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Anna11 [10]
4 years ago
9

Unlike fireflies and glow worms, most objects don't make their own light. So how can you see what's around you?

Physics
1 answer:
VashaNatasha [74]4 years ago
5 0
Light reflects off the cornea in the back of your eye thats what makes you see light 
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Are you referring the term Amplitude.
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4 years ago
Pwease help me with thesse three
DiKsa [7]

Answer:

1. Spring

2. 23.5

3. Summer

7 0
3 years ago
Two cars are traveling at the same speed of 27 m/s on a curve thathas a radius of 120 m. Car A has a mass of 1100 kg and car B h
Lera25 [3.4K]

Answer:

a_{cA} = 6.075  m/s²

a_{cB} = 6.075  m/s²

F_{cA} = 6682.5 N

F_{cB} = 9720 N

Explanation:

Normal or centripetal acceleration measures change in speed direction over time. Its expression is given by:

a_{c} = \frac{v^{2} }{r}  Formula 1

Where:

a_{c} : Is the normal or centripetal acceleration of the body  ( m/s²)

v: It is the magnitude of the tangential velocity of the body at the given point

.(m/s)

r: It is the radius of curvature. (m)

Newton's second law:

∑F = m*a Formula ( 2)

∑F : algebraic sum of the forces in Newton (N)

m : mass in kilograms (kg)

Data

v_{A} = 27 \frac{m}{s}

v_{B} = 27 \frac{m}{s}

m_{A} = 1100 kg

m_{B} = 1600 kg

r= 120 m

Problem development

We replace data in formula (1) to calculate centripetal acceleration:

a_{cA} = \frac{(27)^{2} }{120}

a_{cA} = 6.075  m/s²

a_{cB} = \frac{(27)^{2} }{120}

a_{cB} = 6.075  m/s²

We replace data in formula (2) to calculate  centripetal  force Fc) :

F_{cA} = m_{A} *a_{cA} = 1100kg*6.075\frac{m}{s^{2} }

F_{cA} = 6682.5 N

F_{cB} = m_{B} *a_{cB} = 1600kg*6.075\frac{m}{s^{2} }

F_{cB} = 9720 N

4 0
4 years ago
2. Starting from the origin, a person walks 4 km east during first day, and 7 km west the
Artemon [7]
The total distance is 4 + 7 = 11 Km
6 0
3 years ago
PLEASE HELP MEEE!! I WILL MARK YOU AS BRAINLIEST AND EVERYTHING!! THIS IS DUE TODAY AND MY GRADES ARE AT STAKE!:(
irina [24]

Answer:

They will be 140 miles apart 8 hours after the first boy started the trip or 6 hours after the second boy started the trip.

Explanation:

x = the time that the first boy travels at 14 mph

x - 2 = the time the second boy travels at 14 mph

140 the distance between them

Since one travels north and the other east (their roads are perpendicular) the distance between them can be calculated using Pythagorean Theorem

(14*x)^2 + ((x-2)*14)^2 = 140^2

the solutions of the quadratic equation are

x1 = - 6 is not the solution since x > 0

x2 = 8 h is the solution

3 0
3 years ago
Read 2 more answers
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