Two blocks travel along a level frictionless surface. Block A is initially moving to the right, while block B is initially at rest. The mass of block A is greater than the mass of block B. The positive x-direction is to the right. The magnitude of the change in momentum of block A is ______ the magnitude of the change in momentum of block B.

Answer:

Explanation:

The relation between time period of moon in the orbit around a planet can be given by the following relation .

T² = 4 π² R³ / GM

G is gravitational constant , M is mass of the planet , R is radius of the orbit and T is time period of the moon .

Substituting the values in the equation

(.3189 x 24 x 60 x 60 s)²  = 4 x 3.14² x ( 9380 x 10³)³ / (6.67 x 10⁻¹¹ x M)

759.167 x 10⁶ = 8.25 x 10²⁰ x 39.43 / (6.67 x 10⁻¹¹ x M )

M = .06424  x 10²⁵

= 6.4 x 10²³ kg .

Answer:

t = 3.924 s

Explanation:

First, we will calculate the amount of work required to get the astronaut back to the capsule:

[tex]W = Fd\\[/tex]

where,

W = work required = ?

F = Force = Weight = mg = (80 kg)(9.81\ m/s²) = 784.8 N

d = distance = 5 m

Therefore,

[tex]W = (784.8\ N)(5\ m)\\W = 3924 J[/tex]

Now the time can be calculated as:

[tex]Power = \frac{W}{t}\\t = \frac{W}{Power}\\\\t = \frac{3924\ J}{1000\ W}\\\\[/tex]

t = 3.924 s

Answer: the horizontal component of total momentum

Explanation:

Since the open cart is rolling to the left on the horizontal surface, the quantity that has the same value just before and just after the package lands in the cart is the horizontal component of total momentum.

Momentum, is the product of the mass of a particle and the velocity of the particle. The change of momentum depends on the force which acts on it. The addition of the the individual momenta is the total momentum.

Explanation:

Given that,

The frequency of oscillation, f = 0.5 Hz

(a) Let the length of the pendulum string is l. So,

[tex]T=2\pi \sqrt{\dfrac{l}{g}}[/tex]

T is time period, T = 1/f

So,

[tex]l=\dfrac{(\dfrac{1}{f})^2g}{4\pi ^2}\\\\l=\dfrac{(\dfrac{1}{0.5})^2\times 9.8}{4\times 3.14 ^2}\\\\l=0.993\ m[/tex]

(b) When the elevator starts to accelerate upwards, new acceleration is a+g.  If accelerating upward, the value of g has increased, because of inertia. So it will feel heavier and the period will decrease.

Answer:

D. The particles move more quickly and begin to move from place to place.

Explanation:

Answer:

If the frequency of a wave is doubled, what happens to its wavelength? If the frequency is doubled, the wavelength is only half as long. 3. ... As the frequency slows down, the wavelength increases.

Explanation:

Answer:

25 ohms

Explanation:

Hi there!

Ohm's law states that [tex]V=IR[/tex] where V is voltage, I is current and R is resistance.

Plug the given information into Ohm's law (V=50, I=2) and solve for R

[tex]V=IR\\50=2R[/tex]

Divide both sides by 2 to isolate R

[tex]\frac{50}{2}= \frac{2R}{2} \\25=R[/tex]

Therefore, there are 25 ohms of resistance present in this circuit.

I hope this helps!

Answer:

The answer is C the ball is not in a closed system and experience an impulse.

