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denis23 [38]
3 years ago
8

A ball is thrown vertically upwards with a velocity of 20 m s −1 from the top of a multistorey building of 25 m high. How high w

ill the ball rise from top of the building? (Take g = 10 m s
Physics
1 answer:
Sunny_sXe [5.5K]3 years ago
3 0

Answer:

20m

Explanation:

How high the ball rise from top of the building is the same as the maximum height reached by the ball

using equation of motion under gravity

V^2=U^2+2gs

making s the subject

U^2/2g

20^2/2×10=20m

You might be interested in
If this plastic cup is heated to its melting
Oduvanchick [21]

Answer:

A. The particles will begin to move enough

that they slide past each other.

Explanation:

When the plastic cup is heated, the Kinetic energy of its particles starts increasing. As the temperature rises, the kinetic energy keeps increasing. With the increase of K.E, the particles start moving faster and faster. When the temperature finally reaches the melting point, the K.E of the molecules is enough to break the bonds and slide past each other.

5 0
2 years ago
The potential difference between a pair of oppositely charged parallel plates is 398 V. If the spacing between the plates is dou
LiRa [457]

Answer:

Explanation:

capacitance of parallel plate capacitor

c = ε A / d , d is distance between plates , A is surface area , ε is constant

As d becomes two times , Capacitance c = 1/ 2 times ie c / 2

potential V = Q / C

Q is constant , potential

v = Q / c /2

= 2 . Q / C

= 2 V

So potential difference becomes 2 times.

NEW P D = 398 X 2

= 796 V.

6 0
3 years ago
Two power lines run parallel for a distance of 220 m and are separated by a distance of 40.0 cm. If the current in each of the t
daser333 [38]

Answer:

The magnitude of force is 1.86 N and the direction of force is towards the other wire.

Explanation:

Given:

Current flowing through each power line, I = 130 A

Distance between the two power lines, d = 40 cm = 0.4 m

Length of power lines, L = 220 m

The force exerted by the power lines on each other is given by the relation:

F = \frac{\mu_{0}LII }{2\pi d}

Substitute the suitable values in the above equation.

F = \frac{4\pi\times10^{-7}\times220\times130\times130 }{2\pi\times0.4}

F = 1.86 N

Since the direction of current flowing through the power lines are opposite to each other, so the force is attractive in nature. Hence, the direction of force experienced by the power lines on each other is towards the each other.

5 0
3 years ago
Which wave, the top or bottom, has the larger frequency. explain why.
choli [55]
The b<span>ottom one because it has longer wavelengths and because the bottom ones has 3 wavelengths</span>
3 0
2 years ago
The data table for the decomposition reaction of hydrogen peroxide H2 O2 shows how the reaction rate changes over time which sta
DedPeter [7]

I believe the answer is A.

4 0
2 years ago
Read 2 more answers
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