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2 years ago

What is likely to happen to a rocket that takes off at a slow speed?

2 answers:

7 0

Answer: if a rocket in a fast speed is launched from the surface of the Earth, it needs to reach a speed of at least 7.9 kilometers per second (4.9 miles per second) in order to reach space, if it takes off at a slow speed, the kilometers and miles of speed would decrease poorly and well, I’m not sure but the rocket is probably just gonna crash

Explanation:

Vladimir [108]2 years ago

3 0

The rocket will crash

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I'm looking for the answers for 4-6 and how to do them. I have some answers already but I'm very unsure of them. Thank you!

coldgirl [10]

Answer to 4: E

Answer to 6: D

7 0

3 years ago

A wall clock has a minute hand with a length of 0.55 m and an hour hand with a length of 0.26 m. Take the center of the clock as

Lemur [1.5K]

Answer:

The magnitude of the acceleration of the tip of the minute hand of the clock $1.675\times10^{-6}\ m/s^2$ .

Explanation:

Given that,

Length of minute hand = 0.55 m

Length of hour hand = 0.26 m

The time taken by the minute hand to complete one revelation is

$T= 3600\ sec$

We need to calculate the angular frequency

Using formula of angular frequency

$\omega=\dfrac{2\pi}{T}$

Put the value into the formula

$\omega=\dfrac{2\pi}{3600}$

$\omega=0.001745\ rad/s$

We need to calculate the magnitude of the acceleration of the tip of the minute hand of the clock

Using formula of acceleration

$a=r\omega^2$

Put the value into the formula

$a=0.55\times(0.001745)^2$

$a=1.675\times10^{-6}\ m/s^2$

Hence, The magnitude of the acceleration of the tip of the minute hand of the clock $1.675\times10^{-6}\ m/s^2$ .

3 0

2 years ago

Did the bigbang violate the law of conservation of energy and matter?

Pie

Under general relativity, there is no 'before the Big Bang'. The problem is that time is itself a part of the universe and is affected by matter and energy. Because of the huge densities just after the Big Bang, time itself is warped in such a way that it cannot go back before that event. It is somewhat like asking what is north of the north pole.

The conservation of matter and energy states that the total amount of mass and energy at one time is the same at any other time. Notice how time is a crucial part of this statement. To even talk about conservation laws, you have to have time.

The upshot is that the Big Bang did not break the conservation laws because time itself is part of the universe and started at the Big Bang and because the conservation laws need to have time in their statements.

3 0

3 years ago

Sometimes in the winter, ice crystals grow directly from the moisture in the air. As the water changes from a gas to a solid, th

mrs_skeptik [129]

Answer: B. slow down as they lose energy

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3 years ago

Describe how a neutral material becomes attracted to a negatively charged object brought near it.

Naddik [55]

Answer:

Electric force

Explanation:

It’s like static stuff

3 0

2 years ago