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Mnenie [13.5K]
3 years ago
11

A horse pulls a plow with a 242 N force for

Physics
1 answer:
prohojiy [21]3 years ago
4 0

Answer: The answer is D

Explanation: i had the same question and i just guessed and got it first try

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A wave has a wavelength of 5m and frequency of 5 Hz. What is the speed of the wave?​
Anna71 [15]
If you multiply m (the unit for wavelength) with 1s (the unit for frequency), you will get m/s, the unit for speed. Now multiply! 25 m/s is your final answer!
3 0
3 years ago
Could I please get some help on this question I don’t understand .
Oksana_A [137]

Answer:

12.5 m/s

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Height (h) = 8 m

Final velocity (v) at 8 m above the lowest point =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

The velocity of the roller coaster at 8 m above the lowest point can be obtained as follow:

v² = u² + 2gh

v² = 0² + (2 × 9.8 × 8)

v² = 0 + 156.8

v² = 156.8

Take the square root of both side

v = √156.8

v = 12.5 m/s

Therefore, the velocity of the roller coaster at 8 m above the lowest point is 12.5 m/s.

5 0
3 years ago
Engineers have designed experimental cars that use liquid hydrogen for fuel instead of gasoline. this is an example of _____. re
olasank [31]

Engineers have designed experimental cars that use liquid hydrogen for fuel instead of gasoline. this is an example of Substitution.


Substitution is the process where one thing replaces other for a particular purpose. here liquid hydrogen is replacing the gasoline for fuel in car. hence the correct word to fill is Substitution.

5 0
3 years ago
Read 2 more answers
A rocket of mass 40000kg propelled by a force of 10^6N acquires a speed of 3000m/s determine the power expended
Katyanochek1 [597]

Answer:

3×10⁹ W

Explanation:

Power = work / time

Power = force × distance / time

Power = force × velocity

P = Fv

P = (10⁶ N) (3000 m/s)

P = 3×10⁹ W

6 0
3 years ago
What element is found in liver and is needed to prevent anemia or tired blood
mel-nik [20]
Iron, and lack of red blood cells can cause anemia so you'd need those to prevent it.
6 0
3 years ago
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