3 years ago

If the minimum velocity of a projectile is double the minimum velocity,the angle of projection is

1 answer:

5 0

This is a very clever and interesting exercise. I'm typing on a little telephone screen and it would take me a week to explain my reasoning, so I can only give my proposed answer. It's . . . 60 degrees above the horizon.

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A neutral boron atom has 6 neutrons and 5 electrons. How many protons does it have? Select one: a. 7 b. 6 c. 5 d. 4

Ksivusya [100]

If the atom is neutral, it has the same number of protons as electrons. If there are 5 electrons, there are also 5 protons.

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2 years ago

A ticker timer makes 50 dots per second. When a body is pulled by a tap through the timer, the distance between the third and fo

fenix001 [56]

Answer:

The acceleration is 1 cm/s^2.

Explanation:

The acceleration is defined as the rate of change of velocity.

Here, initial velocity, u = 3/1 = 3 cm/s

final velocity, v = 4/1 = 4 cm/s

time, t = 1 s

Let the acceleration is a.

Use first equation of motion

v = u + at

4 = 3 + 1 x a

a = 1 cm/s^2

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2 years ago

If John mows 11.5 meters of lawn from east

Oksanka [162]

I believe it would be 1.6 East

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3 years ago

What is a force that opposes tje movement of energy?

Oksanka [162]

Air resistance is the answer

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2 years ago

An astronaut on a small planet wishes to measure the local value of g by timing pulses traveling down a wire which has a large o

8_murik_8 [283]

Answer:

The gplanet is 0.193 m/s^2

Explanation:

The speed of the pulse is:

$v=\frac{lengthofthewipe}{traveltime} =\frac{1.6}{0.0656} =15.24m/s$

$v=\sqrt{\frac{MgL}{m} } \\v^{2} =\frac{MgL}{m} \\g=\frac{mv^{2} }{ML}$

where

m=mass of the wire=4 g= 4x10^-3 kg

M=mass of the object= 3 kg

Replacing values:

$g=\frac{4x10^{-3}*15.24^{2} }{3*1.6} =0.193 m/s^{2}$

7 0

3 years ago