Answer:
750 J
Explanation:
We have a student that pushes a 50N block across the floor for a distance of 15m. The question is asking how much work was done to move the block.
To solve this, we must know that we are looking for a certain thing called joules. And to get the answer, we must follow the formula of W = FS
F being the force and S being the distance.
W = FS
W = (50)(15)
W = 750
Therefore, 750 joules is our answer.
Vinyl records because it’s not a secure information storage
Answer:
9.67 A
Explanation:
The weight of a student with a mass of m = 75 kg is:

where g=9.8 m/s^2 is the acceleration due to gravity.
We want the magnetic force on the wire to be equal to this weight. The magnetic force on the wire is

where
I is the current in the wire
L = 2.0 m is the length of the wire
B = 38 T is the magnetic field
is the angle between the direction of B and L
Since we want W=F, we can write

And we can solve it to find the current I:

Answer:
<h2>The water tank have to support a pressure of 50,456 Pa.</h2>
Explanation:
To design the cylindrical, pressurised water tank, we need to calculate the total pressure that it's being applied to tank, in order to know how strong we need to make it.
The total pressure (P) on the tank is always the sum of all pressures that are involved, external air pressure (P1), inside pressure (P2) and the pressure due to the mass of water (P3).
So, The external air pressure (P1) is 95.0 kPa.
The inside pressure (P2) is 110 kPa.
The pressure due to the mass of water (P3) will be calculated with:
; where p is density of the water, g is the gravity and h the height.
Using the values given g = 3.71 m/s2; h = 13.6 m and p = 1000 kg/m3.

Therefore, we need to design an water tank strong enough to endure a pressure of 50,456 Pa.
Answer: Four to eight times a day for 20 mins (:
Explanation:
just took it got it right