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3 years ago

You travel at a speed of 24 m/s. How much time will it take you to travel 127m (round to two decimal places if needed)

Physics

1 answer:

shtirl [24]3 years ago

4 0

Answer: 5.29 seconds

Explanation:

if the speed is 24 meters per second than it would take you 5.29 seconds or 127meters/24m/s to get 5.29s

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A uniform electric field (constant in magnitude and direction) exists in the region between two oppositely charged plane paralle

Over [174]

Answer:

Part a)

$E = 39.7 N/C$

Part b)

$v_f = 1.10\times 10^4 m/s$

Explanation:

Part a)

Proton is released from one plate and strike at other plate in time

$t = 2.90 \times 10^{-6} s$

$d = 1.60 cm$

now we will have

$d = \frac{1}{2}at^2$

$0.0160 = \frac{1}{2}a(2.90 \times 10^{-6})^2$

$a = 3.8 \times 10^9 m/s^2$

now we know that

$a = \frac{qE}{m}$

$3.8 \times 10^9 = \frac{(1.6 \times 10^{-19})E}{(1.67 \times 10^{-27})}$

$E = 39.7 N/C$

Part b)

Speed of the proton when it strike the other plate can be calculated by kinematics equations

$v_f^2 - v_i^2 = 2ad$

$v_f^2 - 0 = 2(3.8 \times 10^9)(0.0160)$

$v_f = 1.10\times 10^4 m/s$

4 0

3 years ago

Astronomers know that the distance between the Earth and the Sun averages 1.50 x108 km. How can astronomers use the observed ste

rodikova [14]

Answer:

The distance of stars and the earth can be averagely measured by using the knowledge of geometry to estimate the stellar parallax angle(p).

From the equation below, the stars distances can be calculated.

D = 1/p

Distance = 1/(parallax angle)

Stellar parallax can be used to determine the distance of stars from an observer, on the surface of the earth due to the motion of the observer. It is the relative or apparent angular displacement of the star, due to the displacement of the observer.

Explanation:

Parallax is the observed apparent change in the position of an object resulting from a change in the position of the observer. Specifically, in the case of astronomy it refers to the apparent displacement of a nearby star as seen from an observer on Earth.

The parallax of an object can be used to approximate the distance to an object using the formula:

D = 1/p

Where p is the parallax angle observed using geometry and D is the actual distance measured in parsecs. A parsec is defined as the distance at which an object has a parallax of 1 arcsecond. This distance is approximately 3.26 light years

3 0

3 years ago

Define the refraction index of a

Andrews [41]

Answer:

see below

Explanation:

refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in medium

critical angle of glass is 42 means that if the angle of incidence inside the glass is 42 degrees, then the angle of refraction in the optically less dense medium will be 90 degrees

hope this helps

6 0

3 years ago

Why is a pencil bent when bent in water

wel

Answer:

Refraction

Explanation:

A pencil bends when it enters the water media due to the phenomenon of refraction.

Refraction is one of the properties of waves.
Refraction of light occurs which it crosses from a region having different density values.
Water is denser than air.
As light moves from air to wave it becomes refracted

5 0

3 years ago

NO LINKS! ASAP PLEASE *FOR TEST TOMORROW*

denis23 [38]

Answer:

Friction: When two surfaces slide against each other / make contact with each other

Force: A push or pull exerted on an object

8 0

3 years ago