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3 years ago

Rudy plans to conduct an experiment using three rosebushes of the same variety and size. His hypothesis is that the plant

Physics

1 answer:

Gala2k [10]3 years ago

5 0

Answer: B) He has too many independent variables.

Explanation: Nothing in the experiment is a constant or being measured.

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During an auto accident, the vehicle’s air bags deploy and slow down the passengers more gently than if they had hit the windshi

const2013 [10]

Answer:

0.381 m

Explanation:

Distance traveled S is found by

$S = ut + \frac{1}{2}a{t^2}$

Where S is distance traveled, u is initial velocity, t is time, a is acceleration

Since we acceleration a is given as 60g, where g is gravitational constant of 9.81 then a=60*9.81=588.6

The initial velocity u is zero hence ut=0

Substituting a with 588.6, t with 36 ms

$\begin{array}{c}\\S = 0 + \frac{1}{2}\left( {588.6 {\rm{m/}}{{\rm{s}}^2}} \right){\left( {\left( {36 {\rm{ms}}} \right)\left( {\frac{{1 {\rm{s}}}}{{{{10}^3} {\rm{ms}}}}} \right)} \right)^2}\\\\ = 0.3814128
{\rm{m}}\\\end{array}$

S=0.381 m

4 0

3 years ago

When the material in the mantle cools off near the surface then sinks

MatroZZZ [7]

I’m guessing convection currents since you mention mantle and core, reminds me of heat

5 0

3 years ago

Liquefaction _____.

gogolik [260]

Answer:

D).happens when soil is weakened by water and seismic waves

Explanation:

Liquefaction is a phenomenon in which the strength of the soil weakens due to the earthquake or any other load. The solid behaves like a liquid. Liquefaction of soil below structures cause lot of damage during Earthquakes.The soil looses stiffness due to seismic waves and water.

Thus, the correct option is D.

3 0

3 years ago

A 90.0-kg man runs at a constant speed of 11.5 m/s. what is his kinetic energy?

harina [27]

The kinetic energy possessed by the man is 517.5 Joules.

Given the following data:

Mass = 90.0 kg

Velocity = 11.5 m/s.

To find the kinetic energy of the man:

Kinetic energy is an energy that is possessed by a physical object or body due to its motion.

Mathematically, kinetic energy is calculated by using the formula;

$K.E = \frac{1}{2} MV^2$

Where:

K.E is the kinetic energy.

M is the mass of an object.

V is the velocity of an object.

Substituting the given values, we have;

$K.E = \frac{1}{2}$ × $90$ × $11.5$

$K.E = 45$ × $11.5$

Kinetic energy = 517.5 Joules.

Therefore, the kinetic energy possessed by the man is 517.5 Joules.

8 0

3 years ago

An individual is nearsighted; his near point is 13.0 cm and his far point is 50.4 cm. what lens power is needed to correct his n

Colt1911 [192]

Answer:

= -1.984 Diopters

Explanation:

The lens should form an upright, virtual image at the far point.

Therefore;

The image distance, V will be -50.4 cm, since the image is virtual.

For objects at very far distant the object distance,u, will be ∞ ; This means that focal length, f, will be equivalent to image distance, v, that is -50.4 cm

Therefore; f = -50.4/100 = -0.504 m

But, since Power of a lens, P, is given by the reciprocal of focal length in meters, (1/f)

Then, power will be given by;

Power = 1/f

= 1/-0.504 m

=- 1.984

Power is measured in Diopters

Hence = -1.984 Diopters

5 0

3 years ago