Calories tell you how much energy is in a food. True or False​

Answer:

The desk will move to the left.

Explanation:

Since Manuel is exerting a force of 10 N to the right, and Lynn is exerting a force of 15 N to the left, it means that Lynn is exerting a force of 5 N more than Manuel, meaning that the desk will move to the left, the direction Lynn is pushing it too.

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The mass of a 5kg object is 5kg. Makes no difference where it happens to be located.

Answer:

The mass of a 5kg object is 5kg

Explanation:

Have a great day

Answer:

T = 1.47 ms

Explanation:

We need to find the period of the wave motion for a wave of frequency 0.68 kHz.

Let the period be T. We know that,

T = 1/f

So,

[tex]T=\dfrac{1}{0.68\times 10^3}\\\\T=1.47\times 10^{-3}\ s\\\\T=1.47\ ms[/tex]

So, the period of the wave motion is 1.47 ms.

Answer:

V=21.0211m/s

Explanation:

Use V=vi+at

So, V=17.46m/s+(1.49m/[tex]s^{2}[/tex])(2.39s)= 21.0211m/s

Answer:

40,000N

Explanation:

Force = Acceleration × Mass

2000×20=40,000

Answer:

Resistance is the measure of the opposition to current flow in an electrical circuit

Resistance refers to the opposition or hindrance that a material or object offers to the flow of electric current. It is a fundamental concept in the field of electrical engineering and physics.

Resistance is measured in ohms (Ω) and is denoted by the symbol "R."

In electrical circuits, resistance is caused by various factors, including the type of material, its dimensions, and its temperature.

The primary element contributing to resistance is the collisions between electrons and atoms within the material through which the current is passing.

When an electric current flows through a conductor, such as a wire, the electrons move along the path of the conductor. However, as they do so, they encounter resistance.

This resistance causes the electrons to collide with atoms, which generates heat and dissipates energy.

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Answer:

where is the example...?

7 true

8 false

9 false

10 false

11 false

12 true

13 true

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Answer:

angular speed ω = 2PI / T rad/sec  

ω^2*r = M*G/r^2

r = ³√ M*G/ω^2 = ³√6.42*10^23*6.67*10^-11*88640^2/39.5 = 2.04*10^7 m

Explanation:

A geosynchronous satellite orbits Mars once every Martian day, 88640 s then the radius of the orbit will be equal to 2.04 × 10⁷ m.

The fundamental force of attraction operating on all matter is recognized as gravity, also spelled gravity, in mechanics. It has no impact on identifying the interior properties of common matter because it is the weakest force known to exist in nature.

As per the given data in the question,

Mass, m = 6.42 x 10²³ kg

Time, T = 88640 s

Use the formula of velocity for satellite,

v = 2πR/T

Where R represents the radius

Use the formula of centripetal acceleration,

[tex]a_c[/tex] = v²/R

Thus;

[tex]a_c[/tex] = (2πR/T)²/R

= 4π²R/T²

The formula for gravitational acceleration is:

[tex]a_g[/tex] = Gm/R²

G = 6.674 × 10⁻¹¹ m³/kg. s²

Now, the satellite's gravitational acceleration is what is responsible for its centripetal acceleration. Thus,

Centripetal acceleration = gravitational acceleration.

Thus;

4π²R/T² = Gm/R²

Making R the subject gives;

R = ∛(GmT²/4π²)

Substitute the values in the above equation,

R = ∛((6.674 × 10⁻¹¹ × 6.42 x 10²³ × 88640²)/(4 × π²))

R = 2.04 × 10⁷ m

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Answer:

As a form of energy, heat has the unit joule (J) in the International System of Units (SI). However, in many applied fields in engineering the British thermal unit (BTU) and the calorie are often used. The standard unit for the rate of heat transferred is the watt (W), defined as one joule per second

Explanation:

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Answer:

dont go to link they will track u

Explanation:

Answer:

[tex]\alpha =1.5\ rad/s^2[/tex]

Explanation:

Given that,

Initial angular velocity, [tex]\omega_i=0[/tex]

Final angular speed, [tex]\omega_f=6\ rad/s[/tex]

Angular displacement, [tex]\theta=12\ rad[/tex]

We need to find the angular acceleration of the tire. We can find it using the third equation of rotational kinematics. So,

[tex]\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{6^2-0^2}{2\times 12}\\\\\alpha =1.5\ rad/s^2[/tex]

So, the angular acceleration of the tire is equal to [tex]1.5\ rad/s^2[/tex].

Answer:

sorry I didn't get it, my apologies

Answer:

Time

Explanation:

Power equals work over a unit of time.

Explanation:

The tension between cars 2 and 3 accelerates cars 3 through 17. That is a total of 15 cars.F = M*a, with M = 15*37,000 = 555*10^3 kga = 0.7 m/s^2Solve for F, in Newtons

Answer: 44.57°C

Explanation:

The following can be deduced from the question:

Specific heat of water = 4.186 J/kg

From the question, we can infer that 625 × 4.186 joules of heat will be lost when there's a 1°C drop of water.

