Answer:
a power level of 1 hp is approximately equivalent to 746 watts or 0.746kilowatts by 746. To convert from watts to horsepower, multiply by 0.00134. To convert from horsepower to kilowatt, multiply by 0.746
Answer:
The hill should be not less than 0.625 m high
Explanation:
This problem can be solved by using the principle of conservation of mechanical energy. In the absence of friction, the total mechanical energy is conserved. That means that
is constant, being U the potential energy and K the kinetic energy
![U=mgh](https://tex.z-dn.net/?f=U%3Dmgh)
![K=\frac{mv^2}{2}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7Bmv%5E2%7D%7B2%7D)
When the car is in the top of the hill, its speed is 0, but its height h should be enough to produce the needed speed v down the hill.
The Kinetic energy is then, zero. When the car gets enough speed we assume it is achieved at ground level, so the potential energy runs out to zero but the Kinetic is at max. So the initial potential energy is transformed into kinetic energy.
![mgh=\frac{mv^2}{2}](https://tex.z-dn.net/?f=mgh%3D%5Cfrac%7Bmv%5E2%7D%7B2%7D)
We can solve for h:
![h=\frac{v^2}{2g}=\frac{3.5^2}{2(9.8)}=0.625m](https://tex.z-dn.net/?f=h%3D%5Cfrac%7Bv%5E2%7D%7B2g%7D%3D%5Cfrac%7B3.5%5E2%7D%7B2%289.8%29%7D%3D0.625m)
The hill should be not less than 0.625 m high
Answer:
the answers the correct one is case B. The field decreases the external field
Explanation:
We place the bar in an area of space with an electric field, generated by a series of positive and negative charges. Negative charges inside the bar are attracted by positive charges, and positive charges are attracted by negative external charges. As the electric field has direction of the positive charges towards the negative ones the field inside the bar is contrary to the external field
When reviewing the answers the correct one is case B. The field decreases the external field
E_net = E_ext - E_int
Answer:
13,140N
Explanation:
Centripetal force (CF) = mv^2/r
Mass(m) = 1.46×10^3, velocity (v) = 15m/s, radius (r) = 25m
CF = (1.46×10^3 × 15^2)/25 = 328500/25 = 13,140N
The answer is D, human.
Happy Friday!!!