!  

Answer:

  36 years

Explanation:

Given the equation of Kepler's third law as T² = a³, you want to know the period of an asteroid that has an orbital radius of 11 au.

Solving the given equation for t, we find ...

  T = a^(3/2) . . . . . . take the 1/2 power

Then for a=11, the period in years is ...

  T = 11^(3/2) ≈ 36.48

The period of the asteroid is about 36 years.

Answer: someone took down my answer I don’t know why when I took this test and got it right but the answer is C like the other person said.

Explanation:

The microwave radiation referred to in this context is radiation that was released as matter formed in the early universe. Therefore option A is correct.

Microwave radiation, also known as cosmic microwave background radiation (CMB), is a faint radiation that permeates throughout the universe.

It is considered to be the remnants of the thermal radiation released shortly after the Big Bang, during a phase called recombination. At this time, the universe transitioned from a hot, dense plasma to a state where neutral atoms could form, allowing photons to travel freely.

The cosmic microwave background radiation is isotropic, meaning it is uniformly distributed in all directions, and it has a characteristic temperature of approximately 2.7 Kelvin (-270.45 degrees Celsius).

It was first detected in 1965 by Arno Penzias and Robert Wilson, who were awarded the Nobel Prize in Physics for their discovery.

The presence of cosmic microwave background radiation provides strong evidence for the Big Bang theory and helps to support the understanding of the early universe's formation and evolution.

It serves as an important tool for studying cosmology and provides insights into the structure, age, and composition of the universe.

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Answer:

3

Explanation:

If there is 3 at the moment (atm) is the same as might be (mb) in the air.

Nitrogen oxides play a critical role in photochemical smog. They give the smog its yellowish-brown hue. Indoor residential appliances like gas stoves and gas or wood heaters can be significant emitters of nitrogen oxides in poorly ventilated environments.

Therefore , on conclusion i.e. two gases with molecules consisting of nitrogen and oxygen atoms are nitric oxide (NO) and nitrogen dioxide (NO₂). These nitrogen oxides play a part in the development of smog and acid rain, adding to the issue of air pollution.

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Given that the mass of catapult, m = 18900 kg

The initial velocity is

As the body is at rest initially.

The final speed is

The time taken is t = 3.3 s

We have to find the force.

According to Newton's second law, the formula to calculate force is

Substituting the values, the force will be

Thus, the force is 349363.63 N

Answer:

57

Explanation:

Answer:

Ration of internal energy of hydrogen to the internal energy of helium is equal to \(\frac{5}{6}\)

Explanation:

As we know

degree of freedom of hydrogen is 5

Degree of freedom of helium is 3

Internal energy of hydrogen

\(\frac{5}{2} * 2 * RT = 5 *RT\)

Internal energy of helium

\(\frac{3}{2} * 4 * RT = 6 *RT\)

Ration of internal energy of hydrogen to the internal energy of helium is equal to \(\frac{5}{6}\)

By analyzing the velocity-time graph, we can determine the maximum speed at the end of the constant speed phase and the disability during the deceleration phase.

To sketch the velocity-time graph and determine the maximum speed and disability, let's break down the motion into three phases:

Phase 1: Acceleration

The object starts from rest and undergoes acceleration for 40 seconds at a constant speed. During this phase, the velocity increases linearly with time. The slope of the velocity-time graph will be a straight line with a positive gradient.

Phase 2: Constant Speed

After 40 seconds, the object continues to move at a constant speed for the next 100 seconds. During this phase, the velocity remains constant, resulting in a horizontal line on the velocity-time graph.

Phase 3: disability

After 140 seconds, the object is brought to rest with uniform disability over a duration of 20 seconds. The velocity decreases linearly with time during this phase. The slope of the velocity-time graph will be a straight line with a negative gradient.

To determine the maximum speed, we need to find the highest point on the velocity-time graph. In this case, it occurs at the end of phase 2 when the object is moving at a constant speed. The maximum speed is reached at this point.

To determine the disability, we need to find the slope of the line during phase 3. The negative gradient of the velocity-time graph during the deceleration phase represents the magnitude of the uniform disability.

Therefore, by analyzing the velocity-time graph, we can determine the maximum speed at the end of phase 2 and the disability during phase 3.

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Actually Welcome to the Concept of the Kinematics.

