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3 years ago

HELPPP!!!!!100 POINTS AND WILL GIVE BRAINLIEST AND PROVIDE EXPLANATION!!!!

Physics

1 answer:

lbvjy [14]3 years ago

3 0

Answer:

There is a general trend of decreasing abundance with increasing atomic number, but elements with even atomic numbers tend to be more abundant than those with odd atomic numbers.

Explanation:

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A 5,000 Kg monster truck is traveling at 11 m/s. when it sees an obstacle it is going to crush during the Monster truck rally, i

avanturin [10]

The change in the kinetic energy of the monster truck during the time is 507500 J and the right option is B). 507500

<h3>What is kinetic energy?</h3>

Kinetic energy is the energy of a body due to its motion.

To calculate the increase in the kinetic energy of the monster truck, we use the formula below.

Formula:

ΔK.E = m(v²-u²)/2............. Equation 1

Where:

ΔK.E = Increase in kinetic energy of the monster truck
m = mass of the monster truck
v = final velocity of the monster truck
u = initial velocity of the monster truck.

From the question,

Given:

m = 5000 kg
v = 18 m/s
u = 11 m/s.

Substitute these values into equation 1

ΔK.E = 5000(18²-11²)/2
ΔK.E = 2500(324-121)
ΔK.E = 2500(203
ΔK.E = 507500 J

Hence, The increase in the kinetic energy of the monster truck during the time is 507500 J and the right option is B). 507500.
Learn more about kinetic energy here: brainly.com/question/25959744

5 0

3 years ago

A small truck has a mass of 2145 kg. How much work is required to decrease the speed of the vehicle from 25.0 m/s to 12.0 m/s on

MAXImum [283]

Answer:

The work required is -515,872.5 J

Explanation:

Work is defined in physics as the force that is applied to a body to move it from one point to another.

The total work W done on an object to move from one position A to another B is equal to the change in the kinetic energy of the object. That is, work is also defined as the change in the kinetic energy of an object.

Kinetic energy (Ec) depends on the mass and speed of the body. This energy is calculated by the expression:

$Ec=\frac{1}{2} *m*v^{2}$

where kinetic energy is measured in Joules (J), mass in kilograms (kg), and velocity in meters per second (m/s).

The work (W) of this force is equal to the difference between the final value and the initial value of the kinetic energy of the particle:

$W=\frac{1}{2} *m*v2^{2}-\frac{1}{2} *m*v1^{2}$

$W=\frac{1}{2} *m*(v2^{2}-v1^{2})$

In this case:

W=?
m= 2,145 kg
v2= 12 $\frac{m}{s}$

v1= 25 $\frac{m}{s}$

Replacing:

$W=\frac{1}{2} *2145 kg*((12\frac{m}{s} )^{2}-(25\frac{m}{s} )^{2})$

W= -515,872.5 J

<u><em>The work required is -515,872.5 J</em></u>

3 0

3 years ago

Suppose you are standing on the center of a merry-go-round that is at rest. You are holding a spinning bicycle wheel over your h

ioda

Answer:

B. It begins to rotate counterclockwise

Explanation:

It can happen that the merry-go-round remains at rest in the case when the person is standing on the axle of the merry go round whose axis is fixed to some rigid support, but here the person is standing at the center of the merry-go-round not at the axle hence the according to the conservation of angular momentum. Angular momentum is given as:

$L=I.\omega$

for the conservation of momentum

$I.\omega=I'.\omega'$

where:

$I=$ moment of inertia of the merry-go-round

$\omega=$ angular velocity of the merry-go-round

$I'=$ moment of inertia of the bicycle wheel

$\omega'=$ angular velocity of the wheel

As the person tries to stop the wheel which is rotating then the person feels an opposing force which tries to moves the whole system in its direction.

6 0

3 years ago

A metal rod with a length of 25.0 cm lies in the xy-plane and makes an angle of 37.5 ∘ with the positive x-axis and an angle of

pashok25 [27]

We are given with the following:
L = 25 cm
θx = <span>37.5</span>°<span>
</span>θy = 52.5°
vx = 6.8 m/s
B = 0.13i - 0.29j - 0.08k

And we are asked for the emf induced in the rod
E = B L v
Substitute the values for B and L into the equation. For v, use the given velocity along x and the angles to convert it to vector form. Then, solve for E.

5 0

3 years ago

How long is a string under 240 N of tension whose mass is 0.086 kg if a wave travels through it at a speed of 12 m/s?

Darina [25.2K]

Answer:

The length of the string is 0.051 meters

Explanation:

It is given that,

Tension in the string, T = 240 N

Mass of the string, m = 0.086 kg

Speed of the wave, v = 12 m/s

The speed of the wave on the string is given by :