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4 years ago

How is a scientific theory different from a hypothesis?

1 answer:

7 0

A scientific theory is different from a hypothesis because a theory is a educated guess that is being worked on and proven correct and a hypothesis is a educated guess it is a guess that needs to be proven.

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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

Calculate the p.e. of a 5 kg mass when it is (i) 3 m, (ii) 6 m, above the ground. (g = 10 N/kg)

Mashcka [7]

Explanation:

P.E=MGH

(1) P.E=5×10(G)×3

= 150 kg m^/s^ ( ^ =sqaure)

(2) P.E=5×10×6

= 300 kg m^/s^

Hope it helps, just remember the formula u can solve any question regarding gravition of earth (P.E=Mgh)

4 0

3 years ago

The velocity of a ball as it is thrown up is 20 meters/second. It attains zero velocity after 3.5 seconds. What is the average a

Step2247 [10]

Change in speed = (speed at the end) minus (speed at the beginning)

= (0 - 20 m/s) = -20 m/s

Acceleration = (change in speed) / (time for the change)

= (-20 m/s) / (3.5 sec) = -5.71 m/s²

Notice that this story probably didn't happen on Earth, because
the acceleration due to gravity on Earth is 9.8 m/s².

3 0

3 years ago

A person pushes a 25kg box across a horizontal frictionless surface with a force of 200 Newtons.

inna [77]

Second law of physics. F = MA
200 = 25A
I believe you are capable of doing the rest

6 0

3 years ago

Sound waves can be modeled by the equation of the form y=20sin(3t+theta). Determine what type of interference results when sound

Mariulka [41]

Answer:

go to the link quizzlet it will give you tha answer

Explanation:

4 0

3 years ago