The ___________ was used to find a Jupiter-sized planet through careful measurements of the changing position of a star in the sky.

Answer:

meter

Explanation:

Answer: The International System of Units is a system of measurement based on 7 base units

Explanation: the metre, kilogram, second, ampere, Kelvin, mole, and candela. These base units can be used in combination with each other.

(a) The speed  of puck A before the collision is determined as 0.847 m/s.

(b) The change in the total kinetic energy of the system that occurs during the collision is 0.009 J.

The speed of puck A before the collision is calculated from the principle of conservation of linear momentum as follows;

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

0.251u₁ + 0.371(0) = 0.251( -0.12) + 0.371(0.654)

0.251u₁ = 0.2125

u₁ = 0.2125/0.251

u₁ = 0.847 m/s to the right

Initial kinetic energy = ¹/₂ x 0.251 x (0.847)² + ¹/₂ x 0.371 x (0) = 0.09 J

Final kinetic energy = ¹/₂ x 0.251 x (-0.12)² + ¹/₂ x 0.371 x (0.654)² = 0.081 J

ΔK.E = 0.081 - 0.09 = 0.009 J ≈ 0 J

Learn more about elastic collision here: https://brainly.com/question/7694106

#SPJ1

Answer:

d) The speed of the astronaut

Explanation:

The sentence describes the speed of the astronaut. This speed value is 10meters per minute.

Now let us understand why;

Therefore, since there is no directional sense, the value indicates speed.

The given sentence describes the speed of the astronaut. Hence, option (d) is correct.

Given data:

The distance covered by the astronaut A is, d = 10 m.

the time interval is, t = 1 min = 60 s.

Clearly,  the given sentence describes the speed of the astronaut. This speed value is 10 meters per minute.  This is because of following reason:

Thus, we can conclude that the given sentence describes the speed of the astronaut. Hence, option (d) is correct.

Learn more about the speed here:

https://brainly.com/question/22610586

Answer:

hello your question is incomplete attached below is the complete question

answer :

20.16 v

Explanation:

The reading of the voltmeter at the instant the switch returns  to position a

L = 5H

i ( current through inductor ) = 1/L ∫ V(t) d(t) + Vo

                                               = 1/5 ∫ 3*10^-3  d(t)  + 0 = 0.6 * 10^-3 t

iL ( 1.6 s ) = 0.6 * 10^-3 * 1.6 = 0.96 mA

Rm ( resistance ) = 21 * 1000 = 21 kΩ

 The reading of the voltmeter ( V )

V = IR

   = 0.96 mA * 21 k Ω  = 20.16 v

Answer:

B. typical number of strokes needed to complete a hole.

Answer:

9N

Explanation:

static friction=normal force x coefficient of static friction

so static friction =30N x 0.3= 9N

Explanation:

9N is the static friction

Answer:

Below

Explanation:

Not sure what numbers you have been taught to use, but heart rates (BPM) above 80% of your maximum heart rate is anaerobic

  your approximate Max heart rate = ( 220 - age in years)

      so if you are 20 y/o    max = 220 - 20 = 200 bpm

            80% of this is 160 beats per min <===above this is anaerobic

It is not recommended to fire a gun straight up into the air.

When a bullet is fired into the air, it will eventually come down and can pose a danger to people and property below. The bullet can still be lethal when it reaches the ground, especially if it lands on a hard surface or hits someone directly.

Additionally, firing a gun in a residential area can be illegal and can result in legal consequences. In general, guns should only be fired in designated shooting ranges or in self-defense situations where there is an immediate threat to life. It is important to handle firearms responsibly and follow all safety guidelines to prevent accidents and injuries.

To know more about the Gun, here

https://brainly.com/question/16568407

#SPJ1

The speed of the cars as they stuck together is 16 m/s.

We know that the momentum after the Collison must be equal to the total momentum before the Collison and thus is what we call the principle of the conservation of linear momentum and that is what we are going to apply here so that it can help us to solve this problem at hand here.

