Answer:
Yes a body moving with a constant speed has an acceleration. When an object travel in a circle with a constant speed it's direction keeps changing as a result velocity changing but it works at the centre of the circle therefore acceleration acts at the centre of the circle.
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- Velocity is the distance travelled by an object in a unti time with a specific direction . It is a vector quantity.
- Velocity = Displacement/time
- Ways in which velocity can be change -
- By changing speed
- By changing Direction
- Acceleration is the rate. change of velocity
- Acc = V - U /t
- It is also a vector quantity
- Si unit of velocity = M/S
- Si unit of acceleration = M/S^2
- Average velocity = V + u /2
- U = Initial velocity
- V = Final velocity
- acc = acceleration
- The initial velocity of an object at rest is 0
- The final veloctiy of an object after rest is 0
Answer:
Explanation:
Given:
Solute Diffusion rate = 4.0 × 10⁻¹¹ kg/s
Area of cross-section = 0.50 cm²
Length of channel =0.25 cm
Now for the new channel
Area of cross-section = 0.30 cm²
Length of channel =0.10 cm
let the Solute Diffusion rate of new channel = s
now equating the diffusion rate per unit volume for both the channels
thus,
The mechanical advantage is the "multiplication" that happens
between the input force and the output force.
If the input force is 80N and the mechanical advantage is 25.6,
then the output force is
(80 N) x (25.6) = 2,048 N
Answer:
the smallest angle from the antennas is <em>47.3°</em>
Explanation:
We first need to write the expression for the relation between the wavelength (λ) and the frequency (f) of the wave, and then solve for the wavelength.
Therefore, the relation is:
λ = c /f
where
- c is the speed of light constant
- λ is the wavelength
- f is the frequency
Thus,
λ = (3 × 10⁸ m/s) / (3.4 MHz)
= (3 × 10⁸ m/s) / (3.4 MHz)(10⁶ Hz/1 MHz)
= 88.235 m
Therefore, the smallest angle measured (from the north of east) from the antennas for the constructive interference of the two-radio wave can be calculated as
θ = sin⁻¹(λ / d)
where
- d is the distance between the two radio antennas
Thus,
θ = sin⁻¹(88.235 / 120)
<em>θ = 47.3 °</em>
<em></em>
Therefore, the smallest angle from the antennas, measured north of east, at which constructive interference of two radio waves occurs is <em>47.3 °</em>.
Answer:
D. The car is slowing down.
Explanation:
When a car slows down, the acceleration is in the opposite direction as the velocity. With that being said, the car would have negative acceleration.
hope this helps!! p.s. i really need brainliest :)