We then calculate the amount if degrees that it'll take to cool for 7.96 x 10⁴J. This will be:

= 7.96 × 10⁴ /(625 × 4.186)

= 79600/(625 x 4.186)

= 79600/2616.25

= 30.43°C

The final temperature will then be:

= 75.0°C - 30.43°C

= 44.57°C

Answer:

Climate.

Explanation:

Weather can be defined as the atmospheric conditions of a particular area over a short period of time.

The elements of weather include precipitation, wind, temperature, atmospheric pressure, relative humidity, cloud, and wind speed.

The long-term average weather for a region is called climate.

This ultimately implies that, when the average atmospheric conditions prevailing in a specific region persists for a very long period of time, it is known as climate.

Answer:

1.25 s

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 25 m/s

Angle of projection (θ) = 30°

Acceleration due to gravity (g) = 10 m/s²

Time (t) to reach highest point =?

The time taken for the particle to reach the highest point can be obtained as follow:

t = uSineθ / g

t = 25 × Sine 30 / 10

t = 25 × 0.5 / 10

t = 12.5 / 10

t = 1.25 s

Thus, it will take the particle 1.25 s to reach the highest point.

A wave is an energetic disturbance in a medium that doesn't include any net particle motion. The velocity of the waves in the string of 0.620 m long which oscillates at 234 Hz is 72.54 m/s.

The distance between two successive wave crests or troughs is referred to as the wavelength. It is estimated in the direction of the wave. Typically, the wavelength is denoted by the symbol λ. The metre is its SI unit.

The relationship between wavelength and frequency is inverse. A wave's frequency decreases as its wavelength increases.

v = fλ

Here length, L = 2λ

λ = L / 2 = 0.620 / 2 = 0.31 m

v = 234 × 0.31 = 72.54 m/s

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Answer:

290.16

Explanation:

I got it right

Answer:

mechanical energy

Explanation:

because except mechanical energy all posseses particles

Answer: -10.08 m/s

Explanation:

Here we only need to analyze the vertical problem.

When the ball is in the air, the only force acting on it will be the gravitational force, this means that the acceleration of the ball, is equal to the gravitational acceleration, then:

a(t) = -9.8m/s^2

Where the negative sign is because gravity pulls the ball down.

To get the velocity equation we need to integrate over time, we get:

v(t) = (-9.8m/s^2)*t + v0

Where v0 is the initial vertical velocity, here it is v0 = 10.5 m/s

Then the velocity equation is:

v(t) =  (-9.8m/s^2)*t + 10.5 m/s

To get the position equation, we need to integrate again over time, we get:

p(t) = (1/2)*(-9.8m/s^2)*t^2 + (10.5 m/s)*t + p0

Where p0 is the initial position, we know that the ball is sent upward from the ground, so p0 = 0m

Then the position equation is:

p(t) = (1/2)*(-9.8m/s^2)*t^2 + (10.5 m/s)*t

Now we need to find the value of t such that the position is equal to zero (this means that the ball hits the ground again).

Then we need to solve:

p(t) = 0 =  (1/2)*(-9.8m/s^2)*t^2 + (10.5 m/s)*t

If we divide both sides by t, we get:

0 =   (1/2)*(-9.8m/s^2)*t + (10.5 m/s)

Now we can solve it:

(1/2)*(9.8m/s^2)*t = 10.5 m/s

t = (10.5 m/s)/((1/2)*(9.8m/s^2)) = 2.14 s

This means that after 2.14 seconds, the ball will hit the ground again.

The velocity of the ball when it hits the ground is equal to:

v(2.14s) = (-9.8m/s^2)*2.14s + 10.5 m/s = -10.08 m/s

Answer:

* in a tube with both ends open

        λ = 2L / n                    n = 1, 2, 3,…

* tube with one end open and the other closed.  

         λ = 4L / n                     n = (2n ’+ 1 )

Explanation:

When a sound wave enters a pipe, a resonance process occurs, whereby only some wavelengths can occur.

* in a tube with both ends open

in this case there are maximums at each end, so if the length of the had is L

              λ = 2L 1st harmonic

              λ = 2 L / 2 2nd harmonic

              λ = 2L / 3

              λ = 2L / n                    n = 1, 2, 3,…

* In the case of a tube with one end open and the other closed.

At the open end there is a belly and at the closed end a node

              λ = 4L 1st harmonic

              λ = 4L / 3 3rd harmonic

              λ = 4L / 5

              λ = 4L / n                  n = 1, 3, 5,… odd

                                       n = (2n ’+ 1 )      where n’ are all integers

Answer:

convergence is the correct answer

Answer:

absorption, concealment, containment, refrain, repression, suppression, withholding, confinement, restriction, constraint

wait no....

diffusion, emission, polarization, spread, ramification, divarication, propagation, transmission, broadcast, circulation and dissipation.

LOL

Answer:

38400N

Explanation:

F=mass×acceleration

=1200×32

=38400

Answer: an isolated system

Explanation: