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mina [271]
3 years ago
5

Green: A new house is fitted with all the latest energy efficiency measures. An energy surveyor checks a new house and finds tha

t each second a house is losing 125W of heat through its roof. The heaters in the house are producing around 800W of heat. a. How much of the energy is useful (staying in the house)? b. How efficient are energy efficient measures?​
Physics
1 answer:
Pani-rosa [81]3 years ago
8 0

Answer:

Using the sentence in learning task 7 identify the type of context clues used in each item​

Explanation:

malay ko

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L 3.2.3 Quiz: Friction
MAVERICK [17]

Answer:

the higher the value of the coefficient of friction the MORE the resistance to sliding . 

6 0
4 years ago
Kinetic Friction force is always less than Static Friction force.
mars1129 [50]

Answer:

true

Explanation:

Initially it requires more force to break the interlock between the irregularities of two surfaces. But once the block is in motion, it takes time to interlock between the irregularities of two surfaces. Also, the body gains the inertia of motion.

4 0
3 years ago
a ball is thrown straight upward with an initial velocity of 16 m/s. use g+/- 10 m/s^2 for computations. how much time is requir
EleoNora [17]
Answer: t = 1.6s

Explanation: Use Fab 5 equation to solve for t (d is irrelevant so use equation without d)
vi = 16m/s, a = -10m/s^2, vf = 0m/s, t = ?

(Assume up is positive so acceleration is negative!!!)

a = vf - vi / t
-10 = 0 - 16 / t
-10t = -16
t = 1.6s

Hope this helps! :)
4 0
3 years ago
The magnetic field inside a superconducting solenoid is 4.00 T. The solenoid has an inner diameter of 6.20 cm and a length of 26
Delvig [45]

Answer:

(a) The magnetic energy density in the field is 6.366 J/m³

(b) The energy stored in the magnetic field within the solenoid is 5 kJ

Explanation:

magnitude of magnetic field inside solenoid, B = 4 T

inner diameter of solenoid, d = 6.2 cm

inner radius of the solenoid, r = 3.1 cm = 0.031 m

length of solenoid, L = 26 cm = 0.26 m

(a) The magnetic energy density in the field is given by;

u _B = \frac{B^2}{2\mu_o} \\\\u _B = \frac{(4)^2}{2(4\pi*10^{-7})}\\\\u_B = 6.366*10^6 \ J/m^3

(b) The energy stored in the magnetic field within the solenoid

U_B = u_B V\\\\U_B = u_B AL

U_B = u_B(A)(L)\\\\U_B = 6.366*10^6(\pi * 0.031^2)(0.26) \\\\U_B = 4997.69 J\\\\U_B = 5 \ KJ\\

6 0
3 years ago
Equilibrium of Non-Concurrent Forces Lab
Gnesinka [82]

Answer:

1) Translational equilibrium(Net force =0) and rotational equilibrium(net torque=0)

2)m1/m2=r2/21

Explanation:

6 0
4 years ago
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