Answer:
I= 27.09 A
Explanation:
Power of electric heater = 1500W= 1.50*10³ W
Power of toaster = 750W = 7.5*10²W
Power of electric grill = 1000W =1*10³ W
Voltage = 120V
By using formula P=VI ie I = 
A) Current used by electric heater I₃ =
I₃ = 12.5 A
B) Current used by toaster I₂ =
I₂ = 6.25 A
C) Current used by electric grill I₃ = 
I₃ = 8.34 A
Current used by all three appliances is
I=I₁+I₂+I₃
I=12.5+6.25+8.34
I= 27.09 A
One
Givens
- v = 8.5 km/s = 8500 m/s
- R = 25 cm = 0.25 m
- B = 5.29 * 10^-3
- q = 1.6*10^-19
- m = ??
Formula
m*v^2/ R = qvB Cancel 1 v on each side.
m*v / R = q*B
which for m when transposed is
m = q*B*R/v
m = 1.6*10^-19 * 5.29*10^-3 * 0.25 / 8500
m = 2.49 * 10^-26
Answer: A
Two
Givens
- B = 0.5 T
- q = 1.6 * 10^ -19
- v = ??
- m = 3.34 * 10^-27
- R = 55.6 cm = 0.556 m
Formula
qvB = mv^2/R Cancel one of the "v"s
qB = mv/R
qBR / m = v
Solution
1.6*10^-19 * 0.5 T * 0.556 m / 3.34 * 10^-27
13317365 = v
1.33 * 10^7 = v
If an element has a charge of +1, there is 1 more proton than electrons.
A proton has a charge of +1
A neutron has a charge of 0
A electron has a charge of -1.
For there to be a charge of 0, there would be the same amount of charges for both proton and neutron. To get a charge of 1, you will need 1 more proton.
hope this helps
Answer:
i don't know getting free points
Explanation:
Answer:
option D
Explanation:
given,
initial speed of motor, ω₁ = 90 rad/s
final speed of motor, ω₂ = 30 rad/s
angle, θ = 180 rad
angular acceleration,α = ?
using equation of rotational motion
ω₂² = ω₁ ² + 2 α θ
90² = 30² + 2 x α x 180
360 α = 7200
α = 20 rad/s²
the angular acceleration of the motor comes out to be 20 rad/s²
the correct answer is option D
