A spaceship takes off vertically from rest with an acceleration of 28.5 m/s^2
.
a) What magnitude of force (in Newtons) is exerted on a 59.0 kg astronaut during takeoff?
b) Express this force as a multiple of the astronaut's weight on Earth?

The boll's position is -2 m.

Displacement of a body is defined as change is position of the body with respect to certain point (origin) in certain direction. Due to having both magnitude and direction, it is a vector quantity. SI unit of displacement is meter.

According to the question,

Initial position of the ball with respect to the origin = +5 m.

displacement of the ball (ball moves) = -7 cm.

Then, final position of the ball = initial position + displacement.

= (+5 cm) + (-7 m).

= (5 - 7) m.

= -2 m.

Hence, the final position of the ball will be -2 m.

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Answer:

Independent Variable

Explanation:

The variables that are plotted on X-axis, the horizontal line of the graph are termed as independent variables. The variables plotted on Y-axis which is vertical side of the graph are dependent variables.

Explanation:

1A. The visible light portion of the electromagnetic spectrum shows the rainbow of colors, with violet and blue having shorter wavelengths, and therefore higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy.

so its option 2

2A. Atom and molecules

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Answer:

how much?

Explanation:

The car will skid to a stop after traveling approximately 80.5 meters.

To solve this problem, we can use the work-energy theorem and the equation for friction. The work done by the frictional force is equal to the change in kinetic energy of the car:

The work done by the frictional force is equal to the force of friction times the distance traveled:

The force of friction is equal to the coefficient of friction times the normal force, which is equal to the weight of the car:

Substituting these equations and solving for d, we get:

where K_i is the initial kinetic energy of the car, which is equal to (1/2) * m * v², and K_f is the final kinetic energy of the car, which is equal to 0.

Plugging in the given values, we get:

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Answer:

decreases

Explanation:

halves and the speed remains unchanged.

Answer

:Fold mountains are often associated with continental crust. They are created at convergent plate boundaries, sometimes called continental collision zones or compression zones. Convergent plate boundaries are sites of collisions, where tectonic plates crash into each other.

E=hc/λ = 1.91 × 10^6

J = (6.626*10^-34) (3.00*10^8) / λ

λ= (6.626*10^-34) (3.00*10^8) / 1.91 × 10^6 J

λ= 1.0410^-31 10^-9 *6.022*10^23 = 62. 8 nm

Answer:

GPE= h a m

GPE= (2)(9.8)(5)

GPE=98 J

Answer:

The magnetic pull strength is measured by using the calibrated scale and a ferrous test piece to determine the breakaway force, typically measured in pounds or ounces. (I don't take credit for this answer)

Explanation:

From the first floor to the fourth floor, the elevator's net work during the entire trip is -3mgh.

Given,

On the first floor of a building, an elevator with mass m is initially at rest. It ascends at a constant speed, passing second and third floors before coming to a stop at the fourth floor.

the separation between the floors is h

The distance from the first floor to the fourth floor Equals 3 hours of work = -mg(3 hours)

= -3mgh

Work Done = -3mgh

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here's the solution : -

we know, kinetic energy (k.e) =

\( \dfrac{1}{2} mv { }^{2} \)

where,

So,

=》

\(100 = \dfrac{1}{2} \times 0.5 \times {v}^{2} \)

=》

\( \dfrac{100 \times 2}{0.5} = {v}^{2} \)

=》

\( \dfrac{2000}{5} = {v}^{2} \)

=》

\(400 = {v}^{2} \)

=》

\(v = \sqrt{400} \)

=》

\(v = 20\: \: ms {}^{ - 1} \)

Answer: stop the experinment and begin again sometimes the result of the experiment may give you unexpected results due to the fact that you may have missed a certain step or you didn't follow the procedure accurately to the dot, hence it's important to redo the experiment and see if every step was followed accurately before you can discard the results or change the procedure.

Explanation:

Answer:

d

Explanation:

The force on a charged particle on a magnetic field is given by:

where B is the magnitude of the field, q is the charge of the particle, v is its velocity and θ is the angle between the field and the velocity of the particle.

In this case we have that:

• The magnitude of the field is 0.09 T.

• The charge of the particle is 3.2 x 10 –19C .

• The velocity is  3.0 × 10 4 m/s

• The angle between the field and the velocity is 90°, since they are perpendicular.

Plugging these we have:

Therefore, the force on the charge is:

The stone will strike the ground after approximately 8 seconds.
To solve this problem, we can use the equation of motion for a freely falling object:
h = v₀t - 1/2gt²

Where h is the height of the object at time t, v₀ is the initial velocity, g is the acceleration due to gravity (32.2 feet per second squared), and t is the time elapsed.