Given that;

Momentum before Collison= Momentum after Collison

Then we have;

( 15,000 kg * 32.0 m/s) + (15,000 kg * 0 m/s) = (15,000 kg + 15,000 kg)v

v = ( 15,000 kg * 32.0 m/s) / (15,000 kg + 15,000 kg)

v = 16 m/s

Learn more about momentum:https://brainly.com/question/24030570

#SPJ1

Answer:

static and current electricity

Answer:

Approximately \(71.6\; {\rm N}\) (assuming that \(g = 9.81\; {\rm N \cdot kg^{-1}}\).)

Explanation:

Refer to the diagram attached. Forces on this object are:

Assuming that \(g = 9.81\; {\rm N \cdot kg^{-1}}\), the magnitude of the weight of the sign would be:

\(\begin{aligned}(\text{weight}) &= m\, g \\ &= (7.30\; {\rm kg})\, (9.81\; {\rm N\cdot kg^{-1}}) \\ &\approx 71.6\; {\rm N}\end{aligned}\).

Note that weight points downwards (negative) and is entirely in the vertical direction. As a result, the \(y\)-component of weight would be equal to \((-71.6)\; {\rm N}\).

Hence, the \(y\)-component of these forces would be:

Since forces on the object to be balanced, forces need to be balanced in each component. For forces in the \(y\)-component to be balanced, forces in the vertical direction need to add up to \(0\; {\rm N}\):

\(0\; {\rm N} + (-71.6)\; {\rm N} + (\text{$y$-component of tension on the right}) = 0\; {\rm N}\).

Hence, the \(y\)-component of the tension from the wire on the right end would be \(71.6\; {\rm N}\).

Answer:

Light takes less time than sound.

Explanation:

Let's say, the teacher and the student are at a distance "d" from each other.

The medium around them would be air.

And,

The speed of light in air is approx. 3× 10⁸ m/s

while, the speed of sound in air is approx. 330 m/s

We have a formula that establishes the relation between speed, distance and time.

\( \boxed{ \mathsf{speed = \frac{distance}{time} }}\)

Our hunt for time — Speed in both the scenarios is known to us whereas the distance is same.

Sound

\( \mathsf{330 = \frac{d}{time_{s}} }\)

\( \underline{\mathsf{time _{s} = \frac{d}{330} }}\)

Light

\( \mathsf{3 \times {10}^{8} = \frac{d}{time _{l} } }\)

\( \underline{ \mathsf{ time _{l} = \frac{d}{3 \times {10}^{8}} }}\)

The best way of comparison is finding their ratio.

\( \implies \mathsf{\frac{ time_{s}}{time_{l} } = \frac{ \frac{d}{330} }{ \frac{d}{3 \times {10}^{8} } } }\)

simplifying the fraction

\( \implies \mathsf{\frac{ time_{s}}{time_{l} } = \frac{d \times (3 \times {10}^{8} )}{330 \times d}}\)

d gets canceled and we're left with the following expression

\( \implies \mathsf{\frac{ time_{s}}{time_{l} } = \frac{ (3 \times10 \times {10}^{7} )}{330}}\)

30, being a common factor in the numerator as well as denominator, gets canceled out. and in its place remains 1/ 11

(why?

=> 30÷330 = 1÷11)

\( \implies \mathsf{\frac{ time_{s}}{time_{l} } = \frac{ 1\times {10}^{7} }{11}}\)

taking timeₛ to the numerator on the other side.

\( \implies \mathsf{time_{s} = \frac{ 1\times {10}^{7} }{11}\times time_{l}}\)

Therefore, we get timeₛ is approx. 10⁶ times the timeₗ.

That's a big difference, no wonder light's way much faster than sound.

As lesser the time taken to cover a distance, faster is the wave.

The sound takes about 874,000 times MORE time than the light takes.

Because it's so much closer to us than any other star.

Among the options given, the choice that would make the best soundproofing for a room is option C: two layers of 0.5 centimeter thick glass with 0.3 centimeters of vacuum between them.

