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3 years ago

10

What carries energy

2 answers:

Fed [463]3 years ago

5 0

Yes, electromagnetic waves do carry energy. In fact, every wave carries energy: that is, potential energy.

Brums [2.3K]3 years ago

4 0

Waves and matter. Some waves can move through matter while others cannot. ... Sound waves, on the other hand, cannot move through empty space. Inherently, all waves carry energy from one place to another<span> when they move.</span>

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Isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are known as the ____.

Sveta_85 [38]

The answer is amino acids :). hope that helped!

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3 years ago

The north pole of one bar magnet is near the south pole of another bar

Neporo4naja [7]

B
Opposites attract
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3 years ago

A car has positive acceleration. What information can you infer from this? A- The car is changing direction. B- The car is speed

kvv77 [185]

Answer:

answe is b

Explanation:

A positive acceleration is defined as change of velocity upwards the direction that the object has taken. Therefore, a car having a positive acceleration means that the car is speeding up in the same direction as it traveling.

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3 years ago

Read 2 more answers

How is the volume flow rate of water out of the tank, dVdt, related to the flow speed v ? Express your answer in terms of some,

Rainbow [258]

Answer:

$\frac{dV}{dt}= \frac{\pi d^2}{4}v$

Explanation:

The rate of volume flow out of tank can be expressed as:

$\frac{dV}{dt} = A\frac{dL}{dt}$

where,

dV/dt = Volume flow rate

A = Cross-sectional area of outlet = πd²/4

d = diameter of circular outlet

dL = Displacement covered by water

dt = time taken

but we know that:

Velocity = υ = displacement/time = dL/dt

Substituting the values of "dL/dt" and "A" in the equation, we get:

$\frac{dV}{dt} = \frac{\pi d^2}{4}v$

This is the expression for volume flow rate dV/dt, on terms pf v, d.

8 0

3 years ago

An object is formed by attaching a uniform, thin rod with a mass of mr = 6.9 kg and length L = 4.88 m to a uniform sphere with m

Bumek [7]

Answer:

a) total moment of inertia is 1359.05 kg m^2

b) angular acceleratio is 0.854rad/sec^2

Explanation:

Given data:

m1=6.9 kg

L=4.88 m

m2=34.5 kg

R=1.22 m

we klnow that moment of inertia for rod is given as

J1=(1/12) ×m×L^2

$J1 = (1/12) \times 6.9 \times 4.88^2 = 13.693 kg m^2$

moment of inertia for sphere is given as

J1=(2/5) ×m×r^2

$J1 = (2/5) \times 34.5 \times 1.22^2 = 20.539 kg m^2$

As object rotates around free end of rod then for sphere the axis around what it rotates is at a distance of d2=L+R

For rod distance is d1=0.5*L

By Steiner theorem

for the rod we get $J_1'=J_1 + m_1\times d_1^2$

$J_1' = 13.693 + 2.44^2\times 6.9 = 54.77 kg m^2$

for the sphere we get $J_2' = J_2 + m_2\times d_2^2$

$J2' = 20.539 + 34.5\times 6.1^2 = 1304.28 kg^m2$

And the total moment of inertia for the first case is

$J_{t1} = J_1'+J_2' = 54.77 + 1304.28 = 1359.05kg.m^2$

b) F=476 N

The torque for system is given as

$M = F\times d\times sin(a)$

where a is angle between Force and distance d

and where d represent distance from rotating axis.

In this case a = 90 degree

$M = F\times L/2$

M=476*2.44 = 1161.44 Nm

The acceleration is calculated as

$a_1 = \frac{M}{J_{t1}}$

$= \frac{1161.44}{1359.05}$

= 0.854 rad/sec^2

4 0

3 years ago