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3 years ago

A 20-ton truck collides with a 1500-lb car and causes a lot of damage to the car. During the collision:

Physics

1 answer:

dexar [7]3 years ago

6 0

Answer:

B. the force of on the truck due to the collision is exactly equal to the force on the car.

Explanation:

At the time of collision between two objects of unequal or equal masses two forces emerge at the point of collision .They are called action and reaction force . According to third law of Newton , they are equal . So in the instant case of collision between car and truck , force on both of them will be equal.

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Which is NOT a subatomic particle

Novay_Z [31]

Answer:

both proton and neutron are subatomic particle

Explanation:

hope this helps u stay safe

6 0

4 years ago

The spectrum from a hydrogen vapour lamp is measured and four lines in the visible light range are observed. These lines are the

Elan Coil [88]

Answer:

$10942249.24 m^{-1}$

Explanation:

Rydberg's formula is used to describe the wavelengths of the spectral lines of chemical elements similar to hydrogen, that is, with only one electron being affected by the effective nuclear charge. In this formula we can find the rydberg constant, knowing the wavelength emitted in the transcision between two energy states, we can have a value of the constant.

$\frac{1}{\lambda}=Z^2R(\frac{1}{n^2_{1}}-\frac{1}{n^_{2}^2}})$

Where $\lambda$ it is the wavelength of the light emitted, R is the Rydberg constant, Z is the atomic number of the element and $n_{1} n_{2}$ are the states where $n_{1}$ .

In this case we have Z=1 for hydrogen, solving for R:

$R=\frac{1}{\lambda}*(\frac{1}{n^2_{1}}-\frac{1}{n^_{2}^2}})^{-1}\\R=\frac{1}{658.9*10^{-9}m}*(\frac{1}{2^2}-\frac{1}{3^2}})^{-1}\\R=1.52*10^6m^{-1}*(\frac{36}{5})=1.09*10^7 m^{-1}=10942249.24m^{-1}$

This value is quite close to the theoretical value of the constant $R=10967758.34 m^{-1}$

5 0

3 years ago

Pls help Which forces are shown on a free body diagram?

valentinak56 [21]

Answer:External forces acting on an object may include friction, gravity, normal force, drag, tension, or a human force due to pushing or pulling. When in a non-inertial reference frame (see coordinate system, below), fictitious forces, such as centrifugal pseudoforce are appropriate.

Explanation:

3 0

3 years ago

Two identical balls are thrown vertically upward. The second ball is thrown with an initial speed that is twice that of the firs

9966 [12]

Answer:

The maximum height of ball 2 is 4 times that of ball 1

Explanation:

We can find the maximum height of each ball by using the following suvat equation:

$v^2-u^2=2as$

where

v is the final velocity

u is the initial velocity

$a=g=-9.8 m/s^2$ is the acceleration of gravity (we take upward as positive direction)

s is the displacement

At the maximum height, s = h and v = 0 (the final velocity is zero), so re-arranging the equation:

$h=\frac{-u^2}{2g}$

The first ball is thrown with initial velocity $u_1$ , so it reaches a maximum height of

$h_1 = -\frac{u_1^2}{2g}$ (the quantity will be positive, since g is negative)

The second ball is thrown with initial velocity

$u_2 = u_1$

so it will reach a maximum height of

$h_2 = - \frac{u_2^2}{2g}=-\frac{(2u_1)^2}{2g}=4(-\frac{u_1^2}{2g}) = 4h_1$

So, its maximum height will be 4 times the maximum height reached by ball 1.

8 0

3 years ago

Energy transformed by a moving object is

QveST [7]

Kinetic energy is the energy an object has because of its motion. If we want to accelerate an object, then we must apply a force. ... Kinetic energy can be transferred between objects and transformed into other kinds of energy

4 0

4 years ago