Heat energy required= mass x change in temperature x specific heat capacity = 20 x 35 x 4200= 2940000 J
Answer:
1.27
Explanation:
Period of a pendulum T is
T = 2¶(l/g)^0.5
Where g is acceleration due to gravity
l is lenght of pendulum
For earth, T = 2.243 s
2.243 = 2 x 3.142 x (l/9.81)^0.5
0.36 = (l^0.5)/3.13
1.13 = l^0.5
l = 1.28 m
For planet X of the same lenght
Period T = 2.00 s
2 = 2 x 3.142 (1.28/gx)^0.5
0.32 = 1.13 / gx^0.5
3.53 = gx^0.5
gx^0.5 = 3.53
gx = 12.46 m/s^2
gx/gearth = 12.46/9.81 = 1.27
Answer:
direction
Explanation:
because particles surround the bell, so when the bell vibrates, it causes particles surrounding it to vibrate back and forth vigorously. as these particles vibrate they collide with the neighbouring particles, passing on the energy.
hope this is what you are asking, if not please report it so that someone else gets to try it.
Answer:
The average power is calculated as 735.0 W
Solution:
As per the question:
Total mass, M = 1200 kg
Counter mass of the elevator, m = 950
Distance traveled by the elevator, d = 54 m
Time taken, t = 3 min = 180 s
Now,
To calculate the average power:
First, we find the force needed for lifting the weight:
Force, F = (M - m)g = ![(1200 - 950)\times 9.8 = 2450 N](https://tex.z-dn.net/?f=%281200%20-%20950%29%5Ctimes%209.8%20%3D%202450%20N)
Now, the work done by this force:
W = Fd = ![2450\times 54 = 132300\ J = 132.3\ kJ](https://tex.z-dn.net/?f=2450%5Ctimes%2054%20%3D%20132300%5C%20J%20%3D%20132.3%5C%20kJ)
Average power is given as:
![P_{avg} = \frac{W}{t} = \frac{132300}{180} = 735.0\ W](https://tex.z-dn.net/?f=P_%7Bavg%7D%20%3D%20%5Cfrac%7BW%7D%7Bt%7D%20%3D%20%5Cfrac%7B132300%7D%7B180%7D%20%3D%20735.0%5C%20W)
Answer:
photosynthesis uses carbon dioxide
Explanation:
Consider the following statements:
1. Carbon dioxide, chlorophyll, and sunlight are all essential for photosynthesis.
2. Rate of photosynthesis is maximum in red light and minimum in green light.
3. Increase
concentration decreases the rate of photosynthesis.
Which of the statements given above are correct about photosynthesis?