Answer:
The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.
Explanation:
Given that,
Slope down = 32°
Height = 25 m
Before leveling,
Slope down = 20°
Height = 38 m
We need to calculate the skier’s speed on the two level stretches
Using formula of energy



For first stretch,
Height = 25 m
Put the value into the formula


For second stretch,
Height = 38 m
Put the value into the formula


Hence, The skier’s speed on the two level stretches are 22.13 m/s and 27.29 m/s.
Gravitational Potential energy is the energy stored with regard to position.
the equation for potential energy is as follows
P.E = mass x gravitational acceleration x height from the ground
gravitational acceleration - 9.8 ms⁻²
substituting the values in the equation
P.E = 125 kg x 9.8 ms⁻² x 1500 m
P.E = 1 837 500 J
therefore the potential energy of the diver at 1500 m high is 1 837 kJ
Complete question:
Two conductors made of the same material are connected across the same potential difference. Conductor A has seven times the diameter and seven times the length of conductor B. What is the ratio of the power delivered to A to power delivered to B.
Answer:
The ratio of the power delivered to A to power delivered to B is 7 : 1
Explanation:
Cross sectional area of a wire is calculated as;

Resistance of a wire is calculated as;

Resistance in wire A;

Resistance in wire B;

Power delivered in wire;

Power delivered in wire A;

Power delivered in wire B;

Substitute in the value of R in Power delivered in wire A;

Substitute in the value of R in Power delivered in wire B;

Take the ratio of power delivered to A to power delivered to B;

The wires are made of the same material,

The wires are connected across the same potential; 

wire A has seven times the diameter and seven times the length of wire B;

Therefore, the ratio of the power delivered to A to power delivered to B is
7 : 1
The mass of the van will be 2.5 kg, Mass is found as the ratio of the force and the acceleration.
<h3>What is force?</h3>
Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
Force is defined as the product of mass and acceleration. Its unit is Newton.
F=ma
5.5 kN = m × 2.2m/s²
m= 2.5 kg
Hence,the mass of the van will be 2.5 kg,
To learn more about the force refer to the link;
brainly.com/question/26115859
#SPJ1
The appropriate answer for number 1 is d. the gaseous state is electrically neutral while the plasma state can be either electrically positive or negative. The appropriate answer for number 2 is c. pressure will compress a gas, reducing its volume and giving it a greater density and concentration of particles.