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klasskru [66]
3 years ago
13

. For transverse waves, compare the direction that the particles move to

Physics
1 answer:
Elza [17]3 years ago
5 0

Answer:

The particles in transverse waves move perpendicular to the direction of how the wave moves.

Explanation:

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The energy content of food is conventionally measured in Calories rather than joules. One Calorie in nutrition is equal to 4184
Rama09 [41]

Answer:

Part a)

P = 186 W

Part B)

N = 676 times

Explanation:

Part a)

Average power is rate of energy consumption

So it is given as

P = \frac{mgh}{t}

P = \frac{100(75.7)(9.81)(0.150)}{59.9}

P = 186 W

Part b)

If the efficiency is given as

\eta = 20%

so we know that 20% of total energy consumed is converted into output work

So total power consumed here will be given as

P = \frac{186}{0.20}

P = 930 W

Energy consumed by him

E = power \times time

E = 930 \times 59.9

E = 55707 J

now we know that 1 g fat will release 9 Calories energy

So we have

1 g = 9 \times 4184 J

1 g = 37656 J

so to consume 1000 g of fat we need to release  total energy

E = 37656 \times 10^3 J

so total number of times

N = \frac{37656 \times 10^3}{55707}

N = 676 times

5 0
4 years ago
An air track car with a mass of 0.75 kg and a velocity of 8.5 m/s to the right collides elastically with a 0.65kg car moving to
Sunny_sXe [5.5K]
We can do this with the conservation of momentum. The fact it is elastic means no KE is lost so we don't have to worry about the loss due to sound energy etc.

Firstly, let's calculate the momentum of both objects using p=mv:

Object 1:
p = 0.75 x 8.5 = 6.375 kgm/s

Object 2 (we will make this one negative as it is travelling in the opposite direction):
p = 0.65 x -(7.2) = -4.68 kgm/s

Based on this we know that the momentum is going to be in the direction of object one, and will be 6.375-4.68=1.695 kgm/s

Substituting this into p=mv again:

1.695 = (0.75+0.65) x v
Note I assume here the objects stick together, it doesn't specify - it should!

1.695 = 1.4v
v=1.695/1.4 = 1.2 m/s to the right (to 2sf)
8 0
3 years ago
Which statement correctly compares the speed of light
Elodia [21]

The speed of light in glass is slower than the speed of light through space.


4 0
4 years ago
Read 2 more answers
For each of the following statements, determine whether it is true or false.
Oksanka [162]

Answer:

1) True: Spring A is stiffer than B (kA > kB). Less work must be expended on spring A if both springs are stretched by the same amount.

2) False: The kinetic energy of an object depends on the direction of the motion involved.

3) True: The work done to raise a box onto a platform does not depend on how fast it is raised.

4) True: The friction force is a non-conservative force.

5) True: The kinetic energy can be negative.

6) False: The kinetic energy does not depend on the reference frame of the observer.

7) False: Work can be done in the absence of motion.

8) False: If the moon revolves around the earth in a perfectly circular orbit, then the earth does do work on the moon.

6 0
3 years ago
__________ postures occur when you are doing work that causes you to hold the same posture or position for an extended period of
cricket20 [7]
So the answer to this question is B. Static
3 0
3 years ago
Read 2 more answers
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