Explanation:

Answer:

refers to the generation of people born between the early 1980s and 1990s

Answer:

9000

Explanation:

f=ma

f= force

m=mass

a=acceleration

f=ma

4500×2.0

9000N

Answer:

Explanation:

1/v - 1/u = 1/f

given, f = 0.3 m, u = -0.4m

so, 1/v - 1/-0.4 = 1/0.3

or, 1/v = 1/0.3 - 1/0.4 = 1/1.2

v = 1.2 m

now, differentiating 1/v - 1/u = 1/f with respect to t,

-1/v² dv/dt + 1/u² du/dt = 0

or, dv/dt = (v/u)² du/dt

putting, du/dt = 0.01 m/s , v = 1.2 m and u = -0.4 m

so, dv/dt = (1.2/-0.4)² × 0.01

= 0.09 m/s

hence, speed of image with respect to lens is 0.09 m/s .

from formula of magnification

magnification, m = v/u

differentiating with respect to time both sides,

dm/dt = (u dv/dt - vdu/dt)/u²

= (-0.4 × 0.09 - 1.2 × 0.01)/(-0.4)²

= (-0.036 - 0.012)/0.16

= -0.048/0.16

= -0.3 m/s

hence, magnitude of rate of change of lateral magnification is 0.3 m/s

Answer:

Reaction rate are not sensitive to temperature.

Force = mass × acceleration

9 = 65 x acceleration

acceleration= 9/65 = 0.318 m/s2

Acceleration Tecle, with a mass of 65.0 kg, is standing on an ice-skating rink. His friend applies a force of 9.0 N to him.  Tecle's resulting acceleration is  0.318 m/s²

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.

The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

Force = mass × acceleration

9 = 65 x acceleration

acceleration= 9/65 = 0.318 m/s²

Acceleration Tecle, with a mass of 65.0 kg, is standing on an ice-skating rink. His friend applies a force of 9.0 N to him.  Tecle's resulting acceleration is  0.318 m/s²

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Answer: D

Explanation: I just took the test

Answer:    Both exhibit the Doppler effect, but radar uses radio, and the siren' uses sound waves.

Explanation:   I took the test

[tex]\huge{\textbf{\textsf{{\color{navy}{An}}{\purple{sw}}{\pink{er}} {\color{pink}{:}}}}}[/tex]

C. A nebula.

Answer:

a nebular

hope it up

Explanation:

wirks

Answer:

6.4 cm.

Explanation:

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

Coefficient of linear expansion (α) = 25×10¯⁶ / °C

Original length (L) = 4850 cm

Initial temperature (T₁) = 2 °C

Final temperature (T₂) = 55 °C

Change in length (ΔL) =?

The change in the length of the wire can be obtained as follow:

α = ΔL / L(T₂ – T₁)

25×10¯⁶ = ΔL / 4850(55 – 2)

25×10¯⁶ = ΔL / 4850 × 53

25×10¯⁶ = ΔL / 257050

Cross multiply

ΔL = 25×10¯⁶ × 257050

ΔL = 6.4 cm

Therefore, the change in the length of the wire is 6.4 cm

Answer:i

Explanation:

Answer:

A,B,C,D,F,G

Explanation:

Edge 2021

The atoms, subatomic particles, particles that are 10^-9m, microtechnology systems, neutrons and particles that are 10^-3m  will displays the effects of quantum mechanics.

Quantum Mechanics is the branch of mechanics deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave–particle duality, the uncertainty principle, and the correspondence principle is Quantum Mechanics.

It is theory says at subatomic level, energy exists in discrete levels as "quanta" and particles behave as waves.

A Subatomic particles are the particle that are present inside an atom. These particles are electrons, protons, and neutrons.

Thus, atoms, subatomic particles, particles that are 10^-9m, microtechnology systems, neutrons and particles that are 10^-3m  will displays the effects of quantum mechanics.

Learn more about Quantum Mechanics;

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Answer: I think it’s Global for the 1st one

And free trade for the 2nd one

Explanation:

The correct answer is: "After World War II, political leaders from various countries discussed ways to strengthen individual economies." They began promoting economic policies to boost production and exports.

After World War II, many countries were left with weakened economies and infrastructure, and there was a need for economic recovery and growth. To achieve this, political leaders from different countries came together to discuss ways to strengthen their individual economies and also promote international economic cooperation. One of the ways they did this was by promoting economic policies that aimed to boost production and exports. This involved policies that encouraged businesses to increase their output and create more jobs, as well as policies that made it easier for countries to trade with each other.