Soundproofing is achieved by reducing the transmission of sound waves from one side of the wall to the other. In this case, the combination of two layers of glass with a vacuum between them helps to reduce sound transmission effectively.

Glass is a denser material compared to air or vacuum, so it naturally provides some sound insulation. Adding an extra layer of glass creates a barrier that helps to further dampen sound vibrations. The vacuum between the glass layers acts as an additional sound barrier, as sound waves have difficulty propagating through a vacuum due to the absence of a medium for transmission.

On the other hand, a single layer of 1.0 centimeter thick glass (option A) or two layers of 0.5 centimeter thick glass with 0.5 centimeters of air between them (option B) would provide some sound reduction but not as effective as the combination of glass layers with a vacuum in option C.

1.0 centimeter thick steel (option D) would have high density and mass, which could help with sound insulation to some extent. However, steel can still transmit vibrations and might not be as effective as the combination of glass layers with a vacuum in option C for soundproofing a room.

For more such questions on Soundproofing

https://brainly.com/question/30258610

#SPJ8

Answer:

The ball took 1.5 seconds to get to the 3rd baseman

Explanation:

Constant speed motion

If a body travels the same distance per unit of time, the body has a constant speed. The equation for the distance x is:

x=v.t

Where v is the constant speed and t is the time.

Solving for t:

\(\displaystyle t=\frac{x}{v}\)

The ball is thrown with a speed of v= 20 m/s and travels x=30 m, thus the time taken is:

\(\displaystyle t=\frac{30}{20}=1.5\)

The ball took 1.5 seconds to get to the 3rd baseman

Answer:

Explanation:

CO2 is linear whereas NH3 has a trigonal pyramidal shape. NH3 is sp3 hybridized and the lone pairs on nitrogen repel other groups around nitrogen thus the bond angle becomes less than 109.5 (typically around 106.7).

CO2 is also sp hybridized and both O are equally pulling on both sides rendering the molecule to be non polar and linear with a bond angle of 180.

At point P, the electric potential is 0. This is due to the fact that the positive and as a result, at point P, their electric potentials are cancelled.

Positive and negative electrical charges are referred to as opposite forms of charge. A positively charged object will draw a negatively charged object, in accordance with our core concept of charge interaction.

We can apply the following equation to find the electric potential at point P: V = kQ/r1 - kQ/r2.

where:

k = Coulomb's constant (9 x 10⁹ N m²/C²),Q = magnitude of the charge (3.3 μC = 3.3 x 10⁻⁶ C), r1 = distance from the positive charge to point P (a = 0.35 m), r2 = distance from the negative charge to point P (a = 0.35 m)

Using these values, we can calculate the potential at point P as follows:

V = (9 x 10⁹ N m²/C²) * (3.3 x 10⁻⁶  C) / (0.35 m) - (9 x 10⁹ N m²/C²) * (3.3 x 10⁻⁶ C) / (0.35 m)

V = 0.

To know more about electric potential visit:-
https://brainly.com/question/12645463

#SPJ1

By Newton's second law, the gravitational force F between an object of mass m and a planet of radius r and mass M is on the surface of the planet is

F = G M m / r ² = m a

where

G = 6.67 × 10⁻¹¹ N•m²/kg², the universal gravitational constant

a = the acceleration of the object (not the planet; note that the right side is m times a, and not M times a)

The object's mass cancels on either side, leaving you with

a = G M / r ²

and this acceleration is due to gravity. On Earth, a = g.

Let M be the mass of Earth and r its radius; then

g (Earth) = G M / r ² ≈ 9.80 m/s²

To find g on Mercury, replace r with 0.38r and M with 0.055M :

g (Mercury) = G (0.055M) / (0.38r )² = 0.055/0.38² G M / r ²

g (Mercury) ≈ 0.38 g (Earth) ≈ 3.73 m/s²

Answer:

Force

Explanation:

Answer:

The fraction of incident light or radiation reflected by a surface or body, commonly expressed as a percentage.

