Explanation:
Acceleration is a vector quantity which is defined as the rate at which an object changes its velocity
An object with a mass of 10 kg is
dropped at the same time as an object with a mass of 100 kg. Assuming both objects are in free fall, explain how they will fall in comparison to one another.
Answer:
See below
Explanation:
They will fall at the same speed .....they will stay together if we ignore air friction
a flashlight bulb with a 6.00 resistor uses 18.0W of power. What is the current through the bulb
a. I= 2.00A
b. I=3.00A
c. I=1.73A
d. I =0.333A
We need voltage first
P=V²/RV²=PRV²=18(6)V²=108V=√108V=10.4VApply oHMS law
V/I=RI=V/RI=10.4/6I=1.73AAnswer:
c. I = 1.73A
Explanation:
The formula for power :
P = VIThe formula for potential difference :
V = IRCalculating P by inputting the formula of V :
P = (IR)(I)P = I²RSolving using the given values :
18 = I² x 6I² = 3I = √3I = 1.73AWhen astronomers look at stars outside of our galaxy, they have noticed that the color of the stars appears to be shifted slightly to the red end of the visible spectrum; this means that the wavelength of the light coming from those distant stars is longer than expected. If this red shift is assumed to be caused by the relative motion of the stars, what does that tell us about their movement?
They are moving toward the Earth.
They are moving away from the Earth.
They are not moving relative to the Earth.
Both the Earth and the star are stationary.
Answer:
moving away
Explanation:
They are moving AWAY from earth making the wavelengths longer than what was emitted....this is called 'Red Shift'.... longer waves is a shift toward the RED end of the spectrum .. (ROY G BIV)
What is the wavelength of radiation with a frequency of 1.50 x 1013 s-1
Answer:
[tex]2 \times 10^{-5}\ m[/tex]
Explanation:
[tex]v = f \lambda[/tex]
velocity of wave = frequency x wavelength
I'll assume we're talking about EM radiation here, which is any kind of light (microwave, ultraviolet, visible, etc.).
Every type of EM radiation has the same velocity — the speed of light.
Speed of light, known as [tex]c[/tex] — 300 000 000 = [tex]3 \times 10^8[/tex]
velocity: [tex]c = 3 \times 10^8[/tex] [tex]ms^{-1}[/tex]
frequency: [tex]f = 1.5 \times 10^{13}[/tex] [tex]\text{Hz}[/tex]
wavelength: [tex]\lambda =\ ?[/tex] [tex]m[/tex]
[tex]v = f \lambda\\3 \times 10^8 = 1.5 \times^{13}\ \times \ \lambda\\\text{rearrange for}\ \lambda\\\lambda = \frac{3 \times 10^8}{1.5 \times 10^{13}} = 2 \times 10^{-5}[/tex] [tex]m[/tex]
what are loops and its types
Answer:
A for loop is a loop that runs for a preset number of times. A while loop is a loop that is repeated as long as an expression is true. An expression is a statement that has value. A do while loop or repeat until loop repeats until an expression becomes false.
An object is placed 15.0 cm to the left of a double-convex lens of focal length 20.0 cm. The image of this object is located.
The image of this object is located at -60 cm. The formula for the mirror equation is used in the given problem.
What is a mirror equation?A mirror equation is an equation that relates object distance and image distance to focal length.
The given data in the problem is;
Image distance (u) = 15 cm
Object distance (v) = ?
f is the mirror's focal length=20 cm
The mirror equation is given as;
[tex]\rm \frac{1}{v} +\frac{1}{u} =\frac{1}{f} \\\\ \rm \frac{1}{v} =\frac{1}{20} -\frac{1}{15} \\\\ \frac{1}{v} = 0.01666 \\\\\ v=-60 \ cm[/tex]
Hence, the image of this object is located at -60 cm.
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Newtons second law in words??
Answer:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object
Explanation:
it's newton's second law
Venus and Earth may be regarded as behaving as black bodies. The mean temperature at the surface of Venus is about 600 K and at the surface of Earth is about 300 K. Which of the following is the best estimate for the ratio \frac{\text{power radiated per unit area on Earth}}{\text{power radiated per unit area onVenus}} power radiated per unit area onVenus power radiated per unit area on Earth
The best estimate for the ratio of Power radiated per unit Area on Earth and Power radiated per unit Area on Venus is 1/16. The correct option is D.
What is power radiated?Power radiated is directly proportional to the fourth power of Temperature at the surface and also to the cross-section area.
P = σ A T⁴
For 600 K at Venus, σ A T⁴ = σ A (600)⁴
For 300 K at Earth , σ A T⁴ = σ A (300)⁴
Comparing, we get
[σ A (300)⁴/ σ A (600)⁴ ] = 1/16
Thus, the the best estimate for the ratio is 1/16. The correct option is D.
Learn more about Power radiated.
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what is the distance of a car travels is its velocity is 30 mph and its time is 2 hours ?
Answer:
distance = 60 miles
Explanation:
Why do the other bulbs go dark when one bulb is removed in the series circuit but the other bulbs do not go dark when one bulb is removed in the parallel circuit?
Answer:
I think this
One bulb burning out in a series circuit breaks the circuit. In parallel circuits, each light has its own circuit, so all but one light could be burned out, and the last one will still function.
1. An athlete runs 18 Kilometers in 2.5 hours, bicycles 150 Km in 4 hours, swims 10 Km in 3 hours.
Calculate:
a) the average speed for each leg of the triathlon
b) the average speed for the entire competition
The average speed is 18.73 km/hour.It is found as the ratio of the total distance and the total time taken.
What is the average speed?The total distance traveled by an object divided by the total time taken is the average speed.
The average speed of an object indicates the pace at which it will traverse a distance. The metric unit of speed is the meter per second.
The given data in the problem is;
Distance (d₁) = 18 Kilometers
Time (t₁) = 2.5 hours
Distance (d₂) = 150 Km
Time (t₂)= 4 hours
Distance (d₃) =10 Km
Time (t₃)=3 hours.
The average speed is found as;
[tex]\rm v_{avg}= \frac{Total \ distance }{Total \ time } \\\\ V_{avg}=\frac{18+150+10}{2.5+4+3} \\\\ v_{avg}= 18.73 \ km/hours[/tex]
Hence, the average speed is 18.73 km/hour.
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Please help!! Look at pic
Answer:
Explanation:
Voltage and Current relation is given by V=IR
I=9A
R=4Ohm
V=IR
V=9x4=36Volts
Resistance = 4 Ohm
Current = 9 Ampere
Voltage = 36 Volts

Which of the following is a physical change?
sawing a piece of wood in half
O burning a piece of wood
O a copper statue turning from red to green
Orust forming on an iron fence
Answer:
I think its 'sawing a piece of wood in half'
Explanation:
sry if its wrong
Which option is it pls help
Answer:
3.74 x 10^12 electrons
Explanation:
.6 x 10^-6 C * 1/( 1.60218 x 10^-19) e /C
= 3.74 x 10^12 electrons
