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kakasveta [241]
3 years ago
5

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.

Physics
2 answers:
Reptile [31]3 years ago
3 0
0 because he did not change his position where he was in the beginning
olya-2409 [2.1K]3 years ago
3 0

Answer:

0

Explanation:

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A parachutist's fall to Earth is determined by two opposing forces. A gravitational force of 605 N acts on the parachutist. Afte
Doss [256]

Answer:15.8 m/s

Explanation:

Given

Gravitational Force F_g=605 N

Air resistance F_d=689 N

mass of Parachutist =\frac{605}{9.8}=61.73 kg

Velocity after 3 s

v=u+at

v=0+9.8\times 3

v=29.4 m/s

Now Parachutist opens the parachute

Net for on Parachutist

605-689=-84

84 N drag force

therefore deceleration \frac{84}{61.73}=1.36 m/s^2

velocity after 10 s is

v_1=v+at

v_1=29.4-1.36\times 10

v_1=15.8 m/s

7 0
4 years ago
Which of these quantities needs to have a direction associated with it? Select one: a. force only b. force and acceleration c. m
ehidna [41]
B) force & acceleration
6 0
3 years ago
A ball with 5j of GPE falls to the ground. What is the KE of the ball at the moment it hits the ground
schepotkina [342]

Answer:

6j

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7 0
3 years ago
Katie and Mark sit next to one another in class. She has a mass of 40 kg and his mass is 65 kg.
OlgaM077 [116]
A :-) for this question , we should apply
F = GMm by d^2
( For making the calculation easy , first remove the decimals )
Given : G = 6.7 x 10^-11 Nm^2 / kg^2
= 67 x 10^-12 Nm^2 / Kg^2
M = 65 kg
m = 40 kg
d = 0.5 m
Solution -
F = GMm by d^2
F = 67 x 10^-12 x 65 x 40 by 0.5 x 0.5
F = 4355 x 40 x 10^-12 by 0.25
F = 174200 x 10^-12 by 0.25
F = 696800 x 10^-12

.:. The Gravitational force between mark and Katie is 696800 x 10^-12
6 0
3 years ago
Which of the following gives good evidence for the particle nature of EM radiation?
k0ka [10]

One phenomenon which well presents the idea of wave particle duality is the photoelectric effect.

<h3>What is wave particle duality?</h3>

The term wave particle duality has to do with the fact that a wave can behave sometimes as a wave and sometimes as a particle. This was well established by the work of De Broglie.

One phenomenon which well presents the idea of wave particle duality is the photoelectric effect.

Learn more about wave particle duality:brainly.com/question/14953274

#SPJ1

6 0
2 years ago
Read 2 more answers
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