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topjm [15]
3 years ago
15

True or False? A negative energy balance occurs when you take in more calories than you need, and a positive energy balance occu

rs when you take in fewer calories than you need.
Physics
1 answer:
Rudik [331]3 years ago
7 0
False, because if you take too much calories, you are have too much. That means you are in the positive, you have too much energy.

and if you take fewer, you will have less calories, so less energy.
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You walk to school every day. It is 0.5 miles. After school you walk to Kroger, which is 1.3 miles. You leave Kroger to go all b
marin [14]
The total distance you haved walked should be 2.6 miles
7 0
2 years ago
A sphere P, made of steel, has a weight of 10 N on Earth.
expeople1 [14]
An object’s mass is not determined by gravity, however weight is. With this information, you can figure out that Mars has less gravity acting on the object.
4 0
3 years ago
The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 440g . The vibra
ANEK [815]

Answer:

Tension, T = 2038.09 N

Explanation:

Given that,

Frequency of the lowest note on a grand piano, f = 27.5 Hz

Length of the string, l = 2 m

Mass of the string, m = 440 g = 0.44 kg

Length of the vibrating section of the string is, L = 1.75 m

The frequency of the vibrating string in terms of tension is given by :

f=\dfrac{1}{2L}\sqrt{\dfrac{T}{\mu}}

\mu=\dfrac{m}{l}

\mu=\dfrac{0.44}{2}=0.22\ kg/m

T=4L^2f\mu

T=4\times (1.75)^2\times (27.5)^2 \times 0.22

T = 2038.09 N

So, the tension in the string is 2038.09 N. Hence, this is the required solution.

6 0
3 years ago
They are adding steel components to the roof supports of the structure. We know that steel elongates when heated. At what temper
Andru [333]

Answer:

The change in temperature of 576.9°C will produce an elongation of 9 inches per feet in steel.

Explanation:

The formula for linear expansion of a material is:

ΔL = αLΔT

where, ΔL = change in length

             L = Original length

           ΔT = Change in temperature

             α = coefficient of linear expansion

For steel, α = 13 x 10^-6 /°C

                L = 100 ft

                ΔL = (9 in)(1 ft/12 in) = 0.75 ft

Therefore,

0.75 ft = (13 x 10^-6 /°C)(100 ft)ΔT

<u>ΔT = 576.9°C</u>

<u></u>

8 0
3 years ago
The magnitude of the action potential is correlated with the strength of the stimulating input. True or False
Vesnalui [34]

Answer:

True

Explanation:

3 0
3 years ago
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