Forces always act in pairs.
True
False
Answers
The answer to this question would be True
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The speed of a wave is determined by multiplying the wavelength by the frequency
Which of these waves probably has the largest wavelength?
Physics help!! 10ptA small object placed in the gravitational field of a more massive object willA. accelerate toward the more massive object.B. accelerate away from the more massive object.C. move toward the more massive object at a constant speed.D. move away from the more massive object at a constant speed.
b. the height of high tides varies with the phases of the moon.
c. spring tides and neap tides affect the phases of the moon.
d. the moon revolves around the Earth every 14 days.
Please select the best answer from the choices provided
Answers
Answer:
D
Explanation:
Because neap and spring tides happen twice a month during new moon and full moon .It occurs twice in a month which is 14 days
Answer:
i think it is d
Explanation:
Answers
Answer:
C. work function
Explanation:
In the photoelectric effect, the energy of the incident photon is used in part to extract the electron from the metal (and this energy is called work function) and the rest is converted into kinetic energy of the electron. In formula:
where
hf is the energy of the incident photon, which is the product between h (the Planck constant) and f (the photon's frequency)
is the work function
K is the kinetic energy of the photoelectron as it leaves the material
Answers
H2SO4 sulfuric acid
Answers
The force will increase
b. 11 kg.
c. 110 kg.
d. 1100 kg.
e. none of the above
Answers
A lamb that weighs 110 N has a mass of around 11 kg. Hence, option B is correct except B all options are incorrect.
What are Mass and Weight?
The mass of a physical body is a measure of its entire makeup. Inertia, or the body's resistance to acceleration when a net force is applied, is also measured by this term. The strength of a body's gravitational pull on other bodies is also influenced by its mass. The kilogram is the fundamental mass unit of the SI.
In physics and engineering, the weight of an object refers to the gravitational force that pulls on it. Weight is the term used in many widely used textbooks to describe the gravitational force acting on the object. Some people think of weight as a scalar quantity that gauges the gravitational force's strength.
According to the question, the given values are :
Weight, w = 110 N and,
Taking value of g = 10 m/s²
As we know that :
w = m × g
110 = m (10)
m = 11 kg
Hence, the mass of the lamb will be 11 kg.
To get more information about Mass and weight :
#SPJ5
w = 110 N
w = m x g
110 = m x 10
110 = 10 m
m = 110/10 = 11 kg
Answers
As per the question,the bus slows down uniformly from 75 km/h to 0 km/h.
Hence the initial velocity of the bus[ u]=75 km/hr.
the final velocity of the bus [v]=0 km/h
the taken by the bus to stop [t]=21 s
we know that 1 km= 1000 m and 1 hour =3600 second.
Hence
=20.83 m/s
we are asked to calculate the stopping distance.
From equation of kinematics we know that-
v= u +at where a is the acceleration of the particle.
we have v= 0 km/h = 0 m/s and u= 75 km/h =20.83 m/s
t = 21 s
Putting these values in above equation we get-
0 = 20.83 +a×21
⇒ a×21 = -20.83 m/s
⇒a= -[20.83]÷21
[ Here negative sign indicates that particle is decelerating ]
Again from the equation of kinematics we know that-
Here s is the distance traveled. Putting the above quantities we get-
s = 218.7 metre. [ans]
Hence the bus will stop after a distance of 218.7 m.
1 hour = 3,600 seconds
1 km = 1,000 meters
75 km/hour = (75,000/3,600) m/s = 20-5/6 m/s
The average speed of the bus while it slows down is
(1/2)(20-5/6 + 0) = 10-5/12 m/s .
Traveling at an average of 10-5/12 m/s for 21 seconds,
the bus covers
(10-5/12) x (21) = 218.75 meters .