Answer:
520 N
Explanation:
Work is the dot product of the force vector and displacement vector.
W = F · x
This means it is the product of the magnitudes of the vectors and the cosine of the angle between them.
W = F x cos θ
The displacement of the soil is 15 m up. The force is parallel to the ramp. So the angle between the vectors is 90° − 35° = 55°.
Plugging in the values and solving for F:
4500 J = F (15 m) (cos 55°)
F = 523 N
Rounded to two significant figures, the force is 520 N.
Where are the following awnsers?
-10/3m/s2. The formula for acceleration is (Final speed - initial speed)/ time.
Thus, (0m/s - 10m/s)/3s is 10m/s/3s which then can be simplified to /10/3m/s2
Answer:
a 10 kg bag of hot water at the same temperature
Explanation:
A 10kg bag of hot water at the same temperature will retain heat much better and keep the tent warmer at night compared to the iron pellet.
- Water has a very large specific heat capacity.
- The specific heat capacity of water allows for it to retain heat better.
- It takes a larger amount of heat to warm water compared to iron which is a better conductor.
- In like manner, it takes more time for water to lose that amount of heat it has gained by the heating process.
- This is why it is a better choice to keep the room warm
Answer:
9.82×10⁻² m
Explanation:
w = Width of central maximum = 2.5 cm = 0.025 m
D = Distance between screen and slit = 2.2 m
λ = Wavelength of green light = 558 nm = 558×10⁻⁶ m
a = Width of slit
∴ Width of slit is 9.82×10⁻² m
