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bagirrra123 [75]
2 years ago
12

A weather forecaster uses Doppler radar to predict the track of a storm near the town of hillville when the Doppler signal is he

pointed at the storm from the town center the frequency of the waves appear to be increasing what should the weather forecaster predict?
A. That the storm will move around the edges of hillville without hitting the towns center

B. That the storm is moving toward hillville and that residents should be prepared

C. That the storm will not hit hillville because it is moving away

D. That residents should be prepared because it is impossible to know whether the storm will hit
Physics
1 answer:
Veseljchak [2.6K]2 years ago
6 0

Answer: That the storm is moving toward hillville and that residents should be prepared.

Explanation:

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If a ball is thrown up at an initial speed of 40. m/s, how many seconds does it take to reach the top of its path?
natka813 [3]

Answer:

Time, t = 4.08 secs

Explanation:

<u>Given the following data;</u>

Initial velocity, U = 40m/s

To find the time, we would use the first equation of motion;

V = U + at

Where;

  • V is the final velocity.
  • U is the initial velocity.
  • a is the acceleration.
  • t is the time measured in seconds.

<em>Making time, t the subject of formula, we have;</em>

t = \frac{V - U}{a}

We know that acceleration due to gravity, g is 9.8m/s².

a = g = - 9.8m/s² because the ball is thrown in the opposite direction.  

Also, the final velocity is equal to zero (0) because the ball reached its maximum height.

<em>Substituting into the equation, we have;</em>

t = \frac{0 - 40}{-9.8}

t = \frac{-40}{-9.8}

Time, t = 4.08 secs

<em>Therefore, it will take the ball 4.08 seconds to reach the top. </em>

5 0
3 years ago
Distant galaxies appear to be much larger than those nearby. true or false
jonny [76]

Answer:True

Explanation: Distant galaxies appear to be larger than those close by because of cosmic expansion. light from nearer galaxies travel farther and makes the other to be billions of years away. The farther it takes to get to another galaxy, the bigger it appears

3 0
3 years ago
A Gaussian surface in the form of a hemisphere of radius R = 3.04 cm lies in a uniform electric field of magnitude E = 1.64 N/C.
Likurg_2 [28]

Answer:

Part a)

\phi = -4.76 \times 10^{-3} Nm^2/C

Part b)

\phi_{curved} = 4.76 \times 10^{-3} Nm^2/C

Explanation:

Part a)

Electric flux entering into the base

so it is given as

\phi = E.A

\phi = - EA

\phi = -(1.64)(\pi r^2)

\phi = -(1.64)(\pi\times 0.0304^2)

\phi = -4.76 \times 10^{-3} Nm^2/C

Part b)

Now since we know that there is no enclosed charge in the hemisphere

so net flux must be zero

\phi_{curved} + \phi_{flat} = 0

\phi_{curved} - 4.76 \times 10^{-3} = 0

\phi_{curved} = 4.76 \times 10^{-3} Nm^2/C

7 0
2 years ago
Explain why an equation may be homogenous with respect to its unit but still be incorrect​
natima [27]
When both sides of an equation give the same units, same numerical values, and same concept we refer to the equation as being correct. ... Removing constants from correct equations make them homogeneous but incorrect.
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When you drop a pebble into a pond, the energy from the pebble acts on the water and causes waves. What is the wave?
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Answer:

A, The water moving away

Explanation:

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3 0
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