1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
m_a_m_a [10]
3 years ago
6

What is the measurement of 29.46 cm, when rounded to three significant figures?

Physics
1 answer:
bezimeni [28]3 years ago
7 0
29.5cm is the answer
You might be interested in
Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. The scale reads 830 N for the first 3.8 s after the eleva
Delicious77 [7]

Answer:

v= 4.0 m/s

Explanation:

  • When standing on the bathroom scale within the moving elevator, there are two forces acting on Henry's mass: Normal force and gravity.
  • Gravity is always downward, and normal force is perpendicular to the surface on which the mass is located (the bathroom scale), in upward direction.
  • Normal force, can adopt any value needed to match the acceleration of the mass, according to Newton's 2nd Law.
  • Gravity (which we call weight near the Earth's surface) can be  calculated as follows:

       F_{g} = m*g = 95 kg * 9.8 m/s2 = 930 N (1)

  • According to Newton's 2nd Law, it must be met the following condition:

       F_{net} = F_{g} -F_{n} = m*a\\  F_{net} = 930 N - 830 N = 100 N = 95 Kg * a

  • As the gravity is larger than normal force, this means that the acceleration is downward, so, we choose this direction as the positive.
  • Solving for a, we get:

       a =\frac{F_{net} }{m} =\frac{100 N}{95 kg} =  1.05 m/s2

  • We can find the speed after the first 3.8 s (assuming a is constant), applying the definition of acceleration as the rate of change of velocity:

        v_{f} = a* t = 1.05 m/s * 3.8 m/s = 4.0 m/s

  • Now, if during the next 3.8 s, normal force is 930 N (same as the weight), this means that both forces are equal each other, so net force is 0.
  • According to Newton's 2nd Law, if net force is 0, the object  is either or at rest, or moving at a constant speed.
  • As the elevator  was moving, the only choice is that it is moving at  a constant speed, the same that it had when the scale was read for the first time, i.e., 4 m/s downward.
3 0
3 years ago
WHICH ONE IS CORRECT???
sveta [45]

Answer:

A

Explanation:

5 0
2 years ago
Read 2 more answers
Light is shown through air on a diamond (n=2.42) and it partially reflects and refracts.
NikAS [45]

Answer:

Light is shown through air on a diamond n=2.42) and it partially reflects and reflects.

Based on the incident angle of 62.5 shown what is the angle of reflection of the light

question of options

21.5

6 0
3 years ago
Which body systems help these cells get the energy they need?
PSYCHO15rus [73]

I believe there should be some sort of table attached. Unfortunately I cannot answer this question. Sorry!

5 0
3 years ago
HELP ME PLEASE
Stels [109]
The answer is B. the germinal stage
7 0
3 years ago
Read 2 more answers
Other questions:
  • When you walk at an average speed (constant speed, no acceleration) of 24 m/s in 94.1 sec
    6·1 answer
  • A 2kg bowling ball is 2.5 meter off the ground on a post when it falls. Just before it reaches the ground, it is traveling 7m/s.
    15·1 answer
  • Layers of Earth's Atmosphere
    10·1 answer
  • Which type of macromolecules a cell brake down food?
    14·1 answer
  • a parking lot is going to be 60m wide and 240m long which dimensions could be used please please help
    6·2 answers
  • On a safari, a team of naturalists sets out toward a research station located 4.63 km away in a direction 38.7 ° north of east.
    14·1 answer
  • A wire is joined to points X and Y in the circuit diagram shown.How does the circuit change when the wire is added?
    6·2 answers
  • State the law of conservation of energy​
    15·1 answer
  • describe why people are better off not consuming an additional good or service if the marginal cost is greater than the marginal
    15·1 answer
  • How could you prove that
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!