Answer:
Effort = 540 Newton
Explanation:
Given the following data;
Load arm = 60 cm
Effort arm = 40 cm
Load = 360 N
Conversion:
100 cm = 1 meters
40 cm = 40/100 = 0.4 meters
60 cm = 60/100 = 0.6 meters
To calculate the effort that Reha should apply to lift Neha, we would use the expression;
Effort * effort arm = load * load arm
Substituting into the expression, we have;
Effort * 0.4 = 360 * 0.6
Effort * 0.4 = 216
Effort = 216/0.4
Effort = 540 Newton
Explanation:
Both slinky waves and seismic waves are mechanical waves. Mechanical waves requires a medium to travel. These are of two types i.e. transverse wave and longitudinal waves.
Slinky wave is transverse in nature. The medium particle move to and fro during wave propagation.
Seismic waves are longitudinal in nature. These waves moves in the form of compression and rarefaction. Seismic waves are of two types i.e. P waves and S waves.
Hence, we have concluded that both waves are mechanical waves.
Answer:
A+B+C=7j+k
Explanation:
A=3i+4j
B=2i-2j+4k
C=i+5j-3k
A=3i+4j
+
B=<u>2</u><u>i</u><u>-</u><u>2</u><u>j</u><u>+</u><u>4</u><u>k</u>
i+2j+4k
A+B=i+2j+4k
+
C=<u>-i+</u><u>5</u><u>j</u><u>-</u><u>3</u><u>k</u>
7j+k
A+B+C=7j+k
Answer:
DU = 375 Joules
Explanation:
Given the following data;
Quantity of heat = 500 Joules
Work done = 125 Joules
To find the change in internal energy;
Mathematically, the change in internal energy of a system is given by the formula;
DU = Q - W
Where;
- DU is the change in internal energy.
- Q is the quantity of energy.
- W is the work done.
Substituting into the formula, we have;
DU = 500 - 125
<em>DU = 375 Joules</em>
Answer:
B
Explanation:
Astronomers cannot use parallax to find the distance to most stars. This is because the stars are: B too close.