Ask questions which are clear, concise and easy to understand.

Yogita Ingle 2 days, 15 hours ago

H = u²/(2g)
H = 20²/(2×10)
H = 20 m

The ball will reach 20 m high from the point of projection.
It reaches 20 + 20.5 = 40.5m high from the ground.

(b)
t1 = 2u/g
t1 = 2×20/10
t1 = 4 seconds

If v is the velocity with which it hits the ground then,
v = √(u² + 2aS)
v = √(20² + 2×10×25)
v = 30 m/s

v = u + at
t2 = (v - u)/g
t2 = (30 - 20)/10
t2 = 1 second

Time taken for it to hit the ground = t1 + t2
= 4 + 1
= 5 seconds

Note: I took g = 10m/s².

Mahakal Bhakt Vishnu 3 days, 3 hours ago

The strong nuclear for act between quarks and nucleons.The reason for evolving nuclear force is exchange of gluons.
Hiii bhai

Mukul Tyagi 3 days, 9 hours ago

V=100+-5 & I= 10+-0.2A R=V/I (∆R/R)×100= (∆V/V)×100 + (∆I/I)×100 (∆R/R)×100= (5/100)×100+(0.2/10)×100 (∆R/R)×100= (1/20)×100+(1/50)×100 (∆R/R)×100= (5+2)% (∆R/R)×100= 7% Answer.....

Shrutika Patil 3 days, 12 hours ago

________ and _________ are the factor of every number
Suno sona mb pe aayo na

Abhiansh Kumar 2 days, 15 hours ago

Kuch Bui nahi Sona ❤

❤Sona❤ ... 2 days, 19 hours ago

koi to hoge important topics

Ankit 💪💪 Kumar 3 days, 7 hours ago

,kuch bhi noi

Yogita Ingle 3 days, 17 hours ago

quantum (plural quanta )😊👍

Yogita Ingle 4 days, 15 hours ago

“The phenomenon of ejection of electrons from the surface of a metal when light of suitable frequency strikes on it, is called photoelectric effect.
The emitted electrons are called photoelectrons.”

Aadya Singh 4 days, 17 hours ago

P:Q:R = √2:√3:√2

Aadya Singh 4 days, 17 hours ago

Thank you😃

Pallavi Prasad 4 days, 22 hours ago

If resultant force is zero is known as equilibrium.

Royal Thakur 🤟 4 days, 21 hours ago

Royal Thakur 🤟 4 days, 21 hours ago

Thanks both of you...

Suhani Soni 4 days, 22 hours ago

Speed at a particular time or at an instant is called instantaneous speed.

Aadya Singh 4 days, 22 hours ago

Slope of distance- time graph...

Aadya Singh 4 days, 22 hours ago

Gud Mrng!!!!!

Akash Kushwaha 3 days, 15 hours ago

Cosx

Suhani Soni 4 days, 22 hours ago

Cos x

Aryan Soni 5 days, 4 hours ago

Cos x

Aadya Singh 5 days, 9 hours ago

Sharma Sadul😍 5 days, 14 hours ago

Let take the angle between P and Q is θ. The force expression according to given conditions are given as, P2+Q2+2PQcosθ=R2                                   (1) When Q is doubled, P2+4Q2+4PQcosθ=4R2                               (2) When Q is reversed, P2+Q2−2PQcosθ=4R2                                  (3) Subtracting equation (3) from equation (1), we get 4PQcosθ=−3R2 PQcosθ=4−3​R2                                        (4) Substituting the value from equation (4) to equation (1), (2) and (3), we get P2+Q2=25​R2 P2+4Q2=7R2 P2+Q2=25​R2 Simplify the above equations, we get P2=R2 Q2=23​R2 Thus, the ratio is P:Q:R=√2​:√3​:√2​.
ohh

Vivek Behera 5 days, 11 hours ago

No need to install the app again. Just logout & login again. Works with same no. also...😁😁

Sharma Sadul😍 5 days, 14 hours ago

U can again Install this app..and put another number to get OTP ..then u can use this app..properly..

Sharma Sadul😍 5 days, 14 hours ago

Oh!! 3 magic words I think😆😆

Sadul Sharma 6 days, 15 hours ago

***

Prashant Pandey 6 days, 15 hours ago

What

Anushka Verma 6 days, 18 hours ago

KE = 1/2mv^2

Yogita Ingle 1 week ago

Physics has a very wide scope. There are three domains of interest which are macroscopic domain, mesoscopic and microscopic domain. The macroscopic scale is the length scale on which objects or processes are of a size that is measurable and observable by the naked eye. The microscopic scale is the scale of size or length used to describe objects smaller than those that are easily be seen by the naked eye and which require a lens or microscope to see them clearly.

Prerna Kumari 6 days, 14 hours ago

least count of screw guage is 0.01 and least count of vernier calliper is 0.01

Sarthak Modi 1 week, 1 day ago

Sarthak Modi 1 week, 1 day ago

Screw is substance/object which helps to find the measurement of small length or radius of small particles.it is works similar to vernier calliper.it has high precision.

Ritesh Singh 1 week, 1 day ago

ML^2T^-2

## myCBSEguide

Trusted by 70 Lakh Students

#### CBSE Test Generator

Create papers in minutes

Print with your name & Logo

3 Lakhs+ Questions

Solutions Included

Based on CBSE Blueprint

Best fit for Schools & Tutors

#### Work from Home

• Work from home with us
• Create questions or review them from home

No software required, no contract to sign. Simply apply as teacher, take eligibility test and start working with us. Required desktop or laptop with internet connection

﻿