At the highest point of its trajectory, the stone's velocity will be zero. Therefore, we can use the given initial velocity to find the time it takes for the stone to reach its maximum height:

v₀ = 96 feet per second
h = 265 feet
t₁ = v₀/g = 96/32.2 = 2.98 seconds

After this, the stone will fall back to the ground. We can use the same equation of motion to find the time it takes to reach the ground:

h = 0 (ground level)
v₀ = -96 feet per second (negative because it is in the opposite direction of the initial velocity)
t₂ = sqrt(2h/g) = sqrt(2(265)/32.2) = 4.01 seconds

The total time it takes for the stone to strike the ground is the sum of the time it takes to reach the maximum height and the time it takes to fall back to the ground:

t = t₁ + t₂ = 2.98 + 4.01 = 6.99 seconds

Rounding to the nearest whole number, we get that the stone will strike the ground after approximately 8 seconds.

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Answer: Around 433 miles

Explanation:

Answer: time is inversely proportional to acceleration and free-falling bodies have acceleration.

Explanation:

according to the first equation of motion ;

a=V-v/t

where V is the final velocity and v is the initial velocity. putting the value of a as g we get;

g=V-v/t

shows the relation of g and t(gravitational acceleration and time) of free-falling bodies.

a. The impulse acting on the car is 7.4×10³ N⋅s

b. The new impulse acting on the car is −7.4×10³ N⋅s.

c. The average force is 2.3×10³ N.

d. the new average force is 2.1×10⁴ N.

Let the initial and final momentum of the car be pi =mνi and pf =m νf, respectively. The impulse on it equals the change in its momentum, J =Δ p = pf − pi =m(νf − νi ). The average force over the duration Δt is given by  Favg = J /Δt.

(a) The initial momentum of the car is pi =m νi =(1400kg)(5.3m/s)j^ =(7400 kg⋅m/s) j^ and the final momentum after making the turn is pf​ =(7400 kg⋅m/s) i^.

Thus, the impulse is, J = pf − pI  =(7.4×10³ N⋅s)( i^ − j^ ) .

(b) The initial momentum of the car after the turn is pi'  =(7400 kg⋅m/s) i^  and the final momentum after colliding with a tree is p f′ =0.

The impulse acting on it is J′ = pf′ − pi′ =(−7.4×10³ N⋅s) i^.

(c) the average force on the car during the turn is Favg = ΔtxΔ p = ΔtxJ = 4.6s(7400⋅m/s)( i^ − j^ ) =(1600N)( i^ − j^ ) and its magnitude is Favg​=(1600N) 2 =2.3×10³ N .

(d) The average force during the collision with the tree is Favg′​ = ΔtxJ'  = 350×10 −3 s(−7400 kg⋅m/s) i^ =(−2.1×10⁴ N) i^ and its magnitude is  F  avg′

=2.1×10⁴ N.

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the right answer of the question is true

Answer:

13.5 m

Explanation:

Given:

v₀ = 0 m/s

v = 9 m/s

a = 3 m/s²

Find: Δx

v² = v₀² + 2aΔx

(9 m/s)² = (0 m/s)² + 2 (3 m/s²) Δx

Δx = 13.5 m

Answer:

This process is CONDENSATION

Explanation:

Condensation occurs when water vapour loses some of its kinetic energy to a colder body and changes into liquid state.

Definition: When an object moves in a circular path with uniform speed, the motion is called uniform circular motion.

ac=rv2=ω2r

Answer:She can increase the number of wire loops

Explanation: When the number of loops of wire ( usually around the iron ) increases, the strength of the electromagnet is increased.

According to the equation

B=μ₀ N I

Where

μ₀ = permeability of the core

N= Number of turns of the coil

I= Current flowing through the coil

From the equation above , we can see that The strength of an electromagnet depends the amount of current, no of turns of coil and the permeability  core of coil. we can now say that Increasing the  number of wire loops  increases the strength of electromagnet.

Therefore, Lisa should increase the number of wire loops to increase the strength of the electromagnet

Answer:

C

Explanation:

Edge2021

Answer:

Purple Car and Black Car

Explanation:

Have to be moving in acceleration to have acceleration, being at a constant speed isn't moving.

Answer:

1. b

2. e

3. a

4. c

5. d

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Infrared wave basically have shorter wavelengths than X-rays. The correct option is A.

A section of the electromagnetic radiation spectrum with wavelengths ranging from roughly 700 nanometers (nm) to one millimetre is known as infrared radiation (IR), or simply infrared (mm).

While shorter than radio waves, infrared waves are longer than visible light waves.

Infrared radiation has the ability to ease muscle tension and encourage local blood circulation.

Infrared radiation has been used in conventional medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

Infrared waves are shorter than radio waves but longer than visible light waves.

Thus, the correct option is A.

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Answer:

1.5 m/s²

Explanation:

Applying,

a = (v-u)/t ...................... Equation 1

Where a = acceleration of the particle, v =  final velocity of the particle, u = Initial velocity of the particle, t = time.

From the question,

Given: u = 0 m/s (From rest), v = 15 m/s, t = 10 seconds

Substitute these values into equation 1

a = (15-0)/10

a = 15/10

a = 1.5 m/s²