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xxTIMURxx [149]
3 years ago
6

I need help with question 4

Physics
1 answer:
stellarik [79]3 years ago
5 0
See if it’s answer A
You might be interested in
Salma is riding her bicycle. She rides 25.6 kilometers in 4 hours. What is her speed?
Musya8 [376]

Answer:

6.4 kilometers per hour

Explanation:

Just do the amount of distance she covers divided by how many hours she rides to get the answer. In this case, its 25.6 divided by 4 which equals 6.4

3 0
3 years ago
If two measurements are very close to each other, then they are ____.
dimaraw [331]
I'd say b, precise, here.
If there's an error somewhere in the experiment or project, then it is consistently .... wrong. So, just 'cos you measure something precisely, it doesn't mean that you've measured it accurately. Maybe an example would be a measurement of length. If you used a metal ruler at zero degrees C, you can measure to say half a millimetre. A series of measurements of the same object would give very similar readings. But, if you used same metal ruler at, say 100 celsius (implausible) then you'd probably get a different set of readings. 'cos of the expansion of the metal ruler.
4 0
3 years ago
Read 2 more answers
I NEED HELP ASAP!!!!!
Ratling [72]

Answer:

D) momentum of cannon + momentum of projectile= 0

Explanation:

The law of conservation of momentum states that the total momentum of an isolated system is constant.

In this case, the system cannon+projectile can be considered as isolated, because no external forces act on it (in fact, the surface is frictionless, so there is no friction acting on the cannon). Therefore, the total momentum of the two objects (cannon+projectile) must be equal before and after the firing:

p_i = p_f

But the initial momentum is zero, because at the beginning both the cannon and the projectile are at rest:

p_i = 0

So the final momentum, which is sum of the momentum of the cannon and of the projectile, must also be zero:

p_f = p_{cannon}+p_{projectile} =0

6 0
4 years ago
Other than the depth and the atmospheric pressure, state one quantity that affects the
Hunter-Best [27]

Answer:

density

Explanation:

pressure within a liquid a liquid only depends on the density of the liquid,the acceleration due to gravity, and the depth within the liquid

7 0
3 years ago
Which of these is equivalent to the law of conservation of energy?
zalisa [80]
The answer is D.
C and A are incomplete as they only treat specific types of energy, and B doesn't answer the question.
7 0
4 years ago
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