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padilas [110]
3 years ago
11

A unit of mass is ??

Physics
1 answer:
Effectus [21]3 years ago
3 0
Hello,

Answer: kilogram

Further explaining: in science is used to measure weight of an object and used for accreditation.
Hope this helps!

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If two proton approach each other with speed of 400m\s and 450m\s respectively what is the total momentum of the two particle sy
lilavasa [31]

Answer: 83.65\times 10^{-27}\ kg.m/s

Explanation:

Given

The velocities of the protons are 400 m/s and 450 m/s

Mass of the Proton is m=1.673\times 10^{-27}\ kg

Since they travel in the opposite direction, therefore, their momentum cancels out each other.

Momentum is the product of mass and velocity

\therefore m(450-400)\\\Rightarrow 1.673\times 10^{-27}\times 50\\\Rightarrow 83.65\times 10^{-27}\ kg.m/s

The direction of momentum is in the direction of proton having 450 m/s velocity.

7 0
2 years ago
What is the relationship between electrical power, current, and voltage
love history [14]

Answer:

they both uses electric volts

4 0
3 years ago
It requires 49 J of work to stretch an ideal very light spring from a length of 1.4 m to a length of 2.9 m. What is the value of
nadya68 [22]

Answer:

44 N/m

Explanation:

The extension, e, of the spring = 2.9 m - 1.4 m = 1.5 m

The work needed to stretch a spring by <em>e</em> is given by

W = \frac{1}{2} ke^2

where <em>k</em> is spring constant.

k = \dfrac{2W}{e^2}

Using the appropriate values,

k = \dfrac{2\times 49\text{ J}}{1.5^2\text{ m}^2} = 43.55\ldots\text{ N/m} \approx 44\text{ N/m}

3 0
3 years ago
Read 2 more answers
What is the formula for calculating velocity/speed?
Marina CMI [18]

Explanation:

For velocity,

displaacement/time taken

For speed,

diatance travelled/time taken

8 0
2 years ago
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heat and pressure deep beneath Earth's surface can change any rock into A. chemical rock B. organic rock C. metamorphic rock D.
Y_Kistochka [10]
It should be a metamorphic rock as those rocks are formed due fue to heat and pressure
4 0
2 years ago
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