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1 year ago

suppose you are hiking along a trail. make a comparison between the magnitude of your displacement and your distance traveled.

1 answer:

8 0

The magnitude of your displacement can be less than your distance traveled And The magnitude of your displacement can be equal to your distance traveled.

Magnitude in physics is simply described as "distance or quantity." It shows the size or direction that an object moves in either an absolute or relative sense. A force's magnitude is defined as the total amount of forces operating on an item. The strength of the force grows if every force is exerting itself in the same direction. The magnitude of the force diminishes when forces are applied to an object from various angles. Meters per second squared is the unit used to measure acceleration. The units must account for both variables since acceleration deals with both velocity and time. The object's current speed is represented by the magnitude of the velocity vector. The velocity vector is pointed in the same general direction as the object's motion. Multiply the constant acceleration rate by the time difference to determine the magnitude of the velocity at any given moment, and then add that value to the beginning velocity.

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if one of the classic nuclear physics experiments at the beginning of the 20th century an alpha particle was accelerated toward

nignag [31]

Answer:

r=4.55 x 10^-14 m

Explanation:

Identify the unknown:

How close to the gold nucleus could alpha particles come before being deflected?

List the Knowns:

Charge of alpha particle: Q_1 = 2 x 1.6 x 10^-19 C

Energy of alpha particle: K.E = 4.5 x 10^6 eV = 5 x 10^6 x 1.6 x 10^-19 J

Charge of gold nucleus: Q_2 = 79 x 1.6 x 10^-19 C

Electric force constant: k = 9 x 10^9 N • m^2/c^2

Set Up the Problem:

The alpha particles will be repelled by the gold nucleus and it will approaches until all its kinetic energy transformed into electrical potential energy. so at this distance from the gold nucleus, potential energy equals KE

Potential energy of a two-charge system:

U(r)=k*Q_1*Q_2/r

r=k*Q_1*Q_2/ U

Solve the Problem:

r=4.55 x 10^-14 m

6 0

3 years ago

A coin rests 11.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface i

9966 [12]

Answer:

5.5 rad/s

Explanation:

The friction between the coin and the turntable provides the centripetal force that keeps the coin in circular motion. Therefore, we can write:

$\mu mg = m\omega^2 r$

where

$\mu = 0.340$ is the coefficient of friction

m is the mass of the coin

$g=9.8 m/s^2$ is the acceleration of gravity

$\omega$ is the angular speed

r is the distance of the coin from the centre of rotation

In this problem,

r = 11.0 cm = 0.11 m

The coin starts to slip when the centripetal force becomes larger than the maximum frictional force:

$m\omega^2 r > \mu m g$

Solving for $\omega$ , we find the angular speed at which this happens:

$\omega = \sqrt{\frac{\mu g}{r}}=\sqrt{\frac{(0.340)(9.8)}{0.11}}=5.5 rad/s$

5 0

3 years ago

Amplitude is a measure of a waves

ryzh [129]

Amplitude is a measure of distance of waves

Answer: Option B

Explanation:

Waves are usually represented in terms of frequency and amplitude. Amplitude refers to the distance or maximum displacement traveled by the waves in terms of time which is denoted by frequency.

Frequency can be defined as the number of cycles travelled per second whereas speed is the distance travelled by the wave per second. Hence distance is the right option from the other given options.

4 0

4 years ago

assuming 100% efficient energy conversion how much water stored behind a 50 centimeter high hydroelectric dam would be required

Nataly [62]

Answer:

The amount of water that will power a battery with that rating = 7.35 m³

Explanation:

The power rating for the battery is missing from the question.

Complete Question

Assuming 100% efficient energy conversion how much water stored behind a 50 centimeter high hydroelectric dam would be required to charged the battery with power rating, 12 V, 50 Ampere-minutes

Solution

Potential energy possessed by water at that height = mgH

m = mass of the water = ρV

ρ = density of water = 1000 kg/m³

V = volume of water = ?

g = acceleration due to gravity = 9.8 m/s²

H = height of water = 50 cm = 0.5 m

Potential energy = ρVgH = 1000 × V × 9.8 × 0.5 = (4900V) J

Energy of the battery = qV

q = 50 A.h = 50 × 60 = 3,000 C

V = 12 V

qV = 3,000 × 12 = 36,000 J

Energy = 36,000 J

At a 100% conversion rate, the energy of the water totally powers the battery

(4900V) = (36,000)

4900V = 36,000

V = (36,000/4900)

V = 7.35 m³

Hope this Helps!!!

4 0

4 years ago

What effort force must be applied to lift an 864 N load with a fixed pulley?

yKpoI14uk [10]

Answer:

864N (B)

Explanation:

Using newtons first law of motion: ∑F = 0

F(gravity) - F(applied) = 0

F(gravity) = F(applied) = 864N

5 0

3 years ago