2.

biology The whitish inner portion of the rind of citrus fruits that is a source of pectin, commonly referred to as the pith.

Explanation:

Answer:

D gravity

Explanation:

please mark me brainliest

Answer:

D. The force that the branch applies to the kitten

Explanation:

I just took the quiz and got it correct!

Take into account that the total linear momentum must conserve, that it, it is equal before and after the collision:

p_before = p_after

or by using the expression for the momentum p = mv, you have for the given situation:

Based on the given information you have:

m1 = 7.05kg

m2 = 1.52kg

v1i = 8.24m/s

v2i = 0m/s

v1f = ?

v2f = 13.2m/s

m1 is the mass of the ball, m2 is the mass of the pin, v1i and v1f makes reference to speed of ball before and after the collision, v2i and v2f makes reference to the speed of pin before and after the collision:

By solving the equation above for v1f, you get:

By replacing the values of the parameters:

Hence, the speed of the ball after the collision is approximately 5.34m/s

Answer:

24 s

Explanation:

8 s / tic    *    3 tic = 24 sec from origin

Given the speed of the driver and the time elapsed, distance traveled during his inattentive period is 0.037 kilometers.

Speed is simply referred to as distance traveled per unit time.

Mathematically, Speed = Distance ÷ time.

Given the data in the question;

First, convert 1.7 seconds to hours.

Time = 1.7s = (1.7 / (60×60)hr = 1.7/3600 hrs

Now, find the distance traveled during the inattentive period.

80 km/h = Distance ÷ 1.7/3600 hrs

Distance = 80 km/h × 1.7/3600 hrs

Distance = 136/3600 km

Distance = 0.037 km.

Given the speed of the driver and the time elapsed, distance traveled during his inattentive period is 0.037 kilometers.

Learn more about speed and distance here: brainly.com/question/7359669

#SPJ1

If an airplane is  is accelerating down a runway at 2.5 m/s². It's velocity changes 2.5 m/s in each second.

Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.

Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.

Hence, the velocity of the airplane changes 2.5 m/s in each second  when it  is accelerating down a runway at 2.5 m/s².

Learn more about acceleration here:

brainly.com/question/12550364

#SPJ1

To organize things and concepts:-

To organize an essay, begin by writing a thesis assertion that makes a completely unique statement about your subject matter. Then, write down every one of the points you need to make that support your thesis announcement. as soon as you've got all of your primary factors, enlarge them into paragraphs the use of the records you observed throughout our studies.

Without a clear organizational pattern, your reader may want to become burdened and get bored. The way you shape your essay facilitates your readers to draw connections between the body and the thesis, and the structure also maintains our target as you plan and write the essay.

Learn more about concepts here:-https://brainly.com/question/14036778

#SPJ1

Because of the way our eyes have developed, we can only detect waves that have the specific duration and frequency that define them; this is why we can really see white light but not electromagnetic radiation or gamma radiation.

Bands : "Wavelength of 0.11 nm" for band "X ray band alone".

band "visible light band only": speed of \(3\) × \(10^{8} m/s\)  frequency of \(2.331. 10^{16}\)Hz, frequency of  \(5.48 10^{14}\) Hz. a wave length of 637 nm.

The aforementioned waves share any characteristics with the other band. We might be able to view the X-rays if they were like that.

band "neither band": "speed of 3 × \(10^{8} km/s"\). The light moves more quickly than anything else.

To know more about Wavelength click here

brainly.com/question/13533093

#SPJ1

Answer:

v= 17.15 m/s

Explanation:

mass of the book=0.1 Kg

height above ground, h= 15 m

Using conservation of energy

Potential energy is converted into kinetic energy

\(mgh = \frac{1}{2}mv^2\)

\(v=\sqrt{2gh}\)

\(v=\sqrt{2\times 9.8\times 15}\)

\(v=\sqrt{294}\)

v= 17.15 m/s

Hence, the book will hit the ground at the speed of 17.15 m/s.