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3 years ago

PLEASE HELP URGENT!!!!!!!!!!!!!

Physics

1 answer:

Nimfa-mama [501]3 years ago

4 0

c i think sorry if wrong

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A rocket burns fuel as it shoots into the sky. What happens to the mass and volume of the rocket?

diamong [38]

Answer:

mass goes down volume remains the same

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2 years ago

A force of 100 N acts upward. Resolve this force into 2 components; one that acts 30º north of west and one that acts 60º north

GrogVix [38]

To resolve these forces we have to make use of the sines and cosines.

To resolve this force in 30 degree north of west, the answer will be

100*sin(30)

The answer will be 50N

Now to resolve the force acting 60 degree north of east

100* cos(60)

The answer will be 50N.

This also adds to the total force acting that is 50+50=100N. This is the way forces are resolved according to their specified angles.

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2 years ago

Calculate the maximum absolute uncertainty for R if:

Radda [10]

Answer:

ΔR = 9 s

Explanation:

To calculate the propagation of the uncertainty or absolute error, the variation with each parameter must be calculated and the but of the cases must be found, which is done by taking the absolute value

The given expression is R = 2A / B

the uncertainty is ΔR = | $\frac{dR}{dA}$ | ΔA + | $\frac{ dR}{dB}$ | ΔB

we look for the derivatives

$\frac{dR}{dA}$ = 9 / B

$\frac{dR}{dB}$ = 9A ( $- \frac{1}{B^2 }$ )

we substitute

ΔR = $\frac{9}{B}$ ΔA + $\frac{9A}{B^2}$ ΔB

the values are

ΔA = 2 s

ΔB = 3 s

ΔR = $\frac{9}{11}$ 2 + $\frac{9 \ 32}{11^2 }$ 3

ΔR = 1.636 + 7.14

ΔR = 8,776 s

the absolute error must be given with a significant figure

ΔR = 9 s

3 0

3 years ago

Select the correct answer.

MariettaO [177]

Answer:

can't explain but is correct

7 0

3 years ago

Every 6 seconds a pendulum completes 1 cycle. What are the period and frequency of this pendulum?

Kruka [31]

Multiply 6 x 60 to get the frequency.

8 0

3 years ago