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3 years ago

How old is donald trumpp------ i NEED answer .

Physics

1 answer:

professor190 [17]3 years ago

7 0

Donald trump is 74 years old

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A 2 kg ball is thrown down with 50J of energy from a height of 10m, what is its velocity before it strikes the ground (neglect a

pochemuha

Answer:

V=14

Explanation:

PE=KE

mgh=1/2mv^2

2(9.8)10=1/2(2)v^2

(radical) 196= (radical)v

V=14

7 0

3 years ago

A boy pulls with a 20 N force, at a 20 degree incline. What part of the force moves the wagon?

nalin [4]

Answer:

horizontal direction force move wagon at 18.79 N

Explanation:

given data

force F = 20 N

angle = 20 degree

to find out

What part of the force moves the wagon

solution

we know here as per attach figure

boy pull a wagon at force 20 N at angle 20 degree

so there are 2 component

x in horizontal direction i.e F cos20

and y in vertical direction i.e F sin20

so we can say

horizontal direction force is move the wagon that is

horizontal direction force = F cos 20

horizontal direction force = 20× cos20

horizontal direction force = 18.79 N

so horizontal direction force move wagon at 18.79 N

4 0

3 years ago

YO IF YOU ARE GOOD AS SCIENCE PLEASE ANSWER THIS QUESTION IT WOULD HELP A LOT NO LINKS!!!

zhuklara [117]

Answer:

1 and 5 and 3

Explanation:

hope this helps

7 0

3 years ago

Read 2 more answers

Any two importance of measurement in points (i am giving you 30 points)

erma4kov [3.2K]

Answer:

1.It helps in trade and business.

2. It helps to perform scientific calculations.

5 0

3 years ago

A microphone is attached to a spring that is suspended from the ceiling, as the drawing indicates. Directly below on the floor i

Nutka1998 [239]

Answer:

$0.361\ \text{m}$

Explanation:

$f_s$ = Frequency of source = 375 Hz

$\Delta f$ = Difference between the maximum and minimum sound frequencies = 2.75 Hz

v = Speed of sound in air = 343 m/s

T = Time period = 1.8 s

$v_m$ = Maximum speed of the microphone

We have the relation

$\Delta f=2f_s\dfrac{v_m}{v}\\\Rightarrow v_m=\dfrac{\Delta fv}{2f_s}\\\Rightarrow v_m=\dfrac{2.75\times 343}{2\times 375}\\\Rightarrow v_m=1.26\ \text{m/s}$

Amplitude is given by

$A=\dfrac{v_mT}{2\pi}\\\Rightarrow A=\dfrac{1.26\times 1.8}{2\pi}\\\Rightarrow A=0.361\ \text{m}$

The amplitude of the simple harmonic motion is $0.361\ \text{m}$ .

5 0

3 years ago