Answer:
90 feet
Explanation:
The farmer wants the second side of the garden to be 30 feet longer than the back of his house.
If the back of his house=x ft
The second side=(x+30) ft
Note that the farmer does not fence the side on the back of the house.
Area of the garden = 400 square feet
Area of a Rectangle= Length X Width
400 = x(x+30)
x+40=0 or x-10=0
x=-40 or x=10
Since length cannot be negative, x=10 ft
The Length of the Fencing the farmer will buy will be the perimeter of the three sides.
Perimeter of the three sides = x+(x+30)+(x+30)
=3x+60
=3(10)+60=90 ft
The farmer needs to buy a fencing of length 90 feet.
Answer: Option (b) is the correct answer.
Explanation:
Kinetic energy is the energy of an object or particle when it is in motion.
Mathematically, Kinetic energy = 
It is given that toy truck has mass = 0.75 kg, and velocity = 4 m/s.
Calculate the kinetic energy as follows.
Kinetic energy =
= 
= 
= 
= 
or, Kinetic energy = 6 joules
Thus, we can conclude that kinetic energy of toy truck is 6 J.
<span>To neutralize the charge of 1.0g of electrons?</span>
The sample of the solid in grams is 5.5g
HOW TO CALCULATE SPECIFIC HEAT CAPACITY:
- The quantity of heat absorbed or released by a substance can be calculated using the following formula:
Q = m × c × ∆T
Where;
Q = quantity of heat absorbed/released (cal)
m = mass of the substance (g)
c = specific heat (cal/g°C)
∆T = change in temperature (°C)
- According to the information provided in this question:
Q = 7.90Kcal = 7900cal
m = ?
c = 11.5 cal/g°C
T1 = 135K = 135K − 273.15 = -138.1°C
T2 = 260K = 260K − 273.15 = -13.15°C
∆T = -13.15 - (-138.1) = 124.95°C
- Hence, the mass of the substance can be calculated as follows:
m = Q ÷ c∆T
m = 7900 ÷ (11.5 × 124.95)
m = 7900 ÷ 1436.93
m = 5.5grams.
Therefore, the sample of the solid in grams is 5.5g.
Learn more: brainly.com/question/21643161?referrer=searchResults
Answer:
No
Explanation:
If the coil is accelerated parallel to the magnetic field, it means also that the force on the coil acts parallel to the field. For current to be induced in a coil, a basic condition must be met which is that the directions of force (acceleration) and the magnetic field must be perpendicular to each other. This brings about current being induced in a direction perpendicular to bothering the directions of the force acting on the coil and the that of the magnetic field. This current would flow through the coil in either a clockwise or anticlockwise manner.
Since the coil is accelerated parallel to the magnetic field, no current is induced in it.