Thus, we have to understand what exactly acceleration is ---

Acceleration is basically the change in the velocity per unit time.

a = v -u/t

thus, we can say that acceleration can be positive or Negative also.

but if,there is no change in the velocity, and it will be a uniform velocity then the acceleration is ZERO

Answer:

fdsbgdfshtrsnbfgsbnhgr

Explanation:

cdfrgresgtrshtrwhtrwhtwjhdgngdabfeahydrtgnb

The magnitude of the velocity of the eagle is 69km/hr.

Given that,

Now the magnitude of the velocity of the eagle is

We know that

Momentum = Mass × velocity

345 = 5 × velocity

So, the velocity is 69 km/hr.

Therefore we can conclude that the magnitude of the velocity of the eagle is 69km/hr.

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A current of 0.82 A flowing through a light bulb for 94 s results in a total charge of approximately 77.08 C passing through the bulb.

To calculate the total charge passing through the light bulb, we can use the formula:

Q = I * t

Where Q is the charge, I is the current, and t is the time. Given that the current is 0.82 A and the time is 94 s, we can substitute these values into the equation:

Q = 0.82 A * 94 s

Calculating the product:

Q = 77.08 C

Therefore, approximately 77.08 C (rounded to two decimal places) of charge passes through the light bulb during the 94-second period. This indicates the amount of electric charge that flows through the light bulb, with one coulomb representing the charge of approximately 6.24 x 10^18 electrons. The charge passing through the light bulb is directly proportional to the current and time, illustrating the fundamental relationship between charge, current, and time in electrical circuits.

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Explanation:

The acceleration of an object depends directly up on the net force acting on the object and inversely upon the mass of the object. As the force acting upon an object is increased; According to Newton, an object will only accelerate if there is a net or unbalanced force acting on it, therefore the acceleration is equal to force divided by the mass

a=F/m

Answer:

the normal human body temperature in Celcius is 37°C, in Fahrenheit is 98.6°F, in Kelvin is 310°K

Answer:

In ionic compounds, electrons are transferred between atoms of different elements ... For example, two hydrogen atoms bond covalently to form an H2 molecule; each ... is released when one mole of H2 molecules forms from two moles of H atoms: ... atom in each pair is more electronegative: (a) N or P. (b) N or Ge. (c) S or F.

Explanation:

If satellite A is in a 2:1 resonance with satellite B, it means that for every two orbits completed by satellite A, satellite B completes one orbit.

In other words, the orbital period of satellite A is exactly twice the orbital period of satellite B. This type of resonance occurs when the gravitational interaction between the two satellites results in a regular and predictable orbital relationship. The gravitational forces between the satellites cause a periodic perturbation that leads to this specific resonance ratio. The 2:1 resonance is a common type of resonance observed in various celestial systems, including moons orbiting planets and satellites orbiting larger celestial bodies. It has important implications for the stability and long-term dynamics of the satellites involved.

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1-there are 46.2cm in 18.62inches, 2- if the artillery range is 6310 yards then the range in miles is 3.58miles, C- if the car is going in 1.000mph then its speed is  0.4470 m/s

1. To convert 18.2 inches to centimeters, multiply by the conversion factor (1 inch = 2.54 cm):
18.2 inches * (2.54 cm / 1 inch) = 46.2 cm (to three significant figures).

2. To convert 6310 yards to miles, first convert yards to feet, then feet to miles:
6310 yards * (3 ft / 1 yard) = 18930 ft
18930 ft * (1 mile / 5280 ft) = 3.58 miles (to three significant figures).

3. To convert 1.000 mph to meters per second, first convert miles to meters, then hours to seconds:
1.000 mile * (1609 m / 1 mile) = 1609 m
1 hour * (3600 s / 1 hour) = 3600 s
(1609 m) / (3600 s) = 0.4470 m/s (to four significant figures).

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A condition that lifts a parcel of air to form cumulus clouds is  differential heating.

Thus, Differential heating of the land and the water. Water changes temperature more slowly because it has a high specific heat, like the ocean. Land, particularly sandy beaches, has a low specific heat, therefore it warms up faster than water with the same amount of heat.

Our beach towels are blown away by this land-and-water combination, but it is also to blame for more extreme weather like monsoons and thunderstorms and heat.

The typical afternoon thunderstorm might be produced by sea breezes. For instance, the Florida peninsula is bordered by the ocean on both sides. Cool air from the Gulf of Mexico blows inland on the western side as a sea breeze. A sea wind from the Atlantic Ocean causes the same thing to occur on the eastern side and differential heating.

Thus, A condition that lifts a parcel of air to form cumulus clouds is  differential heating.