Hence, after World War II, political leaders from various countries discussed ways to strengthen their individual economies. They began promoting economic policies to boost production and exports.

Learn more about World War II's aftermath here.

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Answer:

The answer is B.

Explanation:

مافيني اشرح

Answer:

marijuana effects on Serotonin and GABA

Explanation:

A psychoactive drug is a chemical that changes our states of consciousness, and particularly our perceptions and moods. These drugs are commonly found in everyday foods and beverages, including chocolate, coffee, and soft drinks, as well as in alcohol and in over-the-counter drugs, such as aspirin, Tylenol, and cold and cough medication. Psychoactive drugs are also frequently prescribed as sleeping pills, tranquilizers, and antianxiety medications

These drugs are thought to raise serotonin levels by inhibiting the reuptake process that brain cells use to remove excess serotonin. But several lines of evidence suggest that marijuana has negative effects on serotonin levels and may block the action of serotonin-boosting

The drug activates CB1 receptors on GABAergic and glutamatergic neurons in the ventral tegmental area (VTA), inhibiting the activity of both. CB1 inhibition of GABA neurons promotes, and inhibition of glutamate dampens, VTA dopaminergic neurons' activity and dopamine release in the NAC.

Learn more about Marijuana

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Answer:

Aerobic exercise is an important component of a healthy lifestyle. Find out more about aerobic equipment that can help keep you fit.

Aerobic equipment simulates the movements of aerobic exercises such as walking, jogging, rowing, skiing, hiking, biking, and climbing. These activities rhythmically and continuously move your large muscles — the key to getting your heart beating fast enough and long enough for aerobic conditioning.

Answer:

b. 600,000 J

Explanation:

Applying the law of conservation of energy,

The thermal energy created = Kinetic energy of the suv.

Q' = 1/2(mv²)............... Equation 1

Where Q' = Thermal energy, m = mass of the suv, v = velocity of the suv.

From the question,

Given: m = 3000 kg, v = 20 m/s

Substitute these values into equation 1

Q' = 1/2(3000×20²)

Q' = 600000 J

Hence the right option is b. 600,000 J

Answer:

8.24 m/s²

Explanation:

Applying,

T = 2π√(L/g).................... Equation 1

Where T = period of the pendulum, L = Length of the pendulum, g = acceleration due to gravity of the planet, π = pi

From the question, we were asked to  find the value of g,

There we make g the subject of the equation

g = 4π²L/T²..................... Equation 2

Given: L= 48 cm = 0.48 m, T = (141/93) s = 1.516 s

Constant: π = 3.14

Substitute these values into equation 2

g = 4(3.14²)(0.48)/(1.516²)

g = 18.93/2.298

g = 8.24 m/s².

Hence the acceleration of the planet is 8.24 m/s²

Answer:

electromagnet

Explanation:

Magnet

.....

Answer:

c. -288 J

Explanation:

Given;

mass of the block, m = 4 kg

velocity of the block, v = 12 m/s

deceleration of the block, a = 3 m/s²

Apply work-energy theorem;

work done in stopping the block = kinetic energy of the block

W = ¹/₂mv²

where;

W is the magnitude of the work done by the force

W = ¹/₂ x 4 x 12²

W = 288 J

Since the work done by the force is in opposite direction, then the value of the work done by the force is -288 J

The devices don't "draw" 120v. The 120v comes to your house from the power company. They decide it should be 120v and that's what they send you. It's hypothetically technically possible for you to change that, but if you try it, you'll definitely burn the house down.

The total resistance of those two devices in parallel is 6 and 2/3 ohms. That doesn't depend on what they're plugged into. It would still be 6 and 2/3 ohms if they were connected in parallel, wrapped in tissue, sealed in a jar of chicken soup and stored in a box on a high shelf.

But since they ARE plugged into 120v, they draw 18 Amperes from the socket, and they turn all of that electrical energy into 2160 watts of heat. That's about the same as a good size toaster oven, and you have to figure out a way to get rid of all that heat before you burn the house down.