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Ghella [55]
3 years ago
13

Field lines point straight out from all sides of an object. Which statement best describes the object?

Physics
2 answers:
Mashcka [7]3 years ago
8 0
It is positively charged.
Kay [80]3 years ago
7 0

Answer:

it is positively charged

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kogti [31]
Starting making jokes and rapping
5 0
3 years ago
A cheetah runs 5 miles in 60 seconds. How fast did the cheetah run in MILES per HOUR? Convert seconds into hours first, then sol
Vinil7 [7]

Answer:

300 miles per hour

Explanation:

Speed is distance per unit time, expressed as s=d/t where t is the time taken, d is distance covered and s is the speed.

Convering s to hrs

To convert seconds to hours, we knkw that 1 hour has 60 minutes and each minute has 60 seconds. Therefore, 1 hour has 60*60=3600 seconds

If 3600s=1 h

60 s=?

By cross multiplication 60s*1 h/3600s=1/60 hours

Given distance as 5 miles and time as 1/60 hours then the speed will be 5 divided by 1/60 hrs which is equivalent to 5*60=300 miles per hour

6 0
3 years ago
You are sitting on a deck of your house surrounded by oak trees. You hear the sound of an acorn hitting the deck. You wonder if
Black_prince [1.1K]

Answer: 96N

Explanation:

To calculate the velocity of the impact On the persons head, we have

h = gt²/2

14 = 9.81t²/2

t² = 28/9.8

t² = 2.86

t = 1.69s

V = u + at

V = 0 + 9.81*1.69

V = 16.58m/s

a(average) = (v1² + v2²) /2Δy

a(average) = 16.58² + 0)/2 * 0.005

a(average) = 274.8964/0.01

a(average) = 27489.64m/s²

Using newton's second law of motion,

F(average) = m * a(average)

F(average) = 0.0035 * 27489.64

F(average) = 96.21N

Therefore the force needed by the acorn to do much damage starts from 96N

8 0
3 years ago
I need help with this Physics question!
just olya [345]
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7 0
3 years ago
A helicopter flies 168 miles against the wind in 2 hours; with the wind, it can fly 252 miles in the same amount of time. find t
posledela

Let v_h be the speed of the helicopter in still air. Let v_w be the speed of the wind. Then, from the given information,

(v_h-v_w)2=168\\ (v_h+v_w)2=252\\

Adding the above 2 equations,

4v_h=168+252\\ 4v_h=420\\ v_h=105

The speed of the helicopter in still air 105 \;mi/hour

6 0
3 years ago
Read 2 more answers
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