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vampirchik [111]
3 years ago
11

You are cycling around a circular track at a constant speed. Does the magnitude of your acceleration change? The direction?

Physics
1 answer:
konstantin123 [22]3 years ago
3 0

Answer: A) The magnitude and direction of the acceleration change.

Explanation:

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A 2.5 kg stone is released from rest and falls toward Earth. After 4.0 s, magnitude of its momentum in kg.m/s is :
11111nata11111 [884]

Answer:

B

Explanation:

momentum = mass * velocity

velocity = initial speed + acceleration * time where initial speed =0, acceleration = 9.81, time = 4

8 0
3 years ago
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At what age is a child likely to learn to sit up without support?
Gemiola [76]

Answer by YourHope:


Hi! ^-^


At what age is a child likely to learn to sit up without support?


I would say Five months if you position the child but Nine months for the baby to sit up by themselves! So the answer is Nine months!


Have a BEAUTIFUL day~

4 0
3 years ago
A 2.9 gram bullet is shot into a tree stump. It enters at a velocity of 304 m/sec and comes to rest after having penetrated the
Helga [31]
First convert grams to kilograms (so that the answer will be N) 1000g=1kg so 2.9g=.0029kg.

To solve for force we use the equation F=ma, so we need to find acceleration (a) .Next use the equation a=Δv/Δt. Δt is given as being .00043 seconds. Δv is the difference in velocities - final minus initial (this is important to discern the direction of the force vector); 0-304=-304. Now plugin and solve for a. The result is -706976.7442 m/s², or -710000 m/s² if you are using significant figures. 

Now use the values for mass and acceleration to solve for force. F=ma=-2050.232558N or F=- 2100N (if you are using significant figures).
7 0
4 years ago
Why should a glass slide and a coverslip be held by the edges?
AleksAgata [21]
THIS IS NOT THE EXACT ANSWER BUT IT MIGHT HELP
The cover slips serves two purposes: (1) it protects the microscope's objective lens from contacting the specimen, and (2) it creates an even thickness (in wet mounts) for viewing.
8 0
3 years ago
E20E20: The word “virtual” refers to something that exists in effect but not in actual fact. How does this definition relate to
Lubov Fominskaja [6]

The correct answer (sample response) is:

The image seems to be behind the mirror, but nothing is really there.

Include the following in your response:

The image appears to be behind the mirror.

If someone looks behind the mirror, there is no image there.

|Huntrw6|

5 0
3 years ago
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