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The time constant of the circuit can be determined from the formula τ = RC. The values given in the question are R = 4.00 MΩ and C = 3.00 µF. Thus, the time constant is given as:τ = RC = (4.00 × 10^6 Ω) × (3.00 × 10^-6 F) = 12 secondsb. The current in the circuit can be found by using Ohm’s law, which states that I = V/R, where V is the voltage across the circuit.

The voltage across the circuit is 12.0 V, so the current is given as:I = V/R = (12.0 V)/(4.00 MΩ) = 3.00 µAThe charge on the capacitor as a function of time can be found using the formula Q = Qmax (1 - e^(-t/τ)), where Qmax is the maximum charge that can be stored by the capacitor. The maximum charge can be found using the formula Qmax = CV, where V is the voltage across the capacitor.

The voltage across the capacitor is the same as the voltage across the circuit, which is 12.0 V. Thus, the maximum charge that can be stored by the capacitor is:Qmax = CV = (3.00 × 10^-6 F) × (12.0 V) = 36 µCThe charge on the capacitor as a function of time is given as:Q = Qmax (1 - e^(-t/τ)) = (36 µC) (1 - e^(-t/12)).

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Answer:

The law of conservation of matter.

A full grocery cart requires more force to push than an empty one because the weight of the groceries is pushing down on the cart, and the cart itself is resisting this downward force.

When both the force and time of contact are doubled, the impulse on an object increases by a factor of four.

When we talk about impulse, we are referring to the change in momentum of an object over a period of time. Impulse is the product of force and time, as given by the formula:
Impulse = Force x Time

the impulse on the ball would be:
Impulse = Force x Time
Impulse = 10 N x 2 s
Impulse = 20 Ns


This would cause the ball to have a momentum of:
Momentum = Mass x Velocity
Momentum = 0.5 kg x (20 N / 0.5 kg) x 4 s
Momentum = 80 Ns
The impulse on the ball increased by a factor of four, and so did the momentum. This shows that the greater the impulse on an object, the greater the change in momentum it will experience.

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The period of a satellite orbiting mercury 265,000 m above its surface is 100 minutes if the radius of the planet mercury is 2.43*10^6m and its mass is 3.2*10^23 kg.

v = √ G M / r

r = R + d

v = Orbital velocity

G = Gravitational constant

M = Mass of planet

r = Radius of the orbit

R = Radius of planet ( mercury )

d = Distance from surface to satellite

m = 3.2 * \(10^{23}\) kg

R = 2.43 * \(10^{6}\) m

d = 265000 m

G = 6.67 * \(10^{-11}\) N m² / kg²

r = R + d

r = 2.43 * \(10^{6}\) + 265000

r = 2.695 * \(10^{6}\) m

v = √ ( 6.67 * \(10^{-11}\) * 3.2 * \(10^{23}\) ) / 2.695 * \(10^{6}\)

v = √ 7.92 * \(10^{6}\)

v = 2.81 * 10³ m / s

v = 2.81 km / s

v = 2 π r / T

T = Time period

T = 2 * 3.14 * 2.695 * \(10^{6}\) / 2.81 * 10³

T = 6.02 * 10³ s

T = 100 minutes

Therefore, the period of a satellite orbiting mercury is 100 minutes

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Answer:

Explanation:

Total energy supplied is,

E = V*I*t

=12 V x 60 A.h (3600 s/ 1 h)

=2.592*10^6 J

The planet of an item will remain constant across the planet, but if you give it more mass, the gravitational force increases while the acceleration due to gravity remains constant.

The mass of the body is defined as the amount of matter a body has. It is denoted by m and its unit is kg. Mass is the quantity on which a lot of physical quantity depends.

Weight is defined as the amount of force an object exerts on the surface. It is given as the product of mass and the gravitational pull.

Mass is an independent quantity it never depends on the other. While weight is a dependent quantity that depends upon the gravitational pull.

The value of gravitational pull is different in the different parts of the universe. For example, on the earth, the value of gravitational acceleration is 9.81 m/sec².While on the moon it is g/6.

Weight is change according to the place or surrounding while the mass of the body is constant everywhere.

The planet of an item will remain constant across the cosmos, but if you give it more mass, the gravitational force increases while the acceleration of gravity remains constant.

If a planet's gravity weakens, the weight of that planet will likewise be altered. With an increase in mass, weight also rises.

Hence, the gravitational force increases while the acceleration due to gravity remains constant for the